时间：2019-03-07 标签：c#CF、WinForms和双缓冲区

发布于 2024-07-14 18:17:14 字数 122 浏览 10 评论 0原文

我有一个 CF 2.0 应用程序，表单上有一个 PictureBox。我想用鼠标移动来移动 PictureBox，并且需要向表单添加双缓冲区以避免闪烁。

我怎样才能做到这一点？

谢谢！

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弥枳 2024-07-21 18:17:14

您不需要 Form 双缓冲，您需要 PB 双缓冲。这在CF里可不是那么容易做到的。但是，您可以创建自己的控件，PB 非常简单。例如：

using System;
using System.Drawing;
using System.Windows.Forms;

public class MyPictureBox : Control {
  private Image mImage;
  public Image Image {
    get { return mImage; }
    set { mImage = value; Invalidate(); }
  }
  protected override void OnPaintBackground(PaintEventArgs pevent) {
    // Do nothing
  }
  protected override void OnPaint(PaintEventArgs e) {
    using (Bitmap bmp = new Bitmap(this.ClientSize.Width, this.ClientSize.Height)) {
      using (Graphics bgr = Graphics.FromImage(bmp)) {
        bgr.Clear(this.BackColor);
        if (mImage != null) bgr.DrawImage(mImage, 0, 0);
      }
      e.Graphics.DrawImage(bmp, 0, 0);
    }
    base.OnPaint(e);
  }
}

希望我没有使用 CF 中没有的东西......

You don't need the Form double-buffered, you need the PB to be. That's not so easy to come by in CF. However, you could create your own control, PB is pretty simple. For example:

using System;
using System.Drawing;
using System.Windows.Forms;

public class MyPictureBox : Control {
  private Image mImage;
  public Image Image {
    get { return mImage; }
    set { mImage = value; Invalidate(); }
  }
  protected override void OnPaintBackground(PaintEventArgs pevent) {
    // Do nothing
  }
  protected override void OnPaint(PaintEventArgs e) {
    using (Bitmap bmp = new Bitmap(this.ClientSize.Width, this.ClientSize.Height)) {
      using (Graphics bgr = Graphics.FromImage(bmp)) {
        bgr.Clear(this.BackColor);
        if (mImage != null) bgr.DrawImage(mImage, 0, 0);
      }
      e.Graphics.DrawImage(bmp, 0, 0);
    }
    base.OnPaint(e);
  }
}

Hopefully, I didn't use stuff that isn't available in CF...

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