...in with the new.

1 files changed, 95 insertions, 0 deletions

diff --git a/label_darwin.go b/label_darwin.go
new file mode 100644
index 0000000..0508931
--- /dev/null
+++ b/label_darwin.go
@@ -0,0 +1,95 @@
+// 16 july 2014
+
+package ui
+
+import (
+	"unsafe"
+)
+
+// #include "objc_darwin.h"
+import "C"
+
+type label struct {
+	_id			C.id
+	standalone	bool
+}
+
+func finishNewLabel(text string, standalone bool) *label {
+	l := &label{
+		_id:			C.newLabel(),
+		standalone:	standalone,
+	}
+	l.SetText(text)
+	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 C.GoString(C.textfieldText(l._id))
+}
+
+func (l *label) SetText(text string) {
+	ctext := C.CString(text)
+	defer C.free(unsafe.Pointer(ctext))
+	C.textfieldSetText(l._id, ctext)
+}
+
+func (l *label) isStandalone() bool {
+	return l.standalone
+}
+
+func (l *label) id() C.id {
+	return l._id
+}
+
+func (l *label) setParent(p *controlParent) {
+	basesetParent(l, p)
+}
+
+func (l *label) allocate(x int, y int, width int, height int, d *sizing) []*allocation {
+	return baseallocate(l, x, y, width, height, d)
+}
+
+func (l *label) preferredSize(d *sizing) (width, height int) {
+	return basepreferredSize(l, d)
+}
+
+func (l *label) commitResize(c *allocation, d *sizing) {
+	if !l.standalone && c.neighbor != nil {
+		c.neighbor.getAuxResizeInfo(d)
+		if d.neighborAlign.baseline != 0 {		// no adjustment needed if the given control has no baseline
+			// in order for the baseline value to be correct, the label MUST BE AT THE HEIGHT THAT OS X WANTS IT TO BE!
+			// otherwise, the baseline calculation will be relative to the bottom of the control, and everything will be wrong
+			origsize := C.controlPreferredSize(l._id)
+			c.height = int(origsize.height)
+			newrect := C.struct_xrect{
+				x:		C.intptr_t(c.x),
+				y:		C.intptr_t(c.y),
+				width:	C.intptr_t(c.width),
+				height:	C.intptr_t(c.height),
+			}
+			ourAlign := C.alignmentInfo(l._id, newrect)
+			// we need to find the exact Y positions of the baselines
+			// fortunately, this is easy now that (x,y) is the bottom-left corner
+			thisbasey := ourAlign.rect.y + ourAlign.baseline
+			neighborbasey := d.neighborAlign.rect.y + d.neighborAlign.baseline
+			// now the amount we have to move the label down by is easy to find
+			yoff := neighborbasey - thisbasey
+			// and we just add that
+			c.y += int(yoff)
+		}
+		// in the other case, the most correct thing would be for Label to be aligned to the alignment rect, but I can't get this working, and it looks fine as it is anyway
+	}
+	basecommitResize(l, c, d)
+}
+
+func (l *label) getAuxResizeInfo(d *sizing) {
+	basegetAuxResizeInfo(l, d)
+}