zenity/progress_windows.go

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package zenity
import (
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"context"
"sync"
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"syscall"
"unsafe"
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)
func progress(opts options) (ProgressDialog, error) {
if opts.title == nil {
opts.title = stringPtr("")
}
if opts.okLabel == nil {
opts.okLabel = stringPtr("OK")
}
if opts.cancelLabel == nil {
opts.cancelLabel = stringPtr("Cancel")
}
if opts.maxValue == 0 {
opts.maxValue = 100
}
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if opts.ctx == nil {
opts.ctx = context.Background()
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} else if cerr := opts.ctx.Err(); cerr != nil {
return nil, cerr
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}
dlg := &progressDialog{
done: make(chan struct{}),
max: opts.maxValue,
}
dlg.init.Add(1)
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go func() {
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dlg.err = dlg.setup(opts)
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close(dlg.done)
}()
dlg.init.Wait()
return dlg, nil
}
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type progressDialog struct {
init sync.WaitGroup
done chan struct{}
max int
err error
wnd uintptr
textCtl uintptr
progCtl uintptr
okBtn uintptr
cancelBtn uintptr
extraBtn uintptr
font font
}
func (d *progressDialog) Text(text string) error {
select {
default:
setWindowText.Call(d.textCtl, strptr(text))
return nil
case <-d.done:
return d.err
}
}
func (d *progressDialog) Value(value int) error {
select {
default:
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sendMessage.Call(d.progCtl, _PBM_SETPOS, uintptr(value), 0)
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if value >= d.max {
enableWindow.Call(d.okBtn, 1)
}
return nil
case <-d.done:
return d.err
}
}
func (d *progressDialog) MaxValue() int {
return d.max
}
func (d *progressDialog) Done() <-chan struct{} {
return d.done
}
func (d *progressDialog) Complete() error {
select {
default:
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setWindowLong.Call(d.progCtl, intptr(_GWL_STYLE), _WS_CHILD|_WS_VISIBLE|_PBS_SMOOTH)
sendMessage.Call(d.progCtl, _PBM_SETRANGE32, 0, 1)
sendMessage.Call(d.progCtl, _PBM_SETPOS, 1, 0)
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enableWindow.Call(d.okBtn, 1)
enableWindow.Call(d.cancelBtn, 0)
return nil
case <-d.done:
return d.err
}
}
func (d *progressDialog) Close() error {
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sendMessage.Call(d.wnd, _WM_SYSCOMMAND, _SC_CLOSE, 0)
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<-d.done
if d.err == ErrCanceled {
return nil
}
return d.err
}
func (dlg *progressDialog) setup(opts options) error {
done := false
defer func() {
if !done {
dlg.init.Done()
}
}()
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defer setup()()
dlg.font = getFont()
defer dlg.font.delete()
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if opts.ctx != nil && opts.ctx.Err() != nil {
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return opts.ctx.Err()
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}
instance, _, err := getModuleHandle.Call(0)
if instance == 0 {
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return err
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}
cls, err := registerClass(instance, syscall.NewCallback(progressProc))
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if cls == 0 {
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return err
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}
defer unregisterClass.Call(cls, instance)
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dlg.wnd, _, _ = createWindowEx.Call(_WS_EX_CONTROLPARENT|_WS_EX_WINDOWEDGE|_WS_EX_DLGMODALFRAME,
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cls, strptr(*opts.title),
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_WS_POPUPWINDOW|_WS_CLIPSIBLINGS|_WS_DLGFRAME,
_CW_USEDEFAULT, _CW_USEDEFAULT,
281, 133, 0, 0, instance, uintptr(unsafe.Pointer(dlg)))
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dlg.textCtl, _, _ = createWindowEx.Call(0,
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strptr("STATIC"), 0,
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_WS_CHILD|_WS_VISIBLE|_WS_GROUP|_SS_WORDELLIPSIS|_SS_EDITCONTROL|_SS_NOPREFIX,
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12, 10, 241, 16, dlg.wnd, 0, instance, 0)
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var flags uintptr = _WS_CHILD | _WS_VISIBLE | _PBS_SMOOTH
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if opts.maxValue < 0 {
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flags |= _PBS_MARQUEE
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}
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dlg.progCtl, _, _ = createWindowEx.Call(0,
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strptr(_PROGRESS_CLASS),
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0, flags,
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12, 30, 241, 16, dlg.wnd, 0, instance, 0)
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dlg.okBtn, _, _ = createWindowEx.Call(0,
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strptr("BUTTON"), strptr(*opts.okLabel),
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_WS_CHILD|_WS_VISIBLE|_WS_GROUP|_WS_TABSTOP|_BS_DEFPUSHBUTTON|_WS_DISABLED,
12, 58, 75, 24, dlg.wnd, _IDOK, instance, 0)
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if !opts.noCancel {
dlg.cancelBtn, _, _ = createWindowEx.Call(0,
strptr("BUTTON"), strptr(*opts.cancelLabel),
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_WS_CHILD|_WS_VISIBLE|_WS_GROUP|_WS_TABSTOP,
12, 58, 75, 24, dlg.wnd, _IDCANCEL, instance, 0)
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}
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if opts.extraButton != nil {
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dlg.extraBtn, _, _ = createWindowEx.Call(0,
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strptr("BUTTON"), strptr(*opts.extraButton),
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_WS_CHILD|_WS_VISIBLE|_WS_GROUP|_WS_TABSTOP,
12, 58, 75, 24, dlg.wnd, _IDNO, instance, 0)
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}
dlg.layout(getDPI(dlg.wnd))
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centerWindow(dlg.wnd)
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showWindow.Call(dlg.wnd, _SW_NORMAL, 0)
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if opts.maxValue < 0 {
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sendMessage.Call(dlg.progCtl, _PBM_SETMARQUEE, 1, 0)
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} else {
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sendMessage.Call(dlg.progCtl, _PBM_SETRANGE32, 0, uintptr(opts.maxValue))
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}
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dlg.init.Done()
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done = true
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if opts.ctx != nil {
wait := make(chan struct{})
defer close(wait)
go func() {
select {
case <-opts.ctx.Done():
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sendMessage.Call(dlg.wnd, _WM_SYSCOMMAND, _SC_CLOSE, 0)
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case <-wait:
}
}()
}
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if err := messageLoop(dlg.wnd); err != nil {
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return err
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}
if opts.ctx != nil && opts.ctx.Err() != nil {
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return opts.ctx.Err()
}
return dlg.err
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}
func (d *progressDialog) layout(dpi dpi) {
font := d.font.forDPI(dpi)
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sendMessage.Call(d.textCtl, _WM_SETFONT, font, 1)
sendMessage.Call(d.okBtn, _WM_SETFONT, font, 1)
sendMessage.Call(d.cancelBtn, _WM_SETFONT, font, 1)
sendMessage.Call(d.extraBtn, _WM_SETFONT, font, 1)
setWindowPos.Call(d.wnd, 0, 0, 0, dpi.scale(281), dpi.scale(133), _SWP_NOZORDER|_SWP_NOMOVE)
setWindowPos.Call(d.textCtl, 0, dpi.scale(12), dpi.scale(10), dpi.scale(241), dpi.scale(16), _SWP_NOZORDER)
setWindowPos.Call(d.progCtl, 0, dpi.scale(12), dpi.scale(30), dpi.scale(241), dpi.scale(16), _SWP_NOZORDER)
if d.extraBtn == 0 {
if d.cancelBtn == 0 {
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setWindowPos.Call(d.okBtn, 0, dpi.scale(178), dpi.scale(58), dpi.scale(75), dpi.scale(24), _SWP_NOZORDER)
} else {
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setWindowPos.Call(d.okBtn, 0, dpi.scale(95), dpi.scale(58), dpi.scale(75), dpi.scale(24), _SWP_NOZORDER)
setWindowPos.Call(d.cancelBtn, 0, dpi.scale(178), dpi.scale(58), dpi.scale(75), dpi.scale(24), _SWP_NOZORDER)
}
} else {
if d.cancelBtn == 0 {
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setWindowPos.Call(d.okBtn, 0, dpi.scale(95), dpi.scale(58), dpi.scale(75), dpi.scale(24), _SWP_NOZORDER)
setWindowPos.Call(d.extraBtn, 0, dpi.scale(178), dpi.scale(58), dpi.scale(75), dpi.scale(24), _SWP_NOZORDER)
} else {
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setWindowPos.Call(d.okBtn, 0, dpi.scale(12), dpi.scale(58), dpi.scale(75), dpi.scale(24), _SWP_NOZORDER)
setWindowPos.Call(d.extraBtn, 0, dpi.scale(95), dpi.scale(58), dpi.scale(75), dpi.scale(24), _SWP_NOZORDER)
setWindowPos.Call(d.cancelBtn, 0, dpi.scale(178), dpi.scale(58), dpi.scale(75), dpi.scale(24), _SWP_NOZORDER)
}
}
}
func progressProc(wnd uintptr, msg uint32, wparam uintptr, lparam *unsafe.Pointer) uintptr {
var dlg *progressDialog
switch msg {
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case _WM_NCCREATE:
saveBackRef(wnd, *lparam)
dlg = (*progressDialog)(*lparam)
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case _WM_NCDESTROY:
deleteBackRef(wnd)
default:
dlg = (*progressDialog)(loadBackRef(wnd))
}
switch msg {
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case _WM_DESTROY:
postQuitMessage.Call(0)
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case _WM_CLOSE:
dlg.err = ErrCanceled
destroyWindow.Call(wnd)
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case _WM_COMMAND:
switch wparam {
default:
return 1
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case _IDOK, _IDYES:
//
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case _IDCANCEL:
dlg.err = ErrCanceled
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case _IDNO:
dlg.err = ErrExtraButton
}
destroyWindow.Call(wnd)
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case _WM_DPICHANGED:
dlg.layout(dpi(uint32(wparam) >> 16))
default:
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res, _, _ := defWindowProc.Call(wnd, uintptr(msg), wparam, uintptr(unsafe.Pointer(lparam)))
return res
}
return 0
}