Qt，调用 QPainter::drawText() 时获取文本
我有一个 QPainter 对象，并且希望获取每当调用 QPainter::drawText 时绘制的字符串，就像我可以将一个插槽连接到该信号一样（该信号不存在，所以我不能）。 最好的方法是什么？我读过一些关于使用 setProperty 方法将drawText方法重定向到自定义方法，并将其传递给drawText的指针的内容，但我从未尝试过，而且对我来说这似乎有点矫枉过正。 有人对如何获取由drawText绘制的文本字符串有更好的想法吗？
编辑：如果我们不从画家那里获取文本，而是从 PaintEngine 获取文本，那么也可以。
感谢任何帮助，谢谢
I have a QPainter object and would like to obtain the string that is drawn whenever QPainter::drawText is called, as I would if I could connect a slot to that signal (which doesn't exist, so I can't).
What would be the best way to do this? I have read some stuff about redirecting the drawText method to a custom one using the setProperty method, and passing it a pointer to drawText, but I've never tried it, and it seems like overkill to me..
Anyone have a better idea about how to obtain the String of text that is drawn by drawText?
Edit: It would also be ok if instead of getting the text form the painter, we get it from the PaintEngine
Any help is appreciated, Thanks
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我想唯一可靠的方法是子类化 QPainter，重新实现 drawText() 方法并在您自己的类中添加一些调试文本。我怀疑 QPainter 是否有任何捕获信号或其他东西的设施，因为大多数绘图方法都对速度至关重要。
I guess the only reliable way is to subclass QPainter, reimplement the drawText() method and add some debug text in your own class. I doubt QPainter has any facilities to capture a signal or something, since most of the drawing methods are speed critical.