zenity/date_windows.go

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package zenity
import (
"syscall"
"time"
"unsafe"
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"github.com/ncruces/zenity/internal/win"
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)
func calendar(text string, opts options) (time.Time, error) {
if opts.title == nil {
opts.title = stringPtr("")
}
if opts.okLabel == nil {
opts.okLabel = stringPtr("OK")
}
if opts.cancelLabel == nil {
opts.cancelLabel = stringPtr("Cancel")
}
dlg := &calendarDialog{}
return dlg.setup(text, opts)
}
type calendarDialog struct {
out time.Time
err error
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wnd win.HWND
textCtl win.HWND
dateCtl win.HWND
okBtn win.HWND
cancelBtn win.HWND
extraBtn win.HWND
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font font
}
func (dlg *calendarDialog) setup(text string, opts options) (time.Time, error) {
defer setup()()
dlg.font = getFont()
defer dlg.font.delete()
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icon := getIcon(opts.windowIcon)
defer icon.delete()
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if opts.ctx != nil && opts.ctx.Err() != nil {
return time.Time{}, opts.ctx.Err()
}
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instance, err := win.GetModuleHandle(nil)
if err != nil {
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return time.Time{}, err
}
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cls, err := registerClass(instance, icon.handle, syscall.NewCallback(calendarProc))
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if err != nil {
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return time.Time{}, err
}
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defer win.UnregisterClass(cls, instance)
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owner, _ := opts.attach.(win.HWND)
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dlg.wnd, _ = win.CreateWindowEx(_WS_EX_ZEN_DIALOG,
cls, strptr(*opts.title), _WS_ZEN_DIALOG,
win.CW_USEDEFAULT, win.CW_USEDEFAULT,
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281, 281, owner, 0, instance, unsafe.Pointer(dlg))
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dlg.textCtl, _ = win.CreateWindowEx(0,
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strptr("STATIC"), strptr(text), _WS_ZEN_LABEL,
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12, 10, 241, 16, dlg.wnd, 0, instance, nil)
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dlg.dateCtl, _ = win.CreateWindowEx(0,
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strptr(win.MONTHCAL_CLASS),
nil, _WS_ZEN_CONTROL|win.MCS_NOTODAY,
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12, 30, 241, 164, dlg.wnd, 0, instance, nil)
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dlg.okBtn, _ = win.CreateWindowEx(0,
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strptr("BUTTON"), strptr(*opts.okLabel),
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_WS_ZEN_BUTTON|win.BS_DEFPUSHBUTTON,
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12, 206, 75, 24, dlg.wnd, win.IDOK, instance, nil)
dlg.cancelBtn, _ = win.CreateWindowEx(0,
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strptr("BUTTON"), strptr(*opts.cancelLabel),
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_WS_ZEN_BUTTON,
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12, 206, 75, 24, dlg.wnd, win.IDCANCEL, instance, nil)
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if opts.extraButton != nil {
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dlg.extraBtn, _ = win.CreateWindowEx(0,
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strptr("BUTTON"), strptr(*opts.extraButton),
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_WS_ZEN_BUTTON,
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12, 206, 75, 24, dlg.wnd, win.IDNO, instance, nil)
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}
if opts.time != nil {
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var date win.SYSTEMTIME
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year, month, day := opts.time.Date()
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date.Year = uint16(year)
date.Month = uint16(month)
date.Day = uint16(day)
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win.SendMessagePointer(dlg.dateCtl, win.MCM_SETCURSEL, 0, unsafe.Pointer(&date))
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}
dlg.layout(getDPI(dlg.wnd))
centerWindow(dlg.wnd)
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win.SetFocus(dlg.dateCtl)
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win.ShowWindow(dlg.wnd, win.SW_NORMAL)
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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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win.SendMessage(dlg.wnd, win.WM_SYSCOMMAND, win.SC_CLOSE, 0)
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case <-wait:
}
}()
}
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if err := win.MessageLoop(win.HWND(dlg.wnd)); err != nil {
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return time.Time{}, err
}
if opts.ctx != nil && opts.ctx.Err() != nil {
return time.Time{}, opts.ctx.Err()
}
return dlg.out, dlg.err
}
func (dlg *calendarDialog) layout(dpi dpi) {
font := dlg.font.forDPI(dpi)
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win.SendMessage(dlg.textCtl, win.WM_SETFONT, font, 1)
win.SendMessage(dlg.dateCtl, win.WM_SETFONT, font, 1)
win.SendMessage(dlg.okBtn, win.WM_SETFONT, font, 1)
win.SendMessage(dlg.cancelBtn, win.WM_SETFONT, font, 1)
win.SendMessage(dlg.extraBtn, win.WM_SETFONT, font, 1)
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win.SetWindowPos(dlg.wnd, 0, 0, 0, dpi.scale(281), dpi.scale(281), win.SWP_NOMOVE|win.SWP_NOZORDER)
win.SetWindowPos(dlg.textCtl, 0, dpi.scale(12), dpi.scale(10), dpi.scale(241), dpi.scale(16), win.SWP_NOZORDER)
win.SetWindowPos(dlg.dateCtl, 0, dpi.scale(12), dpi.scale(30), dpi.scale(241), dpi.scale(164), win.SWP_NOZORDER)
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if dlg.extraBtn == 0 {
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win.SetWindowPos(dlg.okBtn, 0, dpi.scale(95), dpi.scale(206), dpi.scale(75), dpi.scale(24), win.SWP_NOZORDER)
win.SetWindowPos(dlg.cancelBtn, 0, dpi.scale(178), dpi.scale(206), dpi.scale(75), dpi.scale(24), win.SWP_NOZORDER)
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} else {
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win.SetWindowPos(dlg.okBtn, 0, dpi.scale(12), dpi.scale(206), dpi.scale(75), dpi.scale(24), win.SWP_NOZORDER)
win.SetWindowPos(dlg.extraBtn, 0, dpi.scale(95), dpi.scale(206), dpi.scale(75), dpi.scale(24), win.SWP_NOZORDER)
win.SetWindowPos(dlg.cancelBtn, 0, dpi.scale(178), dpi.scale(206), dpi.scale(75), dpi.scale(24), win.SWP_NOZORDER)
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}
}
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func calendarProc(wnd win.HWND, msg uint32, wparam uintptr, lparam *unsafe.Pointer) uintptr {
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var dlg *calendarDialog
switch msg {
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case win.WM_NCCREATE:
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saveBackRef(uintptr(wnd), *lparam)
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dlg = (*calendarDialog)(*lparam)
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case win.WM_NCDESTROY:
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deleteBackRef(uintptr(wnd))
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default:
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dlg = (*calendarDialog)(loadBackRef(uintptr(wnd)))
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}
switch msg {
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case win.WM_DESTROY:
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win.PostQuitMessage(0)
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case win.WM_CLOSE:
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dlg.err = ErrCanceled
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win.DestroyWindow(wnd)
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case win.WM_COMMAND:
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switch wparam {
default:
return 1
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case win.IDOK, win.IDYES:
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var date win.SYSTEMTIME
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win.SendMessagePointer(dlg.dateCtl, win.MCM_GETCURSEL, 0, unsafe.Pointer(&date))
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dlg.out = time.Date(int(date.Year), time.Month(date.Month), int(date.Day), 0, 0, 0, 0, time.UTC)
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case win.IDCANCEL:
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dlg.err = ErrCanceled
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case win.IDNO:
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dlg.err = ErrExtraButton
}
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win.DestroyWindow(wnd)
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case win.WM_DPICHANGED:
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dlg.layout(dpi(uint32(wparam) >> 16))
default:
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return win.DefWindowProc(wnd, msg, wparam, unsafe.Pointer(lparam))
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}
return 0
}