我正在尝试用C#制作一个简单的画图程序,但是在绘制时它会闪烁,就像我需要某种双缓冲一样,但我不知道如何实现。
我正在一个
以下是我的代码:
我正在一个
Panel
上绘制,并使用一个Bitmap
来存储图形。以下是我的代码:
public partial class Form1 : Form
{
private Bitmap drawing;
private bool leftDown = false;
private int prevX;
private int prevY;
private int currentX;
private int currentY;
public Form1()
{
InitializeComponent();
drawing = new Bitmap(panel1.Width, panel1.Height);
}
private void panel1_MouseDown(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
leftDown = true;
prevX = e.X;
prevY = e.Y;
}
}
private void panel1_MouseMove(object sender, MouseEventArgs e)
{
if (leftDown)
{
Graphics g = Graphics.FromImage(drawing);
currentX = e.X;
currentY = e.Y;
g.DrawLine(new Pen(Color.Black), new Point(currentX, currentY), new Point(prevX, prevY));
panel1.Invalidate();
prevX = currentX;
prevY = currentY;
g.Dispose();
}
}
private void panel1_MouseUp(object sender, MouseEventArgs e)
{
leftDown = false;
}
private void panel1_MouseLeave(object sender, EventArgs e)
{
leftDown = false;
}
private void panel1_Paint(object sender, PaintEventArgs e)
{
e.Graphics.DrawImageUnscaled(drawing, 0, 0);
}
}