...in with the new.

1 files changed, 99 insertions, 0 deletions

diff --git a/label_windows.go b/label_windows.go
new file mode 100644
index 0000000..96daa67
--- /dev/null
+++ b/label_windows.go
@@ -0,0 +1,99 @@
+// 15 july 2014
+
+package ui
+
+// #include "winapi_windows.h"
+import "C"
+
+type label struct {
+	_hwnd		C.HWND
+	_textlen		C.LONG
+	standalone	bool
+}
+
+var labelclass = toUTF16("STATIC")
+
+func finishNewLabel(text string, standalone bool) *label {
+	hwnd := C.newControl(labelclass,
+		// SS_NOPREFIX avoids accelerator translation; SS_LEFTNOWORDWRAP clips text past the end
+		// controls are vertically aligned to the top by default (thanks Xeek in irc.freenode.net/#winapi)
+		C.SS_NOPREFIX | C.SS_LEFTNOWORDWRAP,
+		C.WS_EX_TRANSPARENT)
+	l := &label{
+		_hwnd:		hwnd,
+		standalone:	standalone,
+	}
+	l.SetText(text)
+	C.controlSetControlFont(l._hwnd)
+	return l
+}
+
+func newLabel(text string) Label {
+	return finishNewLabel(text, false)
+}
+
+func newStandaloneLabel(text string) Label {
+	return finishNewLabel(text, true)
+}
+
+func (l *label) Text() string {
+	return baseText(l)
+}
+
+func (l *label) SetText(text string) {
+	baseSetText(l, text)
+}
+
+func (l *label) isStandalone() bool {
+	return l.standalone
+}
+
+func (l *label) hwnd() C.HWND {
+	return l._hwnd
+}
+
+func (l *label) textlen() C.LONG {
+	return l._textlen
+}
+
+func (l *label) settextlen(len C.LONG) {
+	l._textlen = len
+}
+
+func (l *label) setParent(p *controlParent) {
+	C.controlSetParent(l.hwnd(), p.c.hwnd)
+	// don't increment p.c.nchildren here because Labels aren't tab stops
+}
+
+func (l *label) allocate(x int, y int, width int, height int, d *sizing) []*allocation {
+	return baseallocate(l, x, y, width, height, d)
+}
+
+const (
+	// via http://msdn.microsoft.com/en-us/library/windows/desktop/dn742486.aspx#sizingandspacing
+	labelHeight = 8
+	labelYOffset = 3
+)
+
+func (l *label) preferredSize(d *sizing) (width, height int) {
+	return int(l._textlen), fromdlgunitsY(labelHeight, d)
+}
+
+func (l *label) commitResize(c *allocation, d *sizing) {
+	if !l.standalone {
+		yoff := fromdlgunitsY(labelYOffset, d)
+		c.y += yoff
+		c.height -= yoff
+		// by default, labels are drawn offset by the internal leading (the space reserved for accents on uppercase letters)
+		// the above calculation assumes otherwise, so account for the difference
+		// there will be enough space left over for the internal leading anyway (at least on the standard fonts)
+		// don't do this to standalone labels, otherwise those accents get cut off!
+		c.y -= int(d.internalLeading)
+		c.height += int(d.internalLeading)
+	}
+	basecommitResize(l, c, d)
+}
+
+func (l *label) getAuxResizeInfo(d *sizing) {
+	basegetAuxResizeInfo(l, d)
+}