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// 4 november 2014
package ui
import (
"fmt"
)
// #include "winapi_windows.h"
import "C"
type progressbar struct {
*controlSingleHWND
}
func newProgressBar() ProgressBar {
hwnd := C.newControl(C.xPROGRESS_CLASS,
C.PBS_SMOOTH,
0)
p := &progressbar{
controlSingleHWND: newControlSingleHWND(hwnd),
}
p.fpreferredSize = p.xpreferredSize
p.fnTabStops = func() int {
// progress bars are not tab stops
return 0
}
return p
}
func (p *progressbar) Percent() int {
return int(C.SendMessageW(p.hwnd, C.PBM_GETPOS, 0, 0))
}
func (p *progressbar) SetPercent(percent int) {
if percent < 0 || percent > 100 {
panic(fmt.Errorf("given ProgressBar percentage %d out of range", percent))
}
// TODO circumvent aero
C.SendMessageW(p.hwnd, C.PBM_SETPOS, C.WPARAM(percent), 0)
}
const (
// via http://msdn.microsoft.com/en-us/library/windows/desktop/dn742486.aspx
// this is the double-width option
progressbarWidth = 237
progressbarHeight = 8
)
func (p *progressbar) xpreferredSize(d *sizing) (width, height int) {
return fromdlgunitsX(progressbarWidth, d), fromdlgunitsY(progressbarHeight, d)
}
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