ITypeDescriptorFilterService 인터페이스
정의
중요
일부 정보는 릴리스되기 전에 상당 부분 수정될 수 있는 시험판 제품과 관련이 있습니다. Microsoft는 여기에 제공된 정보에 대해 어떠한 명시적이거나 묵시적인 보증도 하지 않습니다.
디자인 모드에서 구성 요소에 대한 멤버 설명자의 집합을 수정할 수 있는 인터페이스를 제공합니다.
public interface class ITypeDescriptorFilterService
public interface ITypeDescriptorFilterService
type ITypeDescriptorFilterService = interface
Public Interface ITypeDescriptorFilterService
- 파생
예제
다음 코드 예제에서는 사용 하는 디자이너를 보여 ITypeDescriptorFilterService 줍니다.는 새 디자이너에 대 한 디자이너 특성을 추가 하는 새 또는 기존 Button 의 특성 컬렉션을 필터링 하는 단추에 대 한 디자이너를 로드 하거나 다시 로드 하기 전에.
이 예제를 사용하려면 코드를 Windows Forms 프로젝트에 추가하고 클래스 라이브러리의 구성 요소를 도구 상자에 로드합니다.
또한 연습: 사용자 지정 구성 요소로 도구 상자 자동 채우기를 참조하세요.
양식에 일부 단추를 추가합니다. 폼에 을 ButtonDesignerFilterComponent
추가하면 구성 요소 트레이에 표시됩니다. 는 ButtonDesignerFilterComponent
를 구현하는 를 디자인 모드 서비스 공급자로 추가 ButtonDesignerFilterService
합니다 ITypeDescriptorFilterService. 양식의 기존 또는 새 개체는 가 각 기존 단추와 새 Button 단추의 디자이너를 로 바꾼 후 ButtonDesignerFilterService
색 순환을 ColorCycleButtonDesigner
시작합니다. 단추는 마우스 포인터를 위로 이동할 때 색 주기를 지정하고, 또는 순환을 계속하거나 이벤트의 배경색과 전경색 MouseLeave
을 다시 설정합니다. 새 Button 개체는 가 삭제되고 원래 ITypeDescriptorFilterService를 바꿀 때까지 ButtonDesignerFilterComponent
로드된 의 ButtonDesignerFilterService
메서드를 통해 FilterAttributes 에 제공됩니다ColorCycleButtonDesigner
. ColorCycleButton
이 예제의 클래스는 와 연결된 입니다 ButtonColorCycleButtonDesigner
.
#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(){}
};
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()
{}
}
}
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
Public Sub New()
End Sub
End Class
' 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 (tdfs IsNot 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 (oldservice IsNot 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 (oldService IsNot 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 (oldService IsNot 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 (oldService IsNot 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
설명
인터페이스는 ITypeDescriptorFilterService 디자인 타임에 구성 요소의 속성, 이벤트 및 클래스 수준 특성을 수정할 수 있는 인터페이스를 제공합니다. 이 수정은 구성 요소가 를 통해 제공하는 설명자 집합을 TypeDescriptor통해 발생합니다. 형식 설명자는 서비스에 대한 ITypeDescriptorFilterService 구성 요소의 사이트를 쿼리하고, 있는 경우 형식 설명자가 수집한 모든 메타데이터를 이 서비스에 전달합니다. 그런 다음, 서비스는 구성 요소의 기존 특성을 추가, 제거 및 변경하여 메타데이터를 수정할 수 있습니다.
예를 들어 구성 요소의 속성은 메서드 호출을 FilterProperties 통해 수정할 수 있습니다. 필터 서비스는 속성 이름과 형식 PropertyDescriptor의 속성 설명자가 포함된 사전을 가져옵니다. 수정은 다음 논리를 사용하여 구현됩니다.
수정 | 구현 |
---|---|
제거 | 사전에서 해당 항목을 삭제합니다. |
더하기 | 사전에 적절한 항목을 추가합니다. |
변경 | 기존 속성 설명자 메서드를 호출하거나, 연결된 속성 설명자 항목을 바꾸거나, 사전의 전체 속성 키/값 쌍을 바꿉니다. |
의 FilterProperties 반환 값은 이 속성 집합이 고정되어 있는지 여부를 결정합니다. 이 메서드가 를 TypeDescriptor 반환true
하는 경우 이 구성 요소의 가 결과를 캐시할 수 있습니다. 이 캐시는 구성 요소가 가비지 수집되거나 형식 설명자의 메서드가 Refresh 호출될 때까지 유지 관리됩니다.
구현자 참고
에 의해 TypeDescriptor노출되는 멤버 설명자를 필터링하려면 구성 요소에서 이 인터페이스를 구현하고 이 클래스의 , FilterEvents(IComponent, IDictionary)또는 FilterProperties(IComponent, IDictionary) 메서드를 재정FilterAttributes(IComponent, IDictionary)의하여 특성, 이벤트 또는 속성을 각각 필터링합니다.
메서드
FilterAttributes(IComponent, IDictionary) |
구성 요소가 TypeDescriptor를 통해 노출한 특성을 필터링합니다. |
FilterEvents(IComponent, IDictionary) |
구성 요소가 TypeDescriptor를 통해 노출한 이벤트를 필터링합니다. |
FilterProperties(IComponent, IDictionary) |
구성 요소가 TypeDescriptor를 통해 노출한 속성을 필터링합니다. |
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