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不断重新粉刷时画布闪烁

[英]Canvas blinks when constantly repainting

原文 2010-11-17 11:00:22 8 2 java

I'm making an app which contains a java.awt.Canvas to display a sequence of conected nodes like in a graph. 我正在创建一个包含java.awt.Canvas的应用程序，以显示一系列连接节点，如图中所示。 while editing, the last dot is conected to the mouse cursor with a java.awt.geom.Line2D so that it must be repainted everytime the user moves the mouse, and it causes a really disgusting -flashy- effect on screen. 在编辑时，最后一个点用java.awt.geom.Line2D连接到鼠标光标，这样每次用户移动鼠标时都必须重新绘制它，这会在屏幕上产生一种非常令人作呕的闪烁效果。

I did this once before, and I know the solution was so easy and didn't need a really hard code, but to mess around with paint(g) , repaint(g) and update(g) methods, despite it, I cannot manage to solve it and hope someone can help me! 之前我做过这个，我知道解决方案非常简单并且不需要真正的硬代码，但要乱涂paint(g) ， repaint(g)和update(g)方法，尽管如此，我不能设法解决它，希望有人能帮助我！

Lots of thanks in advance!! 非常感谢提前!! :) :)

2 个解决方案

You need to do Double Buffering to get rid of the flickering. 你需要做双缓冲来摆脱闪烁。 Loads of examples if you google for it. 如果你谷歌的话，大量的例子。

Found a previous question that has more info. 找到一个有更多信息的上一个问题。 Here is another example . 这是另一个例子。

Here is a tutorial on double buffering http://download.oracle.com/javase/tutorial/extra/fullscreen/doublebuf.html 这是一个关于双缓冲的教程http://download.oracle.com/javase/tutorial/extra/fullscreen/doublebuf.html

The idea is basically that you draw to an offscreen image, then once you are finished drawing the entire image you paint that image to the screen. 这个想法基本上是你绘制到一个屏幕外的图像，然后一旦你完成绘制整个图像，你将该图像绘制到屏幕上。