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:
sendMessage.Call(d.progCtl, 0x402 /* PBM_SETPOS */, uintptr(value), 0)
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:
setWindowLong.Call(d.progCtl, intptr(-16) /* GWL_STYLE */, 0x50000001 /* WS_CHILD|WS_VISIBLE|PBS_SMOOTH */)
sendMessage.Call(d.progCtl, 0x406 /* PBM_SETRANGE32 */, 0, 1)
sendMessage.Call(d.progCtl, 0x402 /* PBM_SETPOS */, 1, 0)
enableWindow.Call(d.okBtn, 1)
enableWindow.Call(d.cancelBtn, 0)
return nil
case <-d.done:
return d.err
}
}
func (d *progressDialog) Close() error {
sendMessage.Call(d.wnd, 0x0112 /* WM_SYSCOMMAND */, 0xf060 /* SC_CLOSE */, 0)
<-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(0x10101, // WS_EX_CONTROLPARENT|WS_EX_WINDOWEDGE|WS_EX_DLGMODALFRAME
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cls, strptr(*opts.title),
0x84c80000, // WS_POPUPWINDOW|WS_CLIPSIBLINGS|WS_DLGFRAME
0x80000000, // CW_USEDEFAULT
0x80000000, // 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,
0x5002e080, // 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 = 0x50000001 // WS_CHILD|WS_VISIBLE|PBS_SMOOTH
if opts.maxValue < 0 {
flags |= 0x8 // PBS_MARQUEE
}
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dlg.progCtl, _, _ = createWindowEx.Call(0,
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strptr("msctls_progress32"), // PROGRESS_CLASS
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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0x58030001, // WS_CHILD|WS_VISIBLE|WS_DISABLED|WS_GROUP|WS_TABSTOP|BS_DEFPUSHBUTTON
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12, 58, 75, 24, dlg.wnd, 1 /* IDOK */, instance, 0)
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if !opts.noCancel {
dlg.cancelBtn, _, _ = createWindowEx.Call(0,
strptr("BUTTON"), strptr(*opts.cancelLabel),
0x50010000, // WS_CHILD|WS_VISIBLE|WS_GROUP|WS_TABSTOP
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12, 58, 75, 24, dlg.wnd, 2 /* 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),
0x50010000, // WS_CHILD|WS_VISIBLE|WS_GROUP|WS_TABSTOP
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12, 58, 75, 24, dlg.wnd, 7 /* IDNO */, instance, 0)
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}
dlg.layout(getDPI(dlg.wnd))
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centerWindow(dlg.wnd)
showWindow.Call(dlg.wnd, 1 /* SW_SHOWNORMAL */, 0)
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if opts.maxValue < 0 {
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sendMessage.Call(dlg.progCtl, 0x40a /* PBM_SETMARQUEE */, 1, 0)
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} else {
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sendMessage.Call(dlg.progCtl, 0x406 /* 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, 0x0112 /* WM_SYSCOMMAND */, 0xf060 /* 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)
sendMessage.Call(d.textCtl, 0x0030 /* WM_SETFONT */, font, 1)
sendMessage.Call(d.okBtn, 0x0030 /* WM_SETFONT */, font, 1)
sendMessage.Call(d.cancelBtn, 0x0030 /* WM_SETFONT */, font, 1)
sendMessage.Call(d.extraBtn, 0x0030 /* WM_SETFONT */, font, 1)
setWindowPos.Call(d.wnd, 0, 0, 0, dpi.scale(281), dpi.scale(133), 0x6) // SWP_NOZORDER|SWP_NOMOVE
setWindowPos.Call(d.textCtl, 0, dpi.scale(12), dpi.scale(10), dpi.scale(241), dpi.scale(16), 0x4) // SWP_NOZORDER
setWindowPos.Call(d.progCtl, 0, dpi.scale(12), dpi.scale(30), dpi.scale(241), dpi.scale(16), 0x4) // SWP_NOZORDER
if d.extraBtn == 0 {
if d.cancelBtn == 0 {
setWindowPos.Call(d.okBtn, 0, dpi.scale(178), dpi.scale(58), dpi.scale(75), dpi.scale(24), 0x4) // SWP_NOZORDER
} else {
setWindowPos.Call(d.okBtn, 0, dpi.scale(95), dpi.scale(58), dpi.scale(75), dpi.scale(24), 0x4) // SWP_NOZORDER
setWindowPos.Call(d.cancelBtn, 0, dpi.scale(178), dpi.scale(58), dpi.scale(75), dpi.scale(24), 0x4) // SWP_NOZORDER
}
} else {
if d.cancelBtn == 0 {
setWindowPos.Call(d.okBtn, 0, dpi.scale(95), dpi.scale(58), dpi.scale(75), dpi.scale(24), 0x4) // SWP_NOZORDER
setWindowPos.Call(d.extraBtn, 0, dpi.scale(178), dpi.scale(58), dpi.scale(75), dpi.scale(24), 0x4) // SWP_NOZORDER
} else {
setWindowPos.Call(d.okBtn, 0, dpi.scale(12), dpi.scale(58), dpi.scale(75), dpi.scale(24), 0x4) // SWP_NOZORDER
setWindowPos.Call(d.extraBtn, 0, dpi.scale(95), dpi.scale(58), dpi.scale(75), dpi.scale(24), 0x4) // SWP_NOZORDER
setWindowPos.Call(d.cancelBtn, 0, dpi.scale(178), dpi.scale(58), dpi.scale(75), dpi.scale(24), 0x4) // SWP_NOZORDER
}
}
}
func progressProc(wnd uintptr, msg uint32, wparam uintptr, lparam *unsafe.Pointer) uintptr {
var dlg *progressDialog
switch msg {
case 0x0081: // WM_NCCREATE
saveBackRef(wnd, *lparam)
dlg = (*progressDialog)(*lparam)
case 0x0082: // WM_NCDESTROY
deleteBackRef(wnd)
default:
dlg = (*progressDialog)(loadBackRef(wnd))
}
switch msg {
case 0x0002: // WM_DESTROY
postQuitMessage.Call(0)
case 0x0010: // WM_CLOSE
dlg.err = ErrCanceled
destroyWindow.Call(wnd)
case 0x0111: // WM_COMMAND
switch wparam {
default:
return 1
case 1, 6: // IDOK, IDYES
//
case 2: // IDCANCEL
dlg.err = ErrCanceled
case 7: // IDNO
dlg.err = ErrExtraButton
}
destroyWindow.Call(wnd)
case 0x02e0: // 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
}