Migrated the GTK+ backend to the new sizer system.

redo/containerctrls_unix.go

@@ -9,17 +9,13 @@ import (
 )
 
 // #include "gtk_unix.h"
-// extern void layoutResizing(GtkWidget *, GdkRectangle *, gpointer);
 import "C"
 
 type tab struct {
 	*controlbase
 	notebook		*C.GtkNotebook
 
-	containers	[]*container
+	tabs			[]*layout
-	layoutws		[]*C.GtkWidget
-	layoutcs		[]*C.GtkContainer
-	layouts		[]*C.GtkLayout
 }
 
 func newTab() Tab {
@@ -34,35 +30,16 @@ func newTab() Tab {
 }
 
 func (t *tab) Append(name string, control Control) {
-	// TODO isolate and standardize
+	tl := newLayout(control)
-	layout := C.gtk_layout_new(nil, nil)
+	t.tabs = append(t.tabs, tl)
-	t.layoutws = append(t.layoutws, layout)
-	t.layoutcs = append(t.layoutcs, (*C.GtkContainer)(unsafe.Pointer(layout)))
-	t.layouts = append(t.layouts, (*C.GtkLayout)(unsafe.Pointer(layout)))
-	c := new(container)
-	t.containers = append(t.containers, c)
-	c.child = control
-	c.child.setParent(&controlParent{(*C.GtkContainer)(unsafe.Pointer(layout))})
-	g_signal_connect_after(
-		C.gpointer(unsafe.Pointer(layout)),
-		"size-allocate",
-		C.GCallback(C.layoutResizing),
-		C.gpointer(unsafe.Pointer(c)))
 	cname := togstr(name)
 	defer freegstr(cname)
 	tab := C.gtk_notebook_append_page(t.notebook,
-		layout,
+		tl.layoutwidget,
 		C.gtk_label_new(cname))
 	if tab == -1 {
 		panic("gtk_notebook_append_page() failed")
 	}
 }
 
-// no need to override Control.allocate() as only prepared the tabbed control; its children will be reallocated when that one is resized
+// no need to override Control.commitResize() as only prepared the tabbed control; its children will be reallocated when that one is resized
-
-//export layoutResizing
-func layoutResizing(wid *C.GtkWidget, r *C.GdkRectangle, data C.gpointer) {
-	c := (*container)(unsafe.Pointer(data))
-	// the layout's coordinate system is localized, so the origin is (0, 0)
-	c.resize(0, 0, int(r.width), int(r.height))
-}

redo/sizer_unix.go

@@ -0,0 +1,84 @@
+// +build !windows,!darwin
+
+// 23 february 2014
+
+package ui
+
+import (
+	"unsafe"
+"fmt"
+)
+
+// #include "gtk_unix.h"
+// extern void layoutResizing(GtkWidget *, GdkRectangle *, gpointer);
+import "C"
+
+type sizing struct {
+	sizingbase
+
+	// for size calculations
+	// gtk+ needs nothing
+
+	// for the actual resizing
+	shouldVAlignTop	bool
+}
+
+const (
+	gtkXMargin = 12
+	gtkYMargin = 12
+	gtkXPadding = 12
+	gtkYPadding = 6
+)
+
+func (s *sizer) beginResize() (d *sizing) {
+	d = new(sizing)
+	if spaced {
+		d.xmargin = gtkXMargin
+		d.ymargin = gtkYMargin
+		d.xpadding = gtkXPadding
+		d.ypadding = gtkYPadding
+	}
+	return d
+}
+
+func (s *sizer) translateAllocationCoords(allocations []*allocation, winwidth, winheight int) {
+	// no need for coordinate conversion with gtk+
+}
+
+// layout maintains the widget hierarchy by containing all of a sizer's children in a single layout widget
+type layout struct {
+	*sizer
+	layoutwidget		*C.GtkWidget
+	layoutcontainer	*C.GtkContainer
+	layout			*C.GtkLayout
+}
+
+func newLayout(child Control) *layout {
+	widget := C.gtk_layout_new(nil, nil)
+	l := &layout{
+		sizer:			new(sizer),
+		layoutwidget:		widget,
+		layoutcontainer:	(*C.GtkContainer)(unsafe.Pointer(widget)),
+		layout:			(*C.GtkLayout)(unsafe.Pointer(widget)),
+	}
+	l.child = child
+	l.child.setParent(&controlParent{l.layoutcontainer})
+	// we connect to the layout's size-allocate, not to the window's configure-event
+	// this allows us to handle client-side decoration-based configurations (such as GTK+ on Wayland) properly
+	// also see commitResize() in sizing_unix.go for additional notes
+	// thanks to many people in irc.gimp.net/#gtk+ for help (including tristan for suggesting g_signal_connect_after())
+	g_signal_connect_after(
+		C.gpointer(unsafe.Pointer(l.layout)),
+		"size-allocate",
+		C.GCallback(C.layoutResizing),
+		C.gpointer(unsafe.Pointer(l)))
+	return l
+}
+
+//export layoutResizing
+func layoutResizing(wid *C.GtkWidget, r *C.GdkRectangle, data C.gpointer) {
+	l := (*layout)(unsafe.Pointer(data))
+	// the layout's coordinate system is localized, so the origin is (0, 0)
+	l.resize(0, 0, int(r.width), int(r.height))
+fmt.Printf("new size %d x %d\n", r.width, r.height)
+}

redo/sizing_unix.go

@@ -1,40 +0,0 @@
-// +build !windows,!darwin
-
-// 23 february 2014
-
-package ui
-
-// #include "gtk_unix.h"
-import "C"
-
-type sizing struct {
-	sizingbase
-
-	// for size calculations
-	// gtk+ needs nothing
-
-	// for the actual resizing
-	shouldVAlignTop	bool
-}
-
-const (
-	gtkXMargin = 12
-	gtkYMargin = 12
-	gtkXPadding = 12
-	gtkYPadding = 6
-)
-
-func (c *container) beginResize() (d *sizing) {
-	d = new(sizing)
-	if spaced {
-		d.xmargin = gtkXMargin
-		d.ymargin = gtkYMargin
-		d.xpadding = gtkXPadding
-		d.ypadding = gtkYPadding
-	}
-	return d
-}
-
-func (c *container) translateAllocationCoords(allocations []*allocation, winwidth, winheight int) {
-	// no need for coordinate conversion with gtk+
-}

redo/window_unix.go

@@ -6,7 +6,6 @@ package ui
 
 import (
 	"unsafe"
-"fmt"
 )
 
 // #include "gtk_unix.h"
@@ -20,30 +19,21 @@ type window struct {
 	bin		*C.GtkBin
 	window	*C.GtkWindow
 
-	layoutw	*C.GtkWidget
-	layoutc	*C.GtkContainer
-	layout	*C.GtkLayout
-
 	closing	*event
 
-	*container
+	*layout
 }
 
 func newWindow(title string, width int, height int, control Control) *window {
 	widget := C.gtk_window_new(C.GTK_WINDOW_TOPLEVEL)
 	ctitle := togstr(title)
 	defer freegstr(ctitle)
-	layoutw := C.gtk_layout_new(nil, nil)
 	w := &window{
 		widget:		widget,
 		wc:			(*C.GtkContainer)(unsafe.Pointer(widget)),
 		bin:			(*C.GtkBin)(unsafe.Pointer(widget)),
 		window:		(*C.GtkWindow)(unsafe.Pointer(widget)),
-		layoutw:		layoutw,
-		layoutc:		(*C.GtkContainer)(unsafe.Pointer(layoutw)),
-		layout:		(*C.GtkLayout)(unsafe.Pointer(layoutw)),
 		closing:		newEvent(),
-		container:		new(container),
 	}
 	C.gtk_window_set_title(w.window, ctitle)
 	g_signal_connect(
@@ -51,19 +41,9 @@ func newWindow(title string, width int, height int, control Control) *window {
 		"delete-event",
 		C.GCallback(C.windowClosing),
 		C.gpointer(unsafe.Pointer(w)))
-	// we connect to the layout's size-allocate, not to the window's configure-event
-	// this allows us to handle client-side decoration-based configurations (such as GTK+ on Wayland) properly
-	// also see commitResize() in sizing_unix.go for additional notes
-	// thanks to many people in irc.gimp.net/#gtk+ for help (including tristan for suggesting g_signal_connect_after())
-	g_signal_connect_after(
-		C.gpointer(unsafe.Pointer(layoutw)),
-		"size-allocate",
-		C.GCallback(C.windowResizing),
-		C.gpointer(unsafe.Pointer(w)))
 	C.gtk_window_resize(w.window, C.gint(width), C.gint(height))
-	C.gtk_container_add(w.wc, layoutw)
+	w.layout = newLayout(control)
-	w.child = control
+	C.gtk_container_add(w.wc, w.layout.layoutwidget)
-	w.child.setParent(&controlParent{w.layoutc})
 	return w
 }
 
@@ -108,5 +88,4 @@ func windowResizing(wid *C.GtkWidget, r *C.GdkRectangle, data C.gpointer) {
 	w := (*window)(unsafe.Pointer(data))
 	// the origin of the window's content area is always (0, 0)
 	w.resize(0, 0, int(r.width), int(r.height))
-	fmt.Printf("new size %d x %d\n", r.width, r.height)
 }