96 lines
2.5 KiB
Go
96 lines
2.5 KiB
Go
// 16 july 2014
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package ui
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import (
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"unsafe"
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)
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// #include "objc_darwin.h"
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import "C"
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type label struct {
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_id C.id
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standalone bool
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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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_id: C.newLabel(),
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standalone: standalone,
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}
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l.SetText(text)
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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) Text() string {
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return C.GoString(C.textfieldText(l._id))
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}
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func (l *label) SetText(text string) {
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ctext := C.CString(text)
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defer C.free(unsafe.Pointer(ctext))
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C.textfieldSetText(l._id, ctext)
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}
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func (l *label) isStandalone() bool {
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return l.standalone
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}
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func (l *label) id() C.id {
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return l._id
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}
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func (l *label) setParent(p *controlParent) {
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basesetParent(l, p)
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}
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func (l *label) allocate(x int, y int, width int, height int, d *sizing) []*allocation {
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return baseallocate(l, x, y, width, height, d)
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}
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func (l *label) preferredSize(d *sizing) (width, height int) {
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return basepreferredSize(l, d)
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}
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func (l *label) commitResize(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.controlPreferredSize(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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// 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
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}
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basecommitResize(l, c, d)
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}
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func (l *label) getAuxResizeInfo(d *sizing) {
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basegetAuxResizeInfo(l, d)
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}
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