使用 wxpython 进行双缓冲
我正在使用 wxpython 开发一个多平台应用程序,并且在面板上绘图时在 Windows 上遇到闪烁问题。 我曾经在鼠标移动事件期间在缓冲区(wx.Bitmap)上绘图,我的 OnPaint 方法仅由在线组成:
dc = wx.BufferedPaintDC(self, self.buffer)
相当标准,但我在 Windows 上仍然遇到闪烁问题,而在 Linux 上一切正常。
我在 __init__
方法中调用 SetDoubleBuffered(True)
解决了我的问题。
奇怪的是,即使我不再使用 BufferedPaintDC,现在一切正常。 我更改了我的应用程序,以便所有绘图部分都在 OnPaint 方法中完成。 我不使用缓冲区,直接在 wx.PaintDC 上进行绘图,完全没有闪烁问题。
所以我的问题是:BufferedPaintDC 完全没用吗? 或者以某种方式被弃用? 我是《WxPython in Action》(2006 年)一书的所有者,它甚至没有提到 SetDoubleBuffered
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)
Pretty standard but still I had flickering problems on Windows, while everything worked fine on Linux.
I solved my problem calling SetDoubleBuffered(True)
in the __init__
method.
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.
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
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SetDoubleBuffered 实际上使您的面板自动使用缓冲 dc 的可能性很高,文档中没有提到这些类已被弃用(我宁愿认为如果是这种情况它们也会这样做)。
关于 wxPython in Action...2006 年已经是很久以前的事了...SetDoubleBuffered 方法可能当时还不存在,或者作者想展示底层是如何工作的。
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).
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.