我有一个程序可以在GtkEntry
(sscce代码here)下打开一个窗口。程序运行时,这是它的窗口:
当我点击“打开”按钮时,一个未装饰的窗口将在条目的正下方打开,而的左侧与条目的左侧对齐:
这是按钮的以下回调方法的结果,它接收条目作为回调参数:
bool on_button_clicked(GtkWidget *button, gpointer data) {
GtkWidget *entry = data,
*subwindow = gtk_window_new(GTK_WINDOW_TOPLEVEL),
*sublabel = gtk_label_new("This is a rather long message\n"
"with many lines whose mere purpose is\n"
"to test some stuff. It will appear in \n"
"the RIGHT PLACE.");
gtk_container_add(GTK_CONTAINER(subwindow), sublabel);
gtk_window_set_decorated(GTK_WINDOW(subwindow), FALSE);
gtk_window_set_modal(GTK_WINDOW(subwindow), TRUE);
GtkWidget *window = gtk_widget_get_toplevel(entry);
gtk_window_set_transient_for(
GTK_WINDOW(subwindow), GTK_WINDOW(window));
gint dx, dy;
gtk_window_get_position(GTK_WINDOW(window), &dx, &dy);
GtkAllocation allocation;
gtk_widget_get_allocation(entry, &allocation);
gtk_window_move(
GTK_WINDOW(subwindow),
allocation.x+dx, allocation.y+allocation.height*2+dy);
gtk_widget_show_all(subwindow);
return false;
}
当我从表视图开始编辑单元格时,我想做类似的事情,特别是如果单元格在第二列中。未修饰的窗口应出现在编辑单元格的下方,与其左侧对齐。所以我创建了一个回调"editing-started"
事件,假设回调的editable
参数是一个小部件:
static bool on_cell_renderer_text_editing_started(
GtkCellRenderer *renderer, GtkCellEditable *editable,
gchar *path, gpointer data) {
GtkWidget *subwindow = gtk_window_new(GTK_WINDOW_TOPLEVEL),
*sublabel = gtk_label_new("This is a rather long message\n"
"with many lines whose mere purpose is\n"
"to test some stuff. It will appear in\n"
"the WRONG PLACE!");
gtk_container_add(GTK_CONTAINER(subwindow), sublabel);
gtk_window_set_decorated(GTK_WINDOW(subwindow), FALSE);
gtk_window_set_modal(GTK_WINDOW(subwindow), TRUE);
GdkWindow *window = gtk_widget_get_window(GTK_WIDGET(editable));
gtk_window_set_transient_for(
GTK_WINDOW(subwindow), GTK_WINDOW(window));
gint dx, dy;
gtk_window_get_position(GTK_WINDOW(window), &dx, &dy);
GtkAllocation allocation;
gtk_widget_get_allocation(GTK_WIDGET(editable), &allocation);
gtk_window_move(
GTK_WINDOW(subwindow),
allocation.x+dx, allocation.y+allocation.height*2+dy);
gtk_widget_show_all(subwindow);
return false;
}
结果不是我的预期。未修饰的窗口出现在各个地方,通常位于屏幕的左上角:
另外,我得到了这个(非常有启发性但是死胡同)的警告:
(teste-subwindow-under-entry:32300):Gtk-CRITICAL **:IA__gtk_window_get_position:断言`GTK_IS_WINDOW(窗口)'失败
我尝试了其他一些方法(例如,用gdk_window_get_geometry()
获取第一个窗口的尺寸)但没有一个工作(我并不感到惊讶,因为它们只是盲目的尝试)。
那么,我怎样才能打开特定单元格渲染器下的未修饰窗口?