用wxpython进行双缓冲 [英] Double buffering with wxpython

问题描述

我正在使用wxpython开发一个多平台应用程序，在Panel上绘图时，在Windows上出现了闪烁问题. 我曾经在鼠标移动事件期间在缓冲区(wx.Bitmap)上绘制，而我的OnPaint方法仅由在线组成:

I'm working on an multiplatform application with wxpython and I had flickering problems on windows, while drawing on a Panel. I used to draw on a buffer (wx.Bitmap) during mouse motions events and my OnPaint method was composed of just on line:

dc = wx.BufferedPaintDC(self, self.buffer)

相当标准，但是在Windows上我仍然有闪烁的问题，而在Linux上一切正常.

Pretty standard but still I had flickering problems on Windows, while everything worked fine on Linux.

我解决了我的问题，在__init__方法中调用了SetDoubleBuffered(True).

奇怪的是，即使我不再使用BufferedPaintDC，现在一切都可以使用.我更改了应用程序，以便所有绘图部分都在OnPaint方法中完成.我不使用缓冲区，而是直接在wx.PaintDC上完成绘制，完全没有闪烁问题.

The strange thing is that now everything works even if I don't use BufferedPaintDC anymore. I changed my application so that all the drawing part is done in the OnPaint method. I don't use a buffer and drawing is done directly on a wx.PaintDC with no flickering problems at all.

所以我的问题是:BufferedPaintDC完全没用吗?还是不赞成使用?我是《 WxPython in Action》(2006年)一书的所有者，甚至没有提到SetDoubleBuffered

So my question is: is BufferedPaintDC totally useless? Or deprecated somehow? I'm owner of the book "WxPython in Action" (2006) and it doesn't even mention SetDoubleBuffered

推荐答案

很有可能SetDoubleBuffered实际上使您的面板自动使用缓冲的dc，文档中没有提到那些类已被弃用(我宁愿认为是这样的话.

There is a high probability that the SetDoubleBuffered actually makes your panel use a buffered dc automatically, the documentation doesn't mention that those classes are deprecated (and I rather think they would if that were the case).

关于wxPython的实际应用...很久以前，2006年...当时可能还没有SetDoubleBuffered方法，或者作者想展示下层的工作原理.

About wxPython in Action... 2006 was a long time ago... it is possible that the SetDoubleBuffered method didn't exist back then or that the author wanted to show how things work at the lower level.

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