Ilia Denisov
102 lines
1.9 KiB
Go
102 lines
1.9 KiB
Go
package client
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import (
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"image/color"
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"fyne.io/fyne/v2"
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"fyne.io/fyne/v2/canvas"
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"fyne.io/fyne/v2/widget"
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)
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type interactiveRaster struct {
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widget.BaseWidget
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min fyne.Size
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raster *canvas.Raster
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onLayout func(fyne.Size)
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onScrolled func(*fyne.ScrollEvent)
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onDragged func(*fyne.DragEvent)
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onDragEnd func()
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onTapped func(*fyne.PointEvent)
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}
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func (r *interactiveRaster) SetMinSize(size fyne.Size) {
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r.min = size
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r.Resize(size)
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}
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func (r *interactiveRaster) MinSize() fyne.Size {
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return r.min
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}
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func (r *interactiveRaster) CreateRenderer() fyne.WidgetRenderer {
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return &rasterWidgetRender{
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canvas: r,
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bg: canvas.NewRasterWithPixels(bgPattern),
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onLayout: r.onLayout,
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}
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}
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// Tapped is a left-click event
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func (r *interactiveRaster) Tapped(ev *fyne.PointEvent) {
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if r.onTapped == nil {
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return
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}
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r.onTapped(ev)
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}
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// TappedSecondary is a right-click event
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func (r *interactiveRaster) TappedSecondary(*fyne.PointEvent) {}
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func newInteractiveRaster(
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raster *canvas.Raster,
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onLayout func(fyne.Size),
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onScrolled func(*fyne.ScrollEvent),
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onDragged func(*fyne.DragEvent),
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onDragEnd func(),
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onTapped func(*fyne.PointEvent),
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) *interactiveRaster {
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r := &interactiveRaster{
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raster: raster,
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onLayout: onLayout,
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onScrolled: onScrolled,
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onDragged: onDragged,
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onDragEnd: onDragEnd,
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onTapped: onTapped,
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}
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r.ExtendBaseWidget(r)
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return r
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}
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func bgPattern(x, y, _, _ int) color.Color {
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const boxSize = 25
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if (x/boxSize)%2 == (y/boxSize)%2 {
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return color.Gray{Y: 58}
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}
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return color.Gray{Y: 84}
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}
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func (r *interactiveRaster) Scrolled(e *fyne.ScrollEvent) {
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if r.onScrolled == nil {
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return
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}
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r.onScrolled(e)
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}
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func (r *interactiveRaster) Dragged(e *fyne.DragEvent) {
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if r.onDragged == nil {
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return
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}
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r.onDragged(e)
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}
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func (r *interactiveRaster) DragEnd() {
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if r.onDragEnd == nil {
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return
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}
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r.onDragEnd()
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}
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