c#如何像win7一样框选桌面图标实现鼠标框选
c#如何像win7框选桌面图标一样，实现对控件的框选，框选的区域是一个有背景色而透明的距形,控件要透过这个距形，知道的朋友请贴上代码，谢谢啦. --------------------编程问答-------------------- 两种方式:1)
private void HandleZoomDragEx(Graphics g)
{
if (Math.Abs(_dragStartPt.X - _dragEndPt.X) < 4 &&
Math.Abs(_dragEndPt.Y - _dragStartPt.Y) < 4)
{
return;
}
using (Pen pen = new Pen(Color.Black, 1))
{
pen.DashStyle = System.Drawing.Drawing2D.DashStyle.Dash;
pen.DashPattern = new float[2] { 3, 3 };
pen.DashOffset = 3;
int w, h;
w = Math.Abs(_dragStartPt.X - _dragEndPt.X);
h = Math.Abs(_dragStartPt.Y - _dragEndPt.Y);
Point? ptStart = null;
if (_dragStartPt.X < _dragEndPt.X && _dragStartPt.Y < _dragEndPt.Y)
{
ptStart = _dragStartPt;
}
else if (_dragStartPt.X > _dragEndPt.X && _dragStartPt.Y > _dragEndPt.Y)
{
ptStart = _dragEndPt;
}
else if (_dragStartPt.X > _dragEndPt.X && _dragStartPt.Y < _dragEndPt.Y)
{
ptStart = new Point(_dragEndPt.X, _dragStartPt.Y);
}
else
{
ptStart = new Point(_dragStartPt.X, _dragEndPt.Y);
}
g.DrawRectangle(pen, new Rectangle(ptStart.Value, new Size(w, h)));
}
}
2)
ControlPaint.DrawReversibleFrame(rect, BackColor, FrameStyle.Dashed); --------------------编程问答--------------------
怎么用呢
补充：.NET技术 , C#
