Behavior クラスとは何？わかりやすく解説 Weblio辞書

.NET Framework クラスライブラリリファレンス

索引トップ用語の索引ランキング

Behavior クラス

メモ : このクラスは、.NET Framework version 2.0 で新しく追加されたものです。

BehaviorService によって管理される Behavior オブジェクトを表します。

名前空間: System.Windows.Forms.Design.Behavior
アセンブリ: System.Design (system.design.dll 内)
構文

解説

このクラスを拡張すると、動作の選択、ドラッグ、サイズ変更を含め、任意の種類のユーザーインターフェイス動作を作成できます。

詳細については、「動作サービスの概要」を参照してください。

メモ
Behavior 型は Glyph 型と関連付ける必要があります。グリフに依存しない動作はサポートされません。

使用例

ユーザーのクリック操作に応答する Behavior クラスに基づいて独自のクラスを作成する方法を次のコード例に示します。このコード例は、BehaviorService クラスのトピックで取り上げているコード例の一部分です。

Visual Basic

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

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.
        }
    }
}