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【CSharp】拖拽控件

作者:喜爱糖葫芦 / 发布于2015/5/19/ 561

拖拽winform控件分为三步
mouse_down
mouse_move
mouse_up


	private void pictureBox_MouseDown(object sender, MouseEventArgs e)
	 {
	 oldLocation = new Point(e.X, e.Y);
	 currentPictureBox = GetPictureBoxByHashCode(sender.GetHashCode().ToString());
	 MoseDown(currentPictureBox, sender, e);
	 }
	
	 public void MoseDown(PictureBox pic, object sender, MouseEventArgs e)
	 {
	 if (e.Button == MouseButtons.Left)
	 {
	 oldLocation = e.Location;
	 rect = pic.Bounds;
	 }
	 }

	

	private void pictureBox_MouseMove(object sender, MouseEventArgs e)
	 {
	 if (e.Button == MouseButtons.Left)
	 {
	 isDrag = true;
	 rect.Location = getPointToForm(new Point(e.Location.X - oldLocation.X, e.Location.Y - oldLocation.Y));
	 this.Refresh();
	
	 }
	 }

	

	private void pictureBox_MouseUp(object sender, MouseEventArgs e)
	 {
	 oldLocation = new Point(currentPictureBox.Location.X, currentPictureBox.Location.Y);
	 if (oldLocation.X + e.X > 300 || oldLocation.Y + e.Y > 300||oldLocation.X + e.X < 0 || oldLocation.Y + e.Y < 0)
	 {
	 return;
	 }
	 haveToPictureBox = GetPictureBoxByLocation(oldLocation.X + e.X, oldLocation.Y + e.Y);
	 newLocation = new Point(haveToPictureBox.Location.X, haveToPictureBox.Location.Y);
	 haveToPictureBox.Location = oldLocation;
	 PictureMouseUp(currentPictureBox, sender, e);
	 if ( Judge())
	 {
	 lab_result.Text = "成功！";
	 //MessageBox.Show("恭喜拼图成功");
	 }
	 }
	
	 public void PictureMouseUp(PictureBox pic, object sender, MouseEventArgs e)
	 {
	 if (e.Button == MouseButtons.Left)
	 {
	 if (isDrag)
	 {
	 isDrag = false;
	 pic.Location = newLocation;
	 this.Refresh();
	 }
	 reset();
	 }
	 }

	private void reset()
	 {
	 mouseDownPoint = Point.Empty;
	 rect = Rectangle.Empty;
	 isDrag = false;
	 }

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