gui

package
v0.0.0-...-e1c21c9 Latest Latest
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 Go to latest Published: May 10, 2019 License: Zlib Imports: 9 Imported by: 0

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Index

Constants

View Source 
const (
	FlagCornerNone        FlagCorner = 0x0000
	FlagCornerTopLeft                = 0x0001
	FlagCornerTopRight               = 0x0002
	FlagCornerBottomRight            = 0x0004
	FlagCornerBottomLeft             = 0x0008
	FlagCornerAll                    = 0x000F
)
View Source 
const (
	AlignCenter Align = iota
	AlignLeft         = 1 << iota
	AlignRight        = 1 << iota
	AlignTop          = 1 << iota
	AlignBottom       = 1 << iota
)
View Source 
const (
	DefaultZOrder = int16(0xFFFF>>1 - 100)
)
View Source 
const EventNone = EventType(0)

Variables

View Source 
var DebugDraw = false

Functions

func CheckBox 

func CheckBox(id ID, bb Rect, text string, style *CheckBoxStyle) bool

func ColorRect 

func ColorRect(bb Rect, fill gfx.Color, rounding float32)

Widget: ColorRect

func Game2Gui 

func Game2Gui(x, y float32) (x1, y1 float32)

func Gui2Game 

func Gui2Game(x, y float32) (x1, y1 float32)

func HintAndScale 

func HintAndScale() (hintx, hinty, skx, sky float32)

func Image 

func Image(id ID, bb Rect, tex gfx.Tex2D, style *ImageStyle)

Widget: Image

func InputText 

func InputText(id ID, bb Rect, hint string, style *InputStyle)

Widgets: InputEditor

func ListView 

func ListView()

Widget: ListView TODO

func Move 

func Move(x, y float32)

Move sets the ui coordinate's origin to (x, y)

func Offset 

func Offset(dx, dy float32)

Offset move the ui coordinate's origin by (dx, dy)

func ProgressBar 

func ProgressBar(id ID, bb Rect, fraction float32, style *ProgressBarStyle)

Widget: ProgressBar, Slider

func ScreenSize 

func ScreenSize() (w, h float32)

ScreenSize return the physical width&height of the screen.

func SetFont 

func SetFont(font font.Font)

func SetScreenSize 

func SetScreenSize(w, h float32)

for internal usage, DO NOT call.

func SetVirtualResolution 

func SetVirtualResolution(w, h float32)

SetVirtualResolution set the virtual resolution.

func SetZOrder 

func SetZOrder(z int16) (old int16)

Set Z-Order for

func Text 

func Text(id ID, bb Rect, text string, style *TextStyle)

Widgets: Text

func TextSizeColored 

func TextSizeColored(id ID, bb Rect, text string, color gfx.Color, size float32)

func UseTheme 

func UseTheme(style *Theme)

Theme:

func VirtualSize 

func VirtualSize() (w, h float32)

Types

type Align 

type Align uint32

type ButtonStyle 

type ButtonStyle struct {
	TextStyle
	Padding
	Background struct {
		Normal  gfx.Color
		Pressed gfx.Color
	}
	Gravity  f32.Vec2
	Rounding float32
}

type CheckBoxStyle 

type CheckBoxStyle struct {
}

type Context 

type Context struct {
	DrawList
	*Theme
	Cursor
	// contains filtered or unexported fields
}

一个Context维护UI层逻辑: 1. 一个 DrawList，负责生成顶点 2. 共享的 Theme，指针引用，多个 Context 之间可以共享 3. State 维护，负责维护当前的 UI 状态，比如动画，按钮，列表... 窗口在 Context 之上维护，默认的Context可以随意的绘制 在窗口内绘制的UI会受到窗口的管理.

func DefaultContext 

func DefaultContext() *Context

func NewContext 

func NewContext(style *Theme) *Context

func (*Context) Button 

func (ctx *Context) Button(id ID, bb *Rect, text string, style *ButtonStyle) (event EventType)

Widget: Button

func (*Context) CalcTextSize 

func (ctx *Context) CalcTextSize(text string, wrapWidth float32, fnt font.Font, fontSize float32) f32.Vec2

func (*Context) CheckSlider 

func (ctx *Context) CheckSlider(id ID, bound *Rect) (v float32, e EventType)

func (*Context) ClickEvent 

func (ctx *Context) ClickEvent(id ID, rect *Rect) EventType

func (*Context) ColorBackground 

func (ctx *Context) ColorBackground(event EventType, bb *Rect, normal, pressed gfx.Color, round float32)

偷师 flat-ui 中的设计，把空间的前景和背景分离，背景单独根据事件来变化.. 在 Android 中，Widget的前景和背景都可以根据控件状态发生变化 但是在大部分UI中，比如 Text/Image 只会改变背景的状态 偷懒的自定义UI，不做任何状态的改变... 所以说呢, 我们也采用偷懒的做法呗。。

func (*Context) DraggingEvent 

func (ctx *Context) DraggingEvent(id ID, bound *Rect) EventType

func (*Context) DrawBorder 

func (ctx *Context) DrawBorder(bb *Rect, color uint32, round, thick float32)

func (*Context) DrawCircle 

func (ctx *Context) DrawCircle(x, y, radius float32, fill gfx.Color)

default segment = 12 TODO, circle scale factor

func (*Context) DrawCircleNoneFill 

func (ctx *Context) DrawCircleNoneFill(x, y, radius float32, strokeColor gfx.Color, segment int, thickness float32)

segment default=12

func (*Context) DrawDebugBorder 

func (ctx *Context) DrawDebugBorder(x, y, w, h float32, color uint32)

func (*Context) DrawGradient 

func (ctx *Context) DrawGradient(bb Rect, c0, c1 gfx.Color, vertical bool)

func (*Context) DrawImage 

func (ctx *Context) DrawImage(bound *Rect, tex gfx.Tex2D, style *ImageStyle)

func (*Context) DrawQuad 

func (ctx *Context) DrawQuad(vertex [4]f32.Vec2, fill gfx.Color)

func (*Context) DrawRect 

func (ctx *Context) DrawRect(bb *Rect, fill gfx.Color, round float32)

func (*Context) DrawText 

func (ctx *Context) DrawText(bb *Rect, text string, style *TextStyle) (size f32.Vec2)

绘制元素, bb 存储相对于父容器的相对坐标..

func (*Context) EndScroll 

func (ctx *Context) EndScroll()

func (*Context) Image 

func (ctx *Context) Image(id ID, bb *Rect, tex gfx.Tex2D, style *ImageStyle)

Widget: Image

func (*Context) ImageBackground 

func (ctx *Context) ImageBackground(eventType EventType)

func (*Context) ImageButton 

func (ctx *Context) ImageButton(id ID, normal, pressed gfx.Tex2D, bb *Rect, style *ImageButtonStyle) (event EventType)

func (*Context) InputText 

func (ctx *Context) InputText(id ID, bb *Rect, hint string, style *InputStyle)

Widgets: InputEditor

func (*Context) PushClipRect 

func (ctx *Context) PushClipRect(minClip, maxClip f32.Vec2, intersectCurrent bool)

Clip:

func (*Context) Slider 

func (ctx *Context) Slider(id ID, bb *Rect, value *float32, style *SliderStyle) (e EventType)

func (*Context) StartScroll 

func (ctx *Context) StartScroll(size, offset f32.Vec2)

Scroll 效果的关键是使用裁切限制滚动区域，然后 通过计算拖拽，来得到争取的偏移

func (*Context) Text 

func (ctx *Context) Text(id ID, bb *Rect, text string, style *TextStyle)

func (*Context) UseTheme 

func (ctx *Context) UseTheme(style *Theme)

Theme:

type Cursor 

type Cursor struct {
	X, Y float32
}

type DrawCmd 

type DrawCmd struct {
	FirstIndex uint16
	ElemCount  uint16
	ClipRect   f32.Vec4
	TextureId  uint16
	// contains filtered or unexported fields
}

DrawList provide method to write primitives to buffer

type DrawIdx 

type DrawIdx uint16

type DrawList 

type DrawList struct {
	CmdBuffer []DrawCmd
	IdxBuffer []DrawIdx
	VtxBuffer []DrawVert

	// Data *DrawListSharedData
	OwnerName     string // 窗口名
	VtxCurrentIdx int    // VtxBuffer.Size

	// 指向当前正在使用的 cmdbuffer 的位置
	VtxWriter []DrawVert
	IdxWriter []DrawIdx

	ClipRectStack  []f32.Vec4
	TextureIdStack []uint16

	FullScreen      f32.Vec4
	TexUVWhitePixel f32.Vec2
	CircleVtx12     [12]f32.Vec2
	Font            font.Font
	FontSize        float32

	Flags  DrawListFlags
	ZOrder int16
	// contains filtered or unexported fields
}

func NewDrawList 

func NewDrawList() *DrawList

func (*DrawList) AddBezierCurve 

func (dl *DrawList) AddBezierCurve(pos0 f32.Vec2, cp0, cp1 f32.Vec2, pos1 f32.Vec2,
	color uint32, thickness float32, segments int)

func (*DrawList) AddCircle 

func (dl *DrawList) AddCircle(centre f32.Vec2, radius float32, color uint32, segments int, thickness float32)

func (*DrawList) AddCircleFilled 

func (dl *DrawList) AddCircleFilled(centre f32.Vec2, radius float32, color uint32, segments int)

func (*DrawList) AddCommand 

func (dl *DrawList) AddCommand(elemCount int)

每次绘制都会产生一个 Command （可能会造成内存浪费! 1k cmd = 1000 * 6 * 4 = 24k） 为了减少内存可以一边添加一边尝试向前合并

func (*DrawList) AddConvexPolyFilled 

func (dl *DrawList) AddConvexPolyFilled(points []f32.Vec2, color uint32)

Non Anti-aliased Fill

func (*DrawList) AddImage 

func (dl *DrawList) AddImage(texId uint16, a, b f32.Vec2, uva, uvb f32.Vec2, color uint32)

func (*DrawList) AddImageNinePatch 

func (dl *DrawList) AddImageNinePatch(texId uint16, min, max f32.Vec2, uva, uvb f32.Vec2, patch f32.Vec4, color uint32)

NinePatch Algorithm 

12   13   14   15
     x1   x2     max
+----+----+----+
|    |    |    |
|    |    |p1  |
+----+----+----+ y2
|    |    |    |
|    |p0  |    |
+----+----+----+ y1
|    |    |    |
|    |    |    |
+----+----+----+

min 

0    1    2    3

patch = {x1, x2, y1, y2} % TextureSize

func (*DrawList) AddImageQuad 

func (dl *DrawList) AddImageQuad(texId uint16, a, b, c, d f32.Vec2, uva, uvb, uvc, uvd f32.Vec2, color uint32)

func (*DrawList) AddImageRound 

func (dl *DrawList) AddImageRound(texId uint16, a, b f32.Vec2, uva, uvb f32.Vec2, color uint32, rounding float32, corners FlagCorner)

func (*DrawList) AddLine 

func (dl *DrawList) AddLine(a, b f32.Vec2, color uint32, thickness float32)

func (*DrawList) AddPolyLine 

func (dl *DrawList) AddPolyLine(points []f32.Vec2, color uint32, thickness float32, closed bool)

此处生成最终的顶点数据和索引数据 当前并不支持抗锯齿！！简单的用顶点生成线段

func (*DrawList) AddQuad 

func (dl *DrawList) AddQuad(a, b, c, d f32.Vec2, color uint32, thickness float32)

func (*DrawList) AddQuadFilled 

func (dl *DrawList) AddQuadFilled(a, b, c, d f32.Vec2, color uint32)

func (*DrawList) AddRect 

func (dl *DrawList) AddRect(a, b f32.Vec2, color uint32, rounding float32, roundFlags FlagCorner, thickness float32)

所有非填充图形看来都是使用路径实现的

func (*DrawList) AddRectFilled 

func (dl *DrawList) AddRectFilled(min, max f32.Vec2, color uint32, rounding float32, corner FlagCorner)

func (*DrawList) AddRectFilledMultiColor 

func (dl *DrawList) AddRectFilledMultiColor()

func (*DrawList) AddText 

func (dl *DrawList) AddText(pos f32.Vec2, text string, font font.Font, fontSize float32, color uint32, wrapWidth float32) (size f32.Vec2)

func (*DrawList) AddTriangle 

func (dl *DrawList) AddTriangle(a, b, c f32.Vec2, color uint32, thickness float32)

func (*DrawList) AddTriangleFilled 

func (dl *DrawList) AddTriangleFilled(a, b, c f32.Vec2, color uint32)

func (*DrawList) Clear 

func (dl *DrawList) Clear()

TODO

func (*DrawList) Commands 

func (dl *DrawList) Commands() []DrawCmd

func (*DrawList) CurrentClipRect 

func (dl *DrawList) CurrentClipRect() (clip f32.Vec4)

func (*DrawList) CurrentTextureId 

func (dl *DrawList) CurrentTextureId() (id uint16)

func (*DrawList) Empty 

func (dl *DrawList) Empty() bool

func (*DrawList) GetClipRectMax 

func (dl *DrawList) GetClipRectMax() f32.Vec2

func (*DrawList) GetClipRectMin 

func (dl *DrawList) GetClipRectMin() f32.Vec2

func (*DrawList) Initialize 

func (dl *DrawList) Initialize()

func (*DrawList) PathArcTo 

func (dl *DrawList) PathArcTo(centre f32.Vec2, radius float32, min, max float32, segments int)

func (*DrawList) PathArcToFast 

func (dl *DrawList) PathArcToFast(centre f32.Vec2, radius float32, min12, max12 int)

此处圆角的算法： 使用一个12边形近似圆形，采用中心放射算法，计算出 各个角度的sin/cos, 然后通过公式，得到圆圆形顶点 f(x) = centre.x + cos()*radius f(y) = centre.y + sin()*radius 以上, 可以提前算好 sin/cos 加速整个过程

func (*DrawList) PathBezierCurveTo 

func (dl *DrawList) PathBezierCurveTo(p2, p3, p4 f32.Vec2, segments int)

func (*DrawList) PathClear 

func (dl *DrawList) PathClear()

func (*DrawList) PathFillConvex 

func (dl *DrawList) PathFillConvex(col uint32)

func (*DrawList) PathLineTo 

func (dl *DrawList) PathLineTo(pos f32.Vec2)

func (*DrawList) PathLineToMergeDuplicate 

func (dl *DrawList) PathLineToMergeDuplicate(pos f32.Vec2)

func (*DrawList) PathRect 

func (dl *DrawList) PathRect(a, b f32.Vec2, rounding float32, corners FlagCorner)

func (*DrawList) PathStroke 

func (dl *DrawList) PathStroke(color uint32, thickness float32, closed bool)

default: thickness=1.0

func (*DrawList) PopClipRect 

func (dl *DrawList) PopClipRect()

func (*DrawList) PopTextureId 

func (dl *DrawList) PopTextureId()

func (*DrawList) PrimQuadUV 

func (dl *DrawList) PrimQuadUV(a, b, c, d f32.Vec2, uva, uvb, uvc, uvd f32.Vec2, color uint32)

func (*DrawList) PrimRect 

func (dl *DrawList) PrimRect(min, max f32.Vec2, color uint32)

func (*DrawList) PrimRectUV 

func (dl *DrawList) PrimRectUV(a, c f32.Vec2, uva, uvc f32.Vec2, color uint32)

func (*DrawList) PrimReserve 

func (dl *DrawList) PrimReserve(idxCount, vtxCount int)

primitive operation, auto scale by 1024

func (*DrawList) PushClipRect 

func (dl *DrawList) PushClipRect(min, max f32.Vec2, intersectCurrentClip bool)

Clip 相关的操作

func (*DrawList) PushClipRectFullScreen 

func (dl *DrawList) PushClipRectFullScreen()

func (*DrawList) PushTextureId 

func (dl *DrawList) PushTextureId(texId uint16)

func (*DrawList) Size 

func (dl *DrawList) Size() (idx, vdx int)

func (*DrawList) UpdateClipRect 

func (dl *DrawList) UpdateClipRect()

will result in new draw-call

func (*DrawList) UpdateTextureId 

func (dl *DrawList) UpdateTextureId()

type DrawListFlags 

type DrawListFlags uint32
const (
	FlagAntiAliasedLine DrawListFlags = iota
	FlagAntiAliasedFill
)

type DrawVert 

type DrawVert struct {
	// contains filtered or unexported fields
}

type EventType 

type EventType uint8
const (
	EventWentDown EventType = 1 << iota
	EventWentUp
	EventDown
	EventStartDrag
	EventEndDrag
	EventDragging
)

func Button 

func Button(id ID, bb Rect, text string, style *ButtonStyle) (event EventType)

Widget: Button

func ImageButton 

func ImageButton(id ID, bb Rect, normal, pressed gfx.Tex2D, style *ImageButtonStyle) EventType

func Slider 

func Slider(id ID, bb Rect, value *float32, style *SliderStyle) (v EventType)

func (EventType) Down 

func (et EventType) Down() bool

func (EventType) Dragging 

func (et EventType) Dragging() bool

func (EventType) EndDrag 

func (et EventType) EndDrag() bool

func (EventType) JustPressed 

func (et EventType) JustPressed() bool

func (EventType) JustReleased 

func (et EventType) JustReleased() bool

func (EventType) StartDrag 

func (et EventType) StartDrag() bool

type FlagCorner 

type FlagCorner uint32

Rounding corner: A: 0x0000 0001 top-left B: 0x0000 0002 top-right C: 0x0000 0004 down-right D: 0x0000 0008 down-left

type FontRender 

type FontRender struct {
	*DrawList
	// contains filtered or unexported fields
}

工具结构，负责把字符串转化为顶点.. 拥有所有需要的条件属性

func (*FontRender) RenderText 

func (fr *FontRender) RenderText(pos f32.Vec2, text string) (size f32.Vec2)

当前的实现中，不考虑裁切优化，全部绘制所有字符

func (*FontRender) RenderWrapped 

func (fr *FontRender) RenderWrapped(pos f32.Vec2, text string, wrapWidth float32) (size f32.Vec2)

type ID 

type ID int

每个控件都需要手动传入一个 Id

func GenID 

func GenID(name string) ID

返回一个 Id

type IdMap 

type IdMap map[string]ID

type ImageButtonStyle 

type ImageButtonStyle struct {
	ImageStyle
	Padding
}

type ImageStyle 

type ImageStyle struct {
	Tint gfx.Color
}

type InputStyle 

type InputStyle struct {
	Visibility
	Color, HintColor uint32
	Size             float32
}

type Padding 

type Padding struct {
	Left, Right, Top, Bottom float32
}

type ProgressBarStyle 

type ProgressBarStyle struct {
}

type Rect 

type Rect struct {
	X, Y float32
	W, H float32
}

UI绘制边界

func (*Rect) InRange 

func (r *Rect) InRange(p f32.Vec2) bool

func (*Rect) Offset 

func (r *Rect) Offset(dx, dy float32) *Rect

func (*Rect) Scale 

func (r *Rect) Scale(skx, sky float32) *Rect

type SliderStyle 

type SliderStyle struct {
	Bar, Knob gfx.Color
}

type TextStyle 

type TextStyle struct {
	Font      font.Font
	Color     gfx.Color
	Size      float32
	Lines     int
	LineSpace float32
}

func (*TextStyle) SetColor 

func (text *TextStyle) SetColor(color gfx.Color) *TextStyle

func (*TextStyle) SetFont 

func (text *TextStyle) SetFont(f font.Font) *TextStyle

func (*TextStyle) SetSize 

func (text *TextStyle) SetSize(size float32) *TextStyle

type Theme 

type Theme struct {
	Text        TextStyle
	Button      ButtonStyle
	Image       ImageStyle
	ImageButton ImageButtonStyle
	Slider      SliderStyle

	// global config..
	Normal  gfx.Color
	Pressed gfx.Color
	// item 之间的空隙
	Spacing float32

	// default font
	font.Font
}
var ThemeDark *Theme
var ThemeLight *Theme

type UIRenderFeature 

type UIRenderFeature struct {
	*gfx.MeshRender
	*DrawList
	*gfx.Camera

	Buffer struct {
		// contains filtered or unexported fields
	}
	// contains filtered or unexported fields
}

func (*UIRenderFeature) Draw 

func (f *UIRenderFeature) Draw(nodes gfx.RenderNodes)

TODO rotation..

func (*UIRenderFeature) Extract 

func (f *UIRenderFeature) Extract(v *gfx.View)

func (*UIRenderFeature) Flush 

func (f *UIRenderFeature) Flush()

func (*UIRenderFeature) Register 

func (f *UIRenderFeature) Register(rs *gfx.RenderSystem)

func (*UIRenderFeature) SetDrawList 

func (f *UIRenderFeature) SetDrawList(dl *DrawList)

type Visibility 

type Visibility uint8
const (
	Visible Visibility = iota
	InVisible
	Gone
)

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