1 files changed, 48 insertions, 0 deletions
diff --git a/redo/sizing.go b/redo/sizing.go
new file mode 100644
index 0000000..a3f8c0e
--- /dev/null
+++ b/redo/sizing.go
@@ -0,0 +1,48 @@
+// 25 june 2014
+
+package ui
+
+type allocation struct {
+	x		int
+	y		int
+	width	int
+	height	int
+	this		Control
+	neighbor	Control
+}
+
+type sizingbase struct {
+	xmargin		int
+	ymargin		int
+	xpadding		int
+	ypadding		int
+}
+
+// this ensures that all *windows across all platforms contain the necessary functions
+// if this fails to compile, we have a problem
+var windowSizeEnsure interface {
+	beginResize() *sizing
+	endResize(*sizing)
+	translateAllocationCoords([]*allocation, int, int)
+} = &window{}
+
+type controlSizing interface {
+	allocate(x int, y int, width int, height int, d *sizing) []*allocation
+	preferredSize(*sizing) (int, int)
+	commitResize(*allocation, *sizing)
+	getAuxResizeInfo(*sizing)
+}
+
+func (w *window) doresize(width, height int) {
+	if w.child == nil {		// no children; nothing to do
+		return
+	}
+	d := w.beginResize()
+	allocations := w.child.allocate(0, 0, width, height, d)
+	w.translateAllocationCoords(allocations, width, height)
+	// move in reverse so as to approximate right->left order so neighbors make sense
+	for i := len(allocations) - 1; i >= 0; i-- {
+		allocations[i].this.commitResize(allocations[i], d)
+	}
+	w.endResize(d)
+}