Function ShowQuery

src/misc_gui.cpp:1204–1221

* Show a confirmation window with standard 'yes' and 'no' buttons * The window is aligned to the centre of its parent. * @param caption string shown as window caption * @param message string that will be shown for the window * @param parent pointer to parent window, if this pointer is nullptr the parent becomes * the main window WC_MAIN_WINDOW * @param callback callback function pointer to s

 * @param focus whether the window should be focussed (by default false)
 */
void ShowQuery(EncodedString &&caption, EncodedString &&message, Window *parent, QueryCallbackProc *callback, bool focus)
{
	if (parent == nullptr) parent = GetMainWindow();

	for (Window *w : Window::Iterate()) {
		if (w->window_class != WC_CONFIRM_POPUP_QUERY) continue;

		QueryWindow *qw = dynamic_cast<QueryWindow *>(w);
		assert(qw != nullptr);
		if (qw->parent != parent || qw->proc != callback) continue;

		qw->Close();
		break;
	}

	QueryWindow *q = new QueryWindow(_query_desc, std::move(caption), std::move(message), parent, callback);
	if (focus) SetFocusedWindow(q);
}