53 lines
1.1 KiB
Go
53 lines
1.1 KiB
Go
// 4 november 2014
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package ui
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import (
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"fmt"
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)
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// #include "winapi_windows.h"
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import "C"
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type progressbar struct {
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*controlSingleHWND
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}
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func newProgressBar() ProgressBar {
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hwnd := C.newControl(C.xPROGRESS_CLASS,
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C.PBS_SMOOTH,
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0)
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p := &progressbar{
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controlSingleHWND: newControlSingleHWND(hwnd),
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}
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p.fpreferredSize = p.xpreferredSize
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p.fnTabStops = func() int {
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// progress bars are not tab stops
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return 0
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}
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return p
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}
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func (p *progressbar) Percent() int {
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return int(C.SendMessageW(p.hwnd, C.PBM_GETPOS, 0, 0))
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}
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func (p *progressbar) SetPercent(percent int) {
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if percent < 0 || percent > 100 {
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panic(fmt.Errorf("given ProgressBar percentage %d out of range", percent))
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}
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// TODO circumvent aero
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C.SendMessageW(p.hwnd, C.PBM_SETPOS, C.WPARAM(percent), 0)
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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
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// this is the double-width option
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progressbarWidth = 237
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progressbarHeight = 8
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)
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func (p *progressbar) xpreferredSize(d *sizing) (width, height int) {
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return fromdlgunitsX(progressbarWidth, d), fromdlgunitsY(progressbarHeight, d)
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}
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