scaled buttons to window size

customLayout.go

@@ -0,0 +1,58 @@
+package main
+
+import (
+	"fyne.io/fyne/v2"
+)
+
+type aspectRatioLayout struct {
+	aspectRatio float32
+	rows        int
+	cols        int
+}
+
+func newAspectRatioLayout(aspectRatio float32, rows, cols int) fyne.Layout {
+	return &aspectRatioLayout{aspectRatio: aspectRatio, rows: rows, cols: cols}
+}
+
+func (a *aspectRatioLayout) Layout(objects []fyne.CanvasObject, size fyne.Size) {
+	// Calculate cell size based on width
+	cellWidthBasedOnWidth := size.Width / float32(a.cols)
+	cellHeightFromWidth := cellWidthBasedOnWidth / a.aspectRatio
+
+	// Calculate cell size based on height
+	cellHeightBasedOnHeight := size.Height / float32(a.rows)
+	cellWidthFromHeight := cellHeightBasedOnHeight * a.aspectRatio
+
+	var cellWidth, cellHeight float32
+
+	// Choose the smaller of the two to fit in the container
+	if cellWidthBasedOnWidth*float32(a.cols) <= size.Width && cellHeightFromWidth*float32(a.rows) <= size.Height {
+		cellWidth = cellWidthBasedOnWidth
+		cellHeight = cellHeightFromWidth
+	} else {
+		cellWidth = cellWidthFromHeight
+		cellHeight = cellHeightBasedOnHeight
+	}
+
+	if cellHeight*float32(a.rows) > size.Height {
+		cellHeight = size.Height / float32(a.rows)
+		cellWidth = cellHeight * a.aspectRatio
+	}
+
+	x, y := float32(0), float32(0)
+	for i, o := range objects {
+		o.Resize(fyne.NewSize(cellWidth, cellHeight))
+		o.Move(fyne.NewPos(x, y))
+
+		if (i+1)%a.cols == 0 {
+			x = 0
+			y += cellHeight
+		} else {
+			x += cellWidth
+		}
+	}
+}
+
+func (a *aspectRatioLayout) MinSize(objects []fyne.CanvasObject) fyne.Size {
+	return fyne.NewSize(10, 10)
+}