Fyne API "fyne.WidgetRenderer"
fyne.WidgetRenderer
import "fyne.io/fyne"
Usage
type WidgetRenderer
type WidgetRenderer interface {
// BackgroundColor returns the color that should be used to draw the background of this renderer's widget.
//
// Deprecated: Widgets will no longer have a background to support hover and selection indication in collection widgets.
// If a widget requires a background color or image, this can be achieved by using a canvas.Rect or canvas.Image
// as the first child of a MaxLayout, followed by the rest of the widget components.
BackgroundColor() color.Color
// Destroy is for internal use.
Destroy()
// Layout is a hook that is called if the widget needs to be laid out.
// This should never call Refresh.
Layout(Size)
// MinSize returns the minimum size of the widget that is rendered by this renderer.
MinSize() Size
// Objects returns all objects that should be drawn.
Objects() []CanvasObject
// Refresh is a hook that is called if the widget has updated and needs to be redrawn.
// This might trigger a Layout.
Refresh()
}
WidgetRenderer defines the behaviour of a widget’s implementation. This is returned from a widget’s declarative object through the CreateRenderer() function and should be exactly one instance per widget in memory.