UITypeEditor Třída

Definice

Obor názvů:: System.Drawing.Design

Sestavení:: System.Drawing.dll

Sestavení:: System.Drawing.dll, System.Windows.Forms.dll

Sestavení:: System.Windows.Forms.dll

Zdroj:: UITypeEditor.cs

Zdroj:: UITypeEditor.cs

Zdroj:: UITypeEditor.cs

Zdroj:: UITypeEditor.cs

Zdroj:: UITypeEditor.cs

Důležité

Některé informace platí pro předběžně vydaný produkt, který se může zásadně změnit, než ho výrobce nebo autor vydá. Microsoft neposkytuje žádné záruky, výslovné ani předpokládané, týkající se zde uváděných informací.

Poskytuje základní třídu, kterou lze použít k návrhu editorů hodnot, které mohou poskytnout uživatelské rozhraní pro reprezentaci a úpravu hodnot objektů podporovaných datových typů.

public ref class UITypeEditor

public class UITypeEditor

type UITypeEditor = class

Public Class UITypeEditor

Dědičnost: Object
UITypeEditor

Odvozené: System.ComponentModel.Design.BinaryEditor

System.ComponentModel.Design.CollectionEditor

System.ComponentModel.Design.DateTimeEditor

System.ComponentModel.Design.MultilineStringEditor

System.ComponentModel.Design.ObjectSelectorEditor

Více…

Příklady

Následující příklad kódu ukazuje, že UITypeEditor lze přidružit k celočíselné, dvojité nebo plovoucí vlastnosti pomocí EditorAttribute poskytnout úhlové výběrové rozhraní z okno Vlastnosti v režimu návrhu. Tento příklad používá rozhraní IWindowsFormsEditorService k zobrazení rozevíracího ovládacího prvku v okno Vlastnosti v režimu návrhu. Zkompilujte kód a přidejte sestavení do sady nástrojů pomocí příkazu Customize Toolbox v nabídce Tools Visual Studio. Vytvořte instanci AngleTestControl a klikněte na rozevírací tlačítko vedle vlastnosti Angle v okno Vlastnosti a nakonfigurujte vlastnost pomocí editoru.

#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.
    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

Poznámky

Třída UITypeEditor poskytuje základní třídu, ze které můžete odvodit a rozšířit o implementaci vlastního editoru typů pro prostředí návrhu. Editor vlastních typů obvykle pracuje s ovládacím PropertyGrid prvku.

Editory vlastních typů jsou užitečné v situacích, kdy editor hodnot textového pole nestačí k efektivnímu výběru hodnot určitých typů.

Pokud chcete implementovat vlastní editor typů uživatelského rozhraní návrhu, musíte provést následující kroky:

Definujte třídu, která je odvozena od UITypeEditor.
Přepište metodu EditValue pro zpracování uživatelského rozhraní, zpracování vstupu uživatele a přiřazení hodnoty.
Přepište metodu GetEditStyle, která informuje okno Vlastnosti o typu stylu editoru, který bude editor používat.

Další podporu pro malování reprezentace hodnoty v okno Vlastnosti můžete přidat provedením následujících kroků:

Přepište metodu GetPaintValueSupported , která označuje, že editor podporuje zobrazení reprezentace hodnoty.
Přepište metodu PaintValue pro implementaci zobrazení reprezentace hodnoty.
Přepište metodu konstruktoru UITypeEditor , pokud editor by měl mít inicializační chování.

Poznámka:

Třída UITypeEditor nepodporuje rozložení zprava doleva (RTL).

Konstruktory

Name	Description
UITypeEditor()	Inicializuje novou instanci UITypeEditor třídy.

Vlastnosti

Name	Description
IsDropDownResizable	Získá hodnotu označující, zda má uživatel měnit velikost rozevíracích editorů.

Metody

Name	Description
EditValue(IServiceProvider, Object)	Upraví hodnotu zadaného objektu pomocí stylu editoru označeného metodou GetEditStyle() .
EditValue(ITypeDescriptorContext, IServiceProvider, Object)	Upraví hodnotu zadaného objektu pomocí stylu editoru označeného metodou GetEditStyle() .
Equals(Object)	Určí, zda se zadaný objekt rovná aktuálnímu objektu. (Zděděno od Object)
GetEditStyle()	Získá styl editoru používaný metodou EditValue(IServiceProvider, Object) .
GetEditStyle(ITypeDescriptorContext)	Získá styl editoru používaný metodou EditValue(IServiceProvider, Object) .
GetHashCode()	Slouží jako výchozí funkce hash. (Zděděno od Object)
GetPaintValueSupported()	Určuje, zda tento editor podporuje malování reprezentace hodnoty objektu.
GetPaintValueSupported(ITypeDescriptorContext)	Určuje, zda zadaný kontext podporuje obraz reprezentace hodnoty objektu v zadaném kontextu.
GetType()	Získá Type aktuální instance. (Zděděno od Object)
MemberwiseClone()	Vytvoří mělkou kopii aktuálního Object. (Zděděno od Object)
PaintValue(Object, Graphics, Rectangle)	Nakreslí reprezentaci hodnoty zadaného objektu na určené plátno.
PaintValue(PaintValueEventArgs)	Maluje reprezentaci hodnoty objektu pomocí zadaného PaintValueEventArgs.
ToString()	Vrátí řetězec, který představuje aktuální objekt. (Zděděno od Object)

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