95 lines
2.2 KiB
Go
95 lines
2.2 KiB
Go
// 15 july 2014
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package ui
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// #include "winapi_windows.h"
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import "C"
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type label struct {
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_hwnd C.HWND
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_textlen C.LONG
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standalone bool
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}
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var labelclass = toUTF16("STATIC")
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func finishNewLabel(text string, standalone bool) *label {
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hwnd := C.newControl(labelclass,
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// SS_NOPREFIX avoids accelerator translation; SS_LEFTNOWORDWRAP clips text past the end
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// controls are vertically aligned to the top by default (thanks Xeek in irc.freenode.net/#winapi)
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C.SS_NOPREFIX | C.SS_LEFTNOWORDWRAP,
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0)
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l := &label{
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_hwnd: hwnd,
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standalone: standalone,
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}
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l.SetText(text)
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C.controlSetControlFont(l._hwnd)
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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 baseText(l)
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}
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func (l *label) SetText(text string) {
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baseSetText(l, text)
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}
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func (l *label) hwnd() C.HWND {
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return l._hwnd
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}
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func (l *label) textlen() C.LONG {
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return l._textlen
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}
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func (l *label) settextlen(len C.LONG) {
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l._textlen = len
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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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const (
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// via http://msdn.microsoft.com/en-us/library/windows/desktop/dn742486.aspx#sizingandspacing
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labelHeight = 8
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labelYOffset = 3
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)
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func (l *label) preferredSize(d *sizing) (width, height int) {
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return int(l._textlen), fromdlgunitsY(labelHeight, d)
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}
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func (l *label) commitResize(c *allocation, d *sizing) {
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if !l.standalone {
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yoff := fromdlgunitsY(labelYOffset, d)
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c.y += yoff
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c.height -= yoff
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// by default, labels are drawn offset by the internal leading (the space reserved for accents on uppercase letters)
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// the above calculation assumes otherwise, so account for the difference
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// there will be enough space left over for the internal leading anyway (at least on the standard fonts)
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// don't do this to standalone labels, otherwise those accents get cut off!
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c.y -= int(d.internalLeading)
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c.height += int(d.internalLeading)
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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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