ITypeDescriptorFilterService-Schnittstelle

Stellt eine Schnittstelle bereit, mit der der Satz der Memberdeskriptoren für eine Komponente im Entwurfsmodus bearbeitet werden kann.

Namespace: System.ComponentModel.Design
Assembly: System (in system.dll)

Syntax

'Declaration
Public Interface ITypeDescriptorFilterService
'Usage
Dim instance As ITypeDescriptorFilterService

public interface ITypeDescriptorFilterService

public interface class ITypeDescriptorFilterService

public interface ITypeDescriptorFilterService

public interface ITypeDescriptorFilterService

Hinweise

Mit der ITypeDescriptorFilterService-Schnittstelle können Sie Eigenschaften, Ereignisse und Attribute auf Klassenebene einer Komponente zur Entwurfszeit ändern. Diese Änderung wird durch den Deskriptorensatz vollzogen, den eine Komponente durch einen TypeDescriptor bereitstellt. Der Typdeskriptor fragt den ITypeDescriptorFilterService-Dienst in der Site einer Komponente ab und übergibt diesem Dienst, sofern vorhanden, alle aufgelisteten Metadaten. Der Dienst kann dann die Metadaten durch Hinzufügen, Entfernen und Verändern der vorhandenen Eigenschaften der Komponente ändern.

Zum Beispiel können die Eigenschaften einer Komponente durch einen Aufruf der FilterProperties-Methode geändert werden. Der Filterdienst ruft ein Wörterbuch ab, das Eigenschaftennamen und die jeweiligen Eigenschaftendeskriptoren vom Typ PropertyDescriptor enthält. Die Änderungen werden mithilfe der folgenden Logik implementiert.

Änderung	Implementierung
Entfernen	Löschen Sie den entsprechenden Eintrag im Wörterbuch.
Hinzufügen	Fügen Sie dem Wörterbuch den entsprechenden Eintrag hinzu.
Ändern	Rufen Sie vorhandene Eigenschaftendeskriptormethoden auf, ersetzen Sie den zugeordneten Eigenschaftendeskriptoreintrag oder ersetzen Sie das gesamte Schlüssel-Wert-Paar der Eigenschaft im Wörterbuch.

Der Rückgabewert von FilterProperties bestimmt, ob dieser Eigenschaftensatz fixiert wird. Wenn diese Methode true zurückgibt, kann der TypeDescriptor für diese Komponente die Ergebnisse zwischenspeichern. Dieser Cache wird solange beibehalten, bis entweder die Garbage Collection für die Komponente durchgeführt oder die Refresh-Methode des Typdeskriptors aufgerufen wird.

Hinweise für Implementierer Um die Memberdeskriptoren zu filtern, die von einem TypeDescriptor verfügbar gemacht werden, implementieren Sie diese Schnittstelle auf einer Komponente und überschreiben die Methode FilterAttributes, FilterEvents oder FilterProperties dieser Klasse, um die Attribute, Ereignisse bzw. Eigenschaften zu filtern.

Beispiel

Das folgende Codebeispiel veranschaulicht einen Designer, der die Attributauflistung eines neuen oder vorhandenen Button mit dem ITypeDescriptorFilterService filtert, um ein Designerattribut für einen neuen Designer hinzuzufügen, bevor der Designer für die Schaltfläche geladen bzw. erneut geladen wird.

Um das Beispiel zu verwenden, fügen Sie einem Windows Forms-Projekt den Code hinzu, und laden Sie die Komponenten aus der Klassenbibliothek in die Toolbox.

Exemplarische Vorgehensweise: Automatisches Füllen der Toolbox mit benutzerdefinierten Komponenten
Exemplarische Vorgehensweise: Automatisches Füllen der Toolbox mit benutzerdefinierten Komponenten
Exemplarische Vorgehensweise: Automatisches Füllen der Toolbox mit benutzerdefinierten Komponenten
Exemplarische Vorgehensweise: Automatisches Füllen der Toolbox mit benutzerdefinierten Komponenten

Fügen Sie dem Formular einige Schaltflächen hinzu. Fügen Sie dem Formular eine ButtonDesignerFilterComponent hinzu. Diese wird daraufhin im Komponentenfach angezeigt. Die ButtonDesignerFilterComponent fügt einen ButtonDesignerFilterService als Entwurfsmodus-Dienstanbieter hinzu, der einen ITypeDescriptorFilterService implementiert. Der ButtonDesignerFilterService ersetzt die Designer aller vorhandenen und neuen Schaltflächen durch einen ColorCycleButtonDesigner, woraufhin die vorhandenen oder neuen Button-Objekte im Formular mit dem Farbwechsel beginnen. Die Farbe der Schaltflächen wechselt, wenn Sie mit dem Mauszeiger darauf zeigen. Bei MouseLeave-Ereignissen wird entweder der Farbwechsel fortgesetzt, oder die Hinter- und Vordergrundfarbe werden wiederhergestellt. Neue Button-Objekte erhalten den ColorCycleButtonDesigner über die FilterAttributes-Methode des geladenen ButtonDesignerFilterService, bis die ButtonDesignerFilterComponent freigegeben wird und den ursprünglichen ITypeDescriptorFilterService ersetzt. Die ColorCycleButton-Klasse in diesem Beispiel ist ein Button, der einem ColorCycleButtonDesigner zugeordnet ist.

Imports System
Imports System.Collections
Imports System.ComponentModel
Imports System.ComponentModel.Design
Imports System.ComponentModel.Design.Serialization
Imports System.Drawing
Imports System.Reflection
Imports System.Timers
Imports System.Windows.Forms
Imports System.Windows.Forms.Design

Namespace ITypeDescriptorFilterSample

    ' Component to host the ButtonDesignerFilterComponentDesigner that loads the 
    ' ButtonDesignerFilterService ITypeDescriptorFilterService.
    <Designer(GetType(ButtonDesignerFilterComponentDesigner))> _
    Public Class ButtonDesignerFilterComponent
        Inherits System.ComponentModel.Component

        Public Sub New(ByVal container As System.ComponentModel.IContainer)
            container.Add(Me)
        End Sub 'New

        Public Sub New()
        End Sub 'New
    End Class 'ButtonDesignerFilterComponent

    ' Provides a designer that can add a ColorCycleButtonDesigner to each 
    ' button in a design time project using the ButtonDesignerFilterService 
    ' ITypeDescriptorFilterService.
    Public Class ButtonDesignerFilterComponentDesigner
        Inherits System.ComponentModel.Design.ComponentDesigner

        ' Indicates whether the service has been loaded.
        Private serviceloaded As Boolean = False
        ' Stores any old ITypeDescriptorFilterService to restore later.
        Private oldservice As ITypeDescriptorFilterService = Nothing

        Public Sub New()
        End Sub

        ' Loads the new ITypeDescriptorFilterService and reloads the 
        ' designers for each Button.
        Public Overrides Sub Initialize(ByVal component As System.ComponentModel.IComponent)

            MyBase.Initialize(component)

            ' Loads the custom service if it has not been loaded already.
            LoadService()

            ' Build list of buttons from Container.Components.
            Dim buttons As New ArrayList()
            Dim c As IComponent
            For Each c In Me.Component.Site.Container.Components
                If TypeOf c Is System.Windows.Forms.Button Then
                    buttons.Add(CType(c, System.Windows.Forms.Button))
                End If
            Next c
            If buttons.Count > 0 Then
                ' Tests each Button for an existing 
                ' ColorCycleButtonDesigner;
        ' if it has no designer of type 
                ' ColorCycleButtonDesigner, adds a designer.
                Dim b As System.Windows.Forms.Button
                For Each b In buttons
                    Dim loaddesigner As Boolean = True
                    ' Gets the attributes for each button.
                    Dim ac As AttributeCollection = TypeDescriptor.GetAttributes(b)
                    Dim i As Integer
                    For i = 0 To ac.Count - 1
                        ' If designer attribute is not for a 
                        ' ColorCycleButtonDesigner, adds a new 
                        ' ColorCycleButtonDesigner.
                        If TypeOf ac(i) Is DesignerAttribute Then
                            Dim da As DesignerAttribute = CType(ac(i), DesignerAttribute)
                            If da.DesignerTypeName.Substring((da.DesignerTypeName.LastIndexOf(".") + 1)) = "ColorCycleButtonDesigner" Then
                                loaddesigner = False
                            End If
                        End If
                    Next i
                    If loaddesigner Then
                        ' Saves the button location so that it 
                        ' can be repositioned.
                        Dim p As Point = b.Location

                        ' Gets an IMenuCommandService to cut and 
                        ' paste control in order to register with 
                        ' selection and movement interface after 
                        ' designer is changed without reloading.
                        Dim imcs As IMenuCommandService = CType(Me.GetService(GetType(IMenuCommandService)), IMenuCommandService)
                        If imcs Is Nothing Then
                            Throw New Exception("Could not obtain IMenuCommandService interface.")
                        End If 

                        ' Gets an ISelectionService to select the 
                        ' button so that it can be cut and pasted.
                        Dim iss As ISelectionService = CType(Me.GetService(GetType(ISelectionService)), ISelectionService)
                        If iss Is Nothing Then
                            Throw New Exception("Could not obtain ISelectionService interface.")
                        End If
                        iss.SetSelectedComponents(New IComponent() {b}, SelectionTypes.Auto)

                        ' Invoke Cut and Paste.
                        imcs.GlobalInvoke(StandardCommands.Cut)
                        imcs.GlobalInvoke(StandardCommands.Paste)

                        ' Regains reference to button from 
                        ' selection service.
                        Dim b2 As System.Windows.Forms.Button = CType(iss.PrimarySelection, System.Windows.Forms.Button)
                        iss.SetSelectedComponents(Nothing)

                        ' Refreshes TypeDescriptor properties of 
                        ' button to load new attributes from 
                        ' ButtonDesignerFilterService.
                        TypeDescriptor.Refresh(b2)
                        b2.Location = p
                        b2.Focus()
                    End If
                Next b
            End If
        End Sub 

        ' Loads a ButtonDesignerFilterService ITypeDescriptorFilterService 
        ' to add ColorCycleButtonDesigner designers to each button.
        Private Sub LoadService()
            ' If no custom ITypeDescriptorFilterService is loaded, 
            ' loads it now.
            If Not serviceloaded Then
                ' Stores the current ITypeDescriptorFilterService 
                ' to restore later.
                Dim tdfs As ITypeDescriptorFilterService = CType(Me.Component.Site.GetService(GetType(ITypeDescriptorFilterService)), ITypeDescriptorFilterService)
                If Not (tdfs Is Nothing) Then
                    oldservice = tdfs
                End If 
                
                ' Retrieves an IDesignerHost interface to use to 
                ' remove and add services.
                Dim dh As IDesignerHost = CType(Me.Component.Site.GetService(GetType(IDesignerHost)), IDesignerHost)
                If dh Is Nothing Then
                    Throw New Exception("Could not obtain IDesignerHost interface.")
                End If 

                ' Removes the standard ITypeDescriptorFilterService.
                dh.RemoveService(GetType(ITypeDescriptorFilterService))
                ' Adds the new custom ITypeDescriptorFilterService.
                dh.AddService(GetType(ITypeDescriptorFilterService), New ButtonDesignerFilterService())
                serviceloaded = True
            End If
        End Sub

        ' Removes the custom service and reloads any stored, 
        ' preexisting service.
        Private Sub RemoveService()
            Dim dh As IDesignerHost = CType(Me.GetService(GetType(IDesignerHost)), IDesignerHost)
            If dh Is Nothing Then
                Throw New Exception("Could not obtain IDesignerHost interface.")
            End If
            dh.RemoveService(GetType(ITypeDescriptorFilterService))
            If Not (oldservice Is Nothing) Then
                dh.AddService(GetType(ITypeDescriptorFilterService), oldservice)
            End If
            serviceloaded = False
        End Sub

        Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
            If serviceloaded Then
                RemoveService()
            End If
        End Sub

    End Class

    ' Provides a TypeDescriptorFilterService to add the 
    ' ColorCycleButtonDesigner using a DesignerAttribute.
    Public Class ButtonDesignerFilterService
        Implements System.ComponentModel.Design.ITypeDescriptorFilterService

        Public oldService As ITypeDescriptorFilterService = Nothing

        Public Sub New()
        End Sub 

        Public Sub New(ByVal oldService_ As ITypeDescriptorFilterService)
            ' Stores any previous ITypeDescriptorFilterService to implement service chaining.
            Me.oldService = oldService_
        End Sub 

        Public Function FilterAttributes(ByVal component As System.ComponentModel.IComponent, ByVal attributes As System.Collections.IDictionary) As Boolean Implements ITypeDescriptorFilterService.FilterAttributes
            If Not (oldService Is Nothing) Then
                oldService.FilterAttributes(component, attributes)
            End If
            ' Creates a designer attribute to compare its TypeID with the TypeID of existing attributes of the component.
            Dim da As New DesignerAttribute(GetType(ColorCycleButtonDesigner))
            ' Adds the designer attribute if the attribute collection does not contain a DesignerAttribute of the same TypeID.
            If TypeOf component Is System.Windows.Forms.Button And attributes.Contains(da.TypeId) Then
                attributes(da.TypeId) = da
            End If
            Return True
        End Function 

        Public Function FilterEvents(ByVal component As System.ComponentModel.IComponent, ByVal events As System.Collections.IDictionary) As Boolean Implements ITypeDescriptorFilterService.FilterEvents
            If Not (oldService Is Nothing) Then
                oldService.FilterEvents(component, events)
            End If
            Return True
        End Function 

        Public Function FilterProperties(ByVal component As System.ComponentModel.IComponent, ByVal properties As System.Collections.IDictionary) As Boolean Implements ITypeDescriptorFilterService.FilterProperties
            If Not (oldService Is Nothing) Then
                oldService.FilterProperties(component, properties)
            End If
            Return True
        End Function 

    End Class   

    ' Designer for a Button control which cycles the background color.
    Public Class ColorCycleButtonDesigner
        Inherits System.Windows.Forms.Design.ControlDesigner

        Private timer1 As System.Windows.Forms.Timer
        Private initial_bcolor, initial_fcolor As Color
        Private r, g, b As Integer
        Private ru, gu, bu, continue_ As Boolean

        Public Sub New()
            timer1 = New System.Windows.Forms.Timer()
            timer1.Interval = 50
            AddHandler timer1.Tick, AddressOf Me.Elapsed
            ru = True
            gu = False
            bu = True
            continue_ = False
            timer1.Start()
        End Sub 

        Private Sub Elapsed(ByVal sender As Object, ByVal e As EventArgs)
            Me.Control.BackColor = Color.FromArgb(r Mod 255, g Mod 255, b Mod 255)
            Me.Control.Refresh()

            ' Updates color.            
            If ru Then
                r += 10
            Else
                If r > 10 Then
                    r -= 10
                End If
            End If
            If gu Then
                g += 10
            Else
                If g > 10 Then
                    g -= 10
                End If
            End If
            If bu Then
                b += 10
            Else
                If b > 10 Then
                    b -= 10
                End If
            End If 

            ' Randomly switches direction of color component values.
            Dim rand As New Random()
            Dim i As Integer
            For i = 0 To 3
                Select Case rand.Next(0, 2)
                    Case 0
                        If ru Then
                            ru = False
                        Else
                            ru = True
                        End If
                    Case 1
                        If gu Then
                            gu = False
                        Else
                            gu = True
                        End If
                    Case 2
                        If bu Then
                            bu = False
                        Else
                            bu = True
                        End If
                End Select
            Next i
            Me.Control.ForeColor = Color.FromArgb((Me.Control.BackColor.R + 128) Mod 255, (Me.Control.BackColor.G + 128) Mod 255, (Me.Control.BackColor.B + 128) Mod 255)
        End Sub 

        Protected Overrides Sub OnMouseEnter()
            If Not timer1.Enabled Then
                initial_bcolor = Me.Control.BackColor
                initial_fcolor = Me.Control.ForeColor
                r = initial_bcolor.R
                g = initial_bcolor.G
                b = initial_bcolor.B
                timer1.Start()
            End If
        End Sub 

        Protected Overrides Sub OnMouseLeave()
            If Not continue_ Then
                continue_ = True
                timer1.Stop()
            Else
                continue_ = False
            End If
            Me.Control.BackColor = initial_bcolor
            Me.Control.ForeColor = initial_fcolor
        End Sub 

        Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
            timer1.Stop()
            Me.Control.BackColor = initial_bcolor
            Me.Control.ForeColor = initial_fcolor
            MyBase.Dispose(disposing)
        End Sub 

    End Class 

    ' System.Windows.Forms.Button associated with the ColorCycleButtonDesigner.
    <Designer(GetType(ColorCycleButtonDesigner))> _
    Public Class ColorCycleButton
        Inherits System.Windows.Forms.Button

        Public Sub New()
        End Sub 
    End Class 

End Namespace 

using System;
using System.Collections;
using System.ComponentModel;
using System.ComponentModel.Design;
using System.ComponentModel.Design.Serialization;
using System.Drawing;
using System.Reflection;
using System.Timers;
using System.Windows.Forms;
using System.Windows.Forms.Design;

namespace ITypeDescriptorFilterSample
{   
    // Component to host the ButtonDesignerFilterComponentDesigner that loads the 
    // ButtonDesignerFilterService ITypeDescriptorFilterService.
    [Designer(typeof(ButtonDesignerFilterComponentDesigner))]
    public class ButtonDesignerFilterComponent : System.ComponentModel.Component
    {       
        public ButtonDesignerFilterComponent(System.ComponentModel.IContainer container)
        {
            container.Add(this);
        }

        public ButtonDesignerFilterComponent()
        {}
    }

    // Provides a designer that can add a ColorCycleButtonDesigner to each 
    // button in a design time project using the ButtonDesignerFilterService 
    // ITypeDescriptorFilterService.
    public class ButtonDesignerFilterComponentDesigner : System.ComponentModel.Design.ComponentDesigner
    {
        // Indicates whether the service has been loaded.
        private bool serviceloaded = false;     
        // Stores any old ITypeDescriptorFilterService to restore later.
        private ITypeDescriptorFilterService oldservice = null;
        
        public ButtonDesignerFilterComponentDesigner()
        {}
        
        // Loads the new ITypeDescriptorFilterService and reloads the 
        // designers for each button.
        public override void Initialize(System.ComponentModel.IComponent component)
        {
            base.Initialize(component);
            
            // Loads the custom service if it has not been loaded already
            LoadService();
            
            // Build list of buttons from Container.Components.
            ArrayList buttons = new ArrayList();
            foreach(IComponent c in this.Component.Site.Container.Components)
                if(c.GetType() == typeof(System.Windows.Forms.Button))
                    buttons.Add((System.Windows.Forms.Button)c);
            if(buttons.Count > 0)
            {       
                // Tests each Button for an existing 
                // ColorCycleButtonDesigner;
                // if it has no designer of type 
                // ColorCycleButtonDesigner, adds a designer.
                foreach(System.Windows.Forms.Button b in buttons)
                {
                    bool loaddesigner = true;
                    // Gets the attributes for each button.
                    AttributeCollection ac = TypeDescriptor.GetAttributes(b);
                    for(int i=0; i<ac.Count; i++)
                    {
                        // If designer attribute is not for a 
                        // ColorCycleButtonDesigner, adds a new 
                        // ColorCycleButtonDesigner.
                        if( ac[i] is DesignerAttribute )
                        {
                            DesignerAttribute da = (DesignerAttribute)ac[i];
                            if( da.DesignerTypeName.Substring(da.DesignerTypeName.LastIndexOf(".")+1) == "ColorCycleButtonDesigner" )
                                loaddesigner = false;
                        }
                    }
                    if(loaddesigner)
                    {
                        // Saves the button location so that it 
                        // can be repositioned.
                        Point p = b.Location;   
                    
                        // Gets an IMenuCommandService to cut and 
                        // paste control in order to register with 
                        // selection and movement interface after 
                        // designer is changed without reloading.
                        IMenuCommandService imcs = (IMenuCommandService)this.GetService(typeof(IMenuCommandService));
                        if( imcs == null )
                            throw new Exception("Could not obtain IMenuCommandService interface.");                         
                        // Gets an ISelectionService to select the 
                        // button so that it can be cut and pasted.
                        ISelectionService iss = (ISelectionService)this.GetService(typeof(ISelectionService));
                        if( iss == null)
                            throw new Exception("Could not obtain ISelectionService interface.");
                        iss.SetSelectedComponents(new IComponent[] { b }, SelectionTypes.Auto);                     
                        // Invoke Cut and Paste.
                        imcs.GlobalInvoke(StandardCommands.Cut);
                        imcs.GlobalInvoke(StandardCommands.Paste);                          
                        // Regains reference to button from 
                        // selection service.
                        System.Windows.Forms.Button b2 = (System.Windows.Forms.Button)iss.PrimarySelection;
                        iss.SetSelectedComponents(null);                            
                        // Refreshes TypeDescriptor properties of 
                        // button to load new attributes from
                        // ButtonDesignerFilterService.
                        TypeDescriptor.Refresh(b2);                         
                        b2.Location = p;
                        b2.Focus();
                    }
                }
            }
        }

        // Loads a ButtonDesignerFilterService ITypeDescriptorFilterService 
        // to add ColorCycleButtonDesigner designers to each button.
        private void LoadService()
        {
            // If no custom ITypeDescriptorFilterService is loaded, 
            // loads it now.
            if(!serviceloaded)
            {
                // Stores the current ITypeDescriptorFilterService 
                // to restore later.
                ITypeDescriptorFilterService tdfs = (ITypeDescriptorFilterService)this.Component.Site.GetService(typeof(ITypeDescriptorFilterService));
                if( tdfs != null )                              
                    oldservice = tdfs;                              
                // Retrieves an IDesignerHost interface to use to 
                // remove and add services.
                IDesignerHost dh = (IDesignerHost)this.Component.Site.GetService(typeof(IDesignerHost));
                if( dh == null )
                    throw new Exception("Could not obtain IDesignerHost interface.");               
                // Removes standard ITypeDescriptorFilterService.
                dh.RemoveService(typeof(ITypeDescriptorFilterService));
                // Adds new custom ITypeDescriptorFilterService.
                dh.AddService(typeof(ITypeDescriptorFilterService), new ButtonDesignerFilterService());             
                serviceloaded = true;
            }
        }
        
        // Removes the custom service and reloads any stored, 
        // preexisting service.
        private void RemoveService()
        {
            IDesignerHost dh = (IDesignerHost)this.GetService(typeof(IDesignerHost));
            if( dh == null )
                throw new Exception("Could not obtain IDesignerHost interface.");
            dh.RemoveService(typeof(ITypeDescriptorFilterService));
            if( oldservice != null )
                dh.AddService(typeof(ITypeDescriptorFilterService), oldservice);
            serviceloaded = false;
        }

        protected override void Dispose(bool disposing)
        {
            if(serviceloaded)
                RemoveService();
        }
    }

    // Provides a TypeDescriptorFilterService to add the 
    // ColorCycleButtonDesigner using a DesignerAttribute.
    public class ButtonDesignerFilterService : System.ComponentModel.Design.ITypeDescriptorFilterService
    {
        public ITypeDescriptorFilterService oldService = null;

        public ButtonDesignerFilterService()
        {}

        public ButtonDesignerFilterService(ITypeDescriptorFilterService oldService_)
        {
            // Stores any previous ITypeDescriptorFilterService to implement service chaining.
            this.oldService = oldService_;
        }

        public bool FilterAttributes(System.ComponentModel.IComponent component, System.Collections.IDictionary attributes)
        {
            if(oldService != null)
                oldService.FilterAttributes(component, attributes);
            
            // Creates a designer attribute to compare its TypeID with the TypeID of existing attributes of the component.
            DesignerAttribute da = new DesignerAttribute(typeof(ColorCycleButtonDesigner));
            // Adds the designer attribute if the attribute collection does not contain a DesignerAttribute of the same TypeID.
            if(component is System.Windows.Forms.Button && attributes.Contains(da.TypeId))
                attributes[da.TypeId]=da;
            return true;
        }

        public bool FilterEvents(System.ComponentModel.IComponent component, System.Collections.IDictionary events)
        {
            if(oldService != null)
                oldService.FilterEvents(component, events);
            return true;
        }

        public bool FilterProperties(System.ComponentModel.IComponent component, System.Collections.IDictionary properties)
        {
            if(oldService != null)
                oldService.FilterProperties(component, properties);
            return true;
        }
    }
    
    // Designer for a Button control which cycles the background color.
    public class ColorCycleButtonDesigner : System.Windows.Forms.Design.ControlDesigner
    {
        private System.Windows.Forms.Timer timer1;
        private Color initial_bcolor, initial_fcolor;
        private int r, g, b;
        private bool ru, gu, bu, continue_;

        public ColorCycleButtonDesigner()
        {                       
            timer1 = new System.Windows.Forms.Timer();
            timer1.Interval = 50;
            timer1.Tick += new EventHandler(this.Elapsed);
            ru = true;
            gu = false;
            bu = true;          
            continue_ = false;
            timer1.Start();
        }

        private void Elapsed(object sender, EventArgs e)
        {
            this.Control.BackColor = Color.FromArgb(r%255, g%255, b%255);
            this.Control.Refresh();

            // Updates color.       
            if(ru)
                r+=10;
            else if(r>10) 
                r-=10;
            if(gu)
                g+=10;
            else if(g>10)
                g-=10;
            if(bu)
                b+=10;
            else if(b>10)
                b-=10;

            // Randomly switches direction of color component values.
            Random rand = new Random();
            for(int i=0; i<4; i++)           
                switch(rand.Next(0, 2))
                {
                    case 0:
                        if(ru)
                            ru=false;
                        else
                            ru=true;
                        break;
                    case 1:
                        if(gu)
                            gu=false;
                        else
                            gu=true;
                        break;
                    case 2:
                        if(bu)
                            bu=false;
                        else
                            bu=true;
                        break;
                }

            this.Control.ForeColor = Color.FromArgb((this.Control.BackColor.R+128)%255, (this.Control.BackColor.G+128)%255, (this.Control.BackColor.B+128)%255);
        }

        protected override void OnMouseEnter()
        {
            if(!timer1.Enabled)
            {
                initial_bcolor = this.Control.BackColor;
                initial_fcolor = this.Control.ForeColor;
                r = initial_bcolor.R;
                g = initial_bcolor.G;
                b = initial_bcolor.B;           
                timer1.Start();
            }
        }

        protected override void OnMouseLeave()
        {
            if(!continue_)
            {
                continue_ = true;
                timer1.Stop();
            }
            else
                continue_ = false;
            
            this.Control.BackColor = initial_bcolor;
            this.Control.ForeColor = initial_fcolor;            
        }

        protected override void Dispose(bool disposing)
        {
            timer1.Stop();
            this.Control.BackColor = initial_bcolor;
            this.Control.ForeColor = initial_fcolor;
            base.Dispose(disposing);
        }
    }

    // System.Windows.Forms.Button associated with the ColorCycleButtonDesigner.
    [Designer(typeof(ColorCycleButtonDesigner))]
    public class ColorCycleButton : System.Windows.Forms.Button
    {
        public ColorCycleButton()
        {}
    }
}

#using <System.Windows.Forms.dll>
#using <System.Drawing.dll>
#using <System.Design.dll>
#using <System.dll>

using namespace System;
using namespace System::Collections;
using namespace System::ComponentModel;
using namespace System::ComponentModel::Design;
using namespace System::ComponentModel::Design::Serialization;
using namespace System::Drawing;
using namespace System::Reflection;
using namespace System::Timers;
using namespace System::Windows::Forms;
using namespace System::Windows::Forms::Design;

// Designer for a Button control which cycles the background color.
public ref class ColorCycleButtonDesigner: public System::Windows::Forms::Design::ControlDesigner
{
private:
   System::Windows::Forms::Timer^ timer1;
   Color initial_bcolor;
   Color initial_fcolor;
   int r;
   int g;
   int b;
   bool ru;
   bool gu;
   bool bu;
   bool continue_;

public:
   ColorCycleButtonDesigner()
   {
      timer1 = gcnew System::Windows::Forms::Timer;
      timer1->Interval = 50;
      timer1->Tick += gcnew EventHandler( this, &ColorCycleButtonDesigner::Elapsed );
      ru = true;
      gu = false;
      bu = true;
      continue_ = false;
      timer1->Start();
   }

private:
   void Elapsed( Object^ /*sender*/, EventArgs^ /*e*/ )
   {
      this->Control->BackColor = Color::FromArgb( r % 255, g % 255, b % 255 );
      this->Control->Refresh();
      
      // Updates color.
      if ( ru )
            r += 10;
      else
      if ( r > 10 )
            r -= 10;

      if ( gu )
            g += 10;
      else
      if ( g > 10 )
            g -= 10;

      if ( bu )
            b += 10;
      else
      if ( b > 10 )
            b -= 10;
      
      // Randomly switches direction of color component values.
      Random^ rand = gcnew Random;
      for ( int i = 0; i < 4; i++ )
         switch ( rand->Next( 0, 2 ) )
         {
            case 0:
               if ( ru )
                              ru = false;
               else
                              ru = true;

               break;

            case 1:
               if ( gu )
                              gu = false;
               else
                              gu = true;

               break;

            case 2:
               if ( bu )
                              bu = false;
               else
                              bu = true;

               break;
         }
      this->Control->ForeColor = Color::FromArgb( (this->Control->BackColor.R + 128) % 255, (this->Control->BackColor.G + 128) % 255, (this->Control->BackColor.B + 128) % 255 );
   }

protected:
   virtual void OnMouseEnter() override
   {
      if (  !timer1->Enabled )
      {
         initial_bcolor = this->Control->BackColor;
         initial_fcolor = this->Control->ForeColor;
         r = initial_bcolor.R;
         g = initial_bcolor.G;
         b = initial_bcolor.B;
         timer1->Start();
      }
   }

   virtual void OnMouseLeave() override
   {
      if (  !continue_ )
      {
         continue_ = true;
         timer1->Stop();
      }
      else
            continue_ = false;

      this->Control->BackColor = initial_bcolor;
      this->Control->ForeColor = initial_fcolor;
   }

public:
   ~ColorCycleButtonDesigner()
   {
      timer1->Stop();
      this->Control->BackColor = initial_bcolor;
      this->Control->ForeColor = initial_fcolor;
   }
};

// Provides a TypeDescriptorFilterService to add the
// ColorCycleButtonDesigner using a DesignerAttribute.
public ref class ButtonDesignerFilterService: public System::ComponentModel::Design::ITypeDescriptorFilterService
{
public:
   ITypeDescriptorFilterService^ oldService;
   ButtonDesignerFilterService(){}

   ButtonDesignerFilterService( ITypeDescriptorFilterService^ oldService_ )
   {
      // Stores any previous ITypeDescriptorFilterService to implement service chaining.
      this->oldService = oldService_;
   }

   virtual bool FilterAttributes( System::ComponentModel::IComponent^ component, System::Collections::IDictionary^ attributes )
   {
      if ( oldService != nullptr )
            oldService->FilterAttributes( component, attributes );

      // Creates a designer attribute to compare its TypeID with the TypeID of existing attributes of the component.
      DesignerAttribute^ da = gcnew DesignerAttribute( ColorCycleButtonDesigner::typeid );
      // Adds the designer attribute if the attribute collection does not contain a DesignerAttribute of the same TypeID.
      if ( dynamic_cast<System::Windows::Forms::Button^>(component) && attributes->Contains( da->TypeId ) )
            attributes[ da->TypeId ] = da;

      return true;
   }

   virtual bool FilterEvents( System::ComponentModel::IComponent^ component, System::Collections::IDictionary^ events )
   {
      if ( oldService != nullptr )
            oldService->FilterEvents( component, events );

      return true;
   }

   virtual bool FilterProperties( System::ComponentModel::IComponent^ component, System::Collections::IDictionary^ properties )
   {
      if ( oldService != nullptr )
            oldService->FilterProperties( component, properties );

      return true;
   }
};


// System.Windows.Forms.Button associated with the ColorCycleButtonDesigner.

[Designer(ColorCycleButtonDesigner::typeid)]
public ref class ColorCycleButton: public System::Windows::Forms::Button
{
public:
   ColorCycleButton(){}

};


// Provides a designer that can add a ColorCycleButtonDesigner to each
// button in a design time project using the ButtonDesignerFilterService
// ITypeDescriptorFilterService.
public ref class ButtonDesignerFilterComponentDesigner: public System::ComponentModel::Design::ComponentDesigner
{
private:

   // Indicates whether the service has been loaded.
   bool serviceloaded;

   // Stores any old ITypeDescriptorFilterService to restore later.
   ITypeDescriptorFilterService^ oldservice;

public:
   ButtonDesignerFilterComponentDesigner()
   {
      serviceloaded = false;
   }

   // Loads the new ITypeDescriptorFilterService and reloads the
   // designers for each button.
   virtual void Initialize( System::ComponentModel::IComponent^ component ) override
   {
      ComponentDesigner::Initialize( component );

      // Loads the custom service if it has not been loaded already
      LoadService();

      // Build list of buttons from Container.Components.
      ArrayList^ buttons = gcnew ArrayList;
      IEnumerator^ myEnum = this->Component->Site->Container->Components->GetEnumerator();
      while ( myEnum->MoveNext() )
      {
         IComponent^ c = safe_cast<IComponent^>(myEnum->Current);
         if ( c->GetType() == System::Windows::Forms::Button::typeid )
                  buttons->Add( dynamic_cast<System::Windows::Forms::Button^>(c) );
      }

      if ( buttons->Count > 0 )
      {
         // Tests each Button for an existing
         // ColorCycleButtonDesigner;
         // if it has no designer of type
         // ColorCycleButtonDesigner, adds a designer.
         IEnumerator^ myEnum1 = buttons->GetEnumerator();
         while ( myEnum1->MoveNext() )
         {
            Button^ b = safe_cast<Button^>(myEnum1->Current);
            bool loaddesigner = true;

            // Gets the attributes for each button.
            AttributeCollection^ ac = TypeDescriptor::GetAttributes( b );
            for ( int i = 0; i < ac->Count; i++ )
            {
               // If designer attribute is not for a
               // ColorCycleButtonDesigner, adds a new
               // ColorCycleButtonDesigner.
               if ( dynamic_cast<DesignerAttribute^>(ac[ i ]) )
               {
                  DesignerAttribute^ da = dynamic_cast<DesignerAttribute^>(ac[ i ]);
                  if ( da->DesignerTypeName->Substring( da->DesignerTypeName->LastIndexOf( "." ) + 1 )->Equals( "ColorCycleButtonDesigner" ) )
                                    loaddesigner = false;
               }
            }
            if ( loaddesigner )
            {
               // Saves the button location so that it
               // can be repositioned.
               Point p = b->Location;

               // Gets an IMenuCommandService to cut and
               // paste control in order to register with
               // selection and movement interface after
               // designer is changed without reloading.
               IMenuCommandService^ imcs = dynamic_cast<IMenuCommandService^>(this->GetService( IMenuCommandService::typeid ));
               if ( imcs == nullptr )
                              throw gcnew Exception( "Could not obtain IMenuCommandService interface." );

               // Gets an ISelectionService to select the
               // button so that it can be cut and pasted.
               ISelectionService^ iss = dynamic_cast<ISelectionService^>(this->GetService( ISelectionService::typeid ));
               if ( iss == nullptr )
                              throw gcnew Exception( "Could not obtain ISelectionService interface." );
               array<IComponent^>^temp0 = {b};
               iss->SetSelectedComponents( dynamic_cast<ICollection^>(temp0), SelectionTypes::Normal );

               // Invoke Cut and Paste.
               imcs->GlobalInvoke( StandardCommands::Cut );
               imcs->GlobalInvoke( StandardCommands::Paste );

               // Regains reference to button from
               // selection service.
               System::Windows::Forms::Button^ b2 = dynamic_cast<System::Windows::Forms::Button^>(iss->PrimarySelection);
               iss->SetSelectedComponents( nullptr );

               // Refreshes TypeDescriptor properties of
               // button to load new attributes from
               // ButtonDesignerFilterService.
               TypeDescriptor::Refresh( b2 );
               b2->Location = p;
               b2->Focus();
            }
         }
      }
   }


private:

   // Loads a ButtonDesignerFilterService ITypeDescriptorFilterService
   // to add ColorCycleButtonDesigner designers to each button.
   void LoadService()
   {
      // If no custom ITypeDescriptorFilterService is loaded,
      // loads it now.
      if (  !serviceloaded )
      {
         // Stores the current ITypeDescriptorFilterService
         // to restore later.
         ITypeDescriptorFilterService^ tdfs = dynamic_cast<ITypeDescriptorFilterService^>(this->Component->Site->GetService( ITypeDescriptorFilterService::typeid ));
         if ( tdfs != nullptr )
                  oldservice = tdfs;

         // Retrieves an IDesignerHost interface to use to
         // remove and add services.
         IDesignerHost^ dh = dynamic_cast<IDesignerHost^>(this->Component->Site->GetService( IDesignerHost::typeid ));
         if ( dh == nullptr )
                  throw gcnew Exception( "Could not obtain IDesignerHost interface." );

         // Removes standard ITypeDescriptorFilterService.
         dh->RemoveService( ITypeDescriptorFilterService::typeid );

         // Adds new custom ITypeDescriptorFilterService.
         dh->AddService( ITypeDescriptorFilterService::typeid, gcnew ButtonDesignerFilterService );
         serviceloaded = true;
      }
   }

   // Removes the custom service and reloads any stored,
   // preexisting service.
   void RemoveService()
   {
      IDesignerHost^ dh = dynamic_cast<IDesignerHost^>(this->GetService( IDesignerHost::typeid ));
      if ( dh == nullptr )
            throw gcnew Exception( "Could not obtain IDesignerHost interface." );

      dh->RemoveService( ITypeDescriptorFilterService::typeid );
      if ( oldservice != nullptr )
            dh->AddService( ITypeDescriptorFilterService::typeid, oldservice );

      serviceloaded = false;
   }

public:
   ~ButtonDesignerFilterComponentDesigner()
   {
      if ( serviceloaded )
         RemoveService();
   }
};

// Component to host the ButtonDesignerFilterComponentDesigner that loads the
// ButtonDesignerFilterService ITypeDescriptorFilterService.

[Designer(ButtonDesignerFilterComponentDesigner::typeid)]
public ref class ButtonDesignerFilterComponent: public System::ComponentModel::Component
{
public:
   ButtonDesignerFilterComponent( System::ComponentModel::IContainer^ container )
   {
      container->Add( this );
   }

   ButtonDesignerFilterComponent(){}
};

package ITypeDescriptorFilterSample;

import System.*;
import System.Collections.*;
import System.ComponentModel.*;
import System.ComponentModel.Design.*;
import System.ComponentModel.Design.Serialization.*;
import System.Drawing.*;
import System.Reflection.*;
import System.Timers.*;
import System.Windows.Forms.*;
import System.Windows.Forms.Design.*;

// Component to host the ButtonDesignerFilterComponentDesigner that loads the 
// ButtonDesignerFilterService ITypeDescriptorFilterService.
/** @attribute Designer(ButtonDesignerFilterComponentDesigner.class)
 */
public class ButtonDesignerFilterComponent
    extends System.ComponentModel.Component
{     
    public ButtonDesignerFilterComponent(System.ComponentModel.
        IContainer container) 
    {
        container.Add(this);
    } //ButtonDesignerFilterComponent
         
    public ButtonDesignerFilterComponent() 
    {
    } //ButtonDesignerFilterComponent
} //ButtonDesignerFilterComponent
      
// Provides a designer that can add a ColorCycleButtonDesigner to each 
// button in a design time project using the ButtonDesignerFilterService 
// ITypeDescriptorFilterService.
public class ButtonDesignerFilterComponentDesigner
    extends System.ComponentModel.Design.ComponentDesigner
{
    // Indicates whether the service has been loaded.
    private boolean serviceLoaded = false;
    // Stores any old ITypeDescriptorFilterService to restore later.
    private ITypeDescriptorFilterService oldService = null;
     
    public ButtonDesignerFilterComponentDesigner()
    {
    } //ButtonDesignerFilterComponentDesigner

    // Loads the new ITypeDescriptorFilterService and reloads the 
    // designers for each button.
    public void Initialize(System.ComponentModel.IComponent component)
        throws Exception
    {
        super.Initialize(component);
        // Loads the custom service if it has not been loaded already
        LoadService();
         
        // Build list of buttons from Container.Components.
        ArrayList buttons =  new ArrayList();
        for(int iCtr = 0; iCtr < this.get_Component().get_Site().
            get_Container().get_Components().get_Count(); iCtr++) {
            
            IComponent c = this.get_Component().get_Site().get_Container().
                get_Components().get_Item(iCtr);
            if(c.GetType().Equals(System.Windows.Forms.
                Button.class.ToType())) {
                buttons.Add((System.Windows.Forms.Button)c);
            }
        }

        if (buttons.get_Count() > 0) {
            // Tests each Button for an existing 
            // ColorCycleButtonDesigner;
            // if it has no designer of type 
            // ColorCycleButtonDesigner, adds a designer.
            for (int iCtr=0; iCtr<buttons.get_Count(); iCtr++ ){                
                System.Windows.Forms.Button b =(System.Windows.
                    Forms.Button) buttons.get_Item(iCtr);
                boolean loadDesigner = true;
                // Gets the attributes for each button.
                AttributeCollection ac = TypeDescriptor.GetAttributes(b);
                for (int i = 0; i < ac.get_Count(); i++) {
                    // If designer attribute is not for a 
                    // ColorCycleButtonDesigner, adds a new 
                    // ColorCycleButtonDesigner.
                    if (ac.get_Item(i) instanceof DesignerAttribute) {
                        DesignerAttribute da = (DesignerAttribute)ac.
                        get_Item(i);

                        if (da.get_DesignerTypeName().Substring((da.
                            get_DesignerTypeName().LastIndexOf(".")+ 1)).
                            Equals("ColorCycleButtonDesigner")) {
                            loadDesigner = false;
                        }
                    }
                }
                if (loadDesigner) {
                    // Saves the button location so that it 
                    // can be repositioned.
                    Point p = b.get_Location();
                    // Gets an IMenuCommandService to cut and 
                    // paste control in order to register with 
                    // selection and movement interface after 
                    // designer is changed without reloading.
                    IMenuCommandService imcs = (IMenuCommandService)(this.
                        GetService(IMenuCommandService.class.ToType()));
                    if (imcs == null) {
                        throw new Exception("Could not obtain" 
                            + "ISelectionService interface.");
                    }
                    // Gets an ISelectionService to select the 
                    // button so that it can be cut and pasted.
                    ISelectionService iss = (ISelectionService)this.
                        GetService(ISelectionService.class.ToType());
                        if (iss == null) {
                            throw new Exception("Could not obtain"
                                + "ISelectionService interface.");
                    }
                    iss.SetSelectedComponents(new IComponent[] {b},
                        SelectionTypes.Normal);
                    
                    // Invoke Cut and Paste.
                    imcs.GlobalInvoke(StandardCommands.Cut);
                    imcs.GlobalInvoke(StandardCommands.Paste);
                    // Regains reference to button from 
                        
                    // selection service.
                    System.Windows.Forms.Button b2 = (System.Windows.
                        Forms.Button)iss.get_PrimarySelection();
                    iss.SetSelectedComponents(null);
                    // Refreshes TypeDescriptor properties of 
                    // button to load new attributes from
                    // ButtonDesignerFilterService.
                    TypeDescriptor.Refresh(b2);
                    b2.set_Location(p);
                    b2.Focus();
                }
            }
        }
    } //Initialize
      
    // Loads a ButtonDesignerFilterService ITypeDescriptorFilterService 
    // to add ColorCycleButtonDesigner designers to each button.
    private void LoadService() throws Exception 
    {
        // If no custom ITypeDescriptorFilterService is loaded, 
        // loads it now.
        if (!(serviceLoaded)) {
            // Stores the current ITypeDescriptorFilterService 
            // to restore later.
            ITypeDescriptorFilterService tdfs =
                (ITypeDescriptorFilterService)(this.get_Component().get_Site().
                GetService(ITypeDescriptorFilterService.class.ToType()));
            if (tdfs != null) {
                oldService = tdfs;
            }
            // Retrieves an IDesignerHost interface to use to 
            // remove and add services.
            IDesignerHost dh = (IDesignerHost) this.get_Component().
                get_Site().GetService(IDesignerHost.class.ToType());
            
            if (dh == null) {
                throw new Exception("Could not obtain IDesignerHost interface.");
            }
            // Removes standard ITypeDescriptorFilterService.
            dh.RemoveService(ITypeDescriptorFilterService.class.ToType());
            // Adds new custom ITypeDescriptorFilterService.
            dh.AddService(ITypeDescriptorFilterService.class.ToType(),
                new ButtonDesignerFilterService());
            serviceLoaded = true;
        }
    } //LoadService
      
    // Removes the custom service and reloads any stored, 
    // preexisting service.
    private void RemoveService() throws Exception 
    {
        IDesignerHost dh 
            = (IDesignerHost)(this.GetService(IDesignerHost.class.ToType()));
        if (dh == null) {
            throw new Exception("Could not obtain IDesignerHost interface.");
        }
        dh.RemoveService(ITypeDescriptorFilterService.class.ToType());
        if (oldService != null) {
            dh.AddService(ITypeDescriptorFilterService.
                class.ToType(),oldService);
        }
        serviceLoaded = false;
    } //RemoveService
      
    protected void Dispose(boolean disposing) throws Exception
    {
        if (serviceLoaded) {
            RemoveService();
        }
    } //Dispose
} //ButtonDesignerFilterComponentDesigner
 
// Provides a TypeDescriptorFilterService to add the 
// ColorCycleButtonDesigner using a DesignerAttribute.
public class ButtonDesignerFilterService
    implements System.ComponentModel.Design.ITypeDescriptorFilterService
{
    public ITypeDescriptorFilterService oldService = null;
    public ButtonDesignerFilterService() 
    {
    } //ButtonDesignerFilterService
    
    public ButtonDesignerFilterService(
        ITypeDescriptorFilterService oldService_) 
    {
        // Stores any previous ITypeDescriptorFilterService to implement 
        //service chaining.
        this.oldService = oldService_;
    } //ButtonDesignerFilterService
     
    public boolean FilterAttributes(System.ComponentModel.IComponent component,
        System.Collections.IDictionary attributes) 
    {
        if (oldService != null ) {
            oldService.FilterAttributes(component, attributes);
        }
         
        // Creates a designer attribute to compare its TypeID with the TypeID
        //of existing attributes of the component.
        DesignerAttribute da = new DesignerAttribute(ColorCycleButtonDesigner
            .class.ToType());
        // Adds the designer attribute if the attribute collection does not
        //contain a DesignerAttribute of the same TypeID.
        if (component instanceof System.Windows.Forms.Button 
            && attributes.Contains(da.get_TypeId())) {
            attributes.set_Item( da.get_TypeId(), da );
        }
        return true ;
    } //FilterAttributes
      
    public boolean FilterEvents(System.ComponentModel.IComponent component,
        System.Collections.IDictionary events) 
    {
        if (oldService != null) {
            oldService.FilterEvents(component, events);
        }
        return true ;
    } //FilterEvents

    public boolean FilterProperties(System.ComponentModel.IComponent component,
        System.Collections.IDictionary properties)    
    {
        if (oldService  != null) {
            oldService.FilterProperties(component, properties);
        }
        return true ;
    } //FilterProperties
} //ButtonDesignerFilterService

// Designer for a Button control which cycles the background color.
public class ColorCycleButtonDesigner
    extends System.Windows.Forms.Design.ControlDesigner
{
    private System.Windows.Forms.Timer timer1;
    private Color initial_bcolor, initial_fcolor;
    private int r, g, b;
    private boolean ru, gu, bu, continue_;
      
    public ColorCycleButtonDesigner()
    {
        timer1 = new System.Windows.Forms.Timer();
        timer1.set_Interval(50);
        timer1.add_Tick(new EventHandler(this.Elapsed));
        ru = true;
        gu = false;
        bu = true;
        continue_ = false;
        timer1.Start();
    } //ColorCycleButtonDesigner
      
    private void Elapsed(Object sender, EventArgs e) 
    {
        this.get_Control().set_BackColor(Color.FromArgb(r % 255,
            g % 255, b % 255));
        this.get_Control().Refresh();
         
        // Updates color.        
        if (ru) {
            r += 10;
        }
        else {
            if (r > 10) {
                r -= 10;
            }
        }
        if( gu) {
            g += 10;
        }
        else {
            if (g > 10) {
                g -= 10;
            }
        }
        if (bu) {
            b += 10;
        }
        else {
            if ( b > 10  ) {
                b -= 10;
            }
        } 
        // Randomly switches direction of color component values.
        Random rand =  new Random();
        for (int i=0; i < 4; i++) {
            switch (rand.Next(0, 2)) {
                case 0 : 
                    if (ru) {
                    ru = false;
                    }
                    else {
                        ru = true;
                    }
                    break;
                case 1 : 
                    if (gu) {
                        gu = false;
                    }
                    else {
                        gu = true;
                    }
                    break;
                case 2 : 
                    if (bu) {
                        bu = false;
                    }
                    else {
                        bu = true;
                    }
                    break;
            }
        }  
        this.get_Control().set_ForeColor(Color.FromArgb((this.get_Control().
            get_BackColor().get_R() + 128) % 255,(this.get_Control().
            get_BackColor().get_G() + 128) % 255,(this.get_Control().
            get_BackColor().get_B() + 128) % 255));
    } //Elapsed
      
    protected void OnMouseEnter() 
    {
        if (!(timer1.get_Enabled())) {
            initial_bcolor = this.get_Control().get_BackColor();
            initial_fcolor = this.get_Control().get_ForeColor();
            r = initial_bcolor.get_R();
            g = initial_bcolor.get_G();
            b = initial_bcolor.get_B();
            timer1.Start();
        }
    } //OnMouseEnter
     
    protected void OnMouseLeave()
    {
        if (!(continue_)) {
            continue_ = true;
            timer1.Stop();
        }
        else {
            continue_ = false;
        } 
        this.get_Control().set_BackColor(initial_bcolor);
        this.get_Control().set_ForeColor(initial_fcolor);
    } //OnMouseLeave
    protected void Dispose(boolean disposing) 
    {
        timer1.Stop();
        this.get_Control().set_BackColor(initial_bcolor);
        this.get_Control().set_ForeColor(initial_fcolor);
        super.Dispose(disposing);
    } //Dispose
} //ColorCycleButtonDesigner
  
// System.Windows.Forms.Button associated with the ColorCycleButtonDesigner.
/** @attribute Designer(ColorCycleButtonDesigner.class)
 */
public class ColorCycleButton extends System.Windows.Forms.Button
{
    public ColorCycleButton() 
    {
    } //ColorCycleButton
} //ColorCycleButton

Plattformen

Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

.NET Framework unterstützt nicht alle Versionen sämtlicher Plattformen. Eine Liste der unterstützten Versionen finden Sie unter Systemanforderungen.

Versionsinformationen

.NET Framework

Unterstützt in: 2.0, 1.1, 1.0

Siehe auch

Referenz

ITypeDescriptorFilterService-Member
System.ComponentModel.Design-Namespace
TypeDescriptor-Klasse
EventDescriptor-Klasse
PropertyDescriptor-Klasse
Attribute
IDictionary