62 lines
1.8 KiB
Go
62 lines
1.8 KiB
Go
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// 16 july 2014
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package ui
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// #include "objc_darwin.h"
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import "C"
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// cheap trick
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type label struct {
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*textField
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standalone bool
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supercommitResize func(c *allocation, d *sizing)
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}
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func finishNewLabel(text string, standalone bool) *label {
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l := &label{
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textField: finishNewTextField(C.newLabel()),
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standalone: standalone,
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}
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l.SetText(text)
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l.supercommitResize = l.fcommitResize
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l.fcommitResize = l.labelcommitResize
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return l
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}
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func newLabel(text string) Label {
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return finishNewLabel(text, false)
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}
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func newStandaloneLabel(text string) Label {
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return finishNewLabel(text, true)
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}
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func (l *label) labelcommitResize(c *allocation, d *sizing) {
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if !l.standalone && c.neighbor != nil {
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c.neighbor.getAuxResizeInfo(d)
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if d.neighborAlign.baseline != 0 { // no adjustment needed if the given control has no baseline
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// in order for the baseline value to be correct, the label MUST BE AT THE HEIGHT THAT OS X WANTS IT TO BE!
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// otherwise, the baseline calculation will be relative to the bottom of the control, and everything will be wrong
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origsize := C.controlPrefSize(l.id)
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c.height = int(origsize.height)
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newrect := C.struct_xrect{
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x: C.intptr_t(c.x),
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y: C.intptr_t(c.y),
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width: C.intptr_t(c.width),
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height: C.intptr_t(c.height),
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}
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ourAlign := C.alignmentInfo(l.id, newrect)
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// we need to find the exact Y positions of the baselines
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// fortunately, this is easy now that (x,y) is the bottom-left corner
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thisbasey := ourAlign.rect.y + ourAlign.baseline
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neighborbasey := d.neighborAlign.rect.y + d.neighborAlign.baseline
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// now the amount we have to move the label down by is easy to find
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yoff := neighborbasey - thisbasey
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// and we just add that
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c.y += int(yoff)
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}
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// TODO if there's no baseline, the alignment should be to the top /of the alignment rect/, not the frame
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}
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l.supercommitResize(c, d)
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}
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