1 files changed, 93 insertions, 0 deletions
diff --git a/redo/containers_windows.go b/redo/containers_windows.go
new file mode 100644
index 0000000..a5e8ec6
--- /dev/null
+++ b/redo/containers_windows.go
@@ -0,0 +1,93 @@
+// 25 july 2014
+
+package ui
+
+import (
+	"unsafe"
+)
+
+// #include "winapi_windows.h"
+import "C"
+
+/*
+On Windows, container controls are just regular controls; their children have to be children of the parent window, and changing the contents of a switching container (such as a tab control) must be done manually. Mind the odd code here.
+
+TODO
+- make sure all tabs cannot be deselected (that is, make sure the current tab can never have index -1)
+*/
+
+type tab struct {
+	*widgetbase
+	tabs			[]Control
+	curparent		*window
+}
+
+func newTab() Tab {
+	w := newWidget(C.xWC_TABCONTROL,
+		C.TCS_TOOLTIPS | C.WS_TABSTOP,
+		0)
+	t := &tab{
+		widgetbase:	w,
+	}
+	C.controlSetControlFont(w.hwnd)
+	C.setTabSubclass(w.hwnd, unsafe.Pointer(t))
+	return t
+}
+
+func (t *tab) unparent() {
+	t.widgetbase.unparent()
+	for _, c := range t.tabs {
+		c.unparent()
+	}
+	t.curparent = nil
+}
+
+func (t *tab) parent(win *window) {
+	t.widgetbase.parent(win)
+	for _, c := range t.tabs {
+		c.parent(win)
+	}
+	t.curparent = win
+}
+
+func (t *tab) Append(name string, control Control) {
+	t.tabs = append(t.tabs, control)
+	if t.curparent == nil {
+		control.unparent()
+	} else {
+		control.parent(t.curparent)
+	}
+	C.tabAppend(t.hwnd, toUTF16(name))
+}
+
+//export tabChanging
+func tabChanging(data unsafe.Pointer, current C.LRESULT) {
+	t := (*tab)(data)
+	t.tabs[int(current)].containerHide()
+}
+
+//export tabChanged
+func tabChanged(data unsafe.Pointer, new C.LRESULT) {
+	t := (*tab)(data)
+	t.tabs[int(new)].containerShow()
+}
+
+// a tab control contains other controls; size appropriately
+func (t *tab) allocate(x int, y int, width int, height int, d *sizing) []*allocation {
+	var r C.RECT
+
+	// first, append the tab control itself
+	a := t.widgetbase.allocate(x, y, width, height, d)
+	// now figure out what the rect for each child is
+	r.left = C.LONG(x)				// load rect with existing values
+	r.top = C.LONG(y)
+	r.right = C.LONG(x + width)
+	r.bottom = C.LONG(y + height)
+	C.tabGetContentRect(t.hwnd, &r)
+	// and allocate
+	// don't allocate to just hte current tab; allocate to all tabs!
+	for _, c := range t.tabs {
+		a = append(a, c.allocate(int(r.left), int(r.top), int(r.right - r.left), int(r.bottom - r.top), d)...)
+	}
+	return a
+}