如何绘制棋盘格图案?

问题描述

您好，我正在尝试在Windows窗体上绘制一个棋盘格图案.我正在使用以下代码，但这意味着只要重新绘制窗口(例如将鼠标悬停在按钮上)，就会导致图案被重新绘制和闪烁.有没有更好的方法来实现这一目标?

绘制棋盘格的代码是:

Hi, I am trying to draw a checkerboard pattern onto my windows form. I am using the following code but it means that whenever the window gets repainted (e.g. hover over a button) it causes the pattern to be redrawn and flicker. Is there a better way to achieve this?

The code to draw the checkerboard is:

private void drawBoard(Graphics g) {
    bool dark = true;
    for (int i = 0; i < 8; i++) {
        dark = !dark;
        for (int j = 0; j < 8; j++) {
            dark = !dark;

            Pen blackPen = new Pen(Color.Black, 2);
            SolidBrush brush;
            if (dark) {
                brush = new SolidBrush(Color.LightGray);
            } else {
                brush = new SolidBrush(Color.Gray);
            }

            int x = 50 * i + 10;
            int y = 50 * j + 10;
            int width = 50;
            int height = 50;
            // Draw rectangle to screen.
            g.DrawRectangle(blackPen, x, y, width, height);
            g.FillRectangle(brush, x, y, width, height);
        }
    }
} 

调用Paint事件处理程序时，主要形式只是调用此函数.

The main form just calls this function when the Paint event handler is called.

推荐答案

internal class MyControl : Control {
    internal MyControl() { DoubleBuffered = true; }
    //...
}

另外，与闪烁无关，但有助于提高性能:更改图形中的某些内容时，要触发控件的Paint事件，您将需要调用Control.Invalidate.代替通常没有参数的Invalidate，将Invalidate与参数一起使用，可使您仅使场景的修改部分无效.


帮个忙，使用自定义Control进行绘画(如上所示，属于子类)，而不是Form.使用Form，您将失去灵活性.

-SA

Also, something not related to flicker, but helpful to improve performance: when you change something in graphics, to trigger control''s Paint event you will need to call Control.Invalidate. Instead of usual parameter-less Invalidate use Invalidate with parameters, which allows you to invalidate only a modified part of the scene.


Do yourself a favor, use custom Control for painting (sub-classed as I show above), not Form. With Form you loose bit chunk of flexibility.

—SA

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