Made the new sizing system work on Windows.

area.go

@@ -350,8 +350,8 @@ func (a *Area) preferredSize(d *sysSizeData) (width int, height int) {
 	return a.sysData.preferredSize(d)
 }
 
-func (a *Area) commitResize(a *allocation, d *sysSizeData) {
-	a.sysData.preferredSize(a, d)
+func (a *Area) commitResize(c *allocation, d *sysSizeData) {
+	a.sysData.commitResize(c, d)
 }
 
 func (a *Area) getAuxResizeInfo(d *sysSizeData) {

button.go

@@ -80,7 +80,7 @@ func (b *Button) preferredSize(d *sysSizeData) (width int, height int) {
 }
 
 func (b *Button) commitResize(a *allocation, d *sysSizeData) {
-	b.sysData.preferredSize(a, d)
+	b.sysData.commitResize(a, d)
 }
 
 func (b *Button) getAuxResizeInfo(d *sysSizeData) {

checkbox.go

@@ -85,7 +85,7 @@ func (c *Checkbox) preferredSize(d *sysSizeData) (width int, height int) {
 }
 
 func (c *Checkbox) commitResize(a *allocation, d *sysSizeData) {
-	c.sysData.preferredSize(a, d)
+	c.sysData.commitResize(a, d)
 }
 
 func (c *Checkbox) getAuxResizeInfo(d *sysSizeData) {

combobox.go

@@ -162,7 +162,7 @@ func (c *Combobox) preferredSize(d *sysSizeData) (width int, height int) {
 }
 
 func (c *Combobox) commitResize(a *allocation, d *sysSizeData) {
-	c.sysData.preferredSize(a, d)
+	c.sysData.commitResize(a, d)
 }
 
 func (c *Combobox) getAuxResizeInfo(d *sysSizeData) {

controlsize.go

@@ -19,7 +19,7 @@ type cSysSizeData struct {
 }
 
 // for verification; see sysdata.go
-type sysDataSizeFuncs interface {
+type sysDataSizingFunctions interface {
 	beginResize() *sysSizeData
 	endResize(*sysSizeData)
 	translateAllocationCoords([]*allocation, int, int)
@@ -32,7 +32,7 @@ func (s *sysData) resizeWindow(width, height int) {
 	d := s.beginResize()
 	allocations := s.allocate(0, 0, width, height, d)
 	s.translateAllocationCoords(allocations, width, height)
-	for _, c := range s.allocations {
+	for _, c := range allocations {
 		c.this.commitResize(c, d)
 	}
 	s.endResize(d)

controlsize_windows.go

@@ -21,15 +21,17 @@ type sysSizeData struct {
 const (
 	marginDialogUnits = 7
 	paddingDialogUnits = 4
-}
+)
 
 func (s *sysData) beginResize() (d *sysSizeData) {
 	d = new(sysSizeData)
 
 	dc := getTextDC(s.hwnd)
-	defer releaseTextDC(dc)
+	defer releaseTextDC(s.hwnd, dc)
+
+	var tm _TEXTMETRICS
 
-	r1, _, err = _getTextMetrics.Call(
+	r1, _, err := _getTextMetrics.Call(
 		uintptr(dc),
 		uintptr(unsafe.Pointer(&tm)))
 	if r1 == 0 { // failure
@@ -66,7 +68,7 @@ func (s *sysData) commitResize(c *allocation, d *sysSizeData) {
 	}
 	c.y += yoff
 	// TODO move this here
-	s.setRect(c.x, c.y, c.width, c.height)
+	s.setRect(c.x, c.y, c.width, c.height, 0)
 }
 
 func (s *sysData) getAuxResizeInfo(d *sysSizeData) {
@@ -150,8 +152,6 @@ var (
 )
 
 func getTextDC(hwnd _HWND) (dc _HANDLE) {
-	var tm _TEXTMETRICS
-
 	r1, _, err := _getDC.Call(uintptr(hwnd))
 	if r1 == 0 { // failure
 		panic(fmt.Errorf("error getting DC for preferred size calculations: %v", err))
@@ -167,7 +167,7 @@ func getTextDC(hwnd _HWND) (dc _HANDLE) {
 }
 
 func releaseTextDC(hwnd _HWND, dc _HANDLE) {
-	r1, _, err = _releaseDC.Call(
+	r1, _, err := _releaseDC.Call(
 		uintptr(hwnd),
 		uintptr(dc))
 	if r1 == 0 { // failure
@@ -179,7 +179,7 @@ func releaseTextDC(hwnd _HWND, dc _HANDLE) {
 func (s *sysData) preferredSize(d *sysSizeData) (width int, height int) {
 	// the preferred size of an Area is its size
 	if stdDlgSizes[s.ctype].area {
-		return s.areawidth, s.areaheight, 0		// no yoff for areas
+		return s.areawidth, s.areaheight
 	}
 
 	if msg := stdDlgSizes[s.ctype].getsize; msg != 0 {
@@ -191,7 +191,7 @@ func (s *sysData) preferredSize(d *sysSizeData) (width int, height int) {
 			uintptr(0),
 			uintptr(unsafe.Pointer(&size)))
 		if r1 != uintptr(_FALSE) { // success
-			return int(size.cx), int(size.cy), 0	// TODO
+			return int(size.cx), int(size.cy)
 		}
 		// otherwise the message approach failed, so fall back to the regular approach
 		println("message failed; falling back")

grid.go

@@ -184,7 +184,7 @@ _=ymargin
 				w = g.colwidths[col]
 				h = g.rowheights[row]
 			}
-			as := c.allocation(x, y, w, h, d)
+			as := c.allocate(x, y, w, h, d)
 			if current != nil {			// connect first left to first right
 				current.neighbor = c
 			}

label.go

@@ -89,7 +89,7 @@ func (l *Label) preferredSize(d *sysSizeData) (width int, height int) {
 }
 
 func (l *Label) commitResize(a *allocation, d *sysSizeData) {
-	l.sysData.preferredSize(a, d)
+	l.sysData.commitResize(a, d)
 }
 
 func (l *Label) getAuxResizeInfo(d *sysSizeData) {

lineedit.go

@@ -83,7 +83,7 @@ func (l *LineEdit) preferredSize(d *sysSizeData) (width int, height int) {
 }
 
 func (l *LineEdit) commitResize(a *allocation, d *sysSizeData) {
-	l.sysData.preferredSize(a, d)
+	l.sysData.commitResize(a, d)
 }
 
 func (l *LineEdit) getAuxResizeInfo(d *sysSizeData) {

listbox.go

@@ -165,7 +165,7 @@ func (l *Listbox) preferredSize(d *sysSizeData) (width int, height int) {
 }
 
 func (l *Listbox) commitResize(a *allocation, d *sysSizeData) {
-	l.sysData.preferredSize(a, d)
+	l.sysData.commitResize(a, d)
 }
 
 func (l *Listbox) getAuxResizeInfo(d *sysSizeData) {

progressbar.go

@@ -71,7 +71,7 @@ func (p *ProgressBar) preferredSize(d *sysSizeData) (width int, height int) {
 }
 
 func (p *ProgressBar) commitResize(a *allocation, d *sysSizeData) {
-	p.sysData.preferredSize(a, d)
+	p.sysData.commitResize(a, d)
 }
 
 func (p *ProgressBar) getAuxResizeInfo(d *sysSizeData) {

stdwndclass_windows.go

@@ -148,7 +148,7 @@ func stdWndProc(hwnd _HWND, uMsg uint32, wParam _WPARAM, lParam _LPARAM) _LRESUL
 		_ = mm
 		return 0
 	case _WM_SIZE:
-		if s.resize != nil {
+		if s.allocate != nil {
 			var r _RECT
 
 			r1, _, err := _getClientRect.Call(
@@ -157,8 +157,8 @@ func stdWndProc(hwnd _HWND, uMsg uint32, wParam _WPARAM, lParam _LPARAM) _LRESUL
 			if r1 == 0 {
 				panic("GetClientRect failed: " + err.Error())
 			}
-			// top-left corner is (0,0) so no need for winheight
-			s.doResize(int(r.left), int(r.top), int(r.right-r.left), int(r.bottom-r.top), 0)
+			// top-left corner of a client rect is (0,0) so no need for left/top
+			s.resizeWindow(int(r.right), int(r.bottom))
 			// TODO use the Defer movement functions here?
 			// TODO redraw window and all children here?
 		}

sysdata.go

@@ -13,7 +13,7 @@ func newEvent() chan struct{} {
 type cSysData struct {
 	ctype     int
 	event     chan struct{}
-	resize    func(x int, y int, width int, height int, rr *[]resizerequest)
+	allocate    func(x int, y int, width int, height int, d *sysSizeData) []*allocation
 	spaced	bool
 	alternate bool        // editable for Combobox, multi-select for listbox, password for lineedit
 	handler   AreaHandler // for Areas
@@ -75,8 +75,5 @@ func mksysdata(ctype int) *sysData {
 			ctype: ctype,
 		},
 	}
-	if ctype == c_window { // make resizes non-nil so it can be passed in
-		s.resizes = make([]resizerequest, 0, 0)
-	}
 	return s
 }

window.go

@@ -100,7 +100,7 @@ func (w *Window) Create(control Control) {
 		panic(fmt.Errorf("error opening window: %v", err))
 	}
 	if control != nil {
-		w.sysData.resize = control.setRect
+		w.sysData.allocate = control.allocate
 		err = control.make(w.sysData)
 		if err != nil {
 			panic(fmt.Errorf("error adding window's control: %v", err))