（改進）UserControl的單擊事件對滑鼠左右鍵都有效，怎樣使之像按鈕控制項那樣只對滑鼠左鍵敏感？

UserControl的單擊事件對滑鼠左右鍵都有效，怎樣使之像按鈕控制項那樣只對滑鼠左鍵敏感？（改進）

在類的外面聲明這個委託：

public delegate void MouseClickEvent(object sender, MouseEventArgs e);

在類裡面重寫一些方法：

/// <summary>

/// 標記滑鼠是否經曆了按下移動抬起的過程。

/// </summary>

private bool _isMouseLeftButtonDownMoveUp = false;

protected override void OnMouseDown(MouseEventArgs e)

{

this._isMouseLeftButtonDownMoveUp = false;

base.OnMouseDown (e);

}

protected override void OnMouseMove(MouseEventArgs e)

{

if(e.Button == MouseButtons.Left)

{

this._isMouseLeftButtonDownMoveUp = true;

}

base.OnMouseMove (e);

}

protected override void OnMouseUp(MouseEventArgs e)

{

base.OnMouseUp (e);

if(!(this.AllowDragMove & this._isMouseLeftButtonDownMoveUp))

{

//如果被單擊，而且位置還在控制項範圍之內，而且單擊的是左鍵

if(e.Clicks == 1 & this.InShell(e.X, e.Y) & e.Button == MouseButtons.Left)

{

//觸發MouseClick事件

this.MouseClick(this, e);

}

}

this._isMouseLeftButtonDownMoveUp = false;

}

private bool InBounds(int x, int y)

{

Point p = this.PointToScreen(new Point(x, y));

Point p1 = this.PointToScreen(new Point(0, 0));

Point p2 = this.PointToScreen(new Point(this.Width, this.Height));

if(p.X < p1.X)

{

return false;

}

if(p.X > p2.X)

{

return false;

}

if(p.Y < p1.Y)

{

return false;

}

if(p.Y > p2.Y)

{

return false;

}

return true;

}

public event MouseClickEvent MouseClick;

private void Shell_MouseClick(object sender, MouseEventArgs e)

{

//做一些需要的事情

}