高效的WPF绘图代码 [英] Efficient WPF drawing code

问题描述

我正在通过覆盖Canvas窗口的OnRender函数来编写自定义绘图代码. br/>
受保护的重写void OnRender(DrawingContext drawingContext)
{
base.OnRender(drawingContext);
//一堆绘图代码
}

我正在绘制的窗口在垂直方向上延伸得很远，因此将其包含在ScrollViewer中.

当系统中的数据更改时，我只想重绘表示该数据的窗口的一小部分，而不是整个窗口.但是，我似乎无法弄清楚如何使窗口的区域无效.我目前正在无效并重新绘制 整个窗口.救命！

谢谢

Aaron

---

astibich

I am writing custom drawing code by overriding the OnRender function of a Canvas window.

protected override void OnRender(DrawingContext drawingContext)
{
base.OnRender(drawingContext);
// bunch of drawing code
}

The window that I'm drawing stretches very far in the vertical direction, so I contain it in a ScrollViewer.

When data changes in the system, I want to redraw just the small portion of the window that represents that data, not the entire window. However, I can't seem to figure out how to invalidate a region of the window. I am currently invalidating and redrawing the entire window. Help!

Thanks,

Aaron

---

astibich

推荐答案

为什么不创建一个包含StackPanel这样的布局面板并包含该部分并调用无效吗?

Why don't you create a layout panel like StackPanel containing that portion and call invalidate on it?

http://msdn.microsoft.com/en -us/library/microsoft.sqlserver.management.controls.stackpanel.invalidate.aspx

 

谢谢，
穆罕默德
shujaatsiddiqi.blogspot.com

Thanks,
Muhammad
shujaatsiddiqi.blogspot.com

这篇关于高效的WPF绘图代码的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！