Behavior.OnMouseDoubleClick(Glyph, MouseButtons, Point) 方法

定义

命名空间:

System.Windows.Forms.Design.Behavior

程序集:

System.Windows.Forms.Design.dll

在任何双击消息进入 BehaviorService 的装饰器窗口时调用。

public:
 virtual bool OnMouseDoubleClick(System::Windows::Forms::Design::Behavior::Glyph ^ g, System::Windows::Forms::MouseButtons button, System::Drawing::Point mouseLoc);

public virtual bool OnMouseDoubleClick (System.Windows.Forms.Design.Behavior.Glyph? g, System.Windows.Forms.MouseButtons button, System.Drawing.Point mouseLoc);

abstract member OnMouseDoubleClick : System.Windows.Forms.Design.Behavior.Glyph * System.Windows.Forms.MouseButtons * System.Drawing.Point -> bool
override this.OnMouseDoubleClick : System.Windows.Forms.Design.Behavior.Glyph * System.Windows.Forms.MouseButtons * System.Drawing.Point -> bool

Public Overridable Function OnMouseDoubleClick (g As Glyph, button As MouseButtons, mouseLoc As Point) As Boolean

参数

g

Glyph

Glyph。

button

MouseButtons

一个 MouseButtons 值，指示单击了哪个按钮。

mouseLoc

Point

发生单击的位置。

返回

Boolean

如果消息已处理，则为 true；否则为 false。

示例

下面的代码示例演示如何处理双击消息。 有关完整的代码列表，请参阅 如何：扩展设计模式下控件的外观和行为。

// When you double-click on an AnchorGlyph, the value of 
// the control's Anchor property is toggled.
//
// Note that the value of the Anchor property is not set
// by direct assignment. Instead, the 
// PropertyDescriptor.SetValue method is used. This 
// enables notification of the design environment, so 
// related events can be raised, for example, the
// IComponentChangeService.ComponentChanged event.

public override bool OnMouseDoubleClick(
    Glyph g, 
    MouseButtons button, 
    Point mouseLoc)
{
    base.OnMouseDoubleClick(g, button, mouseLoc);

    if (button == MouseButtons.Left)
    {
        AnchorGlyph ag = g as AnchorGlyph;
        PropertyDescriptor pdAnchor = 
            TypeDescriptor.GetProperties(ag.relatedControl)["Anchor"];

        if (ag.IsEnabled)
        {
            // The glyph is enabled. 
            // Clear the AnchorStyle flag to disable the Glyph.
            pdAnchor.SetValue(
                ag.relatedControl, 
                ag.relatedControl.Anchor ^ ag.anchorStyle );
        }
        else
        {
            // The glyph is disabled. 
            // Set the AnchorStyle flag to enable the Glyph.
            pdAnchor.SetValue(
                ag.relatedControl,
                ag.relatedControl.Anchor | ag.anchorStyle);
        }
    }

    return true;
}

' When you double-click on an AnchorGlyph, the value of 
' the control's Anchor property is toggled.
'
' Note that the value of the Anchor property is not set
' by direct assignment. Instead, the 
' PropertyDescriptor.SetValue method is used. This 
' enables notification of the design environment, so 
' related events can be raised, for example, the
' IComponentChangeService.ComponentChanged event.
Public Overrides Function OnMouseDoubleClick( _
ByVal g As Glyph, _
ByVal button As MouseButtons, _
ByVal mouseLoc As Point) As Boolean

    MyBase.OnMouseDoubleClick(g, button, mouseLoc)

    If button = MouseButtons.Left Then
        Dim ag As AnchorGlyph = g

        Dim pdAnchor As PropertyDescriptor = _
        TypeDescriptor.GetProperties(ag.relatedControl)("Anchor")

        If ag.IsEnabled Then
            ' The glyph is enabled. 
            ' Clear the AnchorStyle flag to disable the Glyph.
            pdAnchor.SetValue(ag.relatedControl, _
            ag.relatedControl.Anchor Xor ag.anchorStyle)
        Else
            ' The glyph is disabled. 
            ' Set the AnchorStyle flag to enable the Glyph.
            pdAnchor.SetValue(ag.relatedControl, _
            ag.relatedControl.Anchor Or ag.anchorStyle)
        End If
    End If

    Return True

End Function

注解

OnMouseDoubleClick当任何双击消息进入 WndProc 的 装饰器窗口的 BehaviorService时，将调用 方法。 消息首先在此处传递到行为堆栈中的最 Behavior 顶层。 true从此方法返回表示消息已由 Behavior 处理，不应继续处理。 在此处，消息将发送到适当的行为。

另请参阅

• Glyph
• BehaviorService
• MenuCommand
• 如何：在设计模式下扩展控件的外观和行为