245 lines
6.6 KiB
Go
245 lines
6.6 KiB
Go
package zenity
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import (
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"syscall"
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"unsafe"
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"github.com/ncruces/zenity/internal/win"
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)
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func list(text string, items []string, opts options) (string, error) {
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items, err := listDlg(text, items, false, opts)
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if len(items) == 1 {
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return items[0], err
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}
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return "", err
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}
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func listMultiple(text string, items []string, opts options) ([]string, error) {
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return listDlg(text, items, true, opts)
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}
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func listDlg(text string, items []string, multiple bool, opts options) ([]string, error) {
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if opts.title == nil {
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opts.title = ptr("")
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}
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if opts.okLabel == nil {
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opts.okLabel = ptr("OK")
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}
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if opts.cancelLabel == nil {
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opts.cancelLabel = ptr("Cancel")
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}
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dlg := &listDialog{
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items: items,
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multiple: multiple,
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disallowEmpty: opts.disallowEmpty,
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}
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return dlg.setup(text, opts)
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}
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type listDialog struct {
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items []string
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multiple bool
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disallowEmpty bool
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out []string
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err error
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wnd win.HWND
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textCtl win.HWND
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listCtl win.HWND
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okBtn win.HWND
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cancelBtn win.HWND
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extraBtn win.HWND
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font font
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}
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func (dlg *listDialog) setup(text string, opts options) ([]string, error) {
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owner, _ := opts.attach.(win.HWND)
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defer setup(owner)()
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dlg.font = getFont()
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defer dlg.font.delete()
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icon, _ := getIcon(opts.windowIcon)
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defer icon.delete()
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if opts.ctx != nil && opts.ctx.Err() != nil {
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return nil, opts.ctx.Err()
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}
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instance, err := win.GetModuleHandle(nil)
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if err != nil {
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return nil, err
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}
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cls, err := registerClass(instance, icon.handle, syscall.NewCallback(listProc))
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if err != nil {
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return nil, err
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}
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defer win.UnregisterClass(cls, instance)
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dlg.wnd, _ = win.CreateWindowEx(_WS_EX_ZEN_DIALOG,
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cls, strptr(*opts.title), _WS_ZEN_DIALOG,
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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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var flags uint32 = _WS_ZEN_CONTROL | win.WS_VSCROLL | win.LBS_NOTIFY
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if dlg.multiple {
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flags |= win.LBS_EXTENDEDSEL
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}
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dlg.listCtl, _ = win.CreateWindowEx(win.WS_EX_CLIENTEDGE,
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strptr("LISTBOX"), nil, flags,
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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(quoteAccelerators(*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)
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dlg.cancelBtn, _ = win.CreateWindowEx(0,
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strptr("BUTTON"), strptr(quoteAccelerators(*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(quoteAccelerators(*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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}
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for i, item := range dlg.items {
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win.SendMessagePointer(dlg.listCtl, win.LB_ADDSTRING, 0, unsafe.Pointer(strptr(item)))
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for _, def := range opts.defaultItems {
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if def == item {
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if dlg.multiple {
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win.SendMessage(dlg.listCtl, win.LB_SETSEL, 1, uintptr(i))
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} else {
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win.SendMessage(dlg.listCtl, win.LB_SETCURSEL, uintptr(i), 0)
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}
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}
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}
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}
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dlg.update()
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dlg.layout(getDPI(dlg.wnd))
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centerWindow(dlg.wnd)
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win.SetFocus(dlg.listCtl)
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win.ShowWindow(dlg.wnd, win.SW_NORMAL)
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if opts.ctx != nil {
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wait := make(chan struct{})
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defer close(wait)
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go func() {
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select {
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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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}
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}()
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}
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if err := win.MessageLoop(win.HWND(dlg.wnd)); err != nil {
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return nil, err
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}
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if opts.ctx != nil && opts.ctx.Err() != nil {
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return nil, opts.ctx.Err()
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}
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return dlg.out, dlg.err
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}
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func (dlg *listDialog) layout(dpi dpi) {
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font := dlg.font.forDPI(dpi)
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win.SendMessage(dlg.textCtl, win.WM_SETFONT, font, 1)
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win.SendMessage(dlg.listCtl, win.WM_SETFONT, font, 1)
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win.SendMessage(dlg.okBtn, win.WM_SETFONT, font, 1)
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win.SendMessage(dlg.cancelBtn, win.WM_SETFONT, font, 1)
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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)
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win.SetWindowPos(dlg.textCtl, 0, dpi.scale(12), dpi.scale(10), dpi.scale(241), dpi.scale(16), win.SWP_NOZORDER)
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win.SetWindowPos(dlg.listCtl, 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)
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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)
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win.SetWindowPos(dlg.extraBtn, 0, dpi.scale(95), dpi.scale(206), dpi.scale(75), dpi.scale(24), win.SWP_NOZORDER)
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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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}
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func (dlg *listDialog) update() {
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if dlg.disallowEmpty {
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var enable bool
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if dlg.multiple {
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len := win.SendMessage(dlg.listCtl, win.LB_GETSELCOUNT, 0, 0)
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enable = int32(len) > 0
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} else {
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idx := win.SendMessage(dlg.listCtl, win.LB_GETCURSEL, 0, 0)
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enable = int32(idx) >= 0
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}
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win.EnableWindow(dlg.okBtn, enable)
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}
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}
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func listProc(wnd win.HWND, msg uint32, wparam uintptr, lparam *unsafe.Pointer) uintptr {
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var dlg *listDialog
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switch msg {
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case win.WM_NCCREATE:
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saveBackRef(uintptr(wnd), *lparam)
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dlg = (*listDialog)(*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 = (*listDialog)(loadBackRef(uintptr(wnd)))
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}
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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 {
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default:
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dlg.update()
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return 1
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case win.IDOK, win.IDYES:
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if dlg.multiple {
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if len := win.SendMessage(dlg.listCtl, win.LB_GETSELCOUNT, 0, 0); int32(len) >= 0 {
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dlg.out = make([]string, len)
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if len > 0 {
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indices := make([]int32, len)
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win.SendMessagePointer(dlg.listCtl, win.LB_GETSELITEMS, len, unsafe.Pointer(&indices[0]))
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for i, idx := range indices {
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dlg.out[i] = dlg.items[idx]
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}
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}
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}
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} else {
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if idx := win.SendMessage(dlg.listCtl, win.LB_GETCURSEL, 0, 0); int32(idx) >= 0 {
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dlg.out = []string{dlg.items[idx]}
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} else {
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dlg.out = []string{}
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}
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}
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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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}
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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))
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default:
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return win.DefWindowProc(wnd, msg, wparam, unsafe.Pointer(lparam))
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}
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return 0
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}
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