获取 X11 窗口标题高度 [英] Get X11 window caption height

问题描述

如何在 X11 中获取窗口的标题/标题高度?我正在使用以下内容来获取边框厚度:

XWindowAttributes wndattr;::XGetWindowAttributes(display, wnd, &wndattr)... = lWndAttr->border_width;

对于标题栏，我似乎找不到任何直截了当的内容.(这个答案似乎暗示我需要通过一种字体，但那不可能是对的，对吧?)

解决方案

答案实际上取决于所使用的窗口管理器，但大多数 WM 将目标窗口重新设置为框架的子窗口，因此算法将是:

• 走到父窗口，直到到达 root.root 之前的可能是框架
• 将目标窗口矩形与框架矩形进行比较.框架顶部减去目标顶部会给你标题高度

How can I get the title/caption height of a window in X11? I'm using the following to get the border thickness:

XWindowAttributes wndattr;
::XGetWindowAttributes(display, wnd, &wndattr)
... = lWndAttr->border_width;

I can't seem to find anything as straight-forward for the title bar. (This answer seems to imply I need to go through a font, but that can't be right, right?)

解决方案

The answers depends really on the window managers used, but most of the WMs reparent target windows to be child of a frame, so the algorithm would be:

• walk to parent windows until you reach root. The one before root is likely frame
• compare your target window rectangle with frame rectangle. Frame top minus target top would give you caption height

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