ITypeDescriptorFilterService インターフェイス
デザイン モードでコンポーネントの一連のメンバ記述子を変更するためのインターフェイスを提供します。
この型のすべてのメンバの一覧については、ITypeDescriptorFilterService メンバ を参照してください。
Public Interface ITypeDescriptorFilterService
[C#]
public interface ITypeDescriptorFilterService
[C++]
public __gc __interface ITypeDescriptorFilterService
[JScript]
public interface ITypeDescriptorFilterService
ITypeDescriptorFilterService を実装するクラス
| クラス | 説明 |
|---|---|
| ComponentDocumentDesigner | 入れ子になったコンポーネントをサポートするルート デザイン ドキュメントのデザイン時の動作を拡張するための基本デザイナ クラス。 |
解説
ITypeDescriptorFilterService は、 TypeDescriptor を通じてコンポーネントが提供する一連の記述子を変更するために、コンポーネントが実装できるインターフェイスを提供します。 TypeDescriptor は、プロパティ、属性、およびイベントを表す記述子を提供する前に、 ITypeDescriptorFilterService サービスについてコンポーネントのサイトを照会します。
実装時の注意: TypeDescriptor によって公開されているメンバ記述子をフィルタ処理するには、このインターフェイスをコンポーネントに実装し、このクラスの FilterAttributes 、 FilterEvents 、または FilterProperties の各メソッドをオーバーライドして、属性、イベント、またはプロパティをそれぞれフィルタ処理します。
使用例
[Visual Basic, C#, C++] ITypeDescriptorFilterService を使用して、ボタンのデザイナを読み込み、または再読み込みする前に、新しいデザイナのデザイナ属性を追加し、新規または既存の System.Windows.Forms.Button の属性コレクションをフィルタ処理するデザイナの例を次に示します。
[Visual Basic, C#, C++] この例を使用するには、コードをクラス ライブラリとしてコンパイルし、[ ツールボックス アイテムの追加と削除] コマンドを使用して、Windows フォーム プロジェクトのツールボックスにクラス ライブラリからコンポーネントを読み込みます。フォームにボタンをいくつか追加します。 ButtonDesignerFilterComponent をフォームに追加すると、コンポーネント トレイに表示されます。 ButtonDesignerFilterComponent は、 ButtonDesignerFilterService ITypeDescriptorFilterService をデザイン モード サービス プロバイダとして追加します。 ButtonDesignerFilterService が、既存または新しい任意の各ボタンに対するデザイナを ColorCycleButtonDesigner に置き換えると、フォーム上の既存または新規の System.Windows.Forms.Button オブジェクトは、色の周期的な変化を開始します。各ボタンはマウスを上に移動すると色が周期的に変化し、MouseLeave イベントに基づいて背景色と前景色の周期的変化またはリセットを交互に繰り返します。 ButtonDesignerFilterComponent が破棄され、元の ITypeDescriptorFilterService を置き換えるまで、読み込まれた ButtonDesignerFilterService ITypeDescriptorFilterService の FilterAttributes メソッドを通じて、新しい System.Windows.Forms.Button オブジェクトに ColorCycleButtonDesigner が指定されます。この例の ColorCycleButton クラスは、 ColorCycleButtonDesigner に関連付けられた System.Windows.Forms.Button です。
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.Normal)
' 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
[C#]
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.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.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()
{}
}
}
[C++]
#using <mscorlib.dll>
#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;
namespace ITypeDescriptorFilterSample
{
// Designer for a Button control which cycles the background color.
public __gc class ColorCycleButtonDesigner : public System::Windows::Forms::Design::ControlDesigner
{
private:
System::Windows::Forms::Timer* timer1;
Color initial_bcolor, initial_fcolor;
int r, g, b;
bool ru, gu, bu, continue_;
public:
ColorCycleButtonDesigner()
{
timer1 = new System::Windows::Forms::Timer();
timer1->Interval = 50;
timer1->Tick += new 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 = 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:
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();
}
}
void OnMouseLeave()
{
if(!continue_)
{
continue_ = true;
timer1->Stop();
}
else
continue_ = false;
this->Control->BackColor = initial_bcolor;
this->Control->ForeColor = initial_fcolor;
}
void Dispose(bool disposing)
{
timer1->Stop();
this->Control->BackColor = initial_bcolor;
this->Control->ForeColor = initial_fcolor;
ControlDesigner::Dispose(disposing);
}
};
// Provides a TypeDescriptorFilterService to add the
// ColorCycleButtonDesigner using a DesignerAttribute.
public __gc 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_;
}
bool FilterAttributes(System::ComponentModel::IComponent* component, System::Collections::IDictionary* attributes)
{
if(oldService != 0)
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(dynamic_cast<System::Windows::Forms::Button*>(component) && attributes->Contains(da->TypeId))
attributes->Item[da->TypeId]=da;
return true;
}
bool FilterEvents(System::ComponentModel::IComponent* component, System::Collections::IDictionary* events)
{
if(oldService != 0)
oldService->FilterEvents(component, events);
return true;
}
bool FilterProperties(System::ComponentModel::IComponent* component, System::Collections::IDictionary* properties)
{
if(oldService != 0)
oldService->FilterProperties(component, properties);
return true;
}
};
// System.Windows.Forms.Button associated with the ColorCycleButtonDesigner.
[Designer(__typeof(ColorCycleButtonDesigner))]
public __gc 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 __gc class ButtonDesignerFilterComponentDesigner : public System::ComponentModel::Design::ComponentDesigner
{
// Indicates whether the service has been loaded.
private:
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.
void Initialize(System::ComponentModel::IComponent* component)
{
ComponentDesigner::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();
IEnumerator* myEnum = this->Component->Site->Container->Components->GetEnumerator();
while (myEnum->MoveNext())
{
IComponent* c = __try_cast<IComponent*>(myEnum->Current);
if(c->GetType() == __typeof(System::Windows::Forms::Button))
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 = __try_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->Item[i]) )
{
DesignerAttribute* da = dynamic_cast<DesignerAttribute*>(ac->Item[i]);
if( da->DesignerTypeName->Substring(da->DesignerTypeName->LastIndexOf(S".")+1)->Equals(S"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(__typeof(IMenuCommandService)));
if( imcs == 0 )
throw new Exception(S"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(__typeof(ISelectionService)));
if( iss == 0)
throw new Exception(S"Could not obtain ISelectionService interface.");
IComponent* temp0 [] = {b};
iss->SetSelectedComponents(dynamic_cast<ICollection __gc *>(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(0);
// 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 = dynamic_cast<ITypeDescriptorFilterService*>(this->Component->Site->GetService(__typeof(ITypeDescriptorFilterService)));
if( tdfs != 0 )
oldservice = tdfs;
// Retrieves an IDesignerHost interface to use to
// remove and add services.
IDesignerHost* dh = dynamic_cast<IDesignerHost*>(this->Component->Site->GetService(__typeof(IDesignerHost)));
if( dh == 0 )
throw new Exception(S"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.
void RemoveService()
{
IDesignerHost* dh = dynamic_cast<IDesignerHost*>(this->GetService(__typeof(IDesignerHost)));
if( dh == 0 )
throw new Exception(S"Could not obtain IDesignerHost interface.");
dh->RemoveService(__typeof(ITypeDescriptorFilterService));
if( oldservice != 0 )
dh->AddService(__typeof(ITypeDescriptorFilterService), oldservice);
serviceloaded = false;
}
protected:
void Dispose(bool /*disposing*/)
{
if(serviceloaded)
RemoveService();
}
};
// Component to host the ButtonDesignerFilterComponentDesigner that loads the
// ButtonDesignerFilterService ITypeDescriptorFilterService.
[Designer(__typeof(ButtonDesignerFilterComponentDesigner))]
public __gc class ButtonDesignerFilterComponent : public System::ComponentModel::Component
{
public:
ButtonDesignerFilterComponent(System::ComponentModel::IContainer* container)
{
container->Add(this);
}
ButtonDesignerFilterComponent()
{}
};
}
[JScript] JScript のサンプルはありません。Visual Basic、C#、および C++ のサンプルを表示するには、このページの左上隅にある言語のフィルタ ボタン .gif)
をクリックします。
必要条件
名前空間: System.ComponentModel.Design
プラットフォーム: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 ファミリ
アセンブリ: System (System.dll 内)
参照
ITypeDescriptorFilterService メンバ | System.ComponentModel.Design 名前空間