AccessibleObject AccessibleObject AccessibleObject AccessibleObject Class

定義

障碍を持つユーザーに合わせてアプリケーションのユーザー インターフェイス (UI) を調整するため、ユーザー補助対応アプリケーションで使用される情報を提供します。Provides information that accessibility applications use to adjust an application's user interface (UI) for users with impairments.

public ref class AccessibleObject : System::Runtime::InteropServices::StandardOleMarshalObject, Accessibility::IAccessible, System::Reflection::IReflect
[System.Runtime.InteropServices.ComVisible(true)]
public class AccessibleObject : System.Runtime.InteropServices.StandardOleMarshalObject, Accessibility.IAccessible, System.Reflection.IReflect
type AccessibleObject = class
    inherit StandardOleMarshalObject
    interface IReflect
    interface IAccessible
Public Class AccessibleObject
Inherits StandardOleMarshalObject
Implements IAccessible, IReflect
継承
AccessibleObjectAccessibleObjectAccessibleObjectAccessibleObject
派生
属性
実装

ユーザー補助対応のグラフの作成を次のコード例に示しますを使用して、制御、AccessibleObjectControl.ControlAccessibleObjectアクセス可能な情報を公開するクラス。The following code example demonstrates the creation of an accessibility-aware chart control, using the AccessibleObject and Control.ControlAccessibleObject classes to expose accessible information. コントロールは、凡例と共に 2 つの曲線をプロットします。The control plots two curves along with a legend. ChartControlAccessibleObjectから派生したクラスControlAccessibleObjectで使用されて、CreateAccessibilityInstanceグラフ コントロールのカスタムのアクセス可能な情報を提供するメソッド。The ChartControlAccessibleObject class, which derives from ControlAccessibleObject, is used in the CreateAccessibilityInstance method to provide custom accessible information for the chart control. グラフの凡例の実績がないためControl-ベースの制御が描画される代わりに、組み込みのアクセス可能な情報がない、グラフ コントロールでします。Because the chart legend is not an actual Control -based control, but instead is drawn by the chart control, it does not have any built-in accessible information. このため、ChartControlAccessibleObjectオーバーライド、GetChildを返すメソッドをCurveLegendAccessibleObject凡例の各部分にアクセスできる情報を表します。Because of this, the ChartControlAccessibleObject class overrides the GetChild method to return the CurveLegendAccessibleObject that represents accessible information for each part of the legend. ユーザー補助対応アプリケーションでは、このコントロールを使用すると、コントロールは、アクセスに必要な情報を提供できます。When an accessible-aware application uses this control, the control can provide the necessary accessible information.

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

using namespace System;
using namespace System::Drawing;
using namespace System::Windows::Forms;

// Declare a chart control that demonstrates accessibility in Windows Forms.
public ref class ChartControl: public System::Windows::Forms::UserControl
{
public:
   ref class ChartControlAccessibleObject;

   // forward declaration
   // Inner Class that represents a legend for a curve in the chart.
   ref class CurveLegend
   {

      // Inner class CurveLegendAccessibleObject represents accessible information
      // associated with the CurveLegend object.
   public:
      ref class CurveLegendAccessibleObject: public AccessibleObject
      {
      private:
         CurveLegend^ curveLegend;

      public:
         CurveLegendAccessibleObject( CurveLegend^ curveLegend )
            : AccessibleObject()
         {
            this->curveLegend = curveLegend;
         }


      private:

         property ChartControlAccessibleObject^ ChartControl 
         {

            // Private property that helps get the reference to the parent ChartControl.
            ChartControlAccessibleObject^ get()
            {
               return dynamic_cast<ChartControlAccessibleObject^>(Parent);
            }

         }

      internal:

         property int ID 
         {

            // Internal helper function that returns the ID for this CurveLegend.
            int get()
            {
               for ( int i = 0; i < ChartControl->GetChildCount(); i++ )
               {
                  if ( ChartControl->GetChild( i ) == this )
                  {
                     return i;
                  }

               }
               return  -1;
            }

         }

      public:

         property Rectangle Bounds 
         {

            // Gets the Bounds for the CurveLegend. This is used by accessibility programs.
            virtual Rectangle get() override
            {
               
               // The bounds is in screen coordinates.
               Point loc = curveLegend->Location;
               return Rectangle(curveLegend->chart->PointToScreen( loc ),curveLegend->Size);
            }

         }

         property String^ Name 
         {

            // Gets or sets the Name for the CurveLegend. This is used by accessibility programs.
            virtual String^ get() override
            {
               return curveLegend->Name;
            }

            virtual void set( String^ value ) override
            {
               curveLegend->Name = value;
            }

         }

         property AccessibleObject^ Parent 
         {

            // Gets the Curve Legend Parent's Accessible object.
            // This is used by accessibility programs.
            virtual AccessibleObject^ get() override
            {
               return curveLegend->chart->AccessibilityObject;
            }

         }

         property System::Windows::Forms::AccessibleRole Role 
         {

            // Gets the role for the CurveLegend. This is used by accessibility programs.
            virtual System::Windows::Forms::AccessibleRole get() override
            {
               return ::AccessibleRole::StaticText;
            }

         }

         property AccessibleStates State 
         {

            // Gets the state based on the selection for the CurveLegend.
            // This is used by accessibility programs.
            virtual AccessibleStates get() override
            {
               AccessibleStates state = AccessibleStates::Selectable;
               if ( curveLegend->Selected )
               {
                  state = static_cast<AccessibleStates>(state | AccessibleStates::Selected);
               }

               return state;
            }

         }

         // Navigates through siblings of this CurveLegend. This is used by accessibility programs.
         virtual AccessibleObject^ Navigate( AccessibleNavigation navdir ) override
         {
            
            // Uses the internal NavigateFromChild helper function that exists
            // on ChartControlAccessibleObject.
            return ChartControl->NavigateFromChild( this, navdir );
         }


         // Selects or unselects this CurveLegend. This is used by accessibility programs.
         virtual void Select( AccessibleSelection selection ) override
         {
            
            // Uses the internal SelectChild helper function that exists
            // on ChartControlAccessibleObject.
            ChartControl->SelectChild( this, selection );
         }

      };


   private:

      // class CurveLgendAccessibleObject
      String^ name;
      ChartControl^ chart;
      CurveLegendAccessibleObject^ accObj;
      bool selected;
      Point location;

   public:
      CurveLegend( ChartControl^ chart, String^ name )
      {
         this->chart = chart;
         this->name = name;
         selected = true;
      }


      property AccessibleObject^ AccessibilityObject 
      {

         // Gets the accessibility object for the curve legend.
         AccessibleObject^ get()
         {
            if ( accObj == nullptr )
            {
               accObj = gcnew CurveLegendAccessibleObject( this );
            }

            return accObj;
         }

      }

      property Rectangle Bounds 
      {

         // Gets the bounds for the curve legend.
         Rectangle get()
         {
            return Rectangle(Location,Size);
         }

      }

      property Point Location 
      {

         // Gets or sets the location for the curve legend.
         Point get()
         {
            return location;
         }

         void set( Point value )
         {
            location = value;
            chart->Invalidate();
            
            // Notifies the chart of the location change. This is used for
            // the accessibility information. AccessibleEvents::LocationChange
            // tells the chart the reason for the notification.
            chart->AccessibilityNotifyClients( AccessibleEvents::LocationChange, (dynamic_cast<CurveLegendAccessibleObject^>(AccessibilityObject))->ID );
         }

      }

      property String^ Name 
      {

         // Gets or sets the Name for the curve legend.
         String^ get()
         {
            return name;
         }

         void set( String^ value )
         {
            if ( name != value )
            {
               name = value;
               chart->Invalidate();
               
               // Notifies the chart of the name change. This is used for
               // the accessibility information. AccessibleEvents::NameChange
               // tells the chart the reason for the notification.
               chart->AccessibilityNotifyClients( AccessibleEvents::NameChange, (dynamic_cast<CurveLegendAccessibleObject^>(AccessibilityObject))->ID );
            }
         }

      }

      property bool Selected 
      {

         // Gets or sets the Selected state for the curve legend.
         bool get()
         {
            return selected;
         }

         void set( bool value )
         {
            if ( selected != value )
            {
               selected = value;
               chart->Invalidate();
               
               // Notifies the chart of the selection value change. This is used for
               // the accessibility information. The AccessibleEvents value depends upon
               // if the selection is true (AccessibleEvents::SelectionAdd) or
               // false (AccessibleEvents::SelectionRemove).
               chart->AccessibilityNotifyClients( selected ? AccessibleEvents::SelectionAdd : AccessibleEvents::SelectionRemove, (dynamic_cast<CurveLegendAccessibleObject^>(AccessibilityObject))->ID );
            }
         }

      }

      property System::Drawing::Size Size 
      {

         // Gets the Size for the curve legend.
         System::Drawing::Size get()
         {
            int legendHeight = chart->Font->Height + 4;
            Graphics^ g = chart->CreateGraphics();
            int legendWidth = (int)g->MeasureString( Name, chart->Font ).Width + 4;
            return System::Drawing::Size( legendWidth, legendHeight );
         }

      }

   };


private:

   // class CurveLegend
   CurveLegend^ legend1;
   CurveLegend^ legend2;

public:
   ChartControl()
   {
      
      // The ChartControl draws the chart in the OnPaint .
      SetStyle( ControlStyles::ResizeRedraw, true );
      SetStyle( ControlStyles::DoubleBuffer, true );
      SetStyle( ControlStyles::AllPaintingInWmPaint, true );
      this->BackColor = System::Drawing::Color::White;
      this->Name = "ChartControl";
      this->Click += gcnew System::EventHandler( this, &ChartControl::ChartControl_Click );
      this->QueryAccessibilityHelp += gcnew System::Windows::Forms::QueryAccessibilityHelpEventHandler( this, &ChartControl::ChartControl_QueryAccessibilityHelp );
      
      // The CurveLengend is not Control-based, it just
      // represents the parts of the legend.
      legend1 = gcnew CurveLegend( this,"A" );
      legend1->Location = Point(20,30);
      legend2 = gcnew CurveLegend( this,"B" );
      legend2->Location = Point(20,50);
   }



protected:
   // Overridden to return the custom AccessibleObject
   // for the entire chart.
   virtual AccessibleObject^ CreateAccessibilityInstance() override
   {
      return gcnew ChartControlAccessibleObject( this );
   }

   virtual void OnPaint( PaintEventArgs^ e ) override
   {
      
      // The ChartControl draws the chart in the OnPaint .
      System::Windows::Forms::UserControl::OnPaint( e );
      Rectangle bounds = this->ClientRectangle;
      int border = 5;
      
      // Draws the legends first.
      StringFormat^ format = gcnew StringFormat;
      format->Alignment = StringAlignment::Center;
      format->LineAlignment = StringAlignment::Center;
      if ( legend1 != nullptr )
      {
         if ( legend1->Selected )
         {
            e->Graphics->FillRectangle( gcnew SolidBrush( Color::Blue ), legend1->Bounds );
         }
         else
         {
            e->Graphics->DrawRectangle( Pens::Blue, legend1->Bounds );
         }

         e->Graphics->DrawString( legend1->Name, this->Font, Brushes::Black, legend1->Bounds, format );
      }

      if ( legend2 != nullptr )
      {
         if ( legend2->Selected )
         {
            e->Graphics->FillRectangle( gcnew SolidBrush( Color::Red ), legend2->Bounds );
         }
         else
         {
            e->Graphics->DrawRectangle( Pens::Red, legend2->Bounds );
         }

         e->Graphics->DrawString( legend2->Name, this->Font, Brushes::Black, legend2->Bounds, format );
      }

      
      // Charts out the actual curves that represent data in the Chart.
      bounds.Inflate(  -border,  -border );
      array<Point>^ temp1 = {Point(bounds.Left,bounds.Bottom),Point(bounds.Left + bounds.Width / 3,bounds.Top + bounds.Height / 5),Point(bounds.Right - bounds.Width / 3,(bounds.Top + bounds.Bottom) / 2),Point(bounds.Right,bounds.Top)};
      array<Point>^curve1 = temp1;
      array<Point>^ temp2 = {Point(bounds.Left,bounds.Bottom - bounds.Height / 3),Point(bounds.Left + bounds.Width / 3,bounds.Top + bounds.Height / 5),Point(bounds.Right - bounds.Width / 3,(bounds.Top + bounds.Bottom) / 2),Point(bounds.Right,bounds.Top + bounds.Height / 2)};
      array<Point>^curve2 = temp2;
      
      // Draws the actual curve only if it is selected.
      if ( legend1->Selected )
            e->Graphics->DrawCurve( Pens::Blue, curve1 );

      if ( legend2->Selected )
            e->Graphics->DrawCurve( Pens::Red, curve2 );

      e->Graphics->DrawRectangle( Pens::Blue, bounds );
   }

   // Handles the QueryAccessibilityHelp event.
   void ChartControl_QueryAccessibilityHelp( Object^ /*sender*/, System::Windows::Forms::QueryAccessibilityHelpEventArgs^ e )
   {
      e->HelpString = "Displays chart data";
   }

   // Handles the Click event for the chart.
   // Toggles the selection of whatever legend was clicked on
   void ChartControl_Click( Object^ /*sender*/, System::EventArgs^ /*e*/ )
   {
      Point pt = this->PointToClient( Control::MousePosition );
      if ( legend1->Bounds.Contains( pt ) )
      {
         legend1->Selected =  !legend1->Selected;
      }
      else
      if ( legend2->Bounds.Contains( pt ) )
      {
         legend2->Selected =  !legend2->Selected;
      }
   }


public:

   property array<CurveLegend^>^ Legends 
   {

      // Gets an array of CurveLengends used in the Chart.
      array<CurveLegend^>^ get()
      {
         array<CurveLegend^>^temp3 = {legend1,legend2};
         return temp3;
      }

   }

   // Inner class ChartControlAccessibleObject represents accessible information associated with the ChartControl.
   // The ChartControlAccessibleObject is returned in the ChartControl::CreateAccessibilityInstance .
   ref class ChartControlAccessibleObject: public ControlAccessibleObject
   {
   private:
      ChartControl^ chartControl;

   public:
      ChartControlAccessibleObject( ChartControl^ ctrl )
         : ControlAccessibleObject( ctrl )
      {
         chartControl = ctrl;
      }


      property System::Windows::Forms::AccessibleRole Role 
      {

         // Gets the role for the Chart. This is used by accessibility programs.
         virtual System::Windows::Forms::AccessibleRole get() override
         {
            return ::AccessibleRole::Chart;
         }

      }

      property AccessibleStates State 
      {

         // Gets the state for the Chart. This is used by accessibility programs.
         virtual AccessibleStates get() override
         {
            return AccessibleStates::ReadOnly;
         }

      }

      // The CurveLegend objects are "child" controls in terms of accessibility so
      // return the number of ChartLengend objects.
      virtual int GetChildCount() override
      {
         return chartControl->Legends->Length;
      }


      // Gets the Accessibility object of the child CurveLegend idetified by index.
      virtual AccessibleObject^ GetChild( int index ) override
      {
         if ( index >= 0 && index < chartControl->Legends->Length )
         {
            return chartControl->Legends[ index ]->AccessibilityObject;
         }

         return nullptr;
      }


   internal:

      // Helper function that is used by the CurveLegend's accessibility object
      // to navigate between sibiling controls. Specifically, this function is used in
      // the CurveLegend::CurveLegendAccessibleObject.Navigate function.
      AccessibleObject^ NavigateFromChild( CurveLegend::CurveLegendAccessibleObject^ child, AccessibleNavigation navdir )
      {
         switch ( navdir )
         {
            case AccessibleNavigation::Down:
            case AccessibleNavigation::Next:
               return GetChild( child->ID + 1 );

            case AccessibleNavigation::Up:
            case AccessibleNavigation::Previous:
               return GetChild( child->ID - 1 );
         }
         return nullptr;
      }


      // Helper function that is used by the CurveLegend's accessibility object
      // to select a specific CurveLegend control. Specifically, this function is used
      // in the CurveLegend::CurveLegendAccessibleObject.Select function.
      void SelectChild( CurveLegend::CurveLegendAccessibleObject^ child, AccessibleSelection selection )
      {
         int childID = child->ID;
         
         // Determine which selection action should occur, based on the
         // AccessibleSelection value.
         if ( (selection & AccessibleSelection::TakeSelection) != (AccessibleSelection)0 )
         {
            for ( int i = 0; i < chartControl->Legends->Length; i++ )
            {
               if ( i == childID )
               {
                  chartControl->Legends[ i ]->Selected = true;
               }
               else
               {
                  chartControl->Legends[ i ]->Selected = false;
               }

            }
            
            // AccessibleSelection->AddSelection means that the CurveLegend will be selected.
            if ( (selection & AccessibleSelection::AddSelection) != (AccessibleSelection)0 )
            {
               chartControl->Legends[ childID ]->Selected = true;
            }
            
            // AccessibleSelection->AddSelection means that the CurveLegend will be unselected.
            if ( (selection & AccessibleSelection::RemoveSelection) != (AccessibleSelection)0 )
            {
               chartControl->Legends[ childID ]->Selected = false;
            }
         }
      }

   };

   // class ChartControlAccessibleObject
};


// class ChartControl
public ref class Form1: public System::Windows::Forms::Form
{
private:

   // Test out the Chart Control.
   ChartControl^ chart1;

public:
   Form1()
   {
      
      // Create a chart control and add it to the form.
      this->chart1 = gcnew ChartControl;
      this->ClientSize = System::Drawing::Size( 920, 566 );
      this->chart1->Location = System::Drawing::Point( 47, 16 );
      this->chart1->Size = System::Drawing::Size( 600, 400 );
      this->Controls->Add( this->chart1 );
   }

};


// class Form1

[STAThread]
int main()
{
   Application::Run( gcnew Form1 );
}

using System;
using System.Drawing;
using System.Windows.Forms;

namespace ChartControl
{
    public class Form1 : System.Windows.Forms.Form
    {
        // Test out the Chart Control.
        private ChartControl chart1;

        [STAThread]
        static void Main() 
        {
            Application.Run(new Form1());
        }

        public Form1() {
            // Create a chart control and add it to the form.
            this.chart1 = new ChartControl();
            this.ClientSize = new System.Drawing.Size(920, 566);

            this.chart1.Location = new System.Drawing.Point(47, 16);
            this.chart1.Size = new System.Drawing.Size(600, 400);

            this.Controls.Add(this.chart1);
        }
    }

    // Declare a chart control that demonstrates accessibility in Windows Forms.
    public class ChartControl : System.Windows.Forms.UserControl
    {
        private CurveLegend legend1;
        private CurveLegend legend2; 

        public ChartControl()
        {
            // The ChartControl draws the chart in the OnPaint override.
            SetStyle(ControlStyles.ResizeRedraw, true);
            SetStyle(ControlStyles.DoubleBuffer, true);
            SetStyle(ControlStyles.AllPaintingInWmPaint, true);

            this.BackColor = System.Drawing.Color.White;
            this.Name = "ChartControl";

            this.Click += new System.EventHandler(this.ChartControl_Click);
            this.QueryAccessibilityHelp += 
                new System.Windows.Forms.QueryAccessibilityHelpEventHandler(
                                        this.ChartControl_QueryAccessibilityHelp);

            // The CurveLengend is not Control-based, it just
            // represents the parts of the legend.
            legend1 = new CurveLegend(this, "A");
            legend1.Location = new Point(20, 30);
            legend2 = new CurveLegend(this, "B");        
            legend2.Location = new Point(20, 50);
        }

        // Overridden to return the custom AccessibleObject 
        // for the entire chart.
        protected override AccessibleObject CreateAccessibilityInstance() 
        {            
            return new ChartControlAccessibleObject(this);
        }

        protected override void OnPaint(PaintEventArgs e) 
        {
            // The ChartControl draws the chart in the OnPaint override.
            base.OnPaint(e);

            Rectangle bounds = this.ClientRectangle;
            int border = 5;

            // Draws the legends first.
            StringFormat format = new StringFormat();
            format.Alignment = StringAlignment.Center;
            format.LineAlignment = StringAlignment.Center;
            
            if (legend1 != null) {
                if (legend1.Selected) {
                    e.Graphics.FillRectangle(new SolidBrush(Color.Blue), legend1.Bounds);
                } else {
                    e.Graphics.DrawRectangle(Pens.Blue, legend1.Bounds);
                }

                e.Graphics.DrawString(legend1.Name, this.Font, Brushes.Black, legend1.Bounds, format);                
            }
            if (legend2 != null) {
                if (legend2.Selected) {
                    e.Graphics.FillRectangle(new SolidBrush(Color.Red), legend2.Bounds);
                } else {
                    e.Graphics.DrawRectangle(Pens.Red, legend2.Bounds);
                }
                e.Graphics.DrawString(legend2.Name, this.Font, Brushes.Black, legend2.Bounds, format);
            }            

            // Charts out the actual curves that represent data in the Chart.
            bounds.Inflate(-border, -border);
            Point[] curve1 = new Point[] {new Point(bounds.Left, bounds.Bottom),
                            new Point(bounds.Left + bounds.Width / 3, bounds.Top + bounds.Height / 5),
                            new Point(bounds.Right - bounds.Width / 3, (bounds.Top + bounds.Bottom) / 2),
                            new Point(bounds.Right, bounds.Top)};

            Point[] curve2 = new Point[] {new Point(bounds.Left, bounds.Bottom - bounds.Height / 3),
                            new Point(bounds.Left + bounds.Width / 3, bounds.Top + bounds.Height / 5),
                            new Point(bounds.Right - bounds.Width / 3, (bounds.Top + bounds.Bottom) / 2),
                            new Point(bounds.Right, bounds.Top + bounds.Height / 2)};

            // Draws the actual curve only if it is selected.
            if (legend1.Selected) e.Graphics.DrawCurve(Pens.Blue, curve1);
            if (legend2.Selected) e.Graphics.DrawCurve(Pens.Red, curve2);

            e.Graphics.DrawRectangle(Pens.Blue, bounds);            
        }

        // Handles the QueryAccessibilityHelp event.
        private void ChartControl_QueryAccessibilityHelp(object sender, 
                                    System.Windows.Forms.QueryAccessibilityHelpEventArgs e)
        {            
            e.HelpString = "Displays chart data";
        }          

        // Handles the Click event for the chart. 
        // Toggles the selection of whatever legend was clicked on
        private void ChartControl_Click(object sender, System.EventArgs e)
        {
            Point pt = this.PointToClient(Control.MousePosition);
            if (legend1.Bounds.Contains(pt)) {
                legend1.Selected = !legend1.Selected;

            } else if (legend2.Bounds.Contains(pt)) {
                legend2.Selected = !legend2.Selected;
            }
        }

        // Gets an array of CurveLengends used in the Chart.
        public CurveLegend[] Legends
        {   
            get {                
                return new CurveLegend[] { legend1, legend2 };
            }            
        }                

        // Inner class ChartControlAccessibleObject represents accessible information associated with the ChartControl.
        // The ChartControlAccessibleObject is returned in the ChartControl.CreateAccessibilityInstance override.
        public class ChartControlAccessibleObject : ControlAccessibleObject
        {
            ChartControl chartControl;

            public ChartControlAccessibleObject(ChartControl ctrl) : base(ctrl) 
            {
                chartControl = ctrl;
            }

            // Gets the role for the Chart. This is used by accessibility programs.
            public override AccessibleRole Role
            {  
                get {
                    return AccessibleRole.Chart;
                }
            }

            // Gets the state for the Chart. This is used by accessibility programs.
            public override AccessibleStates State
            {  
                get {                    
                    return AccessibleStates.ReadOnly;
                }
            }

            // The CurveLegend objects are "child" controls in terms of accessibility so 
            // return the number of ChartLengend objects.
            public override int GetChildCount()
            {  
                return chartControl.Legends.Length;
            }

            // Gets the Accessibility object of the child CurveLegend idetified by index.
            public override AccessibleObject GetChild(int index)
            {  
                if (index >= 0 && index < chartControl.Legends.Length) {
                    return chartControl.Legends[index].AccessibilityObject;
                }                
                return null;
            }

            // Helper function that is used by the CurveLegend's accessibility object
            // to navigate between sibiling controls. Specifically, this function is used in
            // the CurveLegend.CurveLegendAccessibleObject.Navigate function.
            internal AccessibleObject NavigateFromChild(CurveLegend.CurveLegendAccessibleObject child, 
                                                        AccessibleNavigation navdir) 
            {  
                switch(navdir) {
                    case AccessibleNavigation.Down:
                    case AccessibleNavigation.Next:
                        return GetChild(child.ID + 1);
                        
                    case AccessibleNavigation.Up:
                    case AccessibleNavigation.Previous:
                        return GetChild(child.ID - 1);                        
                }
                return null;
            }

            // Helper function that is used by the CurveLegend's accessibility object
            // to select a specific CurveLegend control. Specifically, this function is used
            // in the CurveLegend.CurveLegendAccessibleObject.Select function.
            internal void SelectChild(CurveLegend.CurveLegendAccessibleObject child, AccessibleSelection selection) 
            {   
                int childID = child.ID;

                // Determine which selection action should occur, based on the
                // AccessibleSelection value.
                if ((selection & AccessibleSelection.TakeSelection) != 0) {
                    for(int i = 0; i < chartControl.Legends.Length; i++) {
                        if (i == childID) {
                            chartControl.Legends[i].Selected = true;                        
                        } else {
                            chartControl.Legends[i].Selected = false;
                        }
                    }

                    // AccessibleSelection.AddSelection means that the CurveLegend will be selected.
                    if ((selection & AccessibleSelection.AddSelection) != 0) {
                        chartControl.Legends[childID].Selected = true;                        
                    }

                    // AccessibleSelection.AddSelection means that the CurveLegend will be unselected.
                    if ((selection & AccessibleSelection.RemoveSelection) != 0) {
                        chartControl.Legends[childID].Selected = false;                        
                    }
                }            
            }
        }

        // Inner Class that represents a legend for a curve in the chart.
        public class CurveLegend 
        {
            private string name;
            private ChartControl chart;
            private CurveLegendAccessibleObject accObj;
            private bool selected = true;
            private Point location;

            public CurveLegend(ChartControl chart, string name) 
            {
                this.chart = chart;
                this.name = name;
            }

            // Gets the accessibility object for the curve legend.
            public AccessibleObject AccessibilityObject
            {
                get {
                    if (accObj == null) {
                        accObj = new CurveLegendAccessibleObject(this);
                    }
                    return accObj;
                }
            }
            
            // Gets the bounds for the curve legend.
            public Rectangle Bounds
            {   
                get {
                    return new Rectangle(Location, Size);
                }
            }

            // Gets or sets the location for the curve legend.
            public Point Location
            {   
                get {
                    return location;
                }
                set {
                    location = value;
                    chart.Invalidate();

                    // Notifies the chart of the location change. This is used for
                    // the accessibility information. AccessibleEvents.LocationChange
                    // tells the chart the reason for the notification.

                    chart.AccessibilityNotifyClients(AccessibleEvents.LocationChange, 
                        ((CurveLegendAccessibleObject)AccessibilityObject).ID);
                }
            }            
        
            // Gets or sets the Name for the curve legend.
            public string Name
            {   
                get {
                    return name;
                }
                set {
                    if (name != value) 
                    {
                        name = value;
                        chart.Invalidate();

                        // Notifies the chart of the name change. This is used for
                        // the accessibility information. AccessibleEvents.NameChange
                        // tells the chart the reason for the notification.

                        chart.AccessibilityNotifyClients(AccessibleEvents.NameChange, 
                            ((CurveLegendAccessibleObject)AccessibilityObject).ID);
                    }
                }
            }

            // Gets or sets the Selected state for the curve legend.
            public bool Selected
            {   
                get {
                    return selected;
                }
                set {
                    if (selected != value) 
                    {
                        selected = value;
                        chart.Invalidate();

                        // Notifies the chart of the selection value change. This is used for
                        // the accessibility information. The AccessibleEvents value depends upon
                        // if the selection is true (AccessibleEvents.SelectionAdd) or 
                        // false (AccessibleEvents.SelectionRemove).
                        chart.AccessibilityNotifyClients(
                            selected ? AccessibleEvents.SelectionAdd : AccessibleEvents.SelectionRemove, 
                            ((CurveLegendAccessibleObject)AccessibilityObject).ID);
                    }
                }
            }

            // Gets the Size for the curve legend.
            public Size Size
            {   
                get {                    
                    int legendHeight = chart.Font.Height + 4;
                    Graphics g = chart.CreateGraphics();
                    int legendWidth = (int)g.MeasureString(Name, chart.Font).Width + 4;            

                    return new Size(legendWidth, legendHeight);
                }
            }
    
            // Inner class CurveLegendAccessibleObject represents accessible information 
            // associated with the CurveLegend object.
            public class CurveLegendAccessibleObject : AccessibleObject
            {
                private CurveLegend curveLegend;

                public CurveLegendAccessibleObject(CurveLegend curveLegend) : base() 
                {
                    this.curveLegend = curveLegend;                    
                }                

                // Private property that helps get the reference to the parent ChartControl.
                private ChartControlAccessibleObject ChartControl
                {   
                    get {
                        return Parent as ChartControlAccessibleObject;
                    }
                }

                // Internal helper function that returns the ID for this CurveLegend.
                internal int ID
                {
                    get {
                        for(int i = 0; i < ChartControl.GetChildCount(); i++) {
                            if (ChartControl.GetChild(i) == this) {
                                return i;
                            }
                        }
                        return -1;
                    }
                }

                // Gets the Bounds for the CurveLegend. This is used by accessibility programs.
                public override Rectangle Bounds
                {
                    get {                        
                        // The bounds is in screen coordinates.
                        Point loc = curveLegend.Location;
                        return new Rectangle(curveLegend.chart.PointToScreen(loc), curveLegend.Size);
                    }
                }

                // Gets or sets the Name for the CurveLegend. This is used by accessibility programs.
                public override string Name
                {
                    get {
                        return curveLegend.Name;
                    }
                    set {
                        curveLegend.Name = value;                        
                    }
                }

                // Gets the Curve Legend Parent's Accessible object.
                // This is used by accessibility programs.
                public override AccessibleObject Parent
                {
                    get {
                        return curveLegend.chart.AccessibilityObject;
                    }
                }

                // Gets the role for the CurveLegend. This is used by accessibility programs.
                public override AccessibleRole Role 
                {
                    get {
                        return AccessibleRole.StaticText;
                    }
                }

                // Gets the state based on the selection for the CurveLegend. 
                // This is used by accessibility programs.
                public override AccessibleStates State 
                {
                    get {
                        AccessibleStates state = AccessibleStates.Selectable;
                        if (curveLegend.Selected) 
                        {
                            state |= AccessibleStates.Selected;
                        }
                        return state;
                    }
                }

                // Navigates through siblings of this CurveLegend. This is used by accessibility programs.
                public override AccessibleObject Navigate(AccessibleNavigation navdir) 
                {
                    // Uses the internal NavigateFromChild helper function that exists
                    // on ChartControlAccessibleObject.
                    return ChartControl.NavigateFromChild(this, navdir);
                }

                // Selects or unselects this CurveLegend. This is used by accessibility programs.
                public override void Select(AccessibleSelection selection) 
                {
                    // Uses the internal SelectChild helper function that exists
                    // on ChartControlAccessibleObject.
                    ChartControl.SelectChild(this, selection);
                }
            }
        }
    }
}
Option Explicit

Imports System
Imports System.Drawing
Imports System.Windows.Forms

Namespace ChartControlNameSpace
    
    Public Class Form1 
        Inherits System.Windows.Forms.Form

        ' Test out the Chart Control.
        Private chart1 As ChartControl

        <System.STAThread()> _
        Public Shared Sub Main()
            System.Windows.Forms.Application.Run(New Form1())
        End Sub 'Main

        Public Sub New() 
            ' Create a chart control and add it to the form.
            Me.chart1 = New ChartControl()
            Me.ClientSize = New System.Drawing.Size(920, 566)

            Me.chart1.Location = New System.Drawing.Point(47, 16)
            Me.chart1.Size = New System.Drawing.Size(600, 400)

            Me.Controls.Add(Me.chart1)
        End Sub
    End Class

    ' Declares a chart control that demonstrates Accessibility in Windows Forms.
    Public Class ChartControl
        Inherits System.Windows.Forms.UserControl

        Private legend1 As CurveLegend
        Private legend2 As CurveLegend
        
        Public Sub New()
            ' The ChartControl draws the chart in the OnPaint override.
            SetStyle(ControlStyles.ResizeRedraw, True)
            SetStyle(ControlStyles.DoubleBuffer, True)
            SetStyle(ControlStyles.AllPaintingInWmPaint, True)
            
            Me.BackColor = System.Drawing.Color.White
            Me.Name = "ChartControl"

            ' The CurveLengend is not Control-based, it just
            ' represent the parts of the legend.
            legend1 = New CurveLegend(Me, "A")
            legend1.Location = New Point(20, 30)
            legend2 = New CurveLegend(Me, "B")
            legend2.Location = New Point(20, 50)
        End Sub 'New
              
        ' Overridden to return the custom AccessibleObject 
        ' for the entire chart.
        Protected Overrides Function CreateAccessibilityInstance() As AccessibleObject
            Return New ChartControlAccessibleObject(Me)
        End Function 

        Protected Overrides Sub OnPaint(e As PaintEventArgs)
            ' The ChartControl draws the chart in the OnPaint override.
            MyBase.OnPaint(e)
            
            Dim bounds As Rectangle = Me.ClientRectangle
            Dim border As Integer = 5
            
            ' Draw the legends first.
            Dim format As New StringFormat()
            format.Alignment = StringAlignment.Center
            format.LineAlignment = StringAlignment.Center
            
            If (legend1 IsNot Nothing) Then
                If legend1.Selected Then
                    e.Graphics.FillRectangle(New SolidBrush(Color.Blue), legend1.Bounds)
                Else
                    e.Graphics.DrawRectangle(Pens.Blue, legend1.Bounds)
                End If
                e.Graphics.DrawString(legend1.Name, Me.Font, Brushes.Black, RectangleF.op_Implicit(legend1.Bounds), format)
            End If
            If (legend2 IsNot Nothing) Then
                If legend2.Selected Then
                    e.Graphics.FillRectangle(New SolidBrush(Color.Red), legend2.Bounds)
                Else
                    e.Graphics.DrawRectangle(Pens.Red, legend2.Bounds)
                End If
                e.Graphics.DrawString(legend2.Name, Me.Font, Brushes.Black, RectangleF.op_Implicit(legend2.Bounds), format)
            End If
            
            ' Chart out the actual curves that represent data in the Chart.
            bounds.Inflate(-border, -border)
            Dim curve1() As Point = {New Point(bounds.Left, bounds.Bottom), _
                                     New Point(bounds.Left + bounds.Width / 3, bounds.Top + bounds.Height / 5), _
                                     New Point(bounds.Right - bounds.Width / 3,(bounds.Top + bounds.Bottom) / 2), _
                                     New Point(bounds.Right, bounds.Top)}

            Dim curve2() As Point = {New Point(bounds.Left, bounds.Bottom - bounds.Height / 3), _
                                     New Point(bounds.Left + bounds.Width / 3, bounds.Top + bounds.Height / 5), _
                                     New Point(bounds.Right - bounds.Width / 3,(bounds.Top + bounds.Bottom) / 2), _
                                     New Point(bounds.Right, bounds.Top + bounds.Height / 2)}
            
            ' Draw the actual curve only if it is selected.
            If legend1.Selected Then
                e.Graphics.DrawCurve(Pens.Blue, curve1)
            End If
            If legend2.Selected Then
                e.Graphics.DrawCurve(Pens.Red, curve2)
            End If 
            e.Graphics.DrawRectangle(Pens.Blue, bounds)
        End Sub 'OnPaint
        
        ' Handle the QueryAccessibilityHelp event.
        Private Sub ChartControl_QueryAccessibilityHelp(sender As Object, _
                           e As System.Windows.Forms.QueryAccessibilityHelpEventArgs) Handles MyBase.QueryAccessibilityHelp
            e.HelpString = "Displays chart data"
        End Sub 

        ' Handle the Click event for the chart. 
        ' Toggle the selection of whatever legend was clicked.     
        Private Sub ChartControl_Click(sender As Object, e As System.EventArgs) Handles MyBase.Click

            Dim pt As Point = Me.PointToClient(Control.MousePosition)
            If legend1.Bounds.Contains(pt) Then
                legend1.Selected = Not legend1.Selected
            Else
                If legend2.Bounds.Contains(pt) Then
                    legend2.Selected = Not legend2.Selected
                End If
            End If
        End Sub 'ChartControl_Click

        ' Get an array of the CurveLengends used in the Chart.
        Public ReadOnly Property Legends() As CurveLegend()
            Get
                Return New CurveLegend() {legend1, legend2}
            End Get
        End Property
        
        Protected Sub ExposeAccessibilityNotifyClients(ByVal accEvent As AccessibleEvents, ByVal childID As Integer)
            AccessibilityNotifyClients(accEvent, childID) 
        End Sub

        ' Inner Class ChartControlAccessibleObject represents accessible information 
        ' associated with the ChartControl.
        ' The ChartControlAccessibleObject is returned in the         ' ChartControl.CreateAccessibilityInstance override.
        Public Class ChartControlAccessibleObject
            Inherits Control.ControlAccessibleObject

            Private chartControl As ChartControl
            
            Public Sub New(ctrl As ChartControl)
                MyBase.New(ctrl)
                chartControl = ctrl
            End Sub 'New
            
            ' Get the role for the Chart. This is used by accessibility programs.            
            Public Overrides ReadOnly Property Role() As AccessibleRole
                Get
                    Return System.Windows.Forms.AccessibleRole.Chart
                End Get
            End Property
            
            ' Get the state for the Chart. This is used by accessibility programs.            
            Public Overrides ReadOnly Property State() As AccessibleStates
                Get
                    Return AccessibleStates.ReadOnly
                End Get
            End Property                        
            
            ' The CurveLegend objects are "child" controls in terms of accessibility so 
            ' return the number of ChartLengend objects.            
            Public Overrides Function GetChildCount() As Integer
                Return chartControl.Legends.Length
            End Function 
            
            ' Get the Accessibility object of the child CurveLegend idetified by index.
            Public Overrides Function GetChild(index As Integer) As AccessibleObject
                If index >= 0 And index < chartControl.Legends.Length Then
                    Return chartControl.Legends(index).AccessibilityObject
                End If
                Return Nothing
            End Function 
            
            ' Helper function that is used by the CurveLegend's accessibility object
            ' to navigate between sibiling controls. Specifically, this function is used in
            ' the CurveLegend.CurveLegendAccessibleObject.Navigate function.
            Friend Function NavigateFromChild(child As CurveLegend.CurveLegendAccessibleObject, _
                                            navdir As AccessibleNavigation) As AccessibleObject
                Select Case navdir
                    Case AccessibleNavigation.Down, AccessibleNavigation.Next
                            Return GetChild(child.ID + 1)
                    
                    Case AccessibleNavigation.Up, AccessibleNavigation.Previous
                            Return GetChild(child.ID - 1)
                End Select
                Return Nothing
            End Function            

            ' Helper function that is used by the CurveLegend's accessibility object
            ' to select a specific CurveLegend control. Specifically, this function is used 
            ' in the CurveLegend.CurveLegendAccessibleObject.Select function.            
            Friend Sub SelectChild(child As CurveLegend.CurveLegendAccessibleObject, selection As AccessibleSelection)
                Dim childID As Integer = child.ID
                
                ' Determine which selection action should occur, based on the
                ' AccessibleSelection value.
                If (selection And AccessibleSelection.TakeSelection) <> 0 Then
                    Dim i As Integer
                    For i = 0 To chartControl.Legends.Length - 1
                        If i = childID Then
                            chartControl.Legends(i).Selected = True
                        Else
                            chartControl.Legends(i).Selected = False
                        End If
                    Next i
                    
                    ' AccessibleSelection.AddSelection means that the CurveLegend will be selected.
                    If (selection And AccessibleSelection.AddSelection) <> 0 Then
                        chartControl.Legends(childID).Selected = True
                    End If

                    ' AccessibleSelection.AddSelection means that the CurveLegend will be unselected.                    
                    If (selection And AccessibleSelection.RemoveSelection) <> 0 Then
                        chartControl.Legends(childID).Selected = False
                    End If
                End If
            End Sub 'SelectChild
        End Class 'ChartControlAccessibleObject

        ' Inner Class that represents a legend for a curve in the chart.
        Public Class CurveLegend
            Private m_name As String
            Private chart As ChartControl
            Private accObj As CurveLegendAccessibleObject
            Private m_selected As Boolean = True
            Private m_location As Point
            
            Public Sub New(chart As ChartControl, name As String)
                Me.chart = chart
                Me.m_name = name
            End Sub 'New

            ' Gets the accessibility object for the curve legend.            
            Public ReadOnly Property AccessibilityObject() As AccessibleObject
                Get
                    If accObj Is Nothing Then
                        accObj = New CurveLegendAccessibleObject(Me)
                    End If
                    Return accObj
                End Get
            End Property
            
            ' Gets the bounds for the curve legend.            
            Public ReadOnly Property Bounds() As Rectangle
                Get
                    Return New Rectangle(Location, Size)
                End Get
            End Property

            ' Gets or sets the location for the curve legend.            
            Public Property Location() As Point
                Get
                    Return m_location
                End Get
                Set
                    m_location = value
                    chart.Invalidate()

                    ' Notifies the chart of the location change. This is used for
                    ' the accessibility information. AccessibleEvents.LocationChange
                    ' tells the chart the reason for the notification.
                    chart.ExposeAccessibilityNotifyClients(AccessibleEvents.LocationChange, _
                            CType(AccessibilityObject, CurveLegendAccessibleObject).ID)
                End Set
            End Property
            
            ' Gets or sets the Name for the curve legend.            
            Public Property Name() As String
                Get
                    Return m_name
                End Get
                Set
                    If m_name <> value Then
                        m_name = value
                        chart.Invalidate()

                        ' Notifies the chart of the name change. This is used for
                        ' the accessibility information. AccessibleEvents.NameChange
                        ' tells the chart the reason for the notification. 
                        chart.ExposeAccessibilityNotifyClients(AccessibleEvents.NameChange, _
                                CType(AccessibilityObject, CurveLegendAccessibleObject).ID)
                    End If
                End Set
            End Property
            
            ' Gets or sets the Selected state for the curve legend.            
            Public Property Selected() As Boolean
                Get
                    Return m_selected
                End Get
                Set
                    If m_selected <> value Then
                        m_selected = value
                        chart.Invalidate()

                        ' Notifies the chart of the selection value change. This is used for
                        ' the accessibility information. The AccessibleEvents value varies
                        ' on whether the selection is true (AccessibleEvents.SelectionAdd) or 
                        ' false (AccessibleEvents.SelectionRemove). 
                        If m_selected Then
                            chart.ExposeAccessibilityNotifyClients(AccessibleEvents.SelectionAdd, _
                                    CType(AccessibilityObject, CurveLegendAccessibleObject).ID) 
                        Else
                            chart.ExposeAccessibilityNotifyClients(AccessibleEvents.SelectionRemove, _
                                    CType(AccessibilityObject, CurveLegendAccessibleObject).ID) 
                        End If
                    End If
                End Set
            End Property
            
            ' Gets the Size for the curve legend.            
            Public ReadOnly Property Size() As Size
                Get
                    Dim legendHeight As Integer = chart.Font.Height + 4
                    Dim g As Graphics = chart.CreateGraphics()
                    Dim legendWidth As Integer = CInt(g.MeasureString(Name, chart.Font).Width) + 4
                    
                    Return New Size(legendWidth, legendHeight)
                End Get
            End Property
            
            
            ' Inner class CurveLegendAccessibleObject represents accessible information 
            ' associated with the CurveLegend object.
            Public Class CurveLegendAccessibleObject
                Inherits AccessibleObject

                Private curveLegend As CurveLegend
                
                Public Sub New(curveLegend As CurveLegend)
                    Me.curveLegend = curveLegend
                End Sub 'New
                
                ' Private property that helps get the reference to the parent ChartControl.                
                Private ReadOnly Property ChartControl() As ChartControlAccessibleObject
                    Get
                        Return CType(Parent, ChartControlAccessibleObject)
                    End Get
                End Property

                ' Friend helper function that returns the ID for this CurveLegend.                
                Friend ReadOnly Property ID() As Integer
                    Get
                        Dim i As Integer
                        For i = 0 To (ChartControl.GetChildCount()) - 1
                            If ChartControl.GetChild(i) Is Me Then
                                Return i
                            End If
                        Next i
                        Return - 1
                    End Get
                End Property
                
                ' Gets the Bounds for the CurveLegend. This is used by accessibility programs.
                Public Overrides ReadOnly Property Bounds() As Rectangle
                    Get
                        ' The bounds is in screen coordinates.
                        Dim loc As Point = curveLegend.Location
                        Return New Rectangle(curveLegend.chart.PointToScreen(loc), curveLegend.Size)
                    End Get
                End Property

                ' Gets or sets the Name for the CurveLegend. This is used by accessibility programs.                
                Public Overrides Property Name() As String
                    Get
                        Return curveLegend.Name
                    End Get
                    Set
                        curveLegend.Name = value
                    End Set
                End Property
                
                ' Gets the Curve Legend Parent's Accessible object.
                ' This is used by accessibility programs.                
                Public Overrides ReadOnly Property Parent() As AccessibleObject
                    Get
                        Return curveLegend.chart.AccessibilityObject
                    End Get
                End Property
                
                ' Gets the role for the CurveLegend. This is used by accessibility programs.                
                Public Overrides ReadOnly Property Role() As AccessibleRole
                    Get
                        Return System.Windows.Forms.AccessibleRole.StaticText
                    End Get
                End Property

                ' Gets the state based on the selection for the CurveLegend. 
                ' This is used by accessibility programs.                
                Public Overrides ReadOnly Property State() As AccessibleStates
                    Get
                        Dim stateTemp As AccessibleStates = AccessibleStates.Selectable
                        If curveLegend.Selected Then
                            stateTemp = stateTemp Or AccessibleStates.Selected
                        End If
                        Return stateTemp
                    End Get
                End Property
                
                ' Navigates through siblings of this CurveLegend. This is used by accessibility programs.                
                Public Overrides Function Navigate(navdir As AccessibleNavigation) As AccessibleObject
                    ' Use the Friend NavigateFromChild helper function that exists
                    ' on ChartControlAccessibleObject.
                    Return ChartControl.NavigateFromChild(Me, navdir)
                End Function
                
                ' Selects or unselects this CurveLegend. This is used by accessibility programs.
                Public Overrides Sub [Select](selection As AccessibleSelection)

                    ' Use the internal SelectChild helper function that exists
                    ' on ChartControlAccessibleObject.
                    ChartControl.SelectChild(Me, selection)
                End Sub

            End Class 'CurveLegendAccessibleObject

        End Class 'CurveLegend

    End Class 'ChartControl

End Namespace 'ChartControlNameSpace

注釈

ユーザー補助アプリケーションには、障碍を持つユーザーの使いやすさを向上させるために、アプリケーションの機能を調整できます。Accessibility applications can adjust features of the application to improve usability for users with disabilities.

視覚障害のあるユーザーのニーズに準拠するソフトウェアとオペレーティング システムの機能を調整できます。For users who are visually impaired, you can adjust software and operating system features to comply with their needs. たとえば、テキストやイメージを拡大し、コントラストでレンダリングできます。For example, you can enlarge text and images and render them with a contrast. さらに、適切な色の使用量、色盲に対応できます。In addition, you can accommodate color-blindness with the appropriate use of colors. ユーザーが深刻な視覚的に障碍のある、コンピューターが画面のレビュー補助画面に表示される変換を使用してアクセスできるテキストを音声または動的に更新可能な点字表示にします。For users who are severely visually impaired, computers are accessible with screen review aids that translate on-screen text to speech or to a dynamic, refreshable, Braille display.

聴覚であるユーザー、点滅ツールバーなどの視覚的な手掛かりを使用するプログラムを設計することができます。または、テキストとして音声メッセージを表示することができます。For users who are hard of hearing, you can design programs that use visual cues, such as a flashing toolbar; or you can display spoken messages as text. たとえば、オンにすると、SoundSentry機能、コントロール パネルで、ユーザー補助のオプションが、システムでは、サウンドのアラームが、ときに、visual 警告を提供します。For example, when turned on, the SoundSentry feature, an accessibility option in Control Panel, provides a visual warning whenever the system makes an alarm sound.

モーション障碍を持つユーザーの場合にコンピューターのユーザー補助が向上を絞り込むか、キーボードとマウスの使用を排除するコントロール デザインできます。For users with motion disabilities, you can design controls that refine or eliminate keyboard and mouse use, thereby improving computer accessibility. コントロール パネルでは、アシスタンスを提供します。Control Panel offers assistance. たとえば、1 つの代替手段は、ナビゲーションのマウスの代わりにテンキーを使用するは。For example, one alternative is to use the numeric keypad instead of the mouse for navigation. 呼ばれる別のオプションStickyKeys、ユーザーは、一度に 1 つのキーを入力して、同じ結果を取得する (CTRL + P) など、一度に 2 つ以上のキーを保持できません。Another option, called StickyKeys, enables users who cannot hold down two or more keys at a time (such as CTRL+P) to get the same result by typing one key at a time.

Cognitive を持つユーザー、言語障碍よりニーズに対応するソフトウェア プログラムを設計したりできます。For users with cognitive and language disabilities, you can design software programs to better accommodate their needs. たとえば、工夫のシーケンス処理、表示、少ない単語は、小学校標準を対象としたの読解レベルを使用してこれらのユーザーが利用できます。For example, using conspicuous or cued sequencing, uncomplicated displays, fewer words, and a reading level targeted to elementary school standards can benefit these users.

強制疾患を持つユーザーは、強制のようなパターンを排除するソフトウェア プログラムをデザインできます。For users with seizure disorders, you can design software programs to eliminate seizure provoking patterns.

ユーザー補助アプリケーションでは、に関する情報を含むアクセシビリティの詳細については、MSDN ライブラリまたは Microsoft Web サイトでのアクセシビリティを Microsoft のドキュメントを参照してください。For more information about accessibility, including information about accessibility applications, see the documentation for Microsoft Accessibility in the MSDN library or at the Microsoft Web site.

注意

使用する、AccessibleObjectへの参照を追加する必要があります、Accessibilityと一緒にインストールされたアセンブリ、.NET Framework.NET Frameworkします。To use the AccessibleObject, you must add a reference to the Accessibility assembly installed with the .NET Framework.NET Framework. Windows フォームは、Active Accessibility 2.0 のみをサポートします。Windows Forms only supports Active Accessibility 2.0.

注意 (継承者)

このクラスから継承する場合は、すべてのメンバーをオーバーライドできます。When you inherit from this class, you can override all the members.

コンストラクター

AccessibleObject() AccessibleObject() AccessibleObject() AccessibleObject()

AccessibleObject クラスの新しいインスタンスを初期化します。Initializes a new instance of the AccessibleObject class.

フィールド

RuntimeIDFirstItem RuntimeIDFirstItem RuntimeIDFirstItem RuntimeIDFirstItem

プロパティ

Bounds Bounds Bounds Bounds

ユーザー補助オブジェクトの位置とサイズを取得します。Gets the location and size of the accessible object.

DefaultAction DefaultAction DefaultAction DefaultAction

オブジェクトの既定のアクションを説明する文字列を取得します。Gets a string that describes the default action of the object. 既定のアクションがないオブジェクトもあります。Not all objects have a default action.

Description Description Description Description

指定したオブジェクトの外観を説明する文字列を取得します。Gets a string that describes the visual appearance of the specified object. 説明が用意されていないオブジェクトもあります。Not all objects have a description.

Help Help Help Help

オブジェクトの機能または使用方法の説明を取得します。Gets a description of what the object does or how the object is used.

KeyboardShortcut KeyboardShortcut KeyboardShortcut KeyboardShortcut

ユーザー補助オブジェクトのショートカット キーまたはアクセス キーを取得します。Gets the shortcut key or access key for the accessible object.

Name Name Name Name

オブジェクト名を取得または設定します。Gets or sets the object name.

Parent Parent Parent Parent

ユーザー補助オブジェクトの親を取得します。Gets the parent of an accessible object.

Role Role Role Role

ユーザー補助オブジェクトのロールを取得します。Gets the role of this accessible object.

State State State State

ユーザー補助オブジェクトの状態を取得します。Gets the state of this accessible object.

Value Value Value Value

ユーザー補助オブジェクトの値を取得または設定します。Gets or sets the value of an accessible object.

メソッド

CreateObjRef(Type) CreateObjRef(Type) CreateObjRef(Type) CreateObjRef(Type)

リモート オブジェクトとの通信に使用するプロキシの生成に必要な情報をすべて格納しているオブジェクトを作成します。Creates an object that contains all the relevant information required to generate a proxy used to communicate with a remote object.

(Inherited from MarshalByRefObject)
DoDefaultAction() DoDefaultAction() DoDefaultAction() DoDefaultAction()

ユーザー補助オブジェクトに関連付けられた既定のアクションを実行します。Performs the default action associated with this accessible object.

Equals(Object) Equals(Object) Equals(Object) Equals(Object)

指定したオブジェクトが、現在のオブジェクトと等しいかどうかを判断します。Determines whether the specified object is equal to the current object.

(Inherited from Object)
GetChild(Int32) GetChild(Int32) GetChild(Int32) GetChild(Int32)

指定されたインデックスに対応するアクセス可能な子を取得します。Retrieves the accessible child corresponding to the specified index.

GetChildCount() GetChildCount() GetChildCount() GetChildCount()

ユーザー補助オブジェクトに属する子の数を取得します。Retrieves the number of children belonging to an accessible object.

GetFocused() GetFocused() GetFocused() GetFocused()

キーボード フォーカスを持つオブジェクトを取得します。Retrieves the object that has the keyboard focus.

GetHashCode() GetHashCode() GetHashCode() GetHashCode()

既定のハッシュ関数として機能します。Serves as the default hash function.

(Inherited from Object)
GetHelpTopic(String) GetHelpTopic(String) GetHelpTopic(String) GetHelpTopic(String)

ヘルプ トピックの識別子と、このユーザー補助オブジェクトに関連付けられたヘルプ ファイルへのパスを取得します。Gets an identifier for a Help topic identifier and the path to the Help file associated with this accessible object.

GetLifetimeService() GetLifetimeService() GetLifetimeService() GetLifetimeService()

対象のインスタンスの有効期間ポリシーを制御する、現在の有効期間サービス オブジェクトを取得します。Retrieves the current lifetime service object that controls the lifetime policy for this instance.

(Inherited from MarshalByRefObject)
GetSelected() GetSelected() GetSelected() GetSelected()

現在選択されている子を取得します。Retrieves the currently selected child.

GetType() GetType() GetType() GetType()

現在のインスタンスの Type を取得します。Gets the Type of the current instance.

(Inherited from Object)
HitTest(Int32, Int32) HitTest(Int32, Int32) HitTest(Int32, Int32) HitTest(Int32, Int32)

指定した画面座標にある子オブジェクトを取得します。Retrieves the child object at the specified screen coordinates.

InitializeLifetimeService() InitializeLifetimeService() InitializeLifetimeService() InitializeLifetimeService()

このインスタンスの有効期間ポリシーを制御する有効期間サービス オブジェクトを取得します。Obtains a lifetime service object to control the lifetime policy for this instance.

(Inherited from MarshalByRefObject)
MemberwiseClone() MemberwiseClone() MemberwiseClone() MemberwiseClone()

現在の Object の簡易コピーを作成します。Creates a shallow copy of the current Object.

(Inherited from Object)
MemberwiseClone(Boolean) MemberwiseClone(Boolean) MemberwiseClone(Boolean) MemberwiseClone(Boolean)

現在の MarshalByRefObject オブジェクトの簡易コピーを作成します。Creates a shallow copy of the current MarshalByRefObject object.

(Inherited from MarshalByRefObject)
Navigate(AccessibleNavigation) Navigate(AccessibleNavigation) Navigate(AccessibleNavigation) Navigate(AccessibleNavigation)

他のユーザー補助オブジェクトに移動します。Navigates to another accessible object.

RaiseAutomationNotification(AutomationNotificationKind, AutomationNotificationProcessing, String) RaiseAutomationNotification(AutomationNotificationKind, AutomationNotificationProcessing, String) RaiseAutomationNotification(AutomationNotificationKind, AutomationNotificationProcessing, String) RaiseAutomationNotification(AutomationNotificationKind, AutomationNotificationProcessing, String)

UI オートメーション通知イベントを発生させます。Raises the UI automation notification event.

RaiseLiveRegionChanged() RaiseLiveRegionChanged() RaiseLiveRegionChanged() RaiseLiveRegionChanged()

LiveRegionChanged UI オートメーション イベントを発生させます。Raises the LiveRegionChanged UI automation event.

Select(AccessibleSelection) Select(AccessibleSelection) Select(AccessibleSelection) Select(AccessibleSelection)

ユーザー補助オブジェクトの選択項目の修正またはキーボード フォーカスの移動を行います。Modifies the selection or moves the keyboard focus of the accessible object.

ToString() ToString() ToString() ToString()

現在のオブジェクトを表す文字列を返します。Returns a string that represents the current object.

(Inherited from Object)
UseStdAccessibleObjects(IntPtr) UseStdAccessibleObjects(IntPtr) UseStdAccessibleObjects(IntPtr) UseStdAccessibleObjects(IntPtr)

オブジェクトのハンドルに基づき、オブジェクトを AccessibleObject のインスタンスに関連付けます。Associates an object with an instance of an AccessibleObject based on the handle of the object.

UseStdAccessibleObjects(IntPtr, Int32) UseStdAccessibleObjects(IntPtr, Int32) UseStdAccessibleObjects(IntPtr, Int32) UseStdAccessibleObjects(IntPtr, Int32)

オブジェクトのハンドルと ID に基づき、オブジェクトを AccessibleObject のインスタンスに関連付けます。Associates an object with an instance of an AccessibleObject based on the handle and the object id of the object.

明示的なインターフェイスの実装

IAccessible.accChildCount IAccessible.accChildCount IAccessible.accChildCount IAccessible.accChildCount

このオブジェクトに属する子インターフェイスの数を取得します。Gets the number of child interfaces that belong to this object. このメンバーの説明については、accChildCount のトピックを参照してください。For a description of this member, see accChildCount.

IAccessible.accDoDefaultAction(Object) IAccessible.accDoDefaultAction(Object) IAccessible.accDoDefaultAction(Object) IAccessible.accDoDefaultAction(Object)

指定したオブジェクトの既定のアクションを実行します。Performs the specified object's default action. 既定のアクションがないオブジェクトもあります。Not all objects have a default action. このメンバーの説明については、accDoDefaultAction(Object) のトピックを参照してください。For a description of this member, see accDoDefaultAction(Object).

IAccessible.accFocus IAccessible.accFocus IAccessible.accFocus IAccessible.accFocus

キーボード フォーカスを持つオブジェクトを取得します。Gets the object that has the keyboard focus. このメンバーの説明については、accFocus のトピックを参照してください。For a description of this member, see accFocus.

IAccessible.accHitTest(Int32, Int32) IAccessible.accHitTest(Int32, Int32) IAccessible.accHitTest(Int32, Int32) IAccessible.accHitTest(Int32, Int32)

指定した画面座標にある子オブジェクトを取得します。Gets the child object at the specified screen coordinates. このメンバーの説明については、accHitTest(Int32, Int32) のトピックを参照してください。For a description of this member, see accHitTest(Int32, Int32).

IAccessible.accLocation(Int32, Int32, Int32, Int32, Object) IAccessible.accLocation(Int32, Int32, Int32, Int32, Object) IAccessible.accLocation(Int32, Int32, Int32, Int32, Object) IAccessible.accLocation(Int32, Int32, Int32, Int32, Object)

オブジェクトの現在の画面位置を取得します。Gets the object's current screen location. このメンバーの説明については、accLocation(Int32, Int32, Int32, Int32, Object) のトピックを参照してください。For a description of this member, see accLocation(Int32, Int32, Int32, Int32, Object).

IAccessible.accNavigate(Int32, Object) IAccessible.accNavigate(Int32, Object) IAccessible.accNavigate(Int32, Object) IAccessible.accNavigate(Int32, Object)

現在のオブジェクトを基準としてユーザー補助オブジェクトに移動します。Navigates to an accessible object relative to the current object. このメンバーの説明については、accNavigate(Int32, Object) のトピックを参照してください。For a description of this member, see accNavigate(Int32, Object).

IAccessible.accParent IAccessible.accParent IAccessible.accParent IAccessible.accParent

このオブジェクトの親ユーザー補助オブジェクトを取得します。Gets the parent accessible object of this object. このメンバーの説明については、accParent のトピックを参照してください。For a description of this member, see accParent.

IAccessible.accSelect(Int32, Object) IAccessible.accSelect(Int32, Object) IAccessible.accSelect(Int32, Object) IAccessible.accSelect(Int32, Object)

ユーザー補助オブジェクトの選択項目の修正またはキーボード フォーカスの移動を行います。Modifies the selection or moves the keyboard focus of the accessible object. このメンバーの説明については、accSelect(Int32, Object) のトピックを参照してください。For a description of this member, see accSelect(Int32, Object).

IAccessible.accSelection IAccessible.accSelection IAccessible.accSelection IAccessible.accSelection

ユーザー補助オブジェクトの選択された子オブジェクトを取得します。Gets the selected child objects of an accessible object. このメンバーの説明については、accSelection のトピックを参照してください。For a description of this member, see accSelection.

IAccessible.get_accChild(Object) IAccessible.get_accChild(Object) IAccessible.get_accChild(Object) IAccessible.get_accChild(Object)

指定された子オブジェクトを取得します。Retrieves a specified child object.

IAccessible.get_accDefaultAction(Object) IAccessible.get_accDefaultAction(Object) IAccessible.get_accDefaultAction(Object) IAccessible.get_accDefaultAction(Object)

指定されたオブジェクトの既定のアクションを示す文字列を返します。Returns a string that indicates the specified object's default action.

IAccessible.get_accDescription(Object) IAccessible.get_accDescription(Object) IAccessible.get_accDescription(Object) IAccessible.get_accDescription(Object)

指定されたアクセス可能なオブジェクトの外観を説明する文字列を返します。Returns a string that describes the visual appearance of the specified accessible object.

IAccessible.get_accHelp(Object) IAccessible.get_accHelp(Object) IAccessible.get_accHelp(Object) IAccessible.get_accHelp(Object)

指定されたアクセス可能なオブジェクトに関連付けられている WinHelp ファイルの完全なパスを取得します。Retrieves the full path of the WinHelp file that is associated with the specified accessible object.

IAccessible.get_accHelpTopic(String, Object) IAccessible.get_accHelpTopic(String, Object) IAccessible.get_accHelpTopic(String, Object) IAccessible.get_accHelpTopic(String, Object)

指定されたオブジェクトに関連付けられている WinHelp ファイルの完全なパスとファイル内の特定のトピックの識別子を取得します。Retrieves the full path of a WinHelp file that is associated with the specified object along with the identifier of a specific topic in the file.

IAccessible.get_accKeyboardShortcut(Object) IAccessible.get_accKeyboardShortcut(Object) IAccessible.get_accKeyboardShortcut(Object) IAccessible.get_accKeyboardShortcut(Object)

指定されたオブジェクトのキーボード ショートカットまたはアクセス キーを取得します。Retrieves the specified object's keyboard shortcut or access key.

IAccessible.get_accName(Object) IAccessible.get_accName(Object) IAccessible.get_accName(Object) IAccessible.get_accName(Object)

指定されたオブジェクトの名前を取得します。Retrieves the name of the specified object.

IAccessible.get_accRole(Object) IAccessible.get_accRole(Object) IAccessible.get_accRole(Object) IAccessible.get_accRole(Object)

指定されたオブジェクトのロールを説明する情報を取得します。Retrieves information that describes the role of the specified object.

IAccessible.get_accState(Object) IAccessible.get_accState(Object) IAccessible.get_accState(Object) IAccessible.get_accState(Object)

指定されたアクセス可能なオブジェクトの現在の状態を取得します。Retrieves the current state of the specified accessible object.

IAccessible.get_accValue(Object) IAccessible.get_accValue(Object) IAccessible.get_accValue(Object) IAccessible.get_accValue(Object)

指定されたアクセス可能なオブジェクトの値を取得します。Retrieves the value of the specified accessible object. 値のないオブジェクトもあります。Not all objects have a value.

IAccessible.set_accName(Object, String) IAccessible.set_accName(Object, String) IAccessible.set_accName(Object, String) IAccessible.set_accName(Object, String)

指定された要素に新しいアクセス可能な名前を割り当てます。Assigns a new accessible name to the specified element.

IAccessible.set_accValue(Object, String) IAccessible.set_accValue(Object, String) IAccessible.set_accValue(Object, String) IAccessible.set_accValue(Object, String)

指定された要素に新しい値を割り当てます。Assigns a new value to the specified element.

IReflect.GetField(String, BindingFlags) IReflect.GetField(String, BindingFlags) IReflect.GetField(String, BindingFlags) IReflect.GetField(String, BindingFlags)

指定したフィールドとバインディング フラグに対応する FieldInfo オブジェクトを取得します。Gets the FieldInfo object corresponding to the specified field and binding flag. このメンバーの説明については、GetField(String, BindingFlags) のトピックを参照してください。For a description of this member, see GetField(String, BindingFlags).

IReflect.GetFields(BindingFlags) IReflect.GetFields(BindingFlags) IReflect.GetFields(BindingFlags) IReflect.GetFields(BindingFlags)

現在のクラスのすべてのフィールドに対応する FieldInfo オブジェクトの配列を取得します。Gets an array of FieldInfo objects corresponding to all fields of the current class. このメンバーの説明については、GetFields(BindingFlags) のトピックを参照してください。For a description of this member, see GetFields(BindingFlags).

IReflect.GetMember(String, BindingFlags) IReflect.GetMember(String, BindingFlags) IReflect.GetMember(String, BindingFlags) IReflect.GetMember(String, BindingFlags)

すべてのパブリック メンバーまたは指定した名前と一致するすべてのメンバーに対応する MemberInfo オブジェクトの配列を取得します。Gets an array of MemberInfo objects corresponding to all public members or to all members that match a specified name. このメンバーの説明については、GetMember(String, BindingFlags) のトピックを参照してください。For a description of this member, see GetMember(String, BindingFlags).

IReflect.GetMembers(BindingFlags) IReflect.GetMembers(BindingFlags) IReflect.GetMembers(BindingFlags) IReflect.GetMembers(BindingFlags)

すべてのパブリック メンバーまたは現在のクラスのすべてのメンバーに対応する MemberInfo オブジェクトの配列を取得します。Gets an array of MemberInfo objects corresponding either to all public members or to all members of the current class. このメンバーの説明については、GetMembers(BindingFlags) のトピックを参照してください。For a description of this member, see GetMembers(BindingFlags).

IReflect.GetMethod(String, BindingFlags) IReflect.GetMethod(String, BindingFlags) IReflect.GetMethod(String, BindingFlags) IReflect.GetMethod(String, BindingFlags)

指定した検索制約の下で、指定したメソッドに対応する MethodInfo オブジェクトを取得します。Gets a MethodInfo object corresponding to a specified method under specified search constraints. このメンバーの説明については、GetMethod(String, BindingFlags) のトピックを参照してください。For a description of this member, see GetMethod(String, BindingFlags).

IReflect.GetMethod(String, BindingFlags, Binder, Type[], ParameterModifier[]) IReflect.GetMethod(String, BindingFlags, Binder, Type[], ParameterModifier[]) IReflect.GetMethod(String, BindingFlags, Binder, Type[], ParameterModifier[]) IReflect.GetMethod(String, BindingFlags, Binder, Type[], ParameterModifier[])

オーバーロードされたメソッドの中から選択する Type 配列を使用して、指定したメソッドに対応する MethodInfo オブジェクトを取得します。Gets a MethodInfo object corresponding to a specified method, using a Type array to choose from among overloaded methods. このメンバーの説明については、GetMethod(String, BindingFlags, Binder, Type[], ParameterModifier[]) のトピックを参照してください。For a description of this member, see GetMethod(String, BindingFlags, Binder, Type[], ParameterModifier[]).

IReflect.GetMethods(BindingFlags) IReflect.GetMethods(BindingFlags) IReflect.GetMethods(BindingFlags) IReflect.GetMethods(BindingFlags)

すべてのパブリック メソッドまたは現在のクラスのすべてのメソッドの MethodInfo オブジェクトの配列を取得します。Gets an array of MethodInfo objects with all public methods or all methods of the current class. このメンバーの説明については、GetMethods(BindingFlags) のトピックを参照してください。For a description of this member, see GetMethods(BindingFlags).

IReflect.GetProperties(BindingFlags) IReflect.GetProperties(BindingFlags) IReflect.GetProperties(BindingFlags) IReflect.GetProperties(BindingFlags)

すべてのパブリック プロパティまたは現在のクラスのすべてのプロパティに対応する PropertyInfo オブジェクトの配列を取得します。Gets an array of PropertyInfo objects corresponding to all public properties or to all properties of the current class. このメンバーの説明については、GetProperties(BindingFlags) のトピックを参照してください。For a description of this member, see GetProperties(BindingFlags).

IReflect.GetProperty(String, BindingFlags) IReflect.GetProperty(String, BindingFlags) IReflect.GetProperty(String, BindingFlags) IReflect.GetProperty(String, BindingFlags)

指定した検索制約の下で、指定したプロパティに対応する PropertyInfo オブジェクトを取得します。Gets a PropertyInfo object corresponding to a specified property under specified search constraints. このメンバーの説明については、GetProperty(String, BindingFlags) のトピックを参照してください。For a description of this member, see GetProperty(String, BindingFlags).

IReflect.GetProperty(String, BindingFlags, Binder, Type, Type[], ParameterModifier[]) IReflect.GetProperty(String, BindingFlags, Binder, Type, Type[], ParameterModifier[]) IReflect.GetProperty(String, BindingFlags, Binder, Type, Type[], ParameterModifier[]) IReflect.GetProperty(String, BindingFlags, Binder, Type, Type[], ParameterModifier[])

指定した検索制約で、指定したプロパティに対応する PropertyInfo オブジェクトを取得します。Gets a PropertyInfo object corresponding to a specified property with specified search constraints. このメンバーの説明については、GetProperty(String, BindingFlags, Binder, Type, Type[], ParameterModifier[]) のトピックを参照してください。For a description of this member, see GetProperty(String, BindingFlags, Binder, Type, Type[], ParameterModifier[]).

IReflect.InvokeMember(String, BindingFlags, Binder, Object, Object[], ParameterModifier[], CultureInfo, String[]) IReflect.InvokeMember(String, BindingFlags, Binder, Object, Object[], ParameterModifier[], CultureInfo, String[]) IReflect.InvokeMember(String, BindingFlags, Binder, Object, Object[], ParameterModifier[], CultureInfo, String[]) IReflect.InvokeMember(String, BindingFlags, Binder, Object, Object[], ParameterModifier[], CultureInfo, String[])

指定されたメンバーを呼び出します。Invokes a specified member. このメンバーの説明については、InvokeMember(String, BindingFlags, Binder, Object, Object[], ParameterModifier[], CultureInfo, String[]) のトピックを参照してください。For a description of this member, see InvokeMember(String, BindingFlags, Binder, Object, Object[], ParameterModifier[], CultureInfo, String[]).

IReflect.UnderlyingSystemType IReflect.UnderlyingSystemType IReflect.UnderlyingSystemType IReflect.UnderlyingSystemType

IReflect オブジェクトを表す基になる型を取得します。Gets the underlying type that represents the IReflect object. このメンバーの説明については、UnderlyingSystemType のトピックを参照してください。For a description of this member, see UnderlyingSystemType.

適用対象