思路是这样的.得有三个变量.
记录x坐标: int xPos;
记录y坐标: int yPos;
记录是否按下鼠标: bool MoveFlag;
| 代码如下 |
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//在picturebox的鼠标按下事件里,记录三个变量.
private void picBox_MouseDown(object sender, MouseEventArgs e)
{
MoveFlag = true;//已经按下.
xPos = e.X;//当前x坐标.
yPos = e.Y;//当前y坐标.
}
//在picturebox的鼠标按下事件里.
private void picBox_MouseUp(object sender, MouseEventArgs e)
{
MoveFlag = false;
}
//在picturebox鼠标移动
private void picBox_MouseMove(object sender, MouseEventArgs e)
{
if (MoveFlag)
{
picBox.Left += Convert.ToInt16(e.X - xPos);//设置x坐标.
picBox.Top += Convert.ToInt16(e.Y - yPos);//设置y坐标.
}
}
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这样就可以实现控件在容器里的移动
在pictureBox中拖动图片的实现代码 bool wselected = false;
| 代码如下 |
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Point p = new Point();
private void pictureBox1_MouseDown(object sender, MouseEventArgs e)
{
pictureBox1.Cursor = Cursors.Hand; //按下鼠标时，将鼠标形状改为手型
wselected = true;
p.X = e.X;
p.Y = e.Y;
}
int driftX = 0, driftY = 0;
int mx = 0, my = 0;
private void pictureBox1_MouseMove(object sender, MouseEventArgs e)
{
if (wselected)
{
driftX = p.X - e.X;
driftY = p.Y - e.Y;
mx = mx - driftX;
my = my - driftY;
Bitmap bm = new Bitmap(this.pictureBox1.Image);
Graphics g = pictureBox1.CreateGraphics();
g.Clear(pictureBox1.BackColor);
g.DrawImage(bm, mx, my);
p.X = e.X;
p.Y = e.Y;
bm.Dispose();
g.Dispose();
}
}
private void pictureBox1_MouseUp(object sender, MouseEventArgs e)
{
pictureBox1.Cursor = Cursors.Default; //松开鼠标时，形状恢复为箭头
wselected = false;
}
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