MonthCalendar(日历控件)扩展DoubleClick事件

MonthCalendar(日历控件)扩展DoubleClick事件 - tom385

tom385 2021-08-09 原文

MonthCalendar(日历控件)扩展DoubleClick事件

C#初学并不是很难，学过C，学过JAVA就能很容易入门，但仅仅是入门而已！真正的较量是在开发过程中碰到的一些实际的问题，昨天在开发一个和日历控件（MonthCalendar）有关联的项目，本想使用DoubleClick事件使得控件关闭然后传值，就这么简单！可是发现微软既然没有提供MonthCalendar中DoubleClick事件，原因不知为何，但问题必须解决，没办法，只能亲手扩展了！
下面就与大家一起分享解决方法！其中参考国外网的一些代码！
首先需要新建一个自定义控件继承MonthCalendar

代码区域

public partial class Cldar : MonthCalendar

{

private Point m_LastClickPosition;

private long m_LastClickTime;

private Boolean m_LastClickRaisedDoubleClick;

public Cldar()

{

InitializeComponent();

}

protected override void OnPaint(PaintEventArgs pe)

{

// TODO: Add custom paint code here

// Calling the base class OnPaint

base.OnPaint(pe);

}

/**//// <summary>

/// ModeChanged Event.

/// </summary>

[Browsable(true)]

[Category(“Basic_Event“), Description(“觸發MonthCalendar雙擊時的事件.“)]

public event EventHandler DoubleClick;

protected override void OnDoubleClick(EventArgs e)

{

DoubleClick(this, e);

base.OnDoubleClick(e);

}

bool IsInDoubleClickArea(Point Point1, Point Point2)

{

return Math.Abs(Point1.X – Point2.X) <= SystemInformation.DoubleClickSize.Width &&

Math.Abs(Point1.Y – Point2.Y) <= SystemInformation.DoubleClickSize.Height;

}

protected override void OnMouseDown(MouseEventArgs e)

{

if (e.Button == MouseButtons.Left)

{

if (!m_LastClickRaisedDoubleClick && System.DateTime.Now.Ticks – m_LastClickTime <= SystemInformation.DoubleClickTime * 10000 && IsInDoubleClickArea(m_LastClickPosition, Cursor.Position))

{

OnDoubleClick(EventArgs.Empty);

m_LastClickRaisedDoubleClick = true;

}

else

{

m_LastClickRaisedDoubleClick = false;

}

m_LastClickPosition = Cursor.Position;

m_LastClickTime = System.DateTime.Now.Ticks;

}

base.OnMouseDown(e);