UITypeEditor UITypeEditor UITypeEditor UITypeEditor Class

Definizione

Fornisce una classe base utilizzabile per progettare editor dei valori che siano in grado di consentire a un'interfaccia utente (UI) di rappresentare e modificare i valori degli oggetti dei tipi di dati supportati.Provides a base class that can be used to design value editors that can provide a user interface (UI) for representing and editing the values of objects of the supported data types.

public ref class UITypeEditor
public class UITypeEditor
type UITypeEditor = class
Public Class UITypeEditor
Ereditarietà
UITypeEditorUITypeEditorUITypeEditorUITypeEditor
Derivato

Esempi

Nell'esempio di codice riportato di seguito UITypeEditor viene illustrato che un oggetto può essere associato a una proprietà Integer, Double EditorAttribute o float utilizzando un oggetto per fornire un'interfaccia di selezione degli angoli dal finestra Proprietà in modalità progettazione.The following code example demonstrates that a UITypeEditor can be associated with an integer, double, or float property using an EditorAttribute to provide an angle selection interface from the Properties window in design mode. In questo esempio viene IWindowsFormsEditorService utilizzata l'interfaccia per visualizzare un controllo a discesa nella finestra Proprietà in modalità progettazione.This example uses the IWindowsFormsEditorService interface to display a drop-down control in the Properties window in design mode. Compilare il codice e aggiungere l'assembly alla casella degli strumenti usando il comando Personalizza casella degli strumenti nel menu strumenti di Visual Studio.Compile the code and add the assembly to the Toolbox using the Customize Toolbox command on the Tools menu of Visual Studio. Creare un'istanza del AngleTestControl e fare clic sul pulsante a discesa accanto alla proprietà angolo nel finestra proprietà per configurare la proprietà tramite l'editor.Create an instance of the AngleTestControl and click the drop-down button next to the Angle property in the Properties window to configure the property using the editor.

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

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

namespace AngleEditor
{
   // Provides a user interface for adjusting an angle value.
   ref class AngleControl: public System::Windows::Forms::UserControl
   {
   public:

      // Stores the angle.
      double angle;

   private:

      // Stores the rotation offset.
      int rotation;

      // Control state tracking variables.
      int dbx;
      int dby;
      int overButton;

   public:
      AngleControl( double initial_angle )
      {
         this->angle = initial_angle;
         this->SetStyle( static_cast<ControlStyles>(ControlStyles::AllPaintingInWmPaint), true );
         rotation = 0;
         dbx = -10;
         dby = -10;
         overButton = -1;
      }

   protected:
      virtual void OnPaint( System::Windows::Forms::PaintEventArgs^ e ) override
      {
         // Set angle origin point at center of control.
         int originX = (this->Width / 2);
         int originY = (this->Height / 2);

         // Fill background and ellipse and center point.
         e->Graphics->FillRectangle( gcnew SolidBrush( Color::DarkBlue ), 0, 0, this->Width, this->Height );
         e->Graphics->FillEllipse( gcnew SolidBrush( Color::White ), 1, 1, this->Width - 3, this->Height - 3 );
         e->Graphics->FillEllipse( gcnew SolidBrush( Color::SlateGray ), originX - 1, originY - 1, 3, 3 );

         // Draw angle markers.
         int startangle = (270 - rotation) % 360;
         e->Graphics->DrawString( startangle.ToString(), gcnew System::Drawing::Font( "Arial",8.0 ), gcnew SolidBrush( Color::DarkGray ), (float)(this->Width / 2) - 10, (float)10 );
         startangle = (startangle + 90) % 360;
         e->Graphics->DrawString( startangle.ToString(), gcnew System::Drawing::Font( "Arial",8 ), gcnew SolidBrush( Color::DarkGray ), (float)this->Width - 18, (float)(this->Height / 2) - 6 );
         startangle = (startangle + 90) % 360;
         e->Graphics->DrawString( startangle.ToString(), gcnew System::Drawing::Font( "Arial",8 ), gcnew SolidBrush( Color::DarkGray ), ((float)this->Width / 2) - 6, (float)this->Height - 18 );
         startangle = (startangle + 90) % 360;
         e->Graphics->DrawString( startangle.ToString(), gcnew System::Drawing::Font( "Arial",8 ), gcnew SolidBrush( Color::DarkGray ), (float)10, (float)(this->Height / 2) - 6 );

         // Draw line along the current angle.
         double radians = ((((int)(angle + rotation) + 360) % 360) * Math::PI) / (double)180;
         e->Graphics->DrawLine( gcnew Pen( gcnew SolidBrush( Color::Red ),1 ), originX, originY, originX + (int)((double)originX * (double)Math::Cos( radians )), originY + (int)((double)originY * (double)Math::Sin( radians )) );

         // Output angle information.
         e->Graphics->FillRectangle( gcnew SolidBrush( Color::Gray ), this->Width - 84, 3, 82, 13 );
         e->Graphics->DrawString( String::Format( "Angle: {0}", angle.ToString( "F4" ) ), gcnew System::Drawing::Font( "Arial",8 ), gcnew SolidBrush( Color::Yellow ), (float)this->Width - 84, (float)2 );

         // Draw square at mouse position of last angle adjustment.
         e->Graphics->DrawRectangle( gcnew Pen( gcnew SolidBrush( Color::Black ),1 ), dbx - 2, dby - 2, 4, 4 );

         // Draw rotation adjustment buttons.
         if ( overButton == 1 )
         {
            e->Graphics->FillRectangle( gcnew SolidBrush( Color::Green ), this->Width - 28, this->Height - 14, 12, 12 );
            e->Graphics->FillRectangle( gcnew SolidBrush( Color::Gray ), 2, this->Height - 13, 110, 12 );
            e->Graphics->DrawString( "Rotate 90 degrees left", gcnew System::Drawing::Font( "Arial",8 ), gcnew SolidBrush( Color::White ), (float)2, (float)this->Height - 14 );
         }
         else
                  e->Graphics->FillRectangle( gcnew SolidBrush( Color::DarkGreen ), this->Width - 28, this->Height - 14, 12, 12 );

         if ( overButton == 2 )
         {
            e->Graphics->FillRectangle( gcnew SolidBrush( Color::Green ), this->Width - 14, this->Height - 14, 12, 12 );
            e->Graphics->FillRectangle( gcnew SolidBrush( Color::Gray ), 2, this->Height - 13, 116, 12 );
            e->Graphics->DrawString( "Rotate 90 degrees right", gcnew System::Drawing::Font( "Arial",8 ), gcnew SolidBrush( Color::White ), (float)2, (float)this->Height - 14 );
         }
         else
                  e->Graphics->FillRectangle( gcnew SolidBrush( Color::DarkGreen ), this->Width - 14, this->Height - 14, 12, 12 );

         e->Graphics->DrawEllipse( gcnew Pen( gcnew SolidBrush( Color::White ),1 ), this->Width - 11, this->Height - 11, 6, 6 );
         e->Graphics->DrawEllipse( gcnew Pen( gcnew SolidBrush( Color::White ),1 ), this->Width - 25, this->Height - 11, 6, 6 );
         if ( overButton == 1 )
                  e->Graphics->FillRectangle( gcnew SolidBrush( Color::Green ), this->Width - 25, this->Height - 6, 4, 4 );
         else
                  e->Graphics->FillRectangle( gcnew SolidBrush( Color::DarkGreen ), this->Width - 25, this->Height - 6, 4, 4 );

         if ( overButton == 2 )
                  e->Graphics->FillRectangle( gcnew SolidBrush( Color::Green ), this->Width - 8, this->Height - 6, 4, 4 );
         else
                  e->Graphics->FillRectangle( gcnew SolidBrush( Color::DarkGreen ), this->Width - 8, this->Height - 6, 4, 4 );

         array<Point>^ temp0 = {Point(this->Width - 7,this->Height - 8),Point(this->Width - 3,this->Height - 8),Point(this->Width - 5,this->Height - 4)};
         e->Graphics->FillPolygon( gcnew SolidBrush( Color::White ), temp0 );
         array<Point>^ temp1 = {Point(this->Width - 26,this->Height - 8),Point(this->Width - 21,this->Height - 8),Point(this->Width - 25,this->Height - 4)};
         e->Graphics->FillPolygon( gcnew SolidBrush( Color::White ), temp1 );
      }

      virtual void OnMouseDown( System::Windows::Forms::MouseEventArgs^ e ) override
      {
         // Handle rotation adjustment button clicks.
         if ( e->X >= this->Width - 28 && e->X <= this->Width - 2 && e->Y >= this->Height - 14 && e->Y <= this->Height - 2 )
         {
            if ( e->X <= this->Width - 16 )
                        rotation -= 90;
            else
            if ( e->X >= this->Width - 14 )
                        rotation += 90;

            if ( rotation < 0 )
                        rotation += 360;

            rotation = rotation % 360;
            dbx = -10;
            dby = -10;
         }
         else
                  UpdateAngle( e->X, e->Y );

         this->Refresh();
      }

      virtual void OnMouseMove( System::Windows::Forms::MouseEventArgs^ e ) override
      {
         if ( e->Button == ::MouseButtons::Left )
         {
            UpdateAngle( e->X, e->Y );
            overButton = -1;
         }
         else
         if ( e->X >= this->Width - 28 && e->X <= this->Width - 16 && e->Y >= this->Height - 14 && e->Y <= this->Height - 2 )
                  overButton = 1;
         else
         if ( e->X >= this->Width - 14 && e->X <= this->Width - 2 && e->Y >= this->Height - 14 && e->Y <= this->Height - 2 )
                  overButton = 2;
         else
                  overButton = -1;

         this->Refresh();
      }

   private:
      void UpdateAngle( int mx, int my )
      {
         // Store mouse coordinates.
         dbx = mx;
         dby = my;
         
         // Translate y coordinate input to GetAngle function to correct for ellipsoid distortion.
         double widthToHeightRatio = (double)this->Width / (double)this->Height;
         int tmy;
         if ( my == 0 )
                  tmy = my;
         else
         if ( my < this->Height / 2 )
                  tmy = (this->Height / 2) - (int)(((this->Height / 2) - my) * widthToHeightRatio);
         else
                  tmy = (this->Height / 2) + (int)((double)(my - (this->Height / 2)) * widthToHeightRatio);

         // Retrieve updated angle based on rise over run.
         angle = (int)(GetAngle( this->Width / 2, this->Height / 2, mx, tmy ) - rotation) % 360;
      }

      double GetAngle( int x1, int y1, int x2, int y2 )
      {
         double degrees;

         // Avoid divide by zero run values.
         if ( x2 - x1 == 0 )
         {
            if ( y2 > y1 )
                        degrees = 90;
            else
                        degrees = 270;
         }
         else
         {
            // Calculate angle from offset.
            double riseoverrun = (double)(y2 - y1) / (double)(x2 - x1);
            double radians = Math::Atan( riseoverrun );
            degrees = radians * ((double)180 / Math::PI);
            
            // Handle quadrant specific transformations.
            if ( (x2 - x1) < 0 || (y2 - y1) < 0 )
                        degrees += 180;

            if ( (x2 - x1) > 0 && (y2 - y1) < 0 )
                        degrees -= 180;

            if ( degrees < 0 )
                        degrees += 360;
         }

         return degrees;
      }
   };

   // This UITypeEditor can be associated with Int32, Double and Single
   // properties to provide a design-mode angle selection interface.
   [System::Security::Permissions::PermissionSetAttribute
   (System::Security::Permissions::SecurityAction::InheritanceDemand, Name="FullTrust")]
   [System::Security::Permissions::PermissionSetAttribute
   (System::Security::Permissions::SecurityAction::LinkDemand, Name="FullTrust")]
   public ref class AngleEditor: public System::Drawing::Design::UITypeEditor
   {
   public:
      AngleEditor(){}

      // Indicates whether the UITypeEditor provides a form-based (modal) dialog,
      // drop down dialog, or no UI outside of the properties window.
      virtual System::Drawing::Design::UITypeEditorEditStyle GetEditStyle( System::ComponentModel::ITypeDescriptorContext^ context ) override
      {
         return UITypeEditorEditStyle::DropDown;
      }

      // Displays the UI for value selection.
      virtual Object^ EditValue( System::ComponentModel::ITypeDescriptorContext^ context, System::IServiceProvider^ provider, Object^ value ) override
      {
         // Return the value if the value is not of type Int32, Double and Single.
         if ( value->GetType() != double::typeid && value->GetType() != float::typeid && value->GetType() != int::typeid )
                  return value;
         
         // Uses the IWindowsFormsEditorService* to display a
         // drop-down UI in the Properties window.
         IWindowsFormsEditorService^ edSvc = dynamic_cast<IWindowsFormsEditorService^>(provider->GetService( IWindowsFormsEditorService::typeid ));
         if ( edSvc != nullptr )
         {
            // Display an angle selection control and retrieve the value.
            AngleControl^ angleControl = gcnew AngleControl(  *dynamic_cast<double^>(value) );
            edSvc->DropDownControl( angleControl );

            // Return the value in the appropraite data format.
            if ( value->GetType() == double::typeid )
                        return angleControl->angle;
            else
            if ( value->GetType() == float::typeid )
                        return (float)angleControl->angle;
            else
            if ( value->GetType() == int::typeid )
                        return (int)angleControl->angle;
         }

         return value;
      }

      // Draws a representation of the property's value.
   private:
      void PaintValue( System::Drawing::Design::PaintValueEventArgs^ e ) new
      {
         int normalX = (e->Bounds.Width / 2);
         int normalY = (e->Bounds.Height / 2);
         
         // Fill background and ellipse and center point.
         e->Graphics->FillRectangle( gcnew SolidBrush( Color::DarkBlue ), e->Bounds.X, e->Bounds.Y, e->Bounds.Width, e->Bounds.Height );
         e->Graphics->FillEllipse( gcnew SolidBrush( Color::White ), e->Bounds.X + 1, e->Bounds.Y + 1, e->Bounds.Width - 3, e->Bounds.Height - 3 );
         e->Graphics->FillEllipse( gcnew SolidBrush( Color::SlateGray ), normalX + e->Bounds.X - 1, normalY + e->Bounds.Y - 1, 3, 3 );
         
         // Draw line along the current angle.
         double radians = ( *dynamic_cast<double^>(e->Value) * Math::PI) / (double)180;
         e->Graphics->DrawLine( gcnew Pen( gcnew SolidBrush( Color::Red ),1 ), normalX + e->Bounds.X, normalY + e->Bounds.Y, e->Bounds.X + (normalX + (int)((double)normalX * Math::Cos( radians ))), e->Bounds.Y + (normalY + (int)((double)normalY * Math::Sin( radians ))) );
      }

      // Indicates whether the UITypeEditor supports painting a
      // representation of a property's value.
      bool GetPaintValueSupported( System::ComponentModel::ITypeDescriptorContext^ context ) new
      {
         return true;
      }
   };

   public ref class AngleEditorTestControl: public System::Windows::Forms::UserControl
   {
   private:
      double int_angle;

   public:

      property double Angle 
      {
         [BrowsableAttribute(true)]
         [EditorAttribute(AngleEditor::typeid,System::Drawing::Design::UITypeEditor::typeid)]
         double get()
         {
            return int_angle;
         }

         void set( double value )
         {
            int_angle = value;
         }

      }
      AngleEditorTestControl()
      {
         int_angle = 90;
         this->Size = System::Drawing::Size( 190, 42 );
         this->BackColor = Color::Beige;
      }

   protected:
      virtual void OnPaint( System::Windows::Forms::PaintEventArgs^ e ) override
      {
         if ( this->DesignMode )
         {
            e->Graphics->DrawString( "Use the Properties Window to access", 
               gcnew System::Drawing::Font( "Arial",8 ), gcnew SolidBrush( Color::Black ), 3, 2 );
            e->Graphics->DrawString( "the AngleEditor UITypeEditor by", 
               gcnew System::Drawing::Font( "Arial",8 ), gcnew SolidBrush( Color::Black ), 3, 14 );
            e->Graphics->DrawString( "configuring the \"Angle\" property.", 
               gcnew System::Drawing::Font( "Arial",8 ), gcnew SolidBrush( Color::Black ), 3, 26 );
         }
         else
            e->Graphics->DrawString( "This example requires design mode.", 
               gcnew System::Drawing::Font( "Arial",8 ), gcnew SolidBrush( Color::Black ), 3, 2 );
      }
   };
}
using System;
using System.ComponentModel;
using System.Drawing;
using System.Drawing.Design;
using System.Windows.Forms;
using System.Windows.Forms.Design;

namespace AngleEditor
{
    // This UITypeEditor can be associated with Int32, Double and Single
    // properties to provide a design-mode angle selection interface.
    [System.Security.Permissions.PermissionSet(System.Security.Permissions.SecurityAction.Demand, Name = "FullTrust")] 
    public class AngleEditor : System.Drawing.Design.UITypeEditor
    {        
        public AngleEditor()
        {
        }

        // Indicates whether the UITypeEditor provides a form-based (modal) dialog, 
        // drop down dialog, or no UI outside of the properties window.
        public override System.Drawing.Design.UITypeEditorEditStyle GetEditStyle(System.ComponentModel.ITypeDescriptorContext context)
        {
            return UITypeEditorEditStyle.DropDown;
        }

        // Displays the UI for value selection.
        public override object EditValue(System.ComponentModel.ITypeDescriptorContext context, System.IServiceProvider provider, object value)
        {            
            // Return the value if the value is not of type Int32, Double and Single.
            if( value.GetType() != typeof(double) && value.GetType() != typeof(float) && value.GetType() != typeof(int) )
                return value;

            // Uses the IWindowsFormsEditorService to display a 
            // drop-down UI in the Properties window.
            IWindowsFormsEditorService edSvc = (IWindowsFormsEditorService)provider.GetService(typeof(IWindowsFormsEditorService));
            if( edSvc != null )
            {
                // Display an angle selection control and retrieve the value.
                AngleControl angleControl = new AngleControl((double)value);
                edSvc.DropDownControl( angleControl );

                // Return the value in the appropraite data format.
                if( value.GetType() == typeof(double) )
                    return angleControl.angle;
                else if( value.GetType() == typeof(float) )
                    return (float)angleControl.angle;
                else if( value.GetType() == typeof(int) )
                    return (int)angleControl.angle;
            }
            return value;
        }

        // Draws a representation of the property's value.
        public override void PaintValue(System.Drawing.Design.PaintValueEventArgs e)
        {
            int normalX = (e.Bounds.Width/2);
            int normalY = (e.Bounds.Height/2);
            
            // Fill background and ellipse and center point.
            e.Graphics.FillRectangle(new SolidBrush(Color.DarkBlue), e.Bounds.X, e.Bounds.Y, e.Bounds.Width, e.Bounds.Height);            
            e.Graphics.FillEllipse(new SolidBrush(Color.White), e.Bounds.X+1, e.Bounds.Y+1, e.Bounds.Width-3, e.Bounds.Height-3);
            e.Graphics.FillEllipse(new SolidBrush(Color.SlateGray), normalX+e.Bounds.X-1, normalY+e.Bounds.Y-1, 3, 3);
            
            // Draw line along the current angle.
            double radians = ((double)e.Value*Math.PI) / (double)180;
            e.Graphics.DrawLine( new Pen(new SolidBrush(Color.Red), 1), normalX+e.Bounds.X, normalY+e.Bounds.Y, 
                e.Bounds.X+ ( normalX + (int)( (double)normalX * Math.Cos( radians ) ) ),
                e.Bounds.Y+ ( normalY + (int)( (double)normalY * Math.Sin( radians ) ) ) );
        }
        
        // Indicates whether the UITypeEditor supports painting a 
        // representation of a property's value.
        public override bool GetPaintValueSupported(System.ComponentModel.ITypeDescriptorContext context)
        {
            return true;
        }
    }

    // Provides a user interface for adjusting an angle value.
    internal class AngleControl : System.Windows.Forms.UserControl
    {
        // Stores the angle.
        public double angle;
        // Stores the rotation offset.
        private int rotation = 0;
        // Control state tracking variables.
        private int dbx = -10;
        private int dby = -10;
        private int overButton = -1;
        
        public AngleControl(double initial_angle)
        {
            this.angle = initial_angle;                 
            this.SetStyle( ControlStyles.AllPaintingInWmPaint, true );
        }

        protected override void OnPaint(System.Windows.Forms.PaintEventArgs e)
        {
            // Set angle origin point at center of control.
            int originX = (this.Width/2);
            int originY = (this.Height/2);            
            
            // Fill background and ellipse and center point.
            e.Graphics.FillRectangle(new SolidBrush(Color.DarkBlue), 0, 0, this.Width, this.Height);
            e.Graphics.FillEllipse(new SolidBrush(Color.White), 1, 1, this.Width-3, this.Height-3);            
            e.Graphics.FillEllipse(new SolidBrush(Color.SlateGray), originX-1, originY-1, 3, 3);
            
            // Draw angle markers.
            int startangle = (270-rotation)%360;
            e.Graphics.DrawString(startangle.ToString(), new Font("Arial", 8), new SolidBrush(Color.DarkGray), (this.Width/2)-10, 10);
            startangle = (startangle+90)%360;
            e.Graphics.DrawString(startangle.ToString(), new Font("Arial", 8), new SolidBrush(Color.DarkGray), this.Width-18, (this.Height/2)-6);
            startangle = (startangle+90)%360;
            e.Graphics.DrawString(startangle.ToString(), new Font("Arial", 8), new SolidBrush(Color.DarkGray), (this.Width/2)-6, this.Height-18);
            startangle = (startangle+90)%360;
            e.Graphics.DrawString(startangle.ToString(), new Font("Arial", 8), new SolidBrush(Color.DarkGray), 10, (this.Height/2)-6);

            // Draw line along the current angle.         
            double radians = ((((angle+rotation)+360)%360)*Math.PI) / (double)180;
            e.Graphics.DrawLine( new Pen(new SolidBrush(Color.Red), 1), originX, originY, 
                originX + (int)( (double)originX * (double)Math.Cos( radians )   ),
                originY + (int)( (double)originY * (double)Math.Sin( radians ) ) );
            
            // Output angle information.
            e.Graphics.FillRectangle(new SolidBrush(Color.Gray), this.Width-84, 3, 82, 13);
            e.Graphics.DrawString("Angle: "+angle.ToString("F4"), new Font("Arial", 8), new SolidBrush(Color.Yellow), this.Width-84, 2);
            // Draw square at mouse position of last angle adjustment.
            e.Graphics.DrawRectangle(new Pen(new SolidBrush(Color.Black), 1), dbx-2, dby-2, 4, 4);
            // Draw rotation adjustment buttons.
            if( overButton == 1 )
            {
                e.Graphics.FillRectangle(new SolidBrush(Color.Green), this.Width-28, this.Height-14, 12, 12);
                e.Graphics.FillRectangle(new SolidBrush(Color.Gray), 2, this.Height-13, 110, 12);    
                e.Graphics.DrawString("Rotate 90 degrees left", new Font("Arial", 8), new SolidBrush(Color.White), 2, this.Height-14);
            }
            else            
                e.Graphics.FillRectangle(new SolidBrush(Color.DarkGreen), this.Width-28, this.Height-14, 12, 12);
            if( overButton == 2 )
            {
                e.Graphics.FillRectangle(new SolidBrush(Color.Green), this.Width-14, this.Height-14, 12, 12);
                e.Graphics.FillRectangle(new SolidBrush(Color.Gray), 2, this.Height-13, 116, 12);    
                e.Graphics.DrawString("Rotate 90 degrees right", new Font("Arial", 8), new SolidBrush(Color.White), 2, this.Height-14);
            }
            else
                e.Graphics.FillRectangle(new SolidBrush(Color.DarkGreen), this.Width-14, this.Height-14, 12, 12);
            e.Graphics.DrawEllipse(new Pen(new SolidBrush(Color.White), 1), this.Width-11, this.Height-11, 6, 6);
            e.Graphics.DrawEllipse(new Pen(new SolidBrush(Color.White), 1), this.Width-25, this.Height-11, 6, 6);
            if( overButton == 1 )
                e.Graphics.FillRectangle(new SolidBrush(Color.Green), this.Width-25, this.Height-6, 4, 4);
            else
                e.Graphics.FillRectangle(new SolidBrush(Color.DarkGreen), this.Width-25, this.Height-6, 4, 4);
            if( overButton == 2 )
                e.Graphics.FillRectangle(new SolidBrush(Color.Green), this.Width-8, this.Height-6, 4, 4);
            else
                e.Graphics.FillRectangle(new SolidBrush(Color.DarkGreen), this.Width-8, this.Height-6, 4, 4);
            e.Graphics.FillPolygon(new SolidBrush(Color.White), new Point[] { new Point(this.Width-7, this.Height-8), new Point(this.Width-3, this.Height-8), new Point(this.Width-5, this.Height-4) });
            e.Graphics.FillPolygon(new SolidBrush(Color.White), new Point[] { new Point(this.Width-26, this.Height-8), new Point(this.Width-21, this.Height-8), new Point(this.Width-25, this.Height-4) });            
        }

        protected override void OnMouseDown(System.Windows.Forms.MouseEventArgs e)
        {            
            // Handle rotation adjustment button clicks.
            if( e.X >= this.Width-28 && e.X <= this.Width-2 && e.Y >= this.Height-14 && e.Y <= this.Height-2 )
            {
                if( e.X <= this.Width-16 )
                    rotation -= 90;
                else if( e.X >= this.Width-14 )
                    rotation += 90;
                if( rotation < 0 )
                    rotation += 360;
                rotation = rotation%360;
                dbx=-10;
                dby=-10;
            }
            else
                UpdateAngle(e.X, e.Y);                
            this.Refresh();        
        }

        protected override void OnMouseMove(System.Windows.Forms.MouseEventArgs e)
        {
            if( e.Button == MouseButtons.Left )
            {
                UpdateAngle(e.X, e.Y);                                        
                overButton = -1;                
            }
            else if( e.X >= this.Width-28 && e.X <= this.Width-16 && e.Y >= this.Height-14 && e.Y <= this.Height-2 )
                overButton = 1;
            else if( e.X >= this.Width-14 && e.X <= this.Width-2 && e.Y >= this.Height-14 && e.Y <= this.Height-2 )
                overButton = 2;
            else
                overButton = -1;
            this.Refresh();
        }

        private void UpdateAngle(int mx, int my)
        {
            // Store mouse coordinates.
            dbx = mx;
            dby = my;

            // Translate y coordinate input to GetAngle function to correct for ellipsoid distortion.
            double widthToHeightRatio =  (double)this.Width/(double)this.Height;                        
            int tmy;
            if( my == 0 )
                tmy = my;
            else if( my < this.Height/2 )
                tmy = (this.Height/2)-(int)(((this.Height/2)-my)*widthToHeightRatio);                
            else
                tmy = (this.Height/2)+(int)((double)(my-(this.Height/2))*widthToHeightRatio);
            
            // Retrieve updated angle based on rise over run.
            angle = (GetAngle(this.Width/2, this.Height/2, mx, tmy)-rotation)%360;                                    
        }

        private double GetAngle(int x1, int y1, int x2, int y2)
        {  
            double degrees;
           
            // Avoid divide by zero run values.
            if( x2-x1 == 0 )
            {
                if( y2 > y1 )
                    degrees = 90;
                else
                    degrees = 270;
            }
            else
            {
                // Calculate angle from offset.
                double riseoverrun = (double)(y2-y1)/(double)(x2-x1);
                double radians = Math.Atan( riseoverrun );
                degrees = radians * ((double)180/Math.PI);
                
                // Handle quadrant specific transformations.       
                if( (x2-x1) < 0 || (y2-y1) < 0 )
                    degrees += 180;
                if( (x2-x1) > 0 && (y2-y1) < 0 )
                    degrees -= 180;
                if( degrees < 0 )
                    degrees += 360;
            }
            return degrees;
        }
    }

    public class AngleEditorTestControl : System.Windows.Forms.UserControl
    {
        private double int_angle;

        [BrowsableAttribute(true)]
        [EditorAttribute(typeof(AngleEditor), typeof(System.Drawing.Design.UITypeEditor))]        
        public double Angle
        {
            get
            { return int_angle; }
            set
            { int_angle = value; }
        }        

        public AngleEditorTestControl()
        {
            int_angle = 90;
            this.Size = new Size(190, 42);
            this.BackColor = Color.Beige;			
        }

        protected override void OnPaint(System.Windows.Forms.PaintEventArgs e)
        {
            if( this.DesignMode )
            {
                e.Graphics.DrawString("Use the Properties Window to access", new Font("Arial", 8), new SolidBrush(Color.Black), 3,2);
                e.Graphics.DrawString("the AngleEditor UITypeEditor by", new Font("Arial", 8), new SolidBrush(Color.Black), 3,14);
                e.Graphics.DrawString("configuring the \"Angle\" property.", new Font("Arial", 8), new SolidBrush(Color.Black), 3,26);
            }
            else
                e.Graphics.DrawString("This example requires design mode.", new Font("Arial", 8), new SolidBrush(Color.Black), 3,2);
        }
    }
}
Option Strict Off
Imports System.ComponentModel
Imports System.Drawing
Imports System.Drawing.Design
Imports System.Reflection
Imports System.Windows.Forms
Imports System.Windows.Forms.Design

' This UITypeEditor can be associated with Int32, Double and Single
' properties to provide a design-mode angle selection interface.
<System.Security.Permissions.PermissionSetAttribute(System.Security.Permissions.SecurityAction.Demand, Name:="FullTrust")> _
Public Class AngleEditor
    Inherits System.Drawing.Design.UITypeEditor

    Public Sub New()
    End Sub

    ' Indicates whether the UITypeEditor provides a form-based (modal) dialog, 
    ' drop down dialog, or no UI outside of the properties window.
    Public Overloads Overrides Function GetEditStyle(ByVal context As System.ComponentModel.ITypeDescriptorContext) As System.Drawing.Design.UITypeEditorEditStyle
        Return UITypeEditorEditStyle.DropDown
    End Function

    ' Displays the UI for value selection.
    Public Overloads Overrides Function EditValue(ByVal context As System.ComponentModel.ITypeDescriptorContext, ByVal provider As System.IServiceProvider, ByVal value As Object) As Object
        ' Return the value if the value is not of type Int32, Double and Single.
        If value.GetType() IsNot GetType(Double) AndAlso value.GetType() IsNot GetType(Single) AndAlso value.GetType() IsNot GetType(Integer) Then
            Return value
        End If
        ' Uses the IWindowsFormsEditorService to display a 
        ' drop-down UI in the Properties window.
        Dim edSvc As IWindowsFormsEditorService = CType(provider.GetService(GetType(IWindowsFormsEditorService)), IWindowsFormsEditorService)
        If (edSvc IsNot Nothing) Then
            ' Display an angle selection control and retrieve the value.
            Dim angleControl As New AngleControl(System.Convert.ToDouble(value))
            edSvc.DropDownControl(angleControl)

            ' Return the value in the appropraite data format.
            If value Is GetType(Double) Then
                Return angleControl.angle
            ElseIf value Is GetType(Single) Then
                Return System.Convert.ToSingle(angleControl.angle)
            ElseIf value Is GetType(Integer) Then
                Return System.Convert.ToInt32(angleControl.angle)
            End If
        End If
        Return value
    End Function

    ' Draws a representation of the property's value.
    Public Overloads Overrides Sub PaintValue(ByVal e As System.Drawing.Design.PaintValueEventArgs)
        Dim normalX As Integer = e.Bounds.Width / 2
        Dim normalY As Integer = e.Bounds.Height / 2

        ' Fill background and ellipse and center point.
        e.Graphics.FillRectangle(New SolidBrush(Color.DarkBlue), e.Bounds.X, e.Bounds.Y, e.Bounds.Width, e.Bounds.Height)
        e.Graphics.FillEllipse(New SolidBrush(Color.White), e.Bounds.X + 1, e.Bounds.Y + 1, e.Bounds.Width - 3, e.Bounds.Height - 3)
        e.Graphics.FillEllipse(New SolidBrush(Color.SlateGray), normalX + e.Bounds.X - 1, normalY + e.Bounds.Y - 1, 3, 3)

        ' Draw line along the current angle.
        Dim radians As Double = System.Convert.ToDouble(e.Value) * Math.PI / System.Convert.ToDouble(180)
        e.Graphics.DrawLine(New Pen(New SolidBrush(Color.Red), 1), normalX + e.Bounds.X, normalY + e.Bounds.Y, e.Bounds.X + (normalX + System.Convert.ToInt32(System.Convert.ToDouble(normalX) * Math.Cos(radians))), e.Bounds.Y + (normalY + System.Convert.ToInt32(System.Convert.ToDouble(normalY) * Math.Sin(radians))))
    End Sub

    ' Indicates whether the UITypeEditor supports painting a 
    ' representation of a property's value.
    Public Overloads Overrides Function GetPaintValueSupported(ByVal context As System.ComponentModel.ITypeDescriptorContext) As Boolean
        Return True
    End Function
End Class

' Provides a user interface for adjusting an angle value.
Friend Class AngleControl
    Inherits System.Windows.Forms.UserControl

    ' Stores the angle.
    Public angle As Double
    ' Stores the rotation offset.
    Private rotation As Integer = 0
    ' Control state tracking variables.
    Private dbx As Integer = -10
    Private dby As Integer = -10
    Private overButton As Integer = -1

    Public Sub New(ByVal initial_angle As Double)
        Me.angle = initial_angle
        Me.SetStyle(ControlStyles.AllPaintingInWmPaint, True)
    End Sub

    Protected Overrides Sub OnPaint(ByVal e As System.Windows.Forms.PaintEventArgs)
        ' Set angle origin point at center of control.
        Dim originX As Integer = Me.Width / 2
        Dim originY As Integer = Me.Height / 2

        ' Fill background and ellipse and center point.
        e.Graphics.FillRectangle(New SolidBrush(Color.DarkBlue), 0, 0, Me.Width, Me.Height)
        e.Graphics.FillEllipse(New SolidBrush(Color.White), 1, 1, Me.Width - 3, Me.Height - 3)
        e.Graphics.FillEllipse(New SolidBrush(Color.SlateGray), originX - 1, originY - 1, 3, 3)

        ' Draw angle markers.
        Dim startangle As Integer = (270 - rotation) Mod 360
        e.Graphics.DrawString(startangle.ToString(), New Font("Arial", 8), New SolidBrush(Color.DarkGray), Me.Width / 2 - 10, 10)
        startangle = (startangle + 90) Mod 360
        e.Graphics.DrawString(startangle.ToString(), New Font("Arial", 8), New SolidBrush(Color.DarkGray), Me.Width - 18, Me.Height / 2 - 6)
        startangle = (startangle + 90) Mod 360
        e.Graphics.DrawString(startangle.ToString(), New Font("Arial", 8), New SolidBrush(Color.DarkGray), Me.Width / 2 - 6, Me.Height - 18)
        startangle = (startangle + 90) Mod 360
        e.Graphics.DrawString(startangle.ToString(), New Font("Arial", 8), New SolidBrush(Color.DarkGray), 10, Me.Height / 2 - 6)

        ' Draw line along the current angle.   
        Dim radians As Double = ((angle + rotation + 360) Mod 360) * Math.PI / System.Convert.ToDouble(180)
        e.Graphics.DrawLine(New Pen(New SolidBrush(Color.Red), 1), originX, originY, originX + System.Convert.ToInt32(System.Convert.ToDouble(originX) * Math.Cos(radians)), originY + System.Convert.ToInt32(System.Convert.ToDouble(originY) * Math.Sin(radians)))

        ' Output angle information.
        e.Graphics.FillRectangle(New SolidBrush(Color.Gray), Me.Width - 84, 3, 82, 13)
        e.Graphics.DrawString("Angle: " + angle.ToString("F4"), New Font("Arial", 8), New SolidBrush(Color.Yellow), Me.Width - 84, 2)
        ' Draw square at mouse position of last angle adjustment.
        e.Graphics.DrawRectangle(New Pen(New SolidBrush(Color.Black), 1), dbx - 2, dby - 2, 4, 4)
        ' Draw rotation adjustment buttons.
        If overButton = 1 Then
            e.Graphics.FillRectangle(New SolidBrush(Color.Green), Me.Width - 28, Me.Height - 14, 12, 12)
            e.Graphics.FillRectangle(New SolidBrush(Color.Gray), 2, Me.Height - 13, 110, 12)
            e.Graphics.DrawString("Rotate 90 degrees left", New Font("Arial", 8), New SolidBrush(Color.White), 2, Me.Height - 14)
        Else
            e.Graphics.FillRectangle(New SolidBrush(Color.DarkGreen), Me.Width - 28, Me.Height - 14, 12, 12)
        End If
        If overButton = 2 Then
            e.Graphics.FillRectangle(New SolidBrush(Color.Green), Me.Width - 14, Me.Height - 14, 12, 12)
            e.Graphics.FillRectangle(New SolidBrush(Color.Gray), 2, Me.Height - 13, 116, 12)
            e.Graphics.DrawString("Rotate 90 degrees right", New Font("Arial", 8), New SolidBrush(Color.White), 2, Me.Height - 14)
        Else
            e.Graphics.FillRectangle(New SolidBrush(Color.DarkGreen), Me.Width - 14, Me.Height - 14, 12, 12)
        End If
        e.Graphics.DrawEllipse(New Pen(New SolidBrush(Color.White), 1), Me.Width - 11, Me.Height - 11, 6, 6)
        e.Graphics.DrawEllipse(New Pen(New SolidBrush(Color.White), 1), Me.Width - 25, Me.Height - 11, 6, 6)
        If overButton = 1 Then
            e.Graphics.FillRectangle(New SolidBrush(Color.Green), Me.Width - 25, Me.Height - 6, 4, 4)
        Else
            e.Graphics.FillRectangle(New SolidBrush(Color.DarkGreen), Me.Width - 25, Me.Height - 6, 4, 4)
        End If
        If overButton = 2 Then
            e.Graphics.FillRectangle(New SolidBrush(Color.Green), Me.Width - 8, Me.Height - 6, 4, 4)
        Else
            e.Graphics.FillRectangle(New SolidBrush(Color.DarkGreen), Me.Width - 8, Me.Height - 6, 4, 4)
        End If
        e.Graphics.FillPolygon(New SolidBrush(Color.White), New Point() {New Point(Me.Width - 7, Me.Height - 8), New Point(Me.Width - 3, Me.Height - 8), New Point(Me.Width - 5, Me.Height - 4)})
        e.Graphics.FillPolygon(New SolidBrush(Color.White), New Point() {New Point(Me.Width - 26, Me.Height - 8), New Point(Me.Width - 21, Me.Height - 8), New Point(Me.Width - 25, Me.Height - 4)})
    End Sub

    Protected Overrides Sub OnMouseDown(ByVal e As System.Windows.Forms.MouseEventArgs)
        ' Handle rotation adjustment button clicks.
        If e.X >= Me.Width - 28 AndAlso e.X <= Me.Width - 2 AndAlso e.Y >= Me.Height - 14 AndAlso e.Y <= Me.Height - 2 Then
            If e.X <= Me.Width - 16 Then
                rotation -= 90
            ElseIf e.X >= Me.Width - 14 Then
                rotation += 90
            End If
            If rotation < 0 Then
                rotation += 360
            End If
            rotation = rotation Mod 360
            dbx = -10
            dby = -10
        Else
            UpdateAngle(e.X, e.Y)
        End If
        Me.Refresh()
    End Sub

    Protected Overrides Sub OnMouseMove(ByVal e As System.Windows.Forms.MouseEventArgs)
        If e.Button = System.Windows.Forms.MouseButtons.Left Then
            UpdateAngle(e.X, e.Y)
            overButton = -1
        ElseIf e.X >= Me.Width - 28 AndAlso e.X <= Me.Width - 16 AndAlso e.Y >= Me.Height - 14 AndAlso e.Y <= Me.Height - 2 Then
            overButton = 1
        ElseIf e.X >= Me.Width - 14 AndAlso e.X <= Me.Width - 2 AndAlso e.Y >= Me.Height - 14 AndAlso e.Y <= Me.Height - 2 Then
            overButton = 2
        Else
            overButton = -1
        End If
        Me.Refresh()
    End Sub

    Private Sub UpdateAngle(ByVal mx As Integer, ByVal my As Integer)
        ' Store mouse coordinates.
        dbx = mx
        dby = my

        ' Translate y coordinate input to GetAngle function to correct for ellipsoid distortion.
        Dim widthToHeightRatio As Double = System.Convert.ToDouble(Me.Width) / System.Convert.ToDouble(Me.Height)
        Dim tmy As Integer
        If my = 0 Then
            tmy = my
        ElseIf my < Me.Height / 2 Then
            tmy = Me.Height / 2 - Fix((Me.Height / 2 - my) * widthToHeightRatio)
        Else
            tmy = Me.Height / 2 + Fix(System.Convert.ToDouble(my - Me.Height / 2) * widthToHeightRatio)
        End If
        ' Retrieve updated angle based on rise over run.
        angle = (GetAngle(Me.Width / 2, Me.Height / 2, mx, tmy) - rotation) Mod 360
    End Sub

    Private Function GetAngle(ByVal x1 As Integer, ByVal y1 As Integer, ByVal x2 As Integer, ByVal y2 As Integer) As Double
        Dim degrees As Double

        ' Avoid divide by zero run values.
        If x2 - x1 = 0 Then
            If y2 > y1 Then
                degrees = 90
            Else
                degrees = 270
            End If
        Else
            ' Calculate angle from offset.
            Dim riseoverrun As Double = System.Convert.ToDouble(y2 - y1) / System.Convert.ToDouble(x2 - x1)
            Dim radians As Double = Math.Atan(riseoverrun)
            degrees = radians * (System.Convert.ToDouble(180) / Math.PI)

            ' Handle quadrant specific transformations.           
            If x2 - x1 < 0 OrElse y2 - y1 < 0 Then
                degrees += 180
            End If
            If x2 - x1 > 0 AndAlso y2 - y1 < 0 Then
                degrees -= 180
            End If
            If degrees < 0 Then
                degrees += 360
            End If
        End If
        Return degrees
    End Function
End Class

Public Class AngleEditorTestControl
    Inherits System.Windows.Forms.UserControl
    Private int_angle As Double

    <BrowsableAttribute(True), EditorAttribute(GetType(AngleEditor), GetType(System.Drawing.Design.UITypeEditor))> _
    Public Property Angle() As Double
        Get
            Return int_angle
        End Get
        Set(ByVal Value As Double)
            int_angle = Value
        End Set
    End Property

    Public Sub New()
        int_angle = 90
        Me.Size = New Size(190, 42)
        Me.BackColor = Color.Beige
    End Sub

    Protected Overrides Sub OnPaint(ByVal e As System.Windows.Forms.PaintEventArgs)
        If Me.DesignMode Then
            e.Graphics.DrawString("Use the Properties Window to access", New Font("Arial", 8), New SolidBrush(Color.Black), 3, 2)
            e.Graphics.DrawString("the AngleEditor UITypeEditor by", New Font("Arial", 8), New SolidBrush(Color.Black), 3, 14)
            e.Graphics.DrawString("configuring the ""Angle"" property.", New Font("Arial", 8), New SolidBrush(Color.Black), 3, 26)
        Else
            e.Graphics.DrawString("This example requires design mode.", New Font("Arial", 8), New SolidBrush(Color.Black), 3, 2)
        End If
    End Sub
End Class

Commenti

La UITypeEditor classe fornisce una classe di base che è possibile derivare ed estendere per implementare un editor di tipi personalizzato per l'ambiente della fase di progettazione.The UITypeEditor class provides a base class that you can derive from and extend to implement a custom type editor for the design-time environment. In genere, l'editor di tipi personalizzato interagisce PropertyGrid con il controllo.Typically, your custom type editor interacts with the PropertyGrid control.

Gli editor di tipi personalizzati sono utili in situazioni in cui un editor di valori della casella di testo non è sufficiente per la selezione efficace dei valori di determinati tipi.Custom type editors are useful in situations where a text-box value editor is insufficient to effectively select the values of certain types.

Per implementare un editor di tipi di interfaccia utente design-time personalizzato, è necessario eseguire i passaggi seguenti:To implement a custom design-time UI type editor, you must perform the following steps:

  • Definire una classe che deriva da UITypeEditor.Define a class that derives from UITypeEditor.

  • Eseguire l' EditValue override del metodo per gestire l'interfaccia utente, l'elaborazione dell'input utente e l'assegnazione di valori.Override the EditValue method to handle the user interface, user input processing, and value assignment.

  • Eseguire l' GetEditStyle override del metodo per indicare all'finestra Proprietà il tipo di stile dell'editor che l'editor utilizzerà.Override the GetEditStyle method to inform the Properties window of the type of editor style that the editor will use.

È possibile aggiungere ulteriore supporto per disegnare la rappresentazione di un valore nel Finestra Proprietà eseguendo i passaggi seguenti:You can add additional support for painting a value's representation in the Properties window by performing the following steps:

  • Eseguire l' GetPaintValueSupported override del metodo per indicare che l'editor supporta la visualizzazione della rappresentazione del valore.Override the GetPaintValueSupported method to indicate that the editor supports displaying the value's representation.

  • Eseguire l' PaintValue override del metodo per implementare la visualizzazione della rappresentazione del valore.Override the PaintValue method to implement the display of the value's representation.

  • Eseguire l' UITypeEditor override del metodo del costruttore se l'editor deve avere il comportamento di inizializzazione.Override the UITypeEditor constructor method if the editor should have initialization behavior.

Nota

La UITypeEditor classe non supporta i layout da destra a sinistra (RTL).The UITypeEditor class does not support right-to-left (RTL) layouts.

Per ulteriori informazioni sull'ottimizzazione del supporto in fase di progettazione, vedere estensione del supporto in fase di progettazione.For more information about enhancing design-time support, see Extending Design-Time Support. Per ulteriori informazioni sull'implementazione di UITypeEditor, vedere Cenni preliminari sugli editor di tipi di interfaccia utente.For more information on implementing a UITypeEditor, see User Interface Type Editors Overview.

Costruttori

UITypeEditor() UITypeEditor() UITypeEditor() UITypeEditor()

Inizializza una nuova istanza della classe UITypeEditor.Initializes a new instance of the UITypeEditor class.

Proprietà

IsDropDownResizable IsDropDownResizable IsDropDownResizable IsDropDownResizable

Ottiene un valore che indica se gli editor a discesa possono essere ridimensionati dall'utente.Gets a value indicating whether drop-down editors should be resizable by the user.

Metodi

EditValue(IServiceProvider, Object) EditValue(IServiceProvider, Object) EditValue(IServiceProvider, Object) EditValue(IServiceProvider, Object)

Modifica il valore dell'oggetto specificato, utilizzando lo stile dell'editor indicato dal metodo GetEditStyle().Edits the value of the specified object using the editor style indicated by the GetEditStyle() method.

EditValue(ITypeDescriptorContext, IServiceProvider, Object) EditValue(ITypeDescriptorContext, IServiceProvider, Object) EditValue(ITypeDescriptorContext, IServiceProvider, Object) EditValue(ITypeDescriptorContext, IServiceProvider, Object)

Modifica il valore dell'oggetto specificato utilizzando lo stile dell'editor indicato dal metodo GetEditStyle().Edits the specified object's value using the editor style indicated by the GetEditStyle() method.

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

Determina se l'oggetto specificato è uguale all'oggetto corrente.Determines whether the specified object is equal to the current object.

(Inherited from Object)
GetEditStyle() GetEditStyle() GetEditStyle() GetEditStyle()

Ottiene lo stile dell'editor utilizzato dal metodo EditValue(IServiceProvider, Object).Gets the editor style used by the EditValue(IServiceProvider, Object) method.

GetEditStyle(ITypeDescriptorContext) GetEditStyle(ITypeDescriptorContext) GetEditStyle(ITypeDescriptorContext) GetEditStyle(ITypeDescriptorContext)

Ottiene lo stile dell'editor utilizzato dal metodo EditValue(IServiceProvider, Object).Gets the editor style used by the EditValue(IServiceProvider, Object) method.

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

Funge da funzione hash predefinita.Serves as the default hash function.

(Inherited from Object)
GetPaintValueSupported() GetPaintValueSupported() GetPaintValueSupported() GetPaintValueSupported()

Indica se questo editor supporta la rappresentazione grafica del valore di un oggetto.Indicates whether this editor supports painting a representation of an object's value.

GetPaintValueSupported(ITypeDescriptorContext) GetPaintValueSupported(ITypeDescriptorContext) GetPaintValueSupported(ITypeDescriptorContext) GetPaintValueSupported(ITypeDescriptorContext)

Indica se il contesto specificato supporta la rappresentazione grafica del valore di un oggetto all'interno del contesto specificato.Indicates whether the specified context supports painting a representation of an object's value within the specified context.

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

Ottiene l'oggetto Type dell'istanza corrente.Gets the Type of the current instance.

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

Crea una copia superficiale dell'oggetto Object corrente.Creates a shallow copy of the current Object.

(Inherited from Object)
PaintValue(Object, Graphics, Rectangle) PaintValue(Object, Graphics, Rectangle) PaintValue(Object, Graphics, Rectangle) PaintValue(Object, Graphics, Rectangle)

Descrive graficamente il valore dell'oggetto specificato sulla superficie specificata.Paints a representation of the value of the specified object to the specified canvas.

PaintValue(PaintValueEventArgs) PaintValue(PaintValueEventArgs) PaintValue(PaintValueEventArgs) PaintValue(PaintValueEventArgs)

Descrive graficamente il valore di un oggetto utilizzando la classe PaintValueEventArgs specificata.Paints a representation of the value of an object using the specified PaintValueEventArgs.

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

Restituisce una stringa che rappresenta l'oggetto corrente.Returns a string that represents the current object.

(Inherited from Object)

Sicurezza

NamedPermissionSet
per l'accesso completo alle risorse di sistema.for full access to system resources. Valori della richiesta LinkDemand: InheritanceDemand,.Demand values: LinkDemand, InheritanceDemand. Stato associato:Associated state:

Si applica a

Vedi anche