Behavior Classe

Definição

Namespace:

System.Windows.Forms.Design.Behavior

Assembly:

System.Windows.Forms.Design.dll

Origem:

Behavior.cs

Representa os objetos Behavior gerenciados por um BehaviorService.

public ref class Behavior abstract

public abstract class Behavior

type Behavior = class

Public MustInherit Class Behavior

Herança

Object

Behavior

Exemplos

O exemplo de código a seguir demonstra como criar sua própria classe com base na Behavior classe que responde a cliques do usuário. Este exemplo de código faz parte de um exemplo maior fornecido para a BehaviorService classe .

// By providing our own behavior we can do something
// interesting when the user clicks or manipulates our glyph.
public  ref class DemoBehavior : public Behavior
{
public:
    bool OnMouseUp(Glyph^ g, MouseButtons^ button)
    {
        MessageBox::Show("Hey, you clicked the mouse here");

        // indicating we processed this event.
        return true;
    }
};

public ref class DemoGlyph : public Glyph
{
    Control^ control;
    BehaviorService^ behavior;

public:
    DemoGlyph(BehaviorService^ behavior, Control^ control):
      Glyph(gcnew BehaviorServiceSample::DemoBehavior)
      {
          this->behavior = behavior;
          this->control = control;
      }

public:
    virtual property Rectangle Bounds
    {
        Rectangle get() override
        {
            // Create a glyph that is 10x10 and sitting
            // in the middle of the control.  Glyph coordinates
            // are in adorner window coordinates, so we must map
            // using the behavior service.
            Point edge = behavior->ControlToAdornerWindow(control);
            Size size = control->Size;
            Point center = Point(edge.X + (size.Width / 2),
                edge.Y + (size.Height / 2));

            Rectangle bounds = Rectangle(center.X - 5,
                center.Y - 5, 10, 10);

            return bounds;
        }
    }

public:
    virtual Cursor^ GetHitTest(Point p) override
    {
        // GetHitTest is called to see if the point is
        // within this glyph.  This gives us a chance to decide
        // what cursor to show.  Returning null from here means
        // the mouse pointer is not currently inside of the
        // glyph.  Returning a valid cursor here indicates the
        // pointer is inside the glyph, and also enables our
        // Behavior property as the active behavior.
        if (Bounds.Contains(p))
        {
            return Cursors::Hand;
        }
        return nullptr;
    }

public:
    virtual void Paint(PaintEventArgs^ pe) override
    {
        // Draw our glyph.  Our's is simple:  a blue ellipse.
        pe->Graphics->FillEllipse(Brushes::Blue, Bounds);
    }
};

class MyGlyph : Glyph
{
    Control control;
    BehaviorService behaviorSvc;

    public MyGlyph(BehaviorService behaviorSvc, Control control) : 
        base(new MyBehavior())
    {
        this.behaviorSvc = behaviorSvc;
        this.control = control;
    }

    public override Rectangle Bounds
    {
        get
        {
            // Create a glyph that is 10x10 and sitting
            // in the middle of the control.  Glyph coordinates
            // are in adorner window coordinates, so we must map
            // using the behavior service.
            Point edge = behaviorSvc.ControlToAdornerWindow(control);
            Size size = control.Size;
            Point center = new Point(edge.X + (size.Width / 2), 
                edge.Y + (size.Height / 2));

            Rectangle bounds = new Rectangle(
                center.X - 5,
                center.Y - 5,
                10,
                10);

            return bounds;
        }
    }

    public override Cursor GetHitTest(Point p)
    {
        // GetHitTest is called to see if the point is
        // within this glyph.  This gives us a chance to decide
        // what cursor to show.  Returning null from here means
        // the mouse pointer is not currently inside of the glyph.
        // Returning a valid cursor here indicates the pointer is
        // inside the glyph, and also enables our Behavior property
        // as the active behavior.
        if (Bounds.Contains(p))
        {
            return Cursors.Hand;
        }

        return null;
    }

    public override void Paint(PaintEventArgs pe)
    {
        // Draw our glyph. It is simply a blue ellipse.
        pe.Graphics.FillEllipse(Brushes.Blue, Bounds);
    }

    // By providing our own behavior we can do something interesting
    // when the user clicks or manipulates our glyph.
    class MyBehavior : Behavior
    {
        public override bool OnMouseUp(Glyph g, MouseButtons button)
        {
            MessageBox.Show("Hey, you clicked the mouse here");
            return true; // indicating we processed this event.
        }
    }
}

Class MyGlyph
    Inherits Glyph
    Private control As Control
    Private behaviorSvc As _
        System.Windows.Forms.Design.Behavior.BehaviorService

    Public Sub New(ByVal behaviorSvc As _
        System.Windows.Forms.Design.Behavior.BehaviorService, _
        ByVal control As Control)

        MyBase.New(New MyBehavior())
        Me.behaviorSvc = behaviorSvc
        Me.control = control
    End Sub

    Public Overrides ReadOnly Property Bounds() As Rectangle
        Get
            ' Create a glyph that is 10x10 and sitting
            ' in the middle of the control.  Glyph coordinates
            ' are in adorner window coordinates, so we must map
            ' using the behavior service.
            Dim edge As Point = behaviorSvc.ControlToAdornerWindow(control)
            Dim size As Size = control.Size
            Dim center As New Point(edge.X + size.Width / 2, edge.Y + _
                size.Height / 2)

            Dim bounds1 As New Rectangle(center.X - 5, center.Y - 5, 10, 10)

            Return bounds1
        End Get
    End Property

    Public Overrides Function GetHitTest(ByVal p As Point) As Cursor
        ' GetHitTest is called to see if the point is
        ' within this glyph.  This gives us a chance to decide
        ' what cursor to show.  Returning null from here means
        ' the mouse pointer is not currently inside of the glyph.
        ' Returning a valid cursor here indicates the pointer is
        ' inside the glyph,and also enables our Behavior property
        ' as the active behavior.
        If Bounds.Contains(p) Then
            Return Cursors.Hand
        End If

        Return Nothing

    End Function


    Public Overrides Sub Paint(ByVal pe As PaintEventArgs)
        ' Draw our glyph.  It is simply a blue ellipse.
        pe.Graphics.FillEllipse(Brushes.Blue, Bounds)

    End Sub

    ' By providing our own behavior we can do something interesting
    ' when the user clicks or manipulates our glyph.

    Class MyBehavior
        Inherits System.Windows.Forms.Design.Behavior.Behavior

        Public Overrides Function OnMouseUp(ByVal g As Glyph, _
            ByVal button As MouseButtons) As Boolean
            MessageBox.Show("Hey, you clicked the mouse here")
            Return True
            ' indicating we processed this event.
        End Function 'OnMouseUp
    End Class

End Class

Comentários

Essa classe pode ser estendida para desenvolver qualquer tipo de comportamento de interface do usuário, incluindo comportamentos de seleção, arrastar e redimensionar.

Para obter mais informações, consulte Visão geral do serviço de comportamento.

Observação

Seu Behavior tipo deve estar associado a um Glyph tipo. Não há suporte para comportamentos independentes de glifo.

Construtores

Behavior()	Inicializa uma nova instância da classe Behavior.
Behavior(Boolean, BehaviorService)	Inicializa uma nova instância da classe Behavior com o BehaviorService determinado.

Propriedades

Cursor	Obtém o cursor que deve ser exibido para este comportamento.
DisableAllCommands	Obtém um valor que indica se os objetos MenuCommand devem ser desabilitados.

Métodos

Equals(Object)	Determina se o objeto especificado é igual ao objeto atual. (Herdado de Object)
FindCommand(CommandID)	Intercepta comandos.
GetHashCode()	Serve como a função de hash padrão. (Herdado de Object)
GetType()	Obtém o Type da instância atual. (Herdado de Object)
MemberwiseClone()	Cria uma cópia superficial do Object atual. (Herdado de Object)
OnDragDrop(Glyph, DragEventArgs)	Permite um comportamento do tipo "arrastar e soltar" personalizado.
OnDragEnter(Glyph, DragEventArgs)	Permite um comportamento do tipo "drag-enter" personalizado.
OnDragLeave(Glyph, EventArgs)	Permite um comportamento do tipo "drag-leave" personalizado.
OnDragOver(Glyph, DragEventArgs)	Permite um comportamento do tipo "drag-over" personalizado.
OnGiveFeedback(Glyph, GiveFeedbackEventArgs)	Permite um comportamento de comentários do tipo "arrastar e soltar" personalizado.
OnLoseCapture(Glyph, EventArgs)	Chamado pela janela de adorno quando ela perde a captura do mouse.
OnMouseDoubleClick(Glyph, MouseButtons, Point)	Chamado quando qualquer mensagem de clique duplo entra na janela de adorno do BehaviorService.
OnMouseDown(Glyph, MouseButtons, Point)	Chamado quando qualquer mensagem de mouse para baixo entra na janela de adorno do BehaviorService.
OnMouseEnter(Glyph)	Chamado quando qualquer mensagem de entrada do mouse entra na janela de adorno do BehaviorService.
OnMouseHover(Glyph, Point)	Chamado quando qualquer mensagem de passagem do mouse entra na janela de adorno do BehaviorService.
OnMouseLeave(Glyph)	Chamado quando qualquer mensagem de saída do mouse entra na janela de adorno do BehaviorService.
OnMouseMove(Glyph, MouseButtons, Point)	Chamado quando qualquer mensagem de movimentação do mouse entra na janela de adorno do BehaviorService.
OnMouseUp(Glyph, MouseButtons)	Chamado quando qualquer mensagem de mouse para cima entra na janela de adorno do BehaviorService.
OnQueryContinueDrag(Glyph, QueryContinueDragEventArgs)	Envia este evento do tipo "arrastar e soltar" da janela de adorno para o Behavior apropriado ou Glyph com teste de clique.
ToString()	Retorna uma cadeia de caracteres que representa o objeto atual. (Herdado de Object)

Confira também

• Glyph
• BehaviorService
• MenuCommand
• Como estender a aparência e o comportamento dos controles no modo de design
• Visão geral do serviço de comportamento