示例#1
0
文件: webview.go 项目: wangch/walk
func (wv *WebView) Dispose() {
	if wv.browserObject != nil {
		wv.browserObject.Close(win.OLECLOSE_NOSAVE)
		wv.browserObject.Release()

		wv.browserObject = nil

		win.OleUninitialize()
	}

	wv.WidgetBase.Dispose()
}
示例#2
0
func (dlg *FileDialog) ShowBrowseFolder(owner Form) (accepted bool, err error) {
	// Calling OleInitialize (or similar) is required for BIF_NEWDIALOGSTYLE.
	if hr := win.OleInitialize(); hr != win.S_OK && hr != win.S_FALSE {
		return false, newError(fmt.Sprint("OleInitialize Error: ", hr))
	}
	defer win.OleUninitialize()

	pathFromPIDL := func(pidl uintptr) (string, error) {
		var path [win.MAX_PATH]uint16
		if !win.SHGetPathFromIDList(pidl, &path[0]) {
			return "", newError("SHGetPathFromIDList failed")
		}

		return syscall.UTF16ToString(path[:]), nil
	}

	// We use this callback to disable the OK button in case of "invalid"
	// selections.
	callback := func(hwnd win.HWND, msg uint32, lp, wp uintptr) uintptr {
		const BFFM_SELCHANGED = 2
		if msg == BFFM_SELCHANGED {
			_, err := pathFromPIDL(lp)
			var enabled uintptr
			if err == nil {
				enabled = 1
			}

			const BFFM_ENABLEOK = win.WM_USER + 101

			win.SendMessage(hwnd, BFFM_ENABLEOK, 0, enabled)
		}

		return 0
	}

	var ownerHwnd win.HWND
	if owner != nil {
		ownerHwnd = owner.Handle()
	}

	// We need to put the initial path into a buffer of at least MAX_LENGTH
	// length, or we may get random crashes.
	var buf [win.MAX_PATH]uint16
	copy(buf[:], syscall.StringToUTF16(dlg.InitialDirPath))

	const BIF_NEWDIALOGSTYLE = 0x00000040

	bi := win.BROWSEINFO{
		HwndOwner:      ownerHwnd,
		PszDisplayName: &buf[0],
		LpszTitle:      syscall.StringToUTF16Ptr(dlg.Title),
		UlFlags:        BIF_NEWDIALOGSTYLE,
		Lpfn:           syscall.NewCallback(callback),
	}

	pidl := win.SHBrowseForFolder(&bi)
	if pidl == 0 {
		return false, nil
	}
	defer win.CoTaskMemFree(pidl)

	dlg.FilePath, err = pathFromPIDL(pidl)
	accepted = dlg.FilePath != ""
	return
}