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Behavior.OnMouseDoubleClick(Glyph, MouseButtons, Point) Método

  • Referência

Definição

Namespace:
System.Windows.Forms.Design.Behavior
Assembly:
System.Design.dll
Assembly:
System.Windows.Forms.Design.dll
Origem:
Behavior.cs
Origem:
Behavior.cs
Origem:
Behavior.cs

Chamado quando qualquer mensagem de clique duplo entra na janela de adorno do BehaviorService.

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);
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

Parâmetros

g
Glyph

Um Glyph.

button
MouseButtons

Um valor MouseButtons que indica qual botão foi clicado.

mouseLoc
Point

O local no qual o clique ocorreu.

Retornos

Boolean

true se a mensagem foi manipulada; caso contrário, false.

Exemplos

O exemplo de código a seguir demonstra como lidar com uma mensagem de clique duplo. Para obter uma listagem de código completa, consulte Como estender a aparência e o comportamento dos controles no modo de design.

// 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

Comentários

O OnMouseDoubleClick método é chamado quando qualquer mensagem de clique duplo entra no WndProc da janela do adorno do BehaviorService. A mensagem é passada pela primeira vez aqui, para o mais Behavior alto na pilha de comportamento. true Retornar desse método significa que a mensagem foi tratada pelo Behavior e não deve continuar a ser processada. A partir daqui, a mensagem é enviada para o comportamento apropriado.

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