styles

package
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 Go to latest Published: Dec 10, 2024 License: BSD-3-Clause Imports: 23 Imported by: 27

Documentation

Overview

Package styles contains the style structures for the Cogent Core GUI framework.

These are all based on the CSS standard: https://www.w3schools.com/cssref/default.asp

Package styles provides style objects containing style properties used for GUI widgets and other rendering contexts.

Index

Constants

This section is empty.

Variables

View Source 
var (
	// BorderRadiusExtraSmall indicates to use extra small
	// 4dp rounded corners
	BorderRadiusExtraSmall = NewSideValues(units.Dp(4))

	// BorderRadiusExtraSmallTop indicates to use extra small
	// 4dp rounded corners on the top of the element and no
	// border radius on the bottom of the element
	BorderRadiusExtraSmallTop = NewSideValues(units.Dp(4), units.Dp(4), units.Zero(), units.Zero())

	// BorderRadiusSmall indicates to use small
	// 8dp rounded corners
	BorderRadiusSmall = NewSideValues(units.Dp(8))

	// BorderRadiusMedium indicates to use medium
	// 12dp rounded corners
	BorderRadiusMedium = NewSideValues(units.Dp(12))

	// BorderRadiusLarge indicates to use large
	// 16dp rounded corners
	BorderRadiusLarge = NewSideValues(units.Dp(16))

	// BorderRadiusLargeEnd indicates to use large
	// 16dp rounded corners on the end (right side)
	// of the element and no border radius elsewhere
	BorderRadiusLargeEnd = NewSideValues(units.Zero(), units.Dp(16), units.Dp(16), units.Zero())

	// BorderRadiusLargeTop indicates to use large
	// 16dp rounded corners on the top of the element
	// and no border radius on the bottom of the element
	BorderRadiusLargeTop = NewSideValues(units.Dp(16), units.Dp(16), units.Zero(), units.Zero())

	// BorderRadiusExtraLarge indicates to use extra large
	// 28dp rounded corners
	BorderRadiusExtraLarge = NewSideValues(units.Dp(28))

	// BorderRadiusExtraLargeTop indicates to use extra large
	// 28dp rounded corners on the top of the element
	// and no border radius on the bottom of the element
	BorderRadiusExtraLargeTop = NewSideValues(units.Dp(28), units.Dp(28), units.Zero(), units.Zero())

	// BorderRadiusFull indicates to use a full border radius,
	// which creates a circular/pill-shaped object.
	// It is defined to be a value that the width/height of an object
	// will never exceed.
	BorderRadiusFull = NewSideValues(units.Dp(1_000_000_000))
)

Pre-configured border radius values, based on https://m3.material.io/styles/shape/shape-scale-tokens

View Source 
var DefaultScrollbarWidth = units.Dp(10)

DefaultScrollbarWidth is the default [Style.ScrollbarWidth].

View Source 
var FontSizePoints = map[string]float32{
	"xx-small": 7,
	"x-small":  7.5,
	"small":    10,
	"smallf":   10,
	"medium":   12,
	"large":    14,
	"x-large":  18,
	"xx-large": 24,
}

FontSizePoints maps standard font names to standard point sizes -- we use dpi zoom scaling instead of rescaling "medium" font size, so generally use these values as-is. smaller and larger relative scaling can move in 2pt increments

View Source 
var FontStretchNames = []string{"Normal", "UltraCondensed", "ExtraCondensed", "SemiCondensed", "SemiExpanded", "ExtraExpanded", "UltraExpanded", "Condensed", "Expanded", "Condensed", "Expanded"}

FontStretchNames contains the uppercase names of all the valid font stretches used in the regularized font names. The first name is the baseline default and will be omitted from font names. Order must have names that are subsets of other names at the end so they only match if the more specific one hasn't! And also match the FontStretch enum.

View Source 
var FontStyleNames = []string{"Normal", "Italic", "Oblique"}

FontStyleNames contains the uppercase names of all the valid font styles used in the regularized font names. The first name is the baseline default and will be omitted from font names.

View Source 
var FontWeightNameValues = []FontWeights{WeightNormal, WeightThin, WeightExtraLight, WeightLight, WeightMedium, WeightSemiBold, WeightExtraBold, WeightBold, WeightBlack}

FontWeightNameValues is 1-to-1 index map from FontWeightNames to corresponding weight value (using more semantic term instead of numerical one)

View Source 
var FontWeightNames = []string{"Normal", "Thin", "ExtraLight", "Light", "Medium", "SemiBold", "ExtraBold", "Bold", "Black"}

FontWeightNames contains the uppercase names of all the valid font weights used in the regularized font names. The first name is the baseline default and will be omitted from font names. Order must have names that are subsets of other names at the end so they only match if the more specific one hasn't!

View Source 
var FontWeightToNameMap = map[FontWeights]string{
	Weight100:        "Thin",
	WeightThin:       "Thin",
	Weight200:        "ExtraLight",
	WeightExtraLight: "ExtraLight",
	Weight300:        "Light",
	WeightLight:      "Light",
	Weight400:        "",
	WeightNormal:     "",
	Weight500:        "Medium",
	WeightMedium:     "Medium",
	Weight600:        "SemiBold",
	WeightSemiBold:   "SemiBold",
	Weight700:        "Bold",
	WeightBold:       "Bold",
	Weight800:        "ExtraBold",
	WeightExtraBold:  "ExtraBold",
	Weight900:        "Black",
	WeightBlack:      "Black",
	WeightBolder:     "Medium",
	WeightLighter:    "Light",
}

FontWeightToNameMap maps all the style enums to canonical regularized font names

View Source 
var LineHeightNormal = units.Dp(-1)

LineHeightNormal represents a normal line height, equal to the default height of the font being used.

View Source 
var PrefFontFamily = "Roboto"

PrefFontFamily is the preferred fallback font family to use when the specified font is not available. It defaults to Roboto.

View Source 
var SettingsFont, SettingsMonoFont *string

SettingsFont and SettingsMonoFont are pointers to Font and MonoFont in [core.AppearanceSettings], which are used in Style.SetMono if non-nil. They are set automatically by core, so end users should typically not have to interact with them.

Functions

func AlignFactor 

func AlignFactor(al Aligns) float32

func AlignPos 

func AlignPos(align Aligns, inner, outer float32) float32

AlignPos returns the position offset based on Align.X,Y settings for given inner-sized box within given outer-sized container box.

func ClampMax 

func ClampMax(v, mx float32) float32

ClampMax returns given value, not greater than given max _only if_ max > 0

func ClampMaxVector added in v0.0.10 

func ClampMaxVector(v, mx math32.Vector2) math32.Vector2

ClampMaxVector returns given Vector2 values, not greater than given max _only if_ max > 0

func ClampMin 

func ClampMin(v, mn float32) float32

ClampMin returns given value, not less than given min _only if_ min > 0

func ClampMinVector added in v0.0.10 

func ClampMinVector(v, mn math32.Vector2) math32.Vector2

ClampMinVector returns given Vector2 values, not less than given min _only if_ min > 0

func FixFontMods 

func FixFontMods(fn string) string

FixFontMods ensures that standard font modifiers have a space in front of them, and that the default is not in the name -- used for regularizing font names.

func FontNameFromMods 

func FontNameFromMods(basenm string, str FontStretch, wt FontWeights, sty FontStyles) string

FontNameFromMods generates the appropriate regularized file name based on base name and modifiers

func FontNameToMods 

func FontNameToMods(fn string) (basenm string, str FontStretch, wt FontWeights, sty FontStyles)

FontNameToMods parses the regularized font name and returns the appropriate base name and associated font mods.

func ObjectSizeFromFit added in v0.0.3 

func ObjectSizeFromFit(fit ObjectFits, obj, box math32.Vector2) math32.Vector2

ObjectSizeFromFit returns the target object size based on the given ObjectFits setting, original object size, and target box size for the object to fit into.

func SetClampMax 

func SetClampMax(v *float32, mx float32)

SetClampMax ensures the given value is not greater than given max _only if_ max > 0

func SetClampMaxVector added in v0.0.10 

func SetClampMaxVector(v *math32.Vector2, mx math32.Vector2)

SetClampMaxVector ensures the given Vector2 values are not greater than given max _only if_ max > 0

func SetClampMin 

func SetClampMin(v *float32, mn float32)

SetClampMin ensures the given value is not less than given min _only if_ min > 0

func SetClampMinVector added in v0.0.10 

func SetClampMinVector(v *math32.Vector2, mn math32.Vector2)

SetClampMinVector ensures the given Vector2 values are not less than given min _only if_ min > 0

func SetStylePropertiesXML added in v0.0.10 

func SetStylePropertiesXML(style string, properties *map[string]any)

SetStylePropertiesXML sets style properties from XML style string, which contains ';' separated name: value pairs

func SidesAreSame 

func SidesAreSame[T comparable](s Sides[T]) bool

SidesAreSame returns whether all of the sides/corners are the same

func SidesAreZero 

func SidesAreZero[T comparable](s Sides[T]) bool

SidesAreZero returns whether all of the sides/corners are equal to zero

func StylePropertiesXML added in v0.0.10 

func StylePropertiesXML(properties map[string]any) string

StylePropertiesXML returns style properties for XML style string, which contains ';' separated name: value pairs

func SubProperties added in v0.0.10 

func SubProperties(prp map[string]any, selector string) (map[string]any, bool)

SubProperties returns a sub-property map from given prop map for a given styling selector (property name) -- e.g., :normal :active :hover etc -- returns false if not found

func ToCSS added in v0.3.1 

func ToCSS(s *Style, idName, htmlName string) string

ToCSS converts the given Style object to a semicolon-separated CSS string. It is not guaranteed to be fully complete or accurate. It also takes the kebab-case ID name of the associated widget and the resultant html element name for context.

Types

type AlignSet 

type AlignSet struct {
	// Content specifies the distribution of the entire collection of items within
	// any larger amount of space allocated to the container.  By contrast, Items
	// and Self specify distribution within the individual element's allocated space.
	Content Aligns

	// Items specifies the distribution within the individual element's allocated space,
	// as a default for all items within a collection.
	Items Aligns

	// Self specifies the distribution within the individual element's allocated space,
	// for this specific item.  Auto defaults to containers Items setting.
	Self Aligns
}

AlignSet specifies the 3 levels of Justify or Align: Content, Items, and Self

func (*AlignSet) Defaults 

func (as *AlignSet) Defaults()

type Aligns 

type Aligns int32 //enums:enum -transform kebab

Aligns has all different types of alignment and justification. 

const (
	// Auto means the item uses the container's AlignItems value
	Auto Aligns = iota

	// Align items to the start (top, left) of layout
	Start

	// Align items to the end (bottom, right) of layout
	End

	// Align items centered
	Center

	// Align to text baselines
	Baseline

	// First and last are flush, equal space between remaining items
	SpaceBetween

	// First and last have 1/2 space at edges, full space between remaining items
	SpaceAround

	// Equal space at start, end, and between all items
	SpaceEvenly
)
const AlignsN Aligns = 8

AlignsN is the highest valid value for type Aligns, plus one.

func AlignsValues 

func AlignsValues() []Aligns

AlignsValues returns all possible values for the type Aligns.

func ItemAlign 

func ItemAlign(parItems, self Aligns) Aligns

ItemAlign returns the effective Aligns value between parent Items and Self

func (Aligns) Desc 

func (i Aligns) Desc() string

Desc returns the description of the Aligns value.

func (Aligns) Int64 

func (i Aligns) Int64() int64

Int64 returns the Aligns value as an int64.

func (Aligns) MarshalText 

func (i Aligns) MarshalText() ([]byte, error)

MarshalText implements the encoding.TextMarshaler interface.

func (*Aligns) SetInt64 

func (i *Aligns) SetInt64(in int64)

SetInt64 sets the Aligns value from an int64.

func (*Aligns) SetString 

func (i *Aligns) SetString(s string) error

SetString sets the Aligns value from its string representation, and returns an error if the string is invalid.

func (Aligns) String 

func (i Aligns) String() string

String returns the string representation of this Aligns value.

func (*Aligns) UnmarshalText 

func (i *Aligns) UnmarshalText(text []byte) error

UnmarshalText implements the encoding.TextUnmarshaler interface.

func (Aligns) Values 

func (i Aligns) Values() []enums.Enum

Values returns all possible values for the type Aligns.

type BaselineShifts 

type BaselineShifts int32 //enums:enum -trim-prefix Shift -transform kebab

BaselineShifts are for super / sub script 

const (
	ShiftBaseline BaselineShifts = iota
	ShiftSuper
	ShiftSub
)
const BaselineShiftsN BaselineShifts = 3

BaselineShiftsN is the highest valid value for type BaselineShifts, plus one.

func BaselineShiftsValues 

func BaselineShiftsValues() []BaselineShifts

BaselineShiftsValues returns all possible values for the type BaselineShifts.

func (BaselineShifts) Desc 

func (i BaselineShifts) Desc() string

Desc returns the description of the BaselineShifts value.

func (BaselineShifts) Int64 

func (i BaselineShifts) Int64() int64

Int64 returns the BaselineShifts value as an int64.

func (BaselineShifts) MarshalText 

func (i BaselineShifts) MarshalText() ([]byte, error)

MarshalText implements the encoding.TextMarshaler interface.

func (*BaselineShifts) SetInt64 

func (i *BaselineShifts) SetInt64(in int64)

SetInt64 sets the BaselineShifts value from an int64.

func (*BaselineShifts) SetString 

func (i *BaselineShifts) SetString(s string) error

SetString sets the BaselineShifts value from its string representation, and returns an error if the string is invalid.

func (BaselineShifts) String 

func (i BaselineShifts) String() string

String returns the string representation of this BaselineShifts value.

func (*BaselineShifts) UnmarshalText 

func (i *BaselineShifts) UnmarshalText(text []byte) error

UnmarshalText implements the encoding.TextUnmarshaler interface.

func (BaselineShifts) Values 

func (i BaselineShifts) Values() []enums.Enum

Values returns all possible values for the type BaselineShifts.

type Border 

type Border struct {

	// Style specifies how to draw the border
	Style Sides[BorderStyles]

	// Width specifies the width of the border
	Width SideValues `display:"inline"`

	// Radius specifies the radius (rounding) of the corners
	Radius SideValues `display:"inline"`

	// Offset specifies how much, if any, the border is offset
	// from its element. It is only applicable in the standard
	// box model, which is used by [paint.Context.DrawStdBox] and
	// all standard GUI elements.
	Offset SideValues `display:"inline"`

	// Color specifies the color of the border
	Color Sides[image.Image] `display:"inline"`
}

Border contains style parameters for borders

func (*Border) ToDots 

func (bs *Border) ToDots(uc *units.Context)

ToDots runs ToDots on unit values, to compile down to raw pixels

type BorderStyles 

type BorderStyles int32 //enums:enum -trim-prefix Border -transform kebab

BorderStyles determines how to draw the border 

const (
	// BorderSolid indicates to render a solid border.
	BorderSolid BorderStyles = iota

	// BorderDotted indicates to render a dotted border.
	BorderDotted

	// BorderDashed indicates to render a dashed border.
	BorderDashed

	// BorderDouble is not currently supported.
	BorderDouble

	// BorderGroove is not currently supported.
	BorderGroove

	// BorderRidge is not currently supported.
	BorderRidge

	// BorderInset is not currently supported.
	BorderInset

	// BorderOutset is not currently supported.
	BorderOutset

	// BorderNone indicates to render no border.
	BorderNone
)
const BorderStylesN BorderStyles = 9

BorderStylesN is the highest valid value for type BorderStyles, plus one.

func BorderStylesValues 

func BorderStylesValues() []BorderStyles

BorderStylesValues returns all possible values for the type BorderStyles.

func (BorderStyles) Desc 

func (i BorderStyles) Desc() string

Desc returns the description of the BorderStyles value.

func (BorderStyles) Int64 

func (i BorderStyles) Int64() int64

Int64 returns the BorderStyles value as an int64.

func (BorderStyles) MarshalText 

func (i BorderStyles) MarshalText() ([]byte, error)

MarshalText implements the encoding.TextMarshaler interface.

func (*BorderStyles) SetInt64 

func (i *BorderStyles) SetInt64(in int64)

SetInt64 sets the BorderStyles value from an int64.

func (*BorderStyles) SetString 

func (i *BorderStyles) SetString(s string) error

SetString sets the BorderStyles value from its string representation, and returns an error if the string is invalid.

func (BorderStyles) String 

func (i BorderStyles) String() string

String returns the string representation of this BorderStyles value.

func (*BorderStyles) UnmarshalText 

func (i *BorderStyles) UnmarshalText(text []byte) error

UnmarshalText implements the encoding.TextUnmarshaler interface.

func (BorderStyles) Values 

func (i BorderStyles) Values() []enums.Enum

Values returns all possible values for the type BorderStyles.

type Directions 

type Directions int32 //enums:enum -transform kebab

Direction specifies the way in which elements are laid out, or the dimension on which an element is longer / travels in. 

const (
	// Row indicates that elements are laid out in a row
	// or that an element is longer / travels in the x dimension.
	Row Directions = iota

	// Column indicates that elements are laid out in a column
	// or that an element is longer / travels in the y dimension.
	Column
)
const DirectionsN Directions = 2

DirectionsN is the highest valid value for type Directions, plus one.

func DirectionsValues 

func DirectionsValues() []Directions

DirectionsValues returns all possible values for the type Directions.

func (Directions) Desc 

func (i Directions) Desc() string

Desc returns the description of the Directions value.

func (Directions) Dim 

func (d Directions) Dim() math32.Dims

Dim returns the corresponding dimension for the direction.

func (Directions) Int64 

func (i Directions) Int64() int64

Int64 returns the Directions value as an int64.

func (Directions) MarshalText 

func (i Directions) MarshalText() ([]byte, error)

MarshalText implements the encoding.TextMarshaler interface.

func (Directions) Other 

func (d Directions) Other() Directions

Other returns the opposite (other) direction.

func (*Directions) SetInt64 

func (i *Directions) SetInt64(in int64)

SetInt64 sets the Directions value from an int64.

func (*Directions) SetString 

func (i *Directions) SetString(s string) error

SetString sets the Directions value from its string representation, and returns an error if the string is invalid.

func (Directions) String 

func (i Directions) String() string

String returns the string representation of this Directions value.

func (*Directions) UnmarshalText 

func (i *Directions) UnmarshalText(text []byte) error

UnmarshalText implements the encoding.TextUnmarshaler interface.

func (Directions) Values 

func (i Directions) Values() []enums.Enum

Values returns all possible values for the type Directions.

type Displays 

type Displays int32 //enums:enum -trim-prefix Display -transform kebab

Displays determines how items are displayed. 

const (
	// Flex is the default layout model, based on a simplified version of the
	// CSS flex layout: uses MainAxis to specify the direction, Wrap for
	// wrapping of elements, and Min, Max, and Grow values on elements to
	// determine sizing.
	Flex Displays = iota

	// Stacked is a stack of elements, with one on top that is visible
	Stacked

	// Grid is the X, Y grid layout, with Columns specifying the number
	// of elements in the X axis.
	Grid

	// Custom means that no automatic layout will be applied to elements,
	// which can then be managed via custom code by setting the [Style.Pos] position.
	Custom

	// None means the item is not displayed: sets the Invisible state
	DisplayNone
)
const DisplaysN Displays = 5

DisplaysN is the highest valid value for type Displays, plus one.

func DisplaysValues 

func DisplaysValues() []Displays

DisplaysValues returns all possible values for the type Displays.

func (Displays) Desc 

func (i Displays) Desc() string

Desc returns the description of the Displays value.

func (Displays) Int64 

func (i Displays) Int64() int64

Int64 returns the Displays value as an int64.

func (Displays) MarshalText 

func (i Displays) MarshalText() ([]byte, error)

MarshalText implements the encoding.TextMarshaler interface.

func (*Displays) SetInt64 

func (i *Displays) SetInt64(in int64)

SetInt64 sets the Displays value from an int64.

func (*Displays) SetString 

func (i *Displays) SetString(s string) error

SetString sets the Displays value from its string representation, and returns an error if the string is invalid.

func (Displays) String 

func (i Displays) String() string

String returns the string representation of this Displays value.

func (*Displays) UnmarshalText 

func (i *Displays) UnmarshalText(text []byte) error

UnmarshalText implements the encoding.TextUnmarshaler interface.

func (Displays) Values 

func (i Displays) Values() []enums.Enum

Values returns all possible values for the type Displays.

type Fill 

type Fill struct {

	// fill color image specification; filling is off if nil
	Color image.Image

	// global alpha opacity / transparency factor between 0 and 1
	Opacity float32

	// rule for how to fill more complex shapes with crossing lines
	Rule FillRules
}

Fill contains all the properties for filling a region

func (*Fill) Defaults 

func (pf *Fill) Defaults()

Defaults initializes default values for paint fill

func (*Fill) ToDots 

func (fs *Fill) ToDots(uc *units.Context)

ToDots runs ToDots on unit values, to compile down to raw pixels

type FillRules 

type FillRules int32 //enums:enum -trim-prefix FillRule -transform kebab

const (
	FillRuleNonZero FillRules = iota
	FillRuleEvenOdd
)
const FillRulesN FillRules = 2

FillRulesN is the highest valid value for type FillRules, plus one.

func FillRulesValues 

func FillRulesValues() []FillRules

FillRulesValues returns all possible values for the type FillRules.

func (FillRules) Desc 

func (i FillRules) Desc() string

Desc returns the description of the FillRules value.

func (FillRules) Int64 

func (i FillRules) Int64() int64

Int64 returns the FillRules value as an int64.

func (FillRules) MarshalText 

func (i FillRules) MarshalText() ([]byte, error)

MarshalText implements the encoding.TextMarshaler interface.

func (*FillRules) SetInt64 

func (i *FillRules) SetInt64(in int64)

SetInt64 sets the FillRules value from an int64.

func (*FillRules) SetString 

func (i *FillRules) SetString(s string) error

SetString sets the FillRules value from its string representation, and returns an error if the string is invalid.

func (FillRules) String 

func (i FillRules) String() string

String returns the string representation of this FillRules value.

func (*FillRules) UnmarshalText 

func (i *FillRules) UnmarshalText(text []byte) error

UnmarshalText implements the encoding.TextUnmarshaler interface.

func (FillRules) Values 

func (i FillRules) Values() []enums.Enum

Values returns all possible values for the type FillRules.

type Font 

type Font struct {

	// size of font to render (inherited); converted to points when getting font to use
	Size units.Value

	// font family (inherited): ordered list of comma-separated names from more general to more specific to use; use split on , to parse
	Family string

	// style (inherited): normal, italic, etc
	Style FontStyles

	// weight (inherited): normal, bold, etc
	Weight FontWeights

	// font stretch / condense options (inherited)
	Stretch FontStretch

	// normal or small caps (inherited)
	Variant FontVariants

	// Decoration contains the bit flag [TextDecorations]
	// (underline, line-through, etc). It must be set using
	// [Font.SetDecoration] since it contains bit flags.
	// It is not inherited.
	Decoration TextDecorations

	// super / sub script (not inherited)
	Shift BaselineShifts

	// full font information including enhanced metrics and actual font codes for drawing text; this is a pointer into FontLibrary of loaded fonts
	Face *FontFace `display:"-"`
}

Font contains all font styling information. Most of font information is inherited. Font does not include all information needed for rendering -- see FontRender for that.

func (*Font) Defaults 

func (fs *Font) Defaults()

func (*Font) InheritFields 

func (fs *Font) InheritFields(parent *Font)

InheritFields from parent

func (*Font) SetDecoration added in v0.0.5 

func (fs *Font) SetDecoration(deco ...TextDecorations)

SetDecoration sets text decoration (underline, etc), which uses bitflags to allow multiple combinations.

func (*Font) SetStyleProperties added in v0.0.10 

func (fs *Font) SetStyleProperties(parent *Font, properties map[string]any, ctxt colors.Context)

SetStyleProperties sets font style values based on given property map (name: value pairs), inheriting elements as appropriate from parent, and also having a default style for the "initial" setting.

func (*Font) SetUnitContext 

func (fs *Font) SetUnitContext(uc *units.Context)

SetUnitContext sets the font-specific information in the given units.Context, based on the currently loaded face.

func (*Font) StyleFromProperties added in v0.0.10 

func (fs *Font) StyleFromProperties(parent *Font, properties map[string]any, ctxt colors.Context)

func (*Font) ToDots 

func (fs *Font) ToDots(uc *units.Context)

ToDots runs ToDots on unit values, to compile down to raw pixels

type FontFace 

type FontFace struct {

	// The full FaceName that the font is accessed by
	Name string

	// The integer font size in raw dots
	Size int

	// The system image.Font font rendering interface
	Face font.Face

	// enhanced metric information for the font
	Metrics FontMetrics
}

FontFace is our enhanced Font Face structure which contains the enhanced computed metrics in addition to the font.Face face

func NewFontFace 

func NewFontFace(nm string, sz int, face font.Face) *FontFace

NewFontFace returns a new font face

func (*FontFace) ComputeMetrics 

func (fs *FontFace) ComputeMetrics()

ComputeMetrics computes the Height, Em, Ex, Ch and Rem metrics associated with current font and overall units context

type FontMetrics 

type FontMetrics struct {

	// reference 1.0 spacing line height of font in dots -- computed from font as ascent + descent + lineGap, where lineGap is specified by the font as the recommended line spacing
	Height float32

	// Em size of font -- this is NOT actually the width of the letter M, but rather the specified point size of the font (in actual display dots, not points) -- it does NOT include the descender and will not fit the entire height of the font
	Em float32

	// Ex size of font -- this is the actual height of the letter x in the font
	Ex float32

	// Ch size of font -- this is the actual width of the 0 glyph in the font
	Ch float32
}

FontMetrics are our enhanced dot-scale font metrics compared to what is available in the standard font.Metrics lib, including Ex and Ch being defined in terms of the actual letter x and 0

type FontRender 

type FontRender struct {
	Font

	// text color (inherited)
	Color image.Image

	// background color (not inherited, transparent by default)
	Background image.Image

	// alpha value between 0 and 1 to apply to the foreground and background of this element and all of its children
	Opacity float32
}

FontRender contains all font styling information that is needed for SVG text rendering. It is passed to Paint and Style functions. It should typically not be used by end-user code -- see Font for that. It stores all values as pointers so that they correspond to the values of the style object it was derived from.

func (*FontRender) Defaults 

func (fr *FontRender) Defaults()

func (*FontRender) InheritFields 

func (fr *FontRender) InheritFields(parent *FontRender)

InheritFields from parent

func (*FontRender) SetStyleProperties added in v0.0.10 

func (fr *FontRender) SetStyleProperties(parent *FontRender, properties map[string]any, ctxt colors.Context)

SetStyleProperties sets font style values based on given property map (name: value pairs), inheriting elements as appropriate from parent, and also having a default style for the "initial" setting.

func (*FontRender) StyleRenderFromProperties added in v0.0.10 

func (fs *FontRender) StyleRenderFromProperties(parent *FontRender, properties map[string]any, ctxt colors.Context)

type FontStretch 

type FontStretch int32 //enums:enum -trim-prefix FontStr

FontStretch are different stretch levels of font. These are less typically available on most platforms by default. 

const (
	FontStrNormal FontStretch = iota
	FontStrUltraCondensed
	FontStrExtraCondensed
	FontStrSemiCondensed
	FontStrSemiExpanded
	FontStrExtraExpanded
	FontStrUltraExpanded
	FontStrCondensed
	FontStrExpanded
	FontStrNarrower
	FontStrWider
)
const FontStretchN FontStretch = 11

FontStretchN is the highest valid value for type FontStretch, plus one.

func FontStretchValues 

func FontStretchValues() []FontStretch

FontStretchValues returns all possible values for the type FontStretch.

func (FontStretch) Desc 

func (i FontStretch) Desc() string

Desc returns the description of the FontStretch value.

func (FontStretch) Int64 

func (i FontStretch) Int64() int64

Int64 returns the FontStretch value as an int64.

func (FontStretch) MarshalText 

func (i FontStretch) MarshalText() ([]byte, error)

MarshalText implements the encoding.TextMarshaler interface.

func (*FontStretch) SetInt64 

func (i *FontStretch) SetInt64(in int64)

SetInt64 sets the FontStretch value from an int64.

func (*FontStretch) SetString 

func (i *FontStretch) SetString(s string) error

SetString sets the FontStretch value from its string representation, and returns an error if the string is invalid.

func (FontStretch) String 

func (i FontStretch) String() string

String returns the string representation of this FontStretch value.

func (*FontStretch) UnmarshalText 

func (i *FontStretch) UnmarshalText(text []byte) error

UnmarshalText implements the encoding.TextUnmarshaler interface.

func (FontStretch) Values 

func (i FontStretch) Values() []enums.Enum

Values returns all possible values for the type FontStretch.

type FontStyles 

type FontStyles int32 //enums:enum -trim-prefix Font -transform kebab

FontStyles styles of font: normal, italic, etc 

const (
	FontNormal FontStyles = iota

	// Italic indicates to make font italic
	Italic

	// Oblique indicates to make font slanted
	Oblique
)
const FontStylesN FontStyles = 3

FontStylesN is the highest valid value for type FontStyles, plus one.

func FontStylesValues 

func FontStylesValues() []FontStyles

FontStylesValues returns all possible values for the type FontStyles.

func (FontStyles) Desc 

func (i FontStyles) Desc() string

Desc returns the description of the FontStyles value.

func (FontStyles) Int64 

func (i FontStyles) Int64() int64

Int64 returns the FontStyles value as an int64.

func (FontStyles) MarshalText 

func (i FontStyles) MarshalText() ([]byte, error)

MarshalText implements the encoding.TextMarshaler interface.

func (*FontStyles) SetInt64 

func (i *FontStyles) SetInt64(in int64)

SetInt64 sets the FontStyles value from an int64.

func (*FontStyles) SetString 

func (i *FontStyles) SetString(s string) error

SetString sets the FontStyles value from its string representation, and returns an error if the string is invalid.

func (FontStyles) String 

func (i FontStyles) String() string

String returns the string representation of this FontStyles value.

func (*FontStyles) UnmarshalText 

func (i *FontStyles) UnmarshalText(text []byte) error

UnmarshalText implements the encoding.TextUnmarshaler interface.

func (FontStyles) Values 

func (i FontStyles) Values() []enums.Enum

Values returns all possible values for the type FontStyles.

type FontVariants 

type FontVariants int32 //enums:enum -trim-prefix FontVar -transform kebab

FontVariants is just normal vs. small caps. todo: not currently supported 

const (
	FontVarNormal FontVariants = iota
	FontVarSmallCaps
)
const FontVariantsN FontVariants = 2

FontVariantsN is the highest valid value for type FontVariants, plus one.

func FontVariantsValues 

func FontVariantsValues() []FontVariants

FontVariantsValues returns all possible values for the type FontVariants.

func (FontVariants) Desc 

func (i FontVariants) Desc() string

Desc returns the description of the FontVariants value.

func (FontVariants) Int64 

func (i FontVariants) Int64() int64

Int64 returns the FontVariants value as an int64.

func (FontVariants) MarshalText 

func (i FontVariants) MarshalText() ([]byte, error)

MarshalText implements the encoding.TextMarshaler interface.

func (*FontVariants) SetInt64 

func (i *FontVariants) SetInt64(in int64)

SetInt64 sets the FontVariants value from an int64.

func (*FontVariants) SetString 

func (i *FontVariants) SetString(s string) error

SetString sets the FontVariants value from its string representation, and returns an error if the string is invalid.

func (FontVariants) String 

func (i FontVariants) String() string

String returns the string representation of this FontVariants value.

func (*FontVariants) UnmarshalText 

func (i *FontVariants) UnmarshalText(text []byte) error

UnmarshalText implements the encoding.TextUnmarshaler interface.

func (FontVariants) Values 

func (i FontVariants) Values() []enums.Enum

Values returns all possible values for the type FontVariants.

type FontWeights 

type FontWeights int32 //enums:enum -trim-prefix Weight -transform kebab

FontWeights are the valid names for different weights of font, with both the numeric and standard names given. The regularized font names in the font library use the names, as those are typically found in the font files. 

const (
	WeightNormal FontWeights = iota
	Weight100
	WeightThin // (Hairline)
	Weight200
	WeightExtraLight // (UltraLight)
	Weight300
	WeightLight
	Weight400
	Weight500
	WeightMedium
	Weight600
	WeightSemiBold // (DemiBold)
	Weight700
	WeightBold
	Weight800
	WeightExtraBold // (UltraBold)
	Weight900
	WeightBlack
	WeightBolder
	WeightLighter
)
const FontWeightsN FontWeights = 20

FontWeightsN is the highest valid value for type FontWeights, plus one.

func FontWeightsValues 

func FontWeightsValues() []FontWeights

FontWeightsValues returns all possible values for the type FontWeights.

func (FontWeights) Desc 

func (i FontWeights) Desc() string

Desc returns the description of the FontWeights value.

func (FontWeights) Int64 

func (i FontWeights) Int64() int64

Int64 returns the FontWeights value as an int64.

func (FontWeights) MarshalText 

func (i FontWeights) MarshalText() ([]byte, error)

MarshalText implements the encoding.TextMarshaler interface.

func (*FontWeights) SetInt64 

func (i *FontWeights) SetInt64(in int64)

SetInt64 sets the FontWeights value from an int64.

func (*FontWeights) SetString 

func (i *FontWeights) SetString(s string) error

SetString sets the FontWeights value from its string representation, and returns an error if the string is invalid.

func (FontWeights) String 

func (i FontWeights) String() string

String returns the string representation of this FontWeights value.

func (*FontWeights) UnmarshalText 

func (i *FontWeights) UnmarshalText(text []byte) error

UnmarshalText implements the encoding.TextUnmarshaler interface.

func (FontWeights) Values 

func (i FontWeights) Values() []enums.Enum

Values returns all possible values for the type FontWeights.

type LineCaps 

type LineCaps int32 //enums:enum -trim-prefix LineCap -transform kebab

end-cap of a line: stroke-linecap property in SVG 

const (
	// LineCapButt indicates to draw no line caps; it draws a
	// line with the length of the specified length.
	LineCapButt LineCaps = iota

	// LineCapRound indicates to draw a semicircle on each line
	// end with a diameter of the stroke width.
	LineCapRound

	// LineCapSquare indicates to draw a rectangle on each line end
	// with a height of the stroke width and a width of half of the
	// stroke width.
	LineCapSquare

	// LineCapCubic is a rasterx extension
	LineCapCubic
	// LineCapQuadratic is a rasterx extension
	LineCapQuadratic
)
const LineCapsN LineCaps = 5

LineCapsN is the highest valid value for type LineCaps, plus one.

func LineCapsValues 

func LineCapsValues() []LineCaps

LineCapsValues returns all possible values for the type LineCaps.

func (LineCaps) Desc 

func (i LineCaps) Desc() string

Desc returns the description of the LineCaps value.

func (LineCaps) Int64 

func (i LineCaps) Int64() int64

Int64 returns the LineCaps value as an int64.

func (LineCaps) MarshalText 

func (i LineCaps) MarshalText() ([]byte, error)

MarshalText implements the encoding.TextMarshaler interface.

func (*LineCaps) SetInt64 

func (i *LineCaps) SetInt64(in int64)

SetInt64 sets the LineCaps value from an int64.

func (*LineCaps) SetString 

func (i *LineCaps) SetString(s string) error

SetString sets the LineCaps value from its string representation, and returns an error if the string is invalid.

func (LineCaps) String 

func (i LineCaps) String() string

String returns the string representation of this LineCaps value.

func (*LineCaps) UnmarshalText 

func (i *LineCaps) UnmarshalText(text []byte) error

UnmarshalText implements the encoding.TextUnmarshaler interface.

func (LineCaps) Values 

func (i LineCaps) Values() []enums.Enum

Values returns all possible values for the type LineCaps.

type LineJoins 

type LineJoins int32 //enums:enum -trim-prefix LineJoin -transform kebab

the way in which lines are joined together: stroke-linejoin property in SVG 

const (
	LineJoinMiter LineJoins = iota
	LineJoinMiterClip
	LineJoinRound
	LineJoinBevel
	LineJoinArcs
	// rasterx extension
	LineJoinArcsClip
)
const LineJoinsN LineJoins = 6

LineJoinsN is the highest valid value for type LineJoins, plus one.

func LineJoinsValues 

func LineJoinsValues() []LineJoins

LineJoinsValues returns all possible values for the type LineJoins.

func (LineJoins) Desc 

func (i LineJoins) Desc() string

Desc returns the description of the LineJoins value.

func (LineJoins) Int64 

func (i LineJoins) Int64() int64

Int64 returns the LineJoins value as an int64.

func (LineJoins) MarshalText 

func (i LineJoins) MarshalText() ([]byte, error)

MarshalText implements the encoding.TextMarshaler interface.

func (*LineJoins) SetInt64 

func (i *LineJoins) SetInt64(in int64)

SetInt64 sets the LineJoins value from an int64.

func (*LineJoins) SetString 

func (i *LineJoins) SetString(s string) error

SetString sets the LineJoins value from its string representation, and returns an error if the string is invalid.

func (LineJoins) String 

func (i LineJoins) String() string

String returns the string representation of this LineJoins value.

func (*LineJoins) UnmarshalText 

func (i *LineJoins) UnmarshalText(text []byte) error

UnmarshalText implements the encoding.TextUnmarshaler interface.

func (LineJoins) Values 

func (i LineJoins) Values() []enums.Enum

Values returns all possible values for the type LineJoins.

type ObjectFits 

type ObjectFits int32 //enums:enum -trim-prefix Fit -transform kebab

ObjectFits are the different ways in which a replaced element (image, video, etc) can be fit into its containing box. 

const (
	// FitFill indicates that the replaced object will fill
	// the element's entire content box, stretching if necessary.
	FitFill ObjectFits = iota

	// FitContain indicates that the replaced object will resize
	// as large as possible while fully fitting within the element's
	// content box and maintaining its aspect ratio. Therefore,
	// it may not fill the entire element.
	FitContain

	// FitCover indicates that the replaced object will fill
	// the element's entire content box, clipping if necessary.
	FitCover

	// FitNone indicates that the replaced object will not resize.
	FitNone

	// FitScaleDown indicates that the replaced object will size
	// as if [FitNone] or [FitContain] was specified, using
	// whichever will result in a smaller final size.
	FitScaleDown
)
const ObjectFitsN ObjectFits = 5

ObjectFitsN is the highest valid value for type ObjectFits, plus one.

func ObjectFitsValues 

func ObjectFitsValues() []ObjectFits

ObjectFitsValues returns all possible values for the type ObjectFits.

func (ObjectFits) Desc 

func (i ObjectFits) Desc() string

Desc returns the description of the ObjectFits value.

func (ObjectFits) Int64 

func (i ObjectFits) Int64() int64

Int64 returns the ObjectFits value as an int64.

func (ObjectFits) MarshalText 

func (i ObjectFits) MarshalText() ([]byte, error)

MarshalText implements the encoding.TextMarshaler interface.

func (*ObjectFits) SetInt64 

func (i *ObjectFits) SetInt64(in int64)

SetInt64 sets the ObjectFits value from an int64.

func (*ObjectFits) SetString 

func (i *ObjectFits) SetString(s string) error

SetString sets the ObjectFits value from its string representation, and returns an error if the string is invalid.

func (ObjectFits) String 

func (i ObjectFits) String() string

String returns the string representation of this ObjectFits value.

func (*ObjectFits) UnmarshalText 

func (i *ObjectFits) UnmarshalText(text []byte) error

UnmarshalText implements the encoding.TextUnmarshaler interface.

func (ObjectFits) Values 

func (i ObjectFits) Values() []enums.Enum

Values returns all possible values for the type ObjectFits.

type Overflows 

type Overflows int32 //enums:enum -trim-prefix Overflow -transform kebab

overflow type -- determines what happens when there is too much stuff in a layout 

const (
	// OverflowVisible makes the overflow visible, meaning that the size
	// of the container is always at least the Min size of its contents.
	// No scrollbars are shown.
	OverflowVisible Overflows = iota

	// OverflowHidden hides the overflow and doesn't present scrollbars.
	OverflowHidden

	// OverflowAuto automatically determines if scrollbars should be added to show
	// the overflow.  Scrollbars are added only if the actual content size is greater
	// than the currently available size.
	OverflowAuto

	// OverflowScroll means that scrollbars are always visible,
	// and is otherwise identical to Auto.  However, only during Viewport PrefSize call,
	// the actual content size is used -- otherwise it behaves just like Auto.
	OverflowScroll
)
const OverflowsN Overflows = 4

OverflowsN is the highest valid value for type Overflows, plus one.

func OverflowsValues 

func OverflowsValues() []Overflows

OverflowsValues returns all possible values for the type Overflows.

func (Overflows) Desc 

func (i Overflows) Desc() string

Desc returns the description of the Overflows value.

func (Overflows) Int64 

func (i Overflows) Int64() int64

Int64 returns the Overflows value as an int64.

func (Overflows) MarshalText 

func (i Overflows) MarshalText() ([]byte, error)

MarshalText implements the encoding.TextMarshaler interface.

func (*Overflows) SetInt64 

func (i *Overflows) SetInt64(in int64)

SetInt64 sets the Overflows value from an int64.

func (*Overflows) SetString 

func (i *Overflows) SetString(s string) error

SetString sets the Overflows value from its string representation, and returns an error if the string is invalid.

func (Overflows) String 

func (i Overflows) String() string

String returns the string representation of this Overflows value.

func (*Overflows) UnmarshalText 

func (i *Overflows) UnmarshalText(text []byte) error

UnmarshalText implements the encoding.TextUnmarshaler interface.

func (Overflows) Values 

func (i Overflows) Values() []enums.Enum

Values returns all possible values for the type Overflows.

type Paint 

type Paint struct {

	// prop: display:none -- node and everything below it are off, non-rendering
	Off bool

	// todo big enum of how to display item -- controls layout etc
	Display bool

	// stroke (line drawing) parameters
	StrokeStyle Stroke

	// fill (region filling) parameters
	FillStyle Fill

	// font also has global opacity setting, along with generic color, background-color settings, which can be copied into stroke / fill as needed
	FontStyle FontRender

	// TextStyle has the text styling settings.
	TextStyle Text

	// various rendering special effects settings
	VectorEffect VectorEffects

	// our additions to transform -- pushed to render state
	Transform math32.Matrix2

	// unit context -- parameters necessary for anchoring relative units
	UnitContext units.Context

	// have the styles already been set?
	StyleSet bool

	PropertiesNil bool
	// contains filtered or unexported fields
}

Paint provides the styling parameters for SVG-style rendering

func (*Paint) CopyStyleFrom 

func (pc *Paint) CopyStyleFrom(cp *Paint)

CopyStyleFrom copies styles from another paint

func (*Paint) Defaults 

func (pc *Paint) Defaults()

func (*Paint) FromStyle 

func (pc *Paint) FromStyle(st *Style)

func (*Paint) InheritFields 

func (pc *Paint) InheritFields(parent *Paint)

InheritFields from parent

func (*Paint) SetStyleProperties added in v0.0.10 

func (pc *Paint) SetStyleProperties(parent *Paint, properties map[string]any, ctxt colors.Context)

SetStyleProperties sets paint values based on given property map (name: value pairs), inheriting elements as appropriate from parent, and also having a default style for the "initial" setting

func (*Paint) SetUnitContextExt 

func (pc *Paint) SetUnitContextExt(size image.Point)

SetUnitContextExt sets the unit context for external usage of paint outside of Core Scene context, based on overall size of painting canvas. caches everything out in terms of raw pixel dots for rendering call at start of render.

func (*Paint) ToDots 

func (pc *Paint) ToDots()

ToDots runs ToDots on unit values, to compile down to raw pixels

func (*Paint) ToDotsImpl 

func (pc *Paint) ToDotsImpl(uc *units.Context)

ToDotsImpl runs ToDots on unit values, to compile down to raw pixels

type Shadow 

type Shadow struct {

	// OffsetX is th horizontal offset of the shadow.
	// Positive moves it right, negative moves it left.
	OffsetX units.Value

	// OffsetY is the vertical offset of the shadow.
	// Positive moves it down, negative moves it up.
	OffsetY units.Value

	// Blur specifies the blur radius of the shadow.
	// Higher numbers make it more blurry.
	Blur units.Value

	// Spread specifies the spread radius of the shadow.
	// Positive numbers increase the size of the shadow,
	// and negative numbers decrease the size.
	Spread units.Value

	// Color specifies the color of the shadow.
	Color image.Image

	// Inset specifies whether the shadow is inset within the
	// box instead of outset outside of the box.
	// TODO: implement.
	Inset bool
}

style parameters for shadows

func BoxShadow0 

func BoxShadow0() []Shadow

BoxShadow0 returns the shadows to be used on Elevation 0 elements. There are no shadows part of BoxShadow0, so applying it is purely semantic.

func BoxShadow1 

func BoxShadow1() []Shadow

BoxShadow1 contains the shadows to be used on Elevation 1 elements.

func BoxShadow2 

func BoxShadow2() []Shadow

BoxShadow2 returns the shadows to be used on Elevation 2 elements.

func BoxShadow3 

func BoxShadow3() []Shadow

BoxShadow3 returns the shadows to be used on Elevation 3 elements.

func BoxShadow4 

func BoxShadow4() []Shadow

BoxShadow4 returns the shadows to be used on Elevation 4 elements.

func BoxShadow5 

func BoxShadow5() []Shadow

BoxShadow5 returns the shadows to be used on Elevation 5 elements.

func (*Shadow) BasePos 

func (s *Shadow) BasePos(startPos math32.Vector2) math32.Vector2

BasePos returns the position at which the base box shadow (the actual solid, unblurred box part) should be rendered if the shadow is on an element with the given starting position.

func (*Shadow) BaseSize 

func (s *Shadow) BaseSize(startSize math32.Vector2) math32.Vector2

BaseSize returns the total size the base box shadow (the actual solid, unblurred part) should be if the shadow is on an element with the given starting size.

func (*Shadow) HasShadow 

func (s *Shadow) HasShadow() bool

func (*Shadow) Margin 

func (s *Shadow) Margin() SideFloats

Margin returns the effective margin created by the shadow on each side in terms of raw display dots. It should be added to margin for sizing considerations.

func (*Shadow) Pos 

func (s *Shadow) Pos(startPos math32.Vector2) math32.Vector2

Pos returns the position at which the blurred box shadow should start if the shadow is on an element with the given starting position.

func (*Shadow) Size 

func (s *Shadow) Size(startSize math32.Vector2) math32.Vector2

Size returns the total size occupied by the blurred box shadow if the shadow is on an element with the given starting size.

func (*Shadow) ToDots 

func (s *Shadow) ToDots(uc *units.Context)

ToDots runs ToDots on unit values, to compile down to raw pixels

type SideColors 

type SideColors struct {
	Sides[color.RGBA]
}

SideColors contains color values for each side/corner of a box

func NewSideColors 

func NewSideColors(vals ...color.RGBA) SideColors

NewSideColors is a helper that creates new side/corner colors and calls Set on them with the given values. It does not return any error values and just logs them.

func (*SideColors) SetAny 

func (s *SideColors) SetAny(a any, base color.Color) error

SetAny sets the sides/corners from the given value of any type

func (*SideColors) SetString 

func (s *SideColors) SetString(str string, base color.Color) error

SetString sets the sides/corners from the given string value

type SideFloats 

type SideFloats struct {
	Sides[float32]
}

SideFloats contains float32 values for each side/corner of a box

func BoxShadowMargin 

func BoxShadowMargin(shadows []Shadow) SideFloats

BoxShadowMargin returns the maximum effective box shadow margin of the given box shadows, calculated through Shadow.Margin.

func NewSideFloats 

func NewSideFloats(vals ...float32) SideFloats

NewSideFloats is a helper that creates new side/corner floats and calls Set on them with the given values.

func (SideFloats) Add 

func (sf SideFloats) Add(other SideFloats) SideFloats

Add adds the side floats to the other side floats and returns the result

func (SideFloats) Max 

func (sf SideFloats) Max(other SideFloats) SideFloats

Max returns a new side floats containing the maximum values of the two side floats

func (SideFloats) Min 

func (sf SideFloats) Min(other SideFloats) SideFloats

Min returns a new side floats containing the minimum values of the two side floats

func (SideFloats) MulScalar added in v0.2.1 

func (sf SideFloats) MulScalar(s float32) SideFloats

MulScalar multiplies each side by the given scalar value and returns the result.

func (SideFloats) Pos 

func (sf SideFloats) Pos() math32.Vector2

Pos returns the position offset casued by the side/corner values (Left, Top)

func (SideFloats) Round added in v0.0.4 

func (sf SideFloats) Round() SideFloats

Round returns a new side floats with each side value rounded to the nearest whole number.

func (SideFloats) Size 

func (sf SideFloats) Size() math32.Vector2

Size returns the toal size the side/corner values take up (Left + Right, Top + Bottom)

func (SideFloats) Sub 

func (sf SideFloats) Sub(other SideFloats) SideFloats

Sub subtracts the other side floats from the side floats and returns the result

func (SideFloats) ToValues 

func (sf SideFloats) ToValues() SideValues

ToValues returns the side floats a SideValues composed of units.UnitDot values

type SideIndexes 

type SideIndexes int32 //enums:enum

SideIndexes provides names for the Sides in order defined 

const (
	Top SideIndexes = iota
	Right
	Bottom
	Left
)
const SideIndexesN SideIndexes = 4

SideIndexesN is the highest valid value for type SideIndexes, plus one.

func SideIndexesValues 

func SideIndexesValues() []SideIndexes

SideIndexesValues returns all possible values for the type SideIndexes.

func (SideIndexes) Desc 

func (i SideIndexes) Desc() string

Desc returns the description of the SideIndexes value.

func (SideIndexes) Int64 

func (i SideIndexes) Int64() int64

Int64 returns the SideIndexes value as an int64.

func (SideIndexes) MarshalText 

func (i SideIndexes) MarshalText() ([]byte, error)

MarshalText implements the encoding.TextMarshaler interface.

func (*SideIndexes) SetInt64 

func (i *SideIndexes) SetInt64(in int64)

SetInt64 sets the SideIndexes value from an int64.

func (*SideIndexes) SetString 

func (i *SideIndexes) SetString(s string) error

SetString sets the SideIndexes value from its string representation, and returns an error if the string is invalid.

func (SideIndexes) String 

func (i SideIndexes) String() string

String returns the string representation of this SideIndexes value.

func (*SideIndexes) UnmarshalText 

func (i *SideIndexes) UnmarshalText(text []byte) error

UnmarshalText implements the encoding.TextUnmarshaler interface.

func (SideIndexes) Values 

func (i SideIndexes) Values() []enums.Enum

Values returns all possible values for the type SideIndexes.

type SideValues 

type SideValues struct {
	Sides[units.Value]
}

SideValues contains units.Value values for each side/corner of a box

func NewSideValues 

func NewSideValues(vals ...units.Value) SideValues

NewSideValues is a helper that creates new side/corner values and calls Set on them with the given values.

func (SideValues) Dots 

func (sv SideValues) Dots() SideFloats

Dots returns the dot values of the sides/corners as a SideFloats. It does not compute them; see ToDots for that.

func (*SideValues) ToDots 

func (sv *SideValues) ToDots(uc *units.Context) SideFloats

ToDots converts the values for each of the sides/corners to raw display pixels (dots) and sets the Dots field for each of the values. It returns the dot values as a SideFloats.

type Sides 

type Sides[T any] struct {

	// top/top-left value
	Top T

	// right/top-right value
	Right T

	// bottom/bottom-right value
	Bottom T

	// left/bottom-left value
	Left T
}

Sides contains values for each side or corner of a box. If Sides contains sides, the struct field names correspond directly to the side values (ie: Top = top side value). If Sides contains corners, the struct field names correspond to the corners as follows: Top = top left, Right = top right, Bottom = bottom right, Left = bottom left.

func NewSides 

func NewSides[T any](vals ...T) *Sides[T]

NewSides is a helper that creates new sides/corners of the given type and calls Set on them with the given values.

func (*Sides[T]) Set 

func (s *Sides[T]) Set(vals ...T) *Sides[T]

Set sets the values of the sides/corners from the given list of 0 to 4 values. If 0 values are provided, all sides/corners are set to the zero value of the type. If 1 value is provided, all sides/corners are set to that value. If 2 values are provided, the top/top-left and bottom/bottom-right are set to the first value and the right/top-right and left/bottom-left are set to the second value. If 3 values are provided, the top/top-left is set to the first value, the right/top-right and left/bottom-left are set to the second value, and the bottom/bottom-right is set to the third value. If 4 values are provided, the top/top-left is set to the first value, the right/top-right is set to the second value, the bottom/bottom-right is set to the third value, and the left/bottom-left is set to the fourth value. If more than 4 values are provided, the behavior is the same as with 4 values, but Set also logs a programmer error. This behavior is based on the CSS multi-side/corner setting syntax, like that with padding and border-radius (see https://www.w3schools.com/css/css_padding.asp and https://www.w3schools.com/cssref/css3_pr_border-radius.php)

func (*Sides[T]) SetAll 

func (s *Sides[T]) SetAll(val T) *Sides[T]

SetAll sets the values for all of the sides/corners to the given value

func (*Sides[T]) SetAny 

func (s *Sides[T]) SetAny(a any) error

SetAny sets the sides/corners from the given value of any type

func (*Sides[T]) SetBottom 

func (s *Sides[T]) SetBottom(bottom T) *Sides[T]

SetBottom sets the bottom side to the given value

func (*Sides[T]) SetHorizontal added in v0.0.10 

func (s *Sides[T]) SetHorizontal(val T) *Sides[T]

SetHorizontal sets the values for the sides/corners in the horizontal/diagonally ascending direction (right/top-right and left/bottom-left) to the given value

func (*Sides[T]) SetLeft 

func (s *Sides[T]) SetLeft(left T) *Sides[T]

SetLeft sets the left side to the given value

func (*Sides[T]) SetRight 

func (s *Sides[T]) SetRight(right T) *Sides[T]

SetRight sets the right side to the given value

func (*Sides[T]) SetString 

func (s *Sides[T]) SetString(str string) error

SetString sets the sides/corners from the given string value

func (*Sides[T]) SetTop 

func (s *Sides[T]) SetTop(top T) *Sides[T]

SetTop sets the top side to the given value

func (*Sides[T]) SetVertical added in v0.0.10 

func (s *Sides[T]) SetVertical(val T) *Sides[T]

SetVertical sets the values for the sides/corners in the vertical/diagonally descending direction (top/top-left and bottom/bottom-right) to the given value

func (*Sides[T]) Zero 

func (s *Sides[T]) Zero() *Sides[T]

Zero sets the values of all of the sides to zero.

type Stroke 

type Stroke struct {

	// stroke color image specification; stroking is off if nil
	Color image.Image

	// global alpha opacity / transparency factor between 0 and 1
	Opacity float32

	// line width
	Width units.Value

	// minimum line width used for rendering -- if width is > 0, then this is the smallest line width -- this value is NOT subject to transforms so is in absolute dot values, and is ignored if vector-effects non-scaling-stroke is used -- this is an extension of the SVG / CSS standard
	MinWidth units.Value

	// Dashes are the dashes of the stroke. Each pair of values specifies
	// the amount to paint and then the amount to skip.
	Dashes []float32

	// how to draw the end cap of lines
	Cap LineCaps

	// how to join line segments
	Join LineJoins

	// limit of how far to miter -- must be 1 or larger
	MiterLimit float32 `min:"1"`
}

Stroke contains all the properties for painting a line

func (*Stroke) ApplyBorderStyle 

func (ss *Stroke) ApplyBorderStyle(bs BorderStyles)

ApplyBorderStyle applies the given border style to the stroke style.

func (*Stroke) Defaults 

func (ss *Stroke) Defaults()

Defaults initializes default values for paint stroke

func (*Stroke) ToDots 

func (ss *Stroke) ToDots(uc *units.Context)

ToDots runs ToDots on unit values, to compile down to raw pixels

type Style 

type Style struct {

	// State holds style-relevant state flags, for convenient styling access,
	// given that styles typically depend on element states.
	State states.States

	// Abilities specifies the abilities of this element, which determine
	// which kinds of states the element can express.
	// This is used by the system/events system.  Putting this info next
	// to the State info makes it easy to configure and manage.
	Abilities abilities.Abilities

	// the cursor to switch to upon hovering over the element (inherited)
	Cursor cursors.Cursor

	// Padding is the transparent space around central content of box,
	// which is _included_ in the size of the standard box rendering.
	Padding SideValues `display:"inline"`

	// Margin is the outer-most transparent space around box element,
	// which is _excluded_ from standard box rendering.
	Margin SideValues `display:"inline"`

	// Display controls how items are displayed, in terms of layout
	Display Displays

	// Direction specifies the way in which elements are laid out, or
	// the dimension on which an element is longer / travels in.
	Direction Directions

	// Wrap causes elements to wrap around in the CrossAxis dimension
	// to fit within sizing constraints.
	Wrap bool

	// Justify specifies the distribution of elements along the main axis,
	// i.e., the same as Direction, for Flex Display.  For Grid, the main axis is
	// given by the writing direction (e.g., Row-wise for latin based languages).
	Justify AlignSet `display:"inline"`

	// Align specifies the cross-axis alignment of elements, orthogonal to the
	// main Direction axis. For Grid, the cross-axis is orthogonal to the
	// writing direction (e.g., Column-wise for latin based languages).
	Align AlignSet `display:"inline"`

	// Min is the minimum size of the actual content, exclusive of additional space
	// from padding, border, margin; 0 = default is sum of Min for all content
	// (which _includes_ space for all sub-elements).
	// This is equivalent to the Basis for the CSS flex styling model.
	Min units.XY `display:"inline"`

	// Max is the maximum size of the actual content, exclusive of additional space
	// from padding, border, margin; 0 = default provides no Max size constraint
	Max units.XY `display:"inline"`

	// Grow is the proportional amount that the element can grow (stretch)
	// if there is more space available.  0 = default = no growth.
	// Extra available space is allocated as: Grow / sum (all Grow).
	// Important: grow elements absorb available space and thus are not
	// subject to alignment (Center, End).
	Grow math32.Vector2

	// GrowWrap is a special case for Text elements where it grows initially
	// in the horizontal axis to allow for longer, word wrapped text to fill
	// the available space, but then it does not grow thereafter, so that alignment
	// operations still work (Grow elements do not align because they absorb all
	// available space). Do NOT set this for non-Text elements.
	GrowWrap bool

	// RenderBox determines whether to render the standard box model for the element.
	// This is typically necessary for most elements and helps prevent text, border,
	// and box shadow from rendering over themselves. Therefore, it should be kept at
	// its default value of true in most circumstances, but it can be set to false
	// when the element is fully managed by something that is guaranteed to render the
	// appropriate background color and/or border for the element.
	RenderBox bool

	// FillMargin determines is whether to fill the margin with
	// the surrounding background color before rendering the element itself.
	// This is typically necessary to prevent text, border, and box shadow from
	// rendering over themselves. Therefore, it should be kept at its default value
	// of true in most circumstances, but it can be set to false when the element
	// is fully managed by something that is guaranteed to render the
	// appropriate background color for the element. It is irrelevant if RenderBox
	// is false.
	FillMargin bool

	// Overflow determines how to handle overflowing content in a layout.
	// Default is OverflowVisible.  Set to OverflowAuto to enable scrollbars.
	Overflow XY[Overflows]

	// For layouts, extra space added between elements in the layout.
	Gap units.XY `display:"inline"`

	// For grid layouts, the number of columns to use.
	// If > 0, number of rows is computed as N elements / Columns.
	// Used as a constraint in layout if individual elements
	// do not specify their row, column positions
	Columns int

	// If this object is a replaced object (image, video, etc)
	// or has a background image, ObjectFit specifies the way
	// in which the replaced object should be fit into the element.
	ObjectFit ObjectFits

	// If this object is a replaced object (image, video, etc)
	// or has a background image, ObjectPosition specifies the
	// X,Y position of the object within the space allocated for
	// the object (see ObjectFit).
	ObjectPosition units.XY

	// Border is a rendered border around the element.
	Border Border

	// MaxBorder is the largest border that will ever be rendered
	// around the element, the size of which is used for computing
	// the effective margin to allocate for the element.
	MaxBorder Border

	// BoxShadow is the box shadows to render around box (can have multiple)
	BoxShadow []Shadow

	// MaxBoxShadow contains the largest shadows that will ever be rendered
	// around the element, the size of which are used for computing the
	// effective margin to allocate for the element.
	MaxBoxShadow []Shadow

	// Color specifies the text / content color, and it is inherited.
	Color image.Image

	// Background specifies the background of the element. It is not inherited,
	// and it is nil (transparent) by default.
	Background image.Image

	// alpha value between 0 and 1 to apply to the foreground and background of this element and all of its children
	Opacity float32

	// StateLayer, if above zero, indicates to create a state layer over the element with this much opacity (on a scale of 0-1) and the
	// color Color (or StateColor if it defined). It is automatically set based on State, but can be overridden in stylers.
	StateLayer float32

	// StateColor, if not nil, is the color to use for the StateLayer instead of Color. If you want to disable state layers
	// for an element, do not use this; instead, set StateLayer to 0.
	StateColor image.Image

	// ActualBackground is the computed actual background rendered for the element,
	// taking into account its Background, Opacity, StateLayer, and parent
	// ActualBackground. It is automatically computed and should not be set manually.
	ActualBackground image.Image

	// VirtualKeyboard is the virtual keyboard to display, if any,
	// on mobile platforms when this element is focused. It is not
	// used if the element is read only.
	VirtualKeyboard VirtualKeyboards

	// Pos is used for the position of the widget if the parent frame
	// has [Style.Display] = [Custom].
	Pos units.XY `display:"inline"`

	// ordering factor for rendering depth -- lower numbers rendered first.
	// Sort children according to this factor
	ZIndex int

	// specifies the row that this element should appear within a grid layout
	Row int

	// specifies the column that this element should appear within a grid layout
	Col int

	// specifies the number of sequential rows that this element should occupy
	// within a grid layout (todo: not currently supported)
	RowSpan int

	// specifies the number of sequential columns that this element should occupy
	// within a grid layout
	ColSpan int

	// ScrollbarWidth is the width of layout scrollbars. It defaults
	// to [DefaultScrollbarWidth], and it is inherited.
	ScrollbarWidth units.Value

	// font styling parameters
	Font Font

	// text styling parameters
	Text Text

	// unit context: parameters necessary for anchoring relative units
	UnitContext units.Context
}

Style contains all of the style properties used for GUI widgets. 

var StyleDefault Style

StyleDefault is default style can be used when property specifies "default"

func NewStyle 

func NewStyle() *Style

NewStyle returns a new Style object with default values.

func (*Style) AbilityIs 

func (s *Style) AbilityIs(able abilities.Abilities) bool

AbilityIs returns whether the given abilities.Abilities flag is set

func (*Style) AddBoxShadow 

func (s *Style) AddBoxShadow(shadow ...Shadow)

AddBoxShadow adds the given box shadows to the style

func (*Style) BoxShadowMargin 

func (s *Style) BoxShadowMargin() SideFloats

BoxShadowMargin returns the effective box shadow margin of the style, calculated through Shadow.Margin

func (*Style) BoxShadowToDots 

func (s *Style) BoxShadowToDots(uc *units.Context)

BoxShadowToDots runs ToDots on all box shadow unit values to compile down to raw pixels

func (*Style) BoxSpace 

func (s *Style) BoxSpace() SideFloats

BoxSpace returns the extra space around the central content in the box model in dots. It rounds all of the sides first.

func (*Style) CenterAll added in v0.1.1 

func (s *Style) CenterAll()

CenterAll sets all of the alignment properties to Center such that all children are fully centered.

func (*Style) ComputeActualBackground 

func (s *Style) ComputeActualBackground(pabg image.Image)

ComputeActualBackground sets [Style.ActualBackground] based on the given parent actual background and the properties of the style object.

func (*Style) ComputeActualBackgroundFor 

func (s *Style) ComputeActualBackgroundFor(bg, pabg image.Image) image.Image

ComputeActualBackgroundFor returns the actual background for the given background based on the given parent actual background and the properties of the style object.

func (*Style) Defaults 

func (s *Style) Defaults()

func (*Style) FontRender 

func (s *Style) FontRender() *FontRender

FontRender returns the font-rendering-related styles of the style object as a FontRender

func (*Style) HasBoxShadow 

func (s *Style) HasBoxShadow() bool

HasBoxShadow returns whether the style has any box shadows

func (*Style) InheritFields 

func (s *Style) InheritFields(parent *Style)

InheritFields from parent

func (*Style) Is 

func (s *Style) Is(st states.States) bool

Is returns whether the given states.States flag is set

func (*Style) IsFlexWrap 

func (s *Style) IsFlexWrap() bool

IsFlexWrap returns whether the style is both [Style.Wrap] and Flex.

func (*Style) IsReadOnly added in v0.3.2 

func (s *Style) IsReadOnly() bool

IsReadOnly returns whether this style object is flagged as either states.ReadOnly or states.Disabled.

func (*Style) LayoutDefaults 

func (s *Style) LayoutDefaults()

func (*Style) LayoutToDots 

func (s *Style) LayoutToDots(uc *units.Context)

ToDots runs ToDots on unit values, to compile down to raw pixels

func (*Style) MaxBoxShadowMargin 

func (s *Style) MaxBoxShadowMargin() SideFloats

MaxBoxShadowMargin returns the maximum effective box shadow margin of the style, calculated through Shadow.Margin

func (*Style) ResizeImage 

func (s *Style) ResizeImage(img image.Image, box math32.Vector2) image.Image

ResizeImage resizes the given image according to [Style.ObjectFit] in an object of the given box size.

func (*Style) SetAbilities 

func (s *Style) SetAbilities(on bool, able ...abilities.Abilities)

SetAbilities sets the given states.State flags to the given value

func (*Style) SetEnabled 

func (s *Style) SetEnabled(on bool) *Style

SetEnabled sets the Disabled State flag according to given bool

func (*Style) SetMono added in v0.1.4 

func (s *Style) SetMono(mono bool)

SetMono sets whether the font is monospace, using the SettingsFont and SettingsMonoFont pointers if possible, and falling back on "mono" and "sans-serif" otherwise.

func (*Style) SetNonSelectable 

func (s *Style) SetNonSelectable()

SetNonSelectable turns off the Selectable and DoubleClickable abilities and sets the Cursor to None.

func (*Style) SetReadOnly added in v0.1.1 

func (s *Style) SetReadOnly(ro bool)

SetReadOnly sets the states.ReadOnly flag to the given value.

func (*Style) SetState 

func (s *Style) SetState(on bool, state ...states.States) *Style

SetState sets the given states.States flags to the given value

func (*Style) SetTextWrap 

func (s *Style) SetTextWrap(wrap bool)

SetTextWrap sets the Text.WhiteSpace and GrowWrap properties in a coordinated manner. If wrap == true, then WhiteSpaceNormal and GrowWrap = true; else WhiteSpaceNowrap and GrowWrap = false, which are typically the two desired stylings.

func (*Style) StyleFromProperty added in v0.3.1 

func (s *Style) StyleFromProperty(parent *Style, key string, val any, cc colors.Context)

StyleFromProperty sets style field values based on the given property key and value

func (*Style) ToDots 

func (s *Style) ToDots()

ToDots caches all style elements in terms of raw pixel dots for rendering.

func (*Style) ToDotsImpl 

func (s *Style) ToDotsImpl(uc *units.Context)

ToDotsImpl runs ToDots on unit values, to compile down to raw pixels

func (*Style) TotalMargin 

func (s *Style) TotalMargin() SideFloats

TotalMargin returns the total effective margin of the element holding the style, using the sum of the actual margin, the max border width, and the max box shadow effective margin. If the values for the max border width / box shadow are unset, the current values are used instead, which allows for the omission of the max properties when the values do not change.

type Text 

type Text struct {

	// how to align text, horizontally (inherited).
	// This *only* applies to the text within its containing element,
	// and is typically relevant only for multi-line text:
	// for single-line text, if element does not have a specified size
	// that is different from the text size, then this has *no effect*.
	Align Aligns

	// vertical alignment of text (inherited).
	// This *only* applies to the text within its containing element:
	// if that element does not have a specified size
	// that is different from the text size, then this has *no effect*.
	AlignV Aligns

	// for svg rendering only (inherited):
	// determines the alignment relative to text position coordinate.
	// For RTL start is right, not left, and start is top for TB
	Anchor TextAnchors

	// spacing between characters and lines
	LetterSpacing units.Value

	// extra space to add between words (inherited)
	WordSpacing units.Value

	// LineHeight is the height of a line of text (inherited).
	// Text is centered within the overall line height.
	// The standard way to specify line height is in terms of
	// [units.Em] so that it scales with the font size.
	LineHeight units.Value

	// WhiteSpace (not inherited) specifies how white space is processed,
	// and how lines are wrapped.  If set to WhiteSpaceNormal (default) lines are wrapped.
	// See info about interactions with Grow.X setting for this and the NoWrap case.
	WhiteSpace WhiteSpaces

	// determines how to treat unicode bidirectional information (inherited)
	UnicodeBidi UnicodeBidi

	// bidi-override or embed -- applies to all text elements (inherited)
	Direction TextDirections

	// overall writing mode -- only for text elements, not span (inherited)
	WritingMode TextDirections

	// for TBRL writing mode (only), determines orientation of alphabetic characters (inherited);
	// 90 is default (rotated); 0 means keep upright
	OrientationVert float32

	// for horizontal LR/RL writing mode (only), determines orientation of all characters (inherited);
	// 0 is default (upright)
	OrientationHoriz float32

	// how much to indent the first line in a paragraph (inherited)
	Indent units.Value

	// extra spacing between paragraphs (inherited); copied from [Style.Margin] per CSS spec
	// if that is non-zero, else can be set directly with para-spacing
	ParaSpacing units.Value

	// tab size, in number of characters (inherited)
	TabSize int
}

Text is used for layout-level (widget, html-style) text styling -- FontStyle contains all the lower-level text rendering info used in SVG -- most of these are inherited

func (*Text) AlignFactors 

func (ts *Text) AlignFactors() (ax, ay float32)

AlignFactors gets basic text alignment factors

func (*Text) Defaults 

func (ts *Text) Defaults()

func (*Text) EffLineHeight 

func (ts *Text) EffLineHeight(fontHeight float32) float32

EffLineHeight returns the effective line height for the given font height, handling the LineHeightNormal special case.

func (*Text) HasPre 

func (ts *Text) HasPre() bool

HasPre returns true if current white space option preserves existing whitespace (or at least requires that parser in case of PreLine, which is intermediate)

func (*Text) HasWordWrap 

func (ts *Text) HasWordWrap() bool

HasWordWrap returns true if current white space option supports word wrap

func (*Text) InheritFields 

func (ts *Text) InheritFields(parent *Text)

InheritFields from parent

func (*Text) ToDots 

func (ts *Text) ToDots(uc *units.Context)

ToDots runs ToDots on unit values, to compile down to raw pixels

type TextAnchors 

type TextAnchors int32 //enums:enum -trim-prefix Anchor -transform kebab

TextAnchors are for direction of text writing, used in direction and writing-mode styles 

const (
	AnchorStart TextAnchors = iota
	AnchorMiddle
	AnchorEnd
)
const TextAnchorsN TextAnchors = 3

TextAnchorsN is the highest valid value for type TextAnchors, plus one.

func TextAnchorsValues 

func TextAnchorsValues() []TextAnchors

TextAnchorsValues returns all possible values for the type TextAnchors.

func (TextAnchors) Desc 

func (i TextAnchors) Desc() string

Desc returns the description of the TextAnchors value.

func (TextAnchors) Int64 

func (i TextAnchors) Int64() int64

Int64 returns the TextAnchors value as an int64.

func (TextAnchors) MarshalText 

func (i TextAnchors) MarshalText() ([]byte, error)

MarshalText implements the encoding.TextMarshaler interface.

func (*TextAnchors) SetInt64 

func (i *TextAnchors) SetInt64(in int64)

SetInt64 sets the TextAnchors value from an int64.

func (*TextAnchors) SetString 

func (i *TextAnchors) SetString(s string) error

SetString sets the TextAnchors value from its string representation, and returns an error if the string is invalid.

func (TextAnchors) String 

func (i TextAnchors) String() string

String returns the string representation of this TextAnchors value.

func (*TextAnchors) UnmarshalText 

func (i *TextAnchors) UnmarshalText(text []byte) error

UnmarshalText implements the encoding.TextUnmarshaler interface.

func (TextAnchors) Values 

func (i TextAnchors) Values() []enums.Enum

Values returns all possible values for the type TextAnchors.

type TextDecorations 

type TextDecorations int64 //enums:bitflag -trim-prefix Deco -transform kebab

TextDecorations are underline, line-through, etc, as bit flags that must be set using Font.SetDecoration. Also used for additional layout hints for RuneRender. 

const (
	DecoNone TextDecorations = iota

	// Underline indicates to place a line below text
	Underline

	// Overline indicates to place a line above text
	Overline

	// LineThrough indicates to place a line through text
	LineThrough

	// Blink is not currently supported (and probably a bad idea generally ;)
	DecoBlink

	// DottedUnderline is used for abbr tag -- otherwise not a standard text-decoration option afaik
	DecoDottedUnderline

	// DecoParaStart at start of a SpanRender indicates that it should be
	// styled as the start of a new paragraph and not just the start of a new
	// line
	DecoParaStart
	// DecoSuper indicates super-scripted text
	DecoSuper
	// DecoSub indicates sub-scripted text
	DecoSub
	// DecoBackgroundColor indicates that a bg color has been set -- for use in optimizing rendering
	DecoBackgroundColor
)
const TextDecorationsN TextDecorations = 10

TextDecorationsN is the highest valid value for type TextDecorations, plus one.

func TextDecorationsValues 

func TextDecorationsValues() []TextDecorations

TextDecorationsValues returns all possible values for the type TextDecorations.

func (TextDecorations) BitIndexString 

func (i TextDecorations) BitIndexString() string

BitIndexString returns the string representation of this TextDecorations value if it is a bit index value (typically an enum constant), and not an actual bit flag value.

func (TextDecorations) Desc 

func (i TextDecorations) Desc() string

Desc returns the description of the TextDecorations value.

func (*TextDecorations) HasFlag 

func (i *TextDecorations) HasFlag(f enums.BitFlag) bool

HasFlag returns whether these bit flags have the given bit flag set.

func (TextDecorations) Int64 

func (i TextDecorations) Int64() int64

Int64 returns the TextDecorations value as an int64.

func (TextDecorations) MarshalText 

func (i TextDecorations) MarshalText() ([]byte, error)

MarshalText implements the encoding.TextMarshaler interface.

func (*TextDecorations) SetFlag 

func (i *TextDecorations) SetFlag(on bool, f ...enums.BitFlag)

SetFlag sets the value of the given flags in these flags to the given value.

func (*TextDecorations) SetInt64 

func (i *TextDecorations) SetInt64(in int64)

SetInt64 sets the TextDecorations value from an int64.

func (*TextDecorations) SetString 

func (i *TextDecorations) SetString(s string) error

SetString sets the TextDecorations value from its string representation, and returns an error if the string is invalid.

func (*TextDecorations) SetStringOr 

func (i *TextDecorations) SetStringOr(s string) error

SetStringOr sets the TextDecorations value from its string representation while preserving any bit flags already set, and returns an error if the string is invalid.

func (TextDecorations) String 

func (i TextDecorations) String() string

String returns the string representation of this TextDecorations value.

func (*TextDecorations) UnmarshalText 

func (i *TextDecorations) UnmarshalText(text []byte) error

UnmarshalText implements the encoding.TextUnmarshaler interface.

func (TextDecorations) Values 

func (i TextDecorations) Values() []enums.Enum

Values returns all possible values for the type TextDecorations.

type TextDirections 

type TextDirections int32 //enums:enum -transform lower

TextDirections are for direction of text writing, used in direction and writing-mode styles 

const (
	LRTB TextDirections = iota
	RLTB
	TBRL
	LR
	RL
	TB
	LTR
	RTL
)
const TextDirectionsN TextDirections = 8

TextDirectionsN is the highest valid value for type TextDirections, plus one.

func TextDirectionsValues 

func TextDirectionsValues() []TextDirections

TextDirectionsValues returns all possible values for the type TextDirections.

func (TextDirections) Desc 

func (i TextDirections) Desc() string

Desc returns the description of the TextDirections value.

func (TextDirections) Int64 

func (i TextDirections) Int64() int64

Int64 returns the TextDirections value as an int64.

func (TextDirections) MarshalText 

func (i TextDirections) MarshalText() ([]byte, error)

MarshalText implements the encoding.TextMarshaler interface.

func (*TextDirections) SetInt64 

func (i *TextDirections) SetInt64(in int64)

SetInt64 sets the TextDirections value from an int64.

func (*TextDirections) SetString 

func (i *TextDirections) SetString(s string) error

SetString sets the TextDirections value from its string representation, and returns an error if the string is invalid.

func (TextDirections) String 

func (i TextDirections) String() string

String returns the string representation of this TextDirections value.

func (*TextDirections) UnmarshalText 

func (i *TextDirections) UnmarshalText(text []byte) error

UnmarshalText implements the encoding.TextUnmarshaler interface.

func (TextDirections) Values 

func (i TextDirections) Values() []enums.Enum

Values returns all possible values for the type TextDirections.

type UnicodeBidi 

type UnicodeBidi int32 //enums:enum -trim-prefix Bidi -transform kebab

UnicodeBidi determines the type of bidirectional text support. See https://pkg.go.dev/golang.org/x/text/unicode/bidi. 

const (
	BidiNormal UnicodeBidi = iota
	BidiEmbed
	BidiBidiOverride
)
const UnicodeBidiN UnicodeBidi = 3

UnicodeBidiN is the highest valid value for type UnicodeBidi, plus one.

func UnicodeBidiValues 

func UnicodeBidiValues() []UnicodeBidi

UnicodeBidiValues returns all possible values for the type UnicodeBidi.

func (UnicodeBidi) Desc 

func (i UnicodeBidi) Desc() string

Desc returns the description of the UnicodeBidi value.

func (UnicodeBidi) Int64 

func (i UnicodeBidi) Int64() int64

Int64 returns the UnicodeBidi value as an int64.

func (UnicodeBidi) MarshalText 

func (i UnicodeBidi) MarshalText() ([]byte, error)

MarshalText implements the encoding.TextMarshaler interface.

func (*UnicodeBidi) SetInt64 

func (i *UnicodeBidi) SetInt64(in int64)

SetInt64 sets the UnicodeBidi value from an int64.

func (*UnicodeBidi) SetString 

func (i *UnicodeBidi) SetString(s string) error

SetString sets the UnicodeBidi value from its string representation, and returns an error if the string is invalid.

func (UnicodeBidi) String 

func (i UnicodeBidi) String() string

String returns the string representation of this UnicodeBidi value.

func (*UnicodeBidi) UnmarshalText 

func (i *UnicodeBidi) UnmarshalText(text []byte) error

UnmarshalText implements the encoding.TextUnmarshaler interface.

func (UnicodeBidi) Values 

func (i UnicodeBidi) Values() []enums.Enum

Values returns all possible values for the type UnicodeBidi.

type VectorEffects 

type VectorEffects int32 //enums:enum -trim-prefix VectorEffect -transform kebab

VectorEffects contains special effects for rendering 

const (
	VectorEffectNone VectorEffects = iota

	// VectorEffectNonScalingStroke means that the stroke width is not affected by
	// transform properties
	VectorEffectNonScalingStroke
)
const VectorEffectsN VectorEffects = 2

VectorEffectsN is the highest valid value for type VectorEffects, plus one.

func VectorEffectsValues 

func VectorEffectsValues() []VectorEffects

VectorEffectsValues returns all possible values for the type VectorEffects.

func (VectorEffects) Desc 

func (i VectorEffects) Desc() string

Desc returns the description of the VectorEffects value.

func (VectorEffects) Int64 

func (i VectorEffects) Int64() int64

Int64 returns the VectorEffects value as an int64.

func (VectorEffects) MarshalText 

func (i VectorEffects) MarshalText() ([]byte, error)

MarshalText implements the encoding.TextMarshaler interface.

func (*VectorEffects) SetInt64 

func (i *VectorEffects) SetInt64(in int64)

SetInt64 sets the VectorEffects value from an int64.

func (*VectorEffects) SetString 

func (i *VectorEffects) SetString(s string) error

SetString sets the VectorEffects value from its string representation, and returns an error if the string is invalid.

func (VectorEffects) String 

func (i VectorEffects) String() string

String returns the string representation of this VectorEffects value.

func (*VectorEffects) UnmarshalText 

func (i *VectorEffects) UnmarshalText(text []byte) error

UnmarshalText implements the encoding.TextUnmarshaler interface.

func (VectorEffects) Values 

func (i VectorEffects) Values() []enums.Enum

Values returns all possible values for the type VectorEffects.

type VirtualKeyboards added in v0.0.6 

type VirtualKeyboards int32 //enums:enum -trim-prefix Keyboard -transform kebab

VirtualKeyboards are all of the supported virtual keyboard types to display on mobile platforms. 

const (
	// KeyboardNone indicates to display no virtual keyboard.
	KeyboardNone VirtualKeyboards = iota

	// KeyboardSingleLine indicates to display a virtual keyboard
	// with a default input style and a "Done" return key.
	KeyboardSingleLine

	// KeyboardMultiLine indicates to display a virtual keyboard
	// with a default input style and a "Return" return key.
	KeyboardMultiLine

	// KeyboardNumber indicates to display a virtual keyboard
	// for inputting a number.
	KeyboardNumber

	// KeyboardPassword indicates to display a virtual keyboard
	// for inputting a password.
	KeyboardPassword

	// KeyboardEmail indicates to display a virtual keyboard
	// for inputting an email address.
	KeyboardEmail

	// KeyboardPhone indicates to display a virtual keyboard
	// for inputting a phone number.
	KeyboardPhone

	// KeyboardURL indicates to display a virtual keyboard for
	// inputting a URL / URI / web address.
	KeyboardURL
)
const VirtualKeyboardsN VirtualKeyboards = 8

VirtualKeyboardsN is the highest valid value for type VirtualKeyboards, plus one.

func VirtualKeyboardsValues added in v0.0.6 

func VirtualKeyboardsValues() []VirtualKeyboards

VirtualKeyboardsValues returns all possible values for the type VirtualKeyboards.

func (VirtualKeyboards) Desc added in v0.0.6 

func (i VirtualKeyboards) Desc() string

Desc returns the description of the VirtualKeyboards value.

func (VirtualKeyboards) Int64 added in v0.0.6 

func (i VirtualKeyboards) Int64() int64

Int64 returns the VirtualKeyboards value as an int64.

func (VirtualKeyboards) MarshalText added in v0.0.6 

func (i VirtualKeyboards) MarshalText() ([]byte, error)

MarshalText implements the encoding.TextMarshaler interface.

func (*VirtualKeyboards) SetInt64 added in v0.0.6 

func (i *VirtualKeyboards) SetInt64(in int64)

SetInt64 sets the VirtualKeyboards value from an int64.

func (*VirtualKeyboards) SetString added in v0.0.6 

func (i *VirtualKeyboards) SetString(s string) error

SetString sets the VirtualKeyboards value from its string representation, and returns an error if the string is invalid.

func (VirtualKeyboards) String added in v0.0.6 

func (i VirtualKeyboards) String() string

String returns the string representation of this VirtualKeyboards value.

func (*VirtualKeyboards) UnmarshalText added in v0.0.6 

func (i *VirtualKeyboards) UnmarshalText(text []byte) error

UnmarshalText implements the encoding.TextUnmarshaler interface.

func (VirtualKeyboards) Values added in v0.0.6 

func (i VirtualKeyboards) Values() []enums.Enum

Values returns all possible values for the type VirtualKeyboards.

type WhiteSpaces 

type WhiteSpaces int32 //enums:enum -trim-prefix WhiteSpace

WhiteSpaces determine how white space is processed 

const (
	// WhiteSpaceNormal means that all white space is collapsed to a single
	// space, and text wraps when necessary.  To get full word wrapping to
	// expand to all available space, you also need to set GrowWrap = true.
	// Use the SetTextWrap convenience method to set both.
	WhiteSpaceNormal WhiteSpaces = iota

	// WhiteSpaceNowrap means that sequences of whitespace will collapse into
	// a single whitespace. Text will never wrap to the next line except
	// if there is an explicit line break via a <br> tag.  In general you
	// also don't want simple non-wrapping text labels to Grow (GrowWrap = false).
	// Use the SetTextWrap method to set both.
	WhiteSpaceNowrap

	// WhiteSpacePre means that whitespace is preserved. Text
	// will only wrap on line breaks. Acts like the <pre> tag in HTML.  This
	// invokes a different hand-written parser because the default Go
	// parser automatically throws away whitespace.
	WhiteSpacePre

	// WhiteSpacePreLine means that sequences of whitespace will collapse
	// into a single whitespace. Text will wrap when necessary, and on line
	// breaks
	WhiteSpacePreLine

	// WhiteSpacePreWrap means that whitespace is preserved.
	// Text will wrap when necessary, and on line breaks
	WhiteSpacePreWrap
)
const WhiteSpacesN WhiteSpaces = 5

WhiteSpacesN is the highest valid value for type WhiteSpaces, plus one.

func WhiteSpacesValues 

func WhiteSpacesValues() []WhiteSpaces

WhiteSpacesValues returns all possible values for the type WhiteSpaces.

func (WhiteSpaces) Desc 

func (i WhiteSpaces) Desc() string

Desc returns the description of the WhiteSpaces value.

func (WhiteSpaces) Int64 

func (i WhiteSpaces) Int64() int64

Int64 returns the WhiteSpaces value as an int64.

func (WhiteSpaces) MarshalText 

func (i WhiteSpaces) MarshalText() ([]byte, error)

MarshalText implements the encoding.TextMarshaler interface.

func (*WhiteSpaces) SetInt64 

func (i *WhiteSpaces) SetInt64(in int64)

SetInt64 sets the WhiteSpaces value from an int64.

func (*WhiteSpaces) SetString 

func (i *WhiteSpaces) SetString(s string) error

SetString sets the WhiteSpaces value from its string representation, and returns an error if the string is invalid.

func (WhiteSpaces) String 

func (i WhiteSpaces) String() string

String returns the string representation of this WhiteSpaces value.

func (*WhiteSpaces) UnmarshalText 

func (i *WhiteSpaces) UnmarshalText(text []byte) error

UnmarshalText implements the encoding.TextUnmarshaler interface.

func (WhiteSpaces) Values 

func (i WhiteSpaces) Values() []enums.Enum

Values returns all possible values for the type WhiteSpaces.

type XY 

type XY[T any] struct {
	// X is the horizontal axis value
	X T

	// Y is the vertical axis value
	Y T
}

XY represents X,Y values

func (*XY[T]) Dim 

func (xy *XY[T]) Dim(d math32.Dims) T

return the value for given dimension

func (*XY[T]) Set 

func (xy *XY[T]) Set(v ...T)

Set sets the X, Y values according to the given values. no values: set to 0. 1 value: set both to that value. 2 values, set X, Y to the two values respectively.

func (*XY[T]) SetDim 

func (xy *XY[T]) SetDim(d math32.Dims, val T)

set the value for given dimension

func (*XY[T]) String 

func (xy *XY[T]) String() string

String implements the fmt.Stringer interface.

Source Files

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Directories

Path Synopsis
Package Units supports full range of CSS-style length units (em, px, dp, etc)
 Package Units supports full range of CSS-style length units (em, px, dp, etc)

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