.NET PowerPacks RectangleShape在窗体调整大小时闪烁 [英] .NET PowerPacks RectangleShape flickers on form resize

问题描述

我可以做一些简单的事情:

I can do something as simple as:

1. 创建一个新的.NET表单应用程序
2. 将单个RectangleShape放置在表单上

3. 在设计器代码中将以下内容添加到InitializeComponent方法中

1. Create a new .NET form application
2. Put a single RectangleShape onto the form

3. add the following into the InitializeComponent method in the designer code

Me.SetStyle(ControlStyles.AllPaintingInWmPaint Or _
    ControlStyles.UserPaint Or _
    ControlStyles.DoubleBuffer, True)
Me.UpdateStyles()

运行程序

调整表单大小

愤怒地看着矩形闪烁

是否有可能摆脱这种情况?还是ShapeContainer内部有缺陷，我需要找到其他解决方案吗?

Is it possible to get rid of this? Or is the ShapeContainer internally flawed and I need to find a different solution?

推荐答案

它确实有缺陷.它使用自己的窗口，该窗口在WS_EX_TRANSPARENT样式已打开的情况下覆盖在窗体上.这种样式使其不可见，但也会阻止任何类型的双缓冲正常工作.双重缓冲表单无效，错误的窗口.

It's fairly flawed. It uses its own window that's overlaid onto the form with the WS_EX_TRANSPARENT style turned on. That style makes it invisible, but also prevents any kind of double-buffering from working properly. Double-buffering the form has no effect, wrong window.

否则，这是绘制图形的一种相当昂贵的方法.廉价且无闪烁的方法是在窗体的OnPaint()重写或Paint事件处理程序中使用e.Graphics.FillRectangle().

It is otherwise a rather expensive way to draw shapes. The cheap and flicker-free way is using e.Graphics.FillRectangle() in the form's OnPaint() override or Paint event handler.

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