driver

package
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Published: Jun 30, 2022 License: BSD-3-Clause Imports: 3 Imported by: 0

Documentation

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func AbsolutePositionForObject

func AbsolutePositionForObject(object fyne.CanvasObject, trees []fyne.CanvasObject) fyne.Position

AbsolutePositionForObject returns the absolute position of an object in a set of object trees. If the object is not part of any of the trees, the position (0,0) is returned.

func FindObjectAtPositionMatching

func FindObjectAtPositionMatching(mouse fyne.Position, matches func(object fyne.CanvasObject) bool, overlay fyne.CanvasObject, roots ...fyne.CanvasObject) (fyne.CanvasObject, fyne.Position, int)

FindObjectAtPositionMatching is used to find an object in a canvas at the specified position. The matches function determines of the type of object that is found at this position is of a suitable type. The various canvas roots and overlays that can be searched are also passed in.

func ReverseWalkVisibleObjectTree

func ReverseWalkVisibleObjectTree(
	obj fyne.CanvasObject,
	beforeChildren func(fyne.CanvasObject, fyne.Position, fyne.Position, fyne.Size) bool,
	afterChildren func(fyne.CanvasObject, fyne.CanvasObject),
) bool

ReverseWalkVisibleObjectTree will walk an object tree in reverse order for all visible objects executing the passed functions following the following rules: - beforeChildren is called for the start obj before traversing its children - the obj's children are traversed by calling walkObjects on each of the visible items - afterChildren is called for the obj after traversing the obj's children The walk can be aborted by returning true in one of the functions:

  • if beforeChildren returns true, further traversing is stopped immediately, the after function will not be called for the obj where the walk stopped, however, it will be called for all its parents

func WalkCompleteObjectTree

func WalkCompleteObjectTree(
	obj fyne.CanvasObject,
	beforeChildren func(fyne.CanvasObject, fyne.Position, fyne.Position, fyne.Size) bool,
	afterChildren func(fyne.CanvasObject, fyne.CanvasObject),
) bool

WalkCompleteObjectTree will walk an object tree for all objects (ignoring visible state) executing the passed functions following the following rules: - beforeChildren is called for the start obj before traversing its children - the obj's children are traversed by calling walkObjects on each of the items - afterChildren is called for the obj after traversing the obj's children The walk can be aborted by returning true in one of the functions:

  • if beforeChildren returns true, further traversing is stopped immediately, the after function will not be called for the obj where the walk stopped, however, it will be called for all its parents

func WalkVisibleObjectTree

func WalkVisibleObjectTree(
	obj fyne.CanvasObject,
	beforeChildren func(fyne.CanvasObject, fyne.Position, fyne.Position, fyne.Size) bool,
	afterChildren func(fyne.CanvasObject, fyne.CanvasObject),
) bool

WalkVisibleObjectTree will walk an object tree for all visible objects executing the passed functions following the following rules: - beforeChildren is called for the start obj before traversing its children - the obj's children are traversed by calling walkObjects on each of the visible items - afterChildren is called for the obj after traversing the obj's children The walk can be aborted by returning true in one of the functions:

  • if beforeChildren returns true, further traversing is stopped immediately, the after function will not be called for the obj where the walk stopped, however, it will be called for all its parents

Types

type WithContext

type WithContext interface {
	RunWithContext(f func())
	RescaleContext()
	Context() interface{}
}

WithContext allows drivers to execute within another context. Mostly this helps GLFW code execute within the painter's GL context.

Directories

Path Synopsis
Package glfw provides a full Fyne desktop driver that uses the system OpenGL libraries.
Package glfw provides a full Fyne desktop driver that uses the system OpenGL libraries.
app
Package app lets you write portable all-Go apps for Android and iOS.
Package app lets you write portable all-Go apps for Android and iOS.
event/key
Package key defines an event for physical keyboard keys.
Package key defines an event for physical keyboard keys.
event/lifecycle
Package lifecycle defines an event for an app's lifecycle.
Package lifecycle defines an event for an app's lifecycle.
event/paint
Package paint defines an event for the app being ready to paint.
Package paint defines an event for the app being ready to paint.
event/size
Package size defines an event for the dimensions, physical resolution and orientation of the app's window.
Package size defines an event for the dimensions, physical resolution and orientation of the app's window.
event/touch
Package touch defines an event for touch input.
Package touch defines an event for touch input.
gl
Package gl implements Go bindings for OpenGL ES 2.0 and ES 3.0.
Package gl implements Go bindings for OpenGL ES 2.0 and ES 3.0.
mobileinit
Package mobileinit contains common initialization logic for mobile platforms that is relevant to both all-Go apps and gobind-based apps.
Package mobileinit contains common initialization logic for mobile platforms that is relevant to both all-Go apps and gobind-based apps.

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