ui: basic map scroller

client/widget.go

@@ -0,0 +1,43 @@
+package client
+
+import (
+	"image/color"
+
+	"fyne.io/fyne/v2"
+	"fyne.io/fyne/v2/canvas"
+	"fyne.io/fyne/v2/theme"
+)
+
+type rasterWidgetRender struct {
+	canvas   *interactiveRaster
+	bg       *canvas.Raster
+	onLayout func(fyne.Size)
+}
+
+func (r *rasterWidgetRender) Layout(size fyne.Size) {
+	r.bg.Resize(size)
+	r.canvas.raster.Resize(size)
+	if r.onLayout != nil {
+		r.onLayout(size)
+	}
+	// fmt.Println("widget layout:", size.Width, size.Height, "raster:", r.canvas.raster.Size())
+}
+
+func (r *rasterWidgetRender) MinSize() fyne.Size {
+	return r.MinSize()
+}
+
+func (r *rasterWidgetRender) Refresh() {
+	canvas.Refresh(r.canvas)
+}
+
+func (r *rasterWidgetRender) BackgroundColor() color.Color {
+	return theme.Color(theme.ColorNameBackground)
+}
+
+func (r *rasterWidgetRender) Objects() []fyne.CanvasObject {
+	return []fyne.CanvasObject{r.bg, r.canvas.raster}
+}
+
+func (r *rasterWidgetRender) Destroy() {
+}