widget

package
v2.4.1 Latest Latest
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 Go to latest Published: Oct 9, 2023 License: BSD-3-Clause Imports: 7 Imported by: 0

Documentation

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func Repaint added in v2.3.4 

func Repaint(obj fyne.CanvasObject)

Repaint instructs the containing canvas to redraw, even if nothing changed. This method is a duplicate of what is in `canvas/canvas.go` to avoid a dependency loop or public API.

Types

type Base 

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

Base provides a helper that handles basic widget behaviours.

func (*Base) ExtendBaseWidget added in v2.1.0 

func (w *Base) ExtendBaseWidget(wid fyne.Widget)

ExtendBaseWidget is used by an extending widget to make use of BaseWidget functionality.

func (*Base) Hide added in v2.1.0 

func (w *Base) Hide()

Hide this widget so it is no longer visible

func (*Base) MinSize added in v2.1.0 

func (w *Base) MinSize() fyne.Size

MinSize for the widget - it should never be resized below this value.

func (*Base) Move added in v2.1.0 

func (w *Base) Move(pos fyne.Position)

Move the widget to a new position, relative to its parent. Note this should not be used if the widget is being managed by a Layout within a Container.

func (*Base) Position 

func (w *Base) Position() fyne.Position

Position gets the current position of this widget, relative to its parent.

func (*Base) Refresh added in v2.1.0 

func (w *Base) Refresh()

Refresh causes this widget to be redrawn in it's current state

func (*Base) Resize added in v2.1.0 

func (w *Base) Resize(size fyne.Size)

Resize sets a new size for a widget. Note this should not be used if the widget is being managed by a Layout within a Container.

func (*Base) Show added in v2.1.0 

func (w *Base) Show()

Show this widget so it becomes visible

func (*Base) Size 

func (w *Base) Size() fyne.Size

Size gets the current size of this widget.

func (*Base) Visible 

func (w *Base) Visible() bool

Visible returns whether or not this widget should be visible. Note that this may not mean it is currently visible if a parent has been hidden.

type BaseRenderer 

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

BaseRenderer is a renderer base providing the most common implementations of a part of the widget.Renderer interface.

func NewBaseRenderer 

func NewBaseRenderer(objects []fyne.CanvasObject) BaseRenderer

NewBaseRenderer creates a new BaseRenderer.

func (*BaseRenderer) Destroy 

func (r *BaseRenderer) Destroy()

Destroy does nothing in the base implementation.

Implements: fyne.WidgetRenderer

func (*BaseRenderer) Objects 

func (r *BaseRenderer) Objects() []fyne.CanvasObject

Objects returns the objects that should be rendered.

Implements: fyne.WidgetRenderer

func (*BaseRenderer) SetObjects 

func (r *BaseRenderer) SetObjects(objects []fyne.CanvasObject)

SetObjects updates the objects of the renderer.

type ElevationLevel 

type ElevationLevel int

ElevationLevel is the level of elevation of the shadow casting object. 

const (
	BaseLevel             ElevationLevel = 0
	CardLevel             ElevationLevel = 1
	ButtonLevel           ElevationLevel = 2
	MenuLevel             ElevationLevel = 4
	PopUpLevel            ElevationLevel = 8
	SubmergedContentLevel ElevationLevel = 8
	DialogLevel           ElevationLevel = 24
)

ElevationLevel constants inspired by: https://storage.googleapis.com/spec-host/mio-staging%2Fmio-design%2F1584058305895%2Fassets%2F0B6xUSjjSulxceF9udnA4Sk5tdU0%2Fbaselineelevation-chart.png

type OverlayContainer 

type OverlayContainer struct {
	Base
	Content fyne.CanvasObject
	// contains filtered or unexported fields
}

OverlayContainer is a transparent widget containing one fyne.CanvasObject and meant to be used as overlay.

func NewOverlayContainer 

func NewOverlayContainer(c fyne.CanvasObject, canvas fyne.Canvas, onDismiss func()) *OverlayContainer

NewOverlayContainer creates an OverlayContainer.

func (*OverlayContainer) CreateRenderer 

func (o *OverlayContainer) CreateRenderer() fyne.WidgetRenderer

CreateRenderer returns a new renderer for the overlay container.

Implements: fyne.Widget

func (*OverlayContainer) Hide 

func (o *OverlayContainer) Hide()

Hide hides the overlay container.

Implements: fyne.Widget

func (*OverlayContainer) MouseIn 

func (o *OverlayContainer) MouseIn(*desktop.MouseEvent)

MouseIn catches mouse-in events not handled by the container’s content. It does nothing.

Implements: desktop.Hoverable

func (*OverlayContainer) MouseMoved 

func (o *OverlayContainer) MouseMoved(*desktop.MouseEvent)

MouseMoved catches mouse-moved events not handled by the container’s content. It does nothing.

Implements: desktop.Hoverable

func (*OverlayContainer) MouseOut 

func (o *OverlayContainer) MouseOut()

MouseOut catches mouse-out events not handled by the container’s content. It does nothing.

Implements: desktop.Hoverable

func (*OverlayContainer) Show 

func (o *OverlayContainer) Show()

Show makes the overlay container visible.

Implements: fyne.Widget

func (*OverlayContainer) Tapped 

func (o *OverlayContainer) Tapped(*fyne.PointEvent)

Tapped catches tap events not handled by the container’s content. It performs the overlay container’s dismiss action.

Implements: fyne.Tappable

type Scroll 

type Scroll struct {
	Base

	Direction ScrollDirection
	Content   fyne.CanvasObject
	Offset    fyne.Position
	// OnScrolled can be set to be notified when the Scroll has changed position.
	// You should not update the Scroll.Offset from this method.
	//
	// Since: 2.0
	OnScrolled func(fyne.Position)
	// contains filtered or unexported fields
}

Scroll defines a container that is smaller than the Content. The Offset is used to determine the position of the child widgets within the container.

func NewHScroll 

func NewHScroll(content fyne.CanvasObject) *Scroll

NewHScroll create a scrollable parent wrapping the specified content. Note that this may cause the MinSize.Width to be smaller than that of the passed object.

func NewScroll 

func NewScroll(content fyne.CanvasObject) *Scroll

NewScroll creates a scrollable parent wrapping the specified content. Note that this may cause the MinSize to be smaller than that of the passed object.

func NewVScroll 

func NewVScroll(content fyne.CanvasObject) *Scroll

NewVScroll create a scrollable parent wrapping the specified content. Note that this may cause the MinSize.Height to be smaller than that of the passed object.

func (*Scroll) CreateRenderer 

func (s *Scroll) CreateRenderer() fyne.WidgetRenderer

CreateRenderer is a private method to Fyne which links this widget to its renderer

func (*Scroll) DragEnd 

func (s *Scroll) DragEnd()

DragEnd will stop scrolling on mobile has stopped

func (*Scroll) Dragged 

func (s *Scroll) Dragged(e *fyne.DragEvent)

Dragged will scroll on any drag - bar or otherwise - for mobile

func (*Scroll) MinSize 

func (s *Scroll) MinSize() fyne.Size

MinSize returns the smallest size this widget can shrink to

func (*Scroll) Refresh 

func (s *Scroll) Refresh()

Refresh causes this widget to be redrawn in it's current state

func (*Scroll) Resize 

func (s *Scroll) Resize(sz fyne.Size)

Resize is called when this scroller should change size. We refresh to ensure the scroll bars are updated.

func (*Scroll) ScrollToBottom 

func (s *Scroll) ScrollToBottom()

ScrollToBottom will scroll content to container bottom - to show latest info which end user just added

func (*Scroll) ScrollToTop 

func (s *Scroll) ScrollToTop()

ScrollToTop will scroll content to container top

func (*Scroll) Scrolled 

func (s *Scroll) Scrolled(ev *fyne.ScrollEvent)

Scrolled is called when an input device triggers a scroll event

func (*Scroll) SetMinSize 

func (s *Scroll) SetMinSize(size fyne.Size)

SetMinSize specifies a minimum size for this scroll container. If the specified size is larger than the content size then scrolling will not be enabled This can be helpful to appear larger than default if the layout is collapsing this widget.

type ScrollDirection 

type ScrollDirection int

ScrollDirection represents the directions in which a Scroll can scroll its child content. 

const (
	// ScrollBoth supports horizontal and vertical scrolling.
	ScrollBoth ScrollDirection = iota
	// ScrollHorizontalOnly specifies the scrolling should only happen left to right.
	ScrollHorizontalOnly
	// ScrollVerticalOnly specifies the scrolling should only happen top to bottom.
	ScrollVerticalOnly
	// ScrollNone turns off scrolling for this container.
	//
	// Since: 2.0
	ScrollNone
)

Constants for valid values of ScrollDirection.

type Shadow 

type Shadow struct {
	Base
	// contains filtered or unexported fields
}

Shadow is a widget that renders a shadow.

func NewShadow 

func NewShadow(typ ShadowType, level ElevationLevel) *Shadow

NewShadow create a new Shadow.

func (*Shadow) CreateRenderer 

func (s *Shadow) CreateRenderer() fyne.WidgetRenderer

CreateRenderer returns a new renderer for the shadow.

Implements: fyne.Widget

type ShadowType 

type ShadowType int

ShadowType specifies the type of the shadow. 

const (
	ShadowAround ShadowType = iota
	ShadowLeft
	ShadowRight
	ShadowBottom
	ShadowTop
)

ShadowType constants

type ShadowingRenderer 

type ShadowingRenderer struct {
	BaseRenderer
	// contains filtered or unexported fields
}

ShadowingRenderer is a renderer that adds a shadow arount the rendered content. When using the ShadowingRenderer the embedding renderer should call LayoutShadow(contentSize, contentPos) to lay out the shadow.

func NewShadowingRenderer 

func NewShadowingRenderer(objects []fyne.CanvasObject, level ElevationLevel) *ShadowingRenderer

NewShadowingRenderer creates a ShadowingRenderer.

func (*ShadowingRenderer) LayoutShadow 

func (r *ShadowingRenderer) LayoutShadow(size fyne.Size, pos fyne.Position)

LayoutShadow adjusts the size and position of the shadow if necessary.

func (*ShadowingRenderer) RefreshShadow added in v2.1.0 

func (r *ShadowingRenderer) RefreshShadow()

RefreshShadow asks the shadow graphical element to update to current theme

func (*ShadowingRenderer) SetObjects 

func (r *ShadowingRenderer) SetObjects(objects []fyne.CanvasObject)

SetObjects updates the renderer's objects including the shadow if necessary.

type SimpleRenderer added in v2.1.0 

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

SimpleRenderer is a basic renderer that satisfies widget.Renderer interface by wrapping a single fyne.CanvasObject.

Since: 2.1

func NewSimpleRenderer added in v2.1.0 

func NewSimpleRenderer(object fyne.CanvasObject) *SimpleRenderer

NewSimpleRenderer creates a new SimpleRenderer to render a widget using a single CanvasObject.

Since: 2.1

func (*SimpleRenderer) Destroy added in v2.1.0 

func (r *SimpleRenderer) Destroy()

Destroy does nothing in this implementation.

Implements: fyne.WidgetRenderer

Since: 2.1

func (*SimpleRenderer) Layout added in v2.1.0 

func (r *SimpleRenderer) Layout(s fyne.Size)

Layout updates the contained object to be the requested size.

Implements: fyne.WidgetRenderer

Since: 2.1

func (*SimpleRenderer) MinSize added in v2.1.0 

func (r *SimpleRenderer) MinSize() fyne.Size

MinSize returns the smallest size that this render can use, returned from the underlying object.

Implements: fyne.WidgetRenderer

Since: 2.1

func (*SimpleRenderer) Objects added in v2.1.0 

func (r *SimpleRenderer) Objects() []fyne.CanvasObject

Objects returns the objects that should be rendered.

Implements: fyne.WidgetRenderer

Since: 2.1

func (*SimpleRenderer) Refresh added in v2.1.0 

func (r *SimpleRenderer) Refresh()

Refresh requests the underlying object to redraw.

Implements: fyne.WidgetRenderer

Since: 2.1

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