ControlDesigner Classe

Définition

public ref class ControlDesigner : System::ComponentModel::Design::ComponentDesigner

public class ControlDesigner : System.ComponentModel.Design.ComponentDesigner

type ControlDesigner = class
    inherit ComponentDesigner

Public Class ControlDesigner
Inherits ComponentDesigner

Héritage

Object

ComponentDesigner

ControlDesigner

Dérivé

System.Windows.Forms.Design.ParentControlDesigner

Exemples

L’exemple ControlDesigner d’implémentation suivant illustre la gestion et MouseEnterMouseLeave les événements, en s’appuyant sur un contrôle à partir du code du concepteur et en utilisant une partie de l’interface IDesignerFilter pour ajouter une propriété pour le contrôle au moment de la conception. L’exemple de code suivant contient un concepteur et un exemple de contrôle utilisateur associé au concepteur. Pour générer cet exemple, compilez l’exemple dans une bibliothèque de classes, ajoutez une référence à la bibliothèque à un projet Windows Forms, ajoutez le contrôle à la boîte à outils et ajoutez une instance du contrôle à votre formulaire. Lorsque vous pointez vers le contrôle, le contour interne du périmètre du contrôle est mis en surbrillance et la couleur utilisée pour dessiner le contour correspond à la OutlineColor propriété que le concepteur a ajoutée aux propriétés répertoriées pour le contrôle.

Ajoutez une référence à l’assembly System.Design pour compiler l’exemple de code.

using namespace System;
using namespace System::ComponentModel;
using namespace System::ComponentModel::Design;
using namespace System::Collections;
using namespace System::Drawing;
using namespace System::Windows::Forms;
using namespace System::Windows::Forms::Design;
using namespace System::Security::Permissions;

   public ref class TestControlDesigner: public System::Windows::Forms::Design::ControlDesigner
   {
   private:
      bool mouseover;
      Color lineColor;

   public:

      property Color OutlineColor 
      {
         Color get()
         {
            return lineColor;
         }

         void set( Color value )
         {
            lineColor = value;
         }

      }
      TestControlDesigner()
      {
         mouseover = false;
         lineColor = Color::White;
      }

   protected:
      virtual void OnMouseEnter() override
      {
         this->mouseover = true;
         this->Control->Refresh();
      }

      virtual void OnMouseLeave() override
      {
         this->mouseover = false;
         this->Control->Refresh();
      }

      virtual void OnPaintAdornments( System::Windows::Forms::PaintEventArgs^ pe ) override
      {
         if ( this->mouseover )
                  pe->Graphics->DrawRectangle( gcnew Pen( gcnew SolidBrush( this->lineColor ),6 ), 0, 0, this->Control->Size.Width, this->Control->Size.Height );
      }

   protected:
      [ReflectionPermission(SecurityAction::Demand, Flags=ReflectionPermissionFlag::MemberAccess)]
      virtual void PreFilterProperties( System::Collections::IDictionary^ properties ) override
      {
         properties->Add( "OutlineColor", TypeDescriptor::CreateProperty( TestControlDesigner::typeid, "OutlineColor", System::Drawing::Color::typeid, nullptr ) );
      }
   };

   [DesignerAttribute(TestControlDesigner::typeid)]
   public ref class TestControl: public System::Windows::Forms::UserControl
   {
   private:
      System::ComponentModel::Container^ components;

   public:
      TestControl()
      {
         components = gcnew System::ComponentModel::Container;
      }

   protected:
      ~TestControl()
      {
         if ( components != nullptr )
         {
            delete components;
         }
      }
   };

using System;
using System.ComponentModel;
using System.ComponentModel.Design;
using System.Collections;
using System.Drawing;
using System.Windows.Forms;
using System.Windows.Forms.Design;

namespace ControlDesignerExample
{
    // ExampleControlDesigner is an example control designer that 
    // demonstrates basic functions of a ControlDesigner. 
    public class ExampleControlDesigner  : System.Windows.Forms.Design.ControlDesigner
    {
        // This Boolean state reflects whether the mouse is over the control.
        private bool mouseover = false;
        // This color is a private field for the OutlineColor property.
        private Color lineColor = Color.White;

        // This color is used to outline the control when the mouse is 
        // over the control.
        public Color OutlineColor
        {
            get
            {
                return lineColor;
            }
            set
            {
                lineColor = value;
            }
        }

        public ExampleControlDesigner()
        {
        }

        // Sets a value and refreshes the control's display when the 
        // mouse position enters the area of the control.
        protected override void OnMouseEnter()
        {
            this.mouseover = true;
            this.Control.Refresh();
        }    

        // Sets a value and refreshes the control's display when the 
        // mouse position enters the area of the control.        
        protected override void OnMouseLeave()
        {
            this.mouseover = false;            
            this.Control.Refresh();
        }        
        
        // Draws an outline around the control when the mouse is 
        // over the control.    
        protected override void OnPaintAdornments(System.Windows.Forms.PaintEventArgs pe)
        {
            if (this.mouseover)
            {
                pe.Graphics.DrawRectangle(
                    new Pen(new SolidBrush(this.lineColor), 6), 
                    0, 
                    0, 
                    this.Control.Size.Width, 
                    this.Control.Size.Height);
            }
        }

        // Adds a property to this designer's control at design time 
        // that indicates the outline color to use. 
        // The DesignOnlyAttribute ensures that the OutlineColor
        // property is not serialized by the designer.
        protected override void PreFilterProperties(System.Collections.IDictionary properties)
        {
            PropertyDescriptor pd = TypeDescriptor.CreateProperty(
                typeof(ExampleControlDesigner), 
                "OutlineColor",
                typeof(System.Drawing.Color),
                new Attribute[] { new DesignOnlyAttribute(true) });

            properties.Add("OutlineColor", pd);
        }
    }

    // This example control demonstrates the ExampleControlDesigner.
    [DesignerAttribute(typeof(ExampleControlDesigner))]
    public class ExampleControl : System.Windows.Forms.UserControl
    {        
        private System.ComponentModel.Container components = null;

        public ExampleControl()
        {
            components = new System.ComponentModel.Container();
        }

        protected override void Dispose( bool disposing )
        {
            if( disposing )
            {
                if( components != null )
                components.Dispose();
            }
            base.Dispose( disposing );
        }
    }
}

Imports System.ComponentModel
Imports System.ComponentModel.Design
Imports System.Collections
Imports System.Drawing
Imports System.Windows.Forms
Imports System.Windows.Forms.Design

Namespace ControlDesignerExample
    _
    ' ExampleControlDesigner is an example control designer that 
    ' demonstrates basic functions of a ControlDesigner.
    <System.Security.Permissions.PermissionSetAttribute(System.Security.Permissions.SecurityAction.Demand, Name:="FullTrust")> _
    Public Class ExampleControlDesigner
        Inherits System.Windows.Forms.Design.ControlDesigner

        ' This boolean state reflects whether the mouse is over the control.
        Private mouseover As Boolean = False
        ' This color is a private field for the OutlineColor property.
        Private lineColor As Color = Color.White

        ' This color is used to outline the control when the mouse is 
        ' over the control.
        Public Property OutlineColor() As Color
            Get
                Return lineColor
            End Get
            Set(ByVal Value As Color)
                lineColor = Value
            End Set
        End Property

        Public Sub New()
        End Sub

        ' Sets a value and refreshes the control's display when the 
        ' mouse position enters the area of the control.
        Protected Overrides Sub OnMouseEnter()
            Me.mouseover = True
            Me.Control.Refresh()
        End Sub

        ' Sets a value and refreshes the control's display when the 
        ' mouse position enters the area of the control.		
        Protected Overrides Sub OnMouseLeave()
            Me.mouseover = False
            Me.Control.Refresh()
        End Sub

        ' Draws an outline around the control when the mouse is 
        ' over the control.	
        Protected Overrides Sub OnPaintAdornments(ByVal pe As System.Windows.Forms.PaintEventArgs)
            If Me.mouseover Then
                pe.Graphics.DrawRectangle(New Pen(New SolidBrush(Me.lineColor), 6), 0, 0, Me.Control.Size.Width, Me.Control.Size.Height)
            End If
        End Sub

        ' Adds a property to this designer's control at design time 
        ' that indicates the outline color to use.
        ' The DesignOnlyAttribute ensures that the OutlineColor
        ' property is not serialized by the designer.
        Protected Overrides Sub PreFilterProperties(ByVal properties As System.Collections.IDictionary)
            Dim pd As PropertyDescriptor = TypeDescriptor.CreateProperty( _
            GetType(ExampleControlDesigner), _
            "OutlineColor", _
            GetType(System.Drawing.Color), _
            New Attribute() {New DesignOnlyAttribute(True)})

            properties.Add("OutlineColor", pd)
        End Sub
    End Class

    ' This example control demonstrates the ExampleControlDesigner.
    <DesignerAttribute(GetType(ExampleControlDesigner))> _
     Public Class ExampleControl
        Inherits System.Windows.Forms.UserControl
        Private components As System.ComponentModel.Container = Nothing

        Public Sub New()
            components = New System.ComponentModel.Container()
        End Sub

        Protected Overloads Sub Dispose(ByVal disposing As Boolean)
            If disposing Then
                If (components IsNot Nothing) Then
                    components.Dispose()
                End If
            End If
            MyBase.Dispose(disposing)
        End Sub
    End Class

End Namespace

Remarques

ControlDesigner fournit une classe de base pour les concepteurs de composants qui dérivent de Control. En plus des méthodes et fonctionnalités héritées de la ComponentDesigner classe, ControlDesigner fournit des méthodes supplémentaires pour prendre en charge l’extension et la modification du comportement d’un associé Control au moment du design.

Vous pouvez associer un concepteur à un type à l’aide d’un DesignerAttribute. Pour obtenir une vue d’ensemble de la personnalisation du comportement du temps de conception, consultez Extension de la prise en charge Design-Time.

Constructeurs

Champs

Propriétés

Méthodes

Implémentations d’interfaces explicites

S’applique à

Voir aussi

• ComponentDesigner
• IDesigner
• DesignerAttribute
• Extension de la prise en charge au moment du design