1 files changed, 48 insertions, 0 deletions
diff --git a/controlsize.go b/controlsize.go
new file mode 100644
index 0000000..98563da
--- /dev/null
+++ b/controlsize.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 cSysSizeData struct {
+	xmargin		int
+	ymargin		int
+	xpadding		int
+	ypadding		int
+}
+
+// for verification; see sysdata.go
+type sysDataSizingFunctions interface {
+	beginResize() *sysSizeData
+	endResize(*sysSizeData)
+	translateAllocationCoords([]*allocation, int, int)
+	preferredSize(*sysSizeData) (int, int)
+	commitResize(*allocation, *sysSizeData)
+	getAuxResizeInfo(*sysSizeData)
+}
+
+func (s *sysData) resizeWindow(width, height int) {
+	d := s.beginResize()
+	allocations := s.allocate(0, 0, width, height, d)
+	s.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)
+	}
+	s.endResize(d)
+}
+
+// non-layout controls: allocate() should just return a one-element slice; preferredSize(), commitResize(), and getAuxResizeInfo() should defer to their sysData equivalents
+type controlSizing interface {
+	allocate(x int, y int, width int, height int, d *sysSizeData) []*allocation
+	preferredSize(d *sysSizeData) (width, height int)
+	commitResize(c *allocation, d *sysSizeData)
+	getAuxResizeInfo(d *sysSizeData)
+}