Question

我已经使用Windows用户组件（user32.dll）开发了一个C＃.NET WindowsForms应用程序，每次用户更改焦点时都会保存活动窗口的标题（具有焦点的窗口）。

现在我打算在Linux上使用Mono C＃做同样的事情。有可能吗？

如果是的话，我正在寻找什么？

Answer 1

我决定查看具有此类功能的gnome-screenshot的来源（仅截取活动窗口的屏幕截图）：

static GdkWindow *
screenshot_find_active_window (void)
{
  GdkWindow *window;
  GdkScreen *default_screen;

  default_screen = gdk_screen_get_default ();
  window = gdk_screen_get_active_window (default_screen);

  return window;
}

当上面没有返回任何内容时，它有一些逻辑可以回退到'鼠标指针下的窗口'：

GdkWindow *
do_find_current_window (void)
{
  GdkWindow *current_window;
  GdkDeviceManager *manager;
  GdkDevice *device;

  current_window = screenshot_find_active_window ();
  manager = gdk_display_get_device_manager (gdk_display_get_default ());
  device = gdk_device_manager_get_client_pointer (manager);

  /* If there's no active window, we fall back to returning the
   * window that the cursor is in.
   */
  if (!current_window)
    current_window = gdk_device_get_window_at_position (device, NULL, NULL);

  if (current_window)
    {
      if (screenshot_window_is_desktop (current_window))
    /* if the current window is the desktop (e.g. nautilus), we
     * return NULL, as getting the whole screen makes more sense.
         */
        return NULL;

      /* Once we have a window, we take the toplevel ancestor. */
      current_window = gdk_window_get_toplevel (current_window);
    }

  return current_window;
}

据我所知，所有上述内容都取决于libgdk-pixbuf。如果这不是一个选项，你可以随时查看Gdk源代码中这些函数的实现。

如何获取有关使用Mono C关注Linux的窗口的信息＃

1 个答案: