andlabs-ui/redo/label_darwin.go

92 lines
2.3 KiB
Go

// 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) 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)
}
// TODO if there's no baseline, the alignment should be to the top /of the alignment rect/, not the frame
}
basecommitResize(l, c, d)
}
func (l *label) getAuxResizeInfo(d *sizing) {
basegetAuxResizeInfo(l, d)
}