UITypeEditor Class

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.

Namespace: System.Drawing.Design
Assembly: System.Drawing (in system.drawing.dll)

'Declaration
Public Class UITypeEditor
'Usage
Dim instance As UITypeEditor

public class UITypeEditor
public class UITypeEditor
Not applicable.

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. Typically, your custom type editor interacts with the PropertyGrid control.

Custom type editors are useful in situations where a text-box value editor is insufficient to effectively select the values of certain types.

To implement a custom design-time UI type editor, you must perform the following steps:

  • Define a class that derives from UITypeEditor.

  • Override the EditValue method to handle the user interface, user input processing, and value assignment.

  • Override the GetEditStyle method to inform the Properties window of the type of editor style that the editor will use.

You can add additional support for painting a value's representation in the Properties window by performing the following steps:

  • Override the GetPaintValueSupported method to indicate that the editor supports displaying the value's representation.

  • Override the PaintValue method to implement the display of the value's representation.

  • Override the UITypeEditor constructor method if the editor should have initialization behavior.

NoteNote:

The UITypeEditor class does not support right-to-left (RTL) layouts.

For more information about enhancing design-time support, see Extending Design-Time Support. For more information on implementing a UITypeEditor, see User Interface Type Editors Overview.

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. This example uses the IWindowsFormsEditorService interface to display a drop-down control in the Properties window in design mode. Compile the code and add the assembly to the Toolbox using the Customize Toolbox command on the Tools menu of Visual Studio. 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.

Option Strict Off
Imports System
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


package AngleEditor; 

import System.*;
import System.ComponentModel.*;
import System.Drawing.*;
import System.Drawing.Design.*;
import System.Windows.Forms.*;
import System.Windows.Forms.Design.*;
import System.Security.Permissions.*;

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

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

    // Displays the UI for value selection.
    public 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().Equals(double.class.ToType()) 
            && !value.GetType().Equals(float.class.ToType()) 
            && !value.GetType().Equals(int.class.ToType())) {
            
            return value;
        }

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

            // Return the value in the appropraite data format.
            if (value.GetType().Equals(double.class.ToType())) {
                return (System.Double)(angleControl.angle);
            }
            else {
                if (value.GetType().Equals(float.class.ToType())) {
                    return (System.Single)(angleControl.angle);
                }
                else {
                    if (value.GetType().Equals(int.class.ToType())) {
                        return (Int32)(angleControl.angle);
                    }
                }
            }
        }
        return value;
    } //EditValue

    // Draws a representation of the property's value.
    public void PaintValue(System.Drawing.Design.PaintValueEventArgs e)
    {
        int normalX = e.get_Bounds().get_Width() / 2;
        int normalY = e.get_Bounds().get_Height() / 2;

        // Fill background and ellipse and center point.
        e.get_Graphics().FillRectangle(new SolidBrush(Color.get_DarkBlue()), 
            e.get_Bounds().get_X(), e.get_Bounds().get_Y(),
            e.get_Bounds().get_Width(), e.get_Bounds().get_Height());
        e.get_Graphics().FillEllipse(new SolidBrush(Color.get_White()), 
            e.get_Bounds().get_X() + 1, e.get_Bounds().get_Y() + 1, 
            e.get_Bounds().get_Width() - 3, e.get_Bounds().get_Height() - 3);
        e.get_Graphics().FillEllipse(new SolidBrush(Color.get_SlateGray()), 
            normalX + e.get_Bounds().get_X() - 1, 
            normalY + e.get_Bounds().get_Y() - 1, 3, 3);

        // Draw line along the current angle.
        double radians = (double)(System.Double)(e.get_Value()) 
            * System.Math.PI / (double)(180);
        e.get_Graphics().DrawLine(new Pen(new SolidBrush(Color.get_Red()), 1),
            normalX + e.get_Bounds().get_X(), 
            normalY + e.get_Bounds().get_Y(), 
            e.get_Bounds().get_X() 
            + (normalX + (int)((double)(normalX) * System.Math.Cos(radians))), 
            e.get_Bounds().get_Y() 
            + (normalY + (int)((double)(normalY) * System.Math.Sin(radians))));
    } //PaintValue

    // Indicates whether the UITypeEditor supports painting a 
    // representation of a property's value.
    public boolean GetPaintValueSupported(
        System.ComponentModel.ITypeDescriptorContext context)
    {
        return true;
    } //GetPaintValueSupported
} //AngleEditor
   
// Provides a user interface for adjusting an angle value.
class AngleControl extends 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 initialAngle)
    {
        this.angle = initialAngle;
        this.SetStyle(ControlStyles.OptimizedDoubleBuffer 
            | ControlStyles.AllPaintingInWmPaint, true);
    } //AngleControl

    protected void OnPaint(System.Windows.Forms.PaintEventArgs e)
    {
        // Set angle origin point at center of control.
        int originX = this.get_Width() / 2;
        int originY = this.get_Height() / 2;

        // Fill background and ellipse and center point.
        e.get_Graphics().FillRectangle(new SolidBrush(Color.get_DarkBlue()), 
            0, 0, this.get_Width(), this.get_Height());
        e.get_Graphics().FillEllipse(new SolidBrush(Color.get_White()), 1, 1, 
            this.get_Width() - 3, this.get_Height() - 3);
        e.get_Graphics().FillEllipse(new SolidBrush(Color.get_SlateGray()), 
            originX - 1, originY - 1, 3, 3);

        // Draw angle markers.
        int startAngle = (270 - rotation) % 360;
        e.get_Graphics().DrawString(System.Convert.ToString(startAngle), 
            new Font("Arial", 8), new SolidBrush(Color.get_DarkGray()), 
            this.get_Width() / 2 - 10, 10);
        startAngle = (startAngle + 90) % 360;
        e.get_Graphics().DrawString(System.Convert.ToString(startAngle), 
            new Font("Arial", 8), new SolidBrush(Color.get_DarkGray()), 
            this.get_Width() - 18, this.get_Height() / 2 - 6);
        startAngle = (startAngle + 90) % 360;
        e.get_Graphics().DrawString(System.Convert.ToString(startAngle), 
            new Font("Arial", 8), new SolidBrush(Color.get_DarkGray()), 
            this.get_Width() / 2 - 6, this.get_Height() - 18);
        startAngle = (startAngle + 90) % 360;
        e.get_Graphics().DrawString(System.Convert.ToString(startAngle), 
            new Font("Arial", 8), new SolidBrush(Color.get_DarkGray()), 10, 
            this.get_Height() / 2 - 6);

        // Draw line along the current angle.         
        double radians = ((angle + rotation + 360) % 360) * System.Math.PI 
            / (double)180;
        e.get_Graphics().DrawLine(new Pen(new SolidBrush(Color.get_Red()), 1), 
            originX, originY, 
            originX + (int)((double)(originX) * (double)
            (System.Math.Cos(radians))), originY + (int)((double)(originY) 
            * (double)(System.Math.Sin(radians))));

        // Output angle information.
        e.get_Graphics().FillRectangle(new SolidBrush(Color.get_Gray()), 
            this.get_Width() - 84, 3, 82, 13);
        e.get_Graphics().DrawString("Angle: " + System.Convert.ToString(angle), 
            new Font("Arial", 8), new SolidBrush(Color.get_Yellow()), 
            this.get_Width() - 84, 2);

        // Draw square at mouse position of last angle adjustment.
        e.get_Graphics().DrawRectangle(new Pen(new SolidBrush(
            Color.get_Black()), 1), dbX - 2, dbY - 2, 4, 4);

        // Draw rotation adjustment buttons.
        if (overButton == 1) {
            e.get_Graphics().FillRectangle(new SolidBrush(Color.get_Green()), 
                this.get_Width() - 28, this.get_Height() - 14, 12, 12);
            e.get_Graphics().FillRectangle(new SolidBrush(Color.get_Gray()), 2, 
                this.get_Height() - 13, 110, 12);
            e.get_Graphics().DrawString("Rotate 90 degrees left", 
                new Font("Arial", 8), new SolidBrush(Color.get_White()), 2, 
                this.get_Height() - 14);
        }
        else {
            e.get_Graphics().FillRectangle(
                new SolidBrush(Color.get_DarkGreen()), 
                this.get_Width() - 28, this.get_Height() - 14, 12, 12);
        }
        if (overButton == 2) {
            e.get_Graphics().FillRectangle(new SolidBrush(Color.get_Green()), 
                this.get_Width() - 14, this.get_Height() - 14, 12, 12);
            e.get_Graphics().FillRectangle(new SolidBrush(Color.get_Gray()), 2, 
                this.get_Height() - 13, 116, 12);
            e.get_Graphics().DrawString("Rotate 90 degrees right", 
                new Font("Arial", 8), new SolidBrush(Color.get_White()), 2, 
                this.get_Height() - 14);
        }
        else {
            e.get_Graphics().FillRectangle(
                new SolidBrush(Color.get_DarkGreen()), 
                this.get_Width() - 14, this.get_Height() - 14, 12, 12);
        }

        e.get_Graphics().DrawEllipse(new Pen(new SolidBrush(Color.get_White()),
            1), this.get_Width() - 11, this.get_Height() - 11, 6, 6);
        e.get_Graphics().DrawEllipse(new Pen(new SolidBrush(Color.get_White()),
            1), this.get_Width() - 25, this.get_Height() - 11, 6, 6);
        
        if (overButton == 1) {
            e.get_Graphics().FillRectangle(new SolidBrush(Color.get_Green()), 
                this.get_Width() - 25, this.get_Height() - 6, 4, 4);
        }
        else {
            e.get_Graphics().FillRectangle(new SolidBrush(Color.get_DarkGreen()), 
                this.get_Width() - 25, this.get_Height() - 6, 4, 4);
        }
        if (overButton == 2) {
            e.get_Graphics().FillRectangle(new SolidBrush(Color.get_Green()), 
                this.get_Width() - 8, this.get_Height() - 6, 4, 4);
        }
        else {
            e.get_Graphics().FillRectangle(new SolidBrush(Color.get_DarkGreen()), 
                this.get_Width() - 8, this.get_Height() - 6, 4, 4);
        }

        e.get_Graphics().FillPolygon(new SolidBrush(Color.get_White()), 
            new Point[] { 
            new Point(this.get_Width() - 7, this.get_Height() - 8), 
            new Point(this.get_Width() - 3, this.get_Height() - 8), 
            new Point(this.get_Width() - 5, this.get_Height() - 4) });
        e.get_Graphics().FillPolygon(new SolidBrush(Color.get_White()), 
            new Point[] { 
            new Point(this.get_Width() - 26, this.get_Height() - 8), 
            new Point(this.get_Width() - 21, this.get_Height() - 8), 
            new Point(this.get_Width() - 25, this.get_Height() - 4) });
    } //OnPaint

    protected void OnMouseDown(System.Windows.Forms.MouseEventArgs e)
    {
        // Handle rotation adjustment button clicks.
        if (e.get_X() >= this.get_Width() - 28 
            && e.get_X() <= this.get_Width() - 2 
            && e.get_Y() >= this.get_Height() - 14 
            && e.get_Y() <= this.get_Height() - 2) {
            
            if (e.get_X() <= this.get_Width() - 16) {
                rotation -= 90;
            }
            else {
                if (e.get_X() >= this.get_Width() - 14) {
                    rotation += 90;
                }
            }
            if (rotation < 0) {
                rotation += 360;
            }
            rotation = rotation % 360;
            dbX = -10;
            dbY = -10;
        }
        else {
            UpdateAngle(e.get_X(), e.get_Y());
        }
        this.Refresh();
    } //OnMouseDown

    protected void OnMouseMove(System.Windows.Forms.MouseEventArgs e)
    {
        if (e.get_Button().Equals(MouseButtons.Left)) {
            UpdateAngle(e.get_X(), e.get_Y());
            overButton = -1;
        }
        else {
            if (e.get_X() >= this.get_Width() - 28 
                && e.get_X() <= this.get_Width() - 16 
                && e.get_Y() >= this.get_Height() - 14 
                && e.get_Y() <= this.get_Height() - 2) {
                
                overButton = 1;
            }
            else {
                if (e.get_X() >= this.get_Width() - 14 
                    && e.get_X() <= this.get_Width() - 2 
                    && e.get_Y() >= this.get_Height() - 14 
                    && e.get_Y() <= this.get_Height() - 2) {
                    
                    overButton = 2;
                }
                else {
                    overButton = -1;
                }
            }
        }
        this.Refresh();
    } //OnMouseMove

    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.get_Width()) / (double)(this.get_Height());
        int tmY;
        if (mY == 0) {
            tmY = mY;
        }
        else {
            if (mY < this.get_Height() / 2) {
                tmY = this.get_Height() / 2 
                    - (int)((this.get_Height() / 2 - mY) * widthToHeightRatio);
            }
            else {
                tmY = this.get_Height() / 2 + (int)((double)
                    (mY - this.get_Height() / 2) * widthToHeightRatio);
            }
        } 
        // Retrieve updated angle based on rise over run.
        angle = (GetAngle(this.get_Width() / 2, this.get_Height() / 2, mX, 
            tmY) - rotation) % 360;
    } //UpdateAngle

    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 = System.Math.Atan(riseOverRun);
            degrees = radians * (double)(180) / System.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;
    } //GetAngle
} //AngleControl
   
public class AngleEditorTestControl extends System.Windows.Forms.UserControl
{
    private double intAngle;

    /** @attribute BrowsableAttribute(true)
     */
    /** @attribute EditorAttribute(AngleEditor.class, 
        System.Drawing.Design.UITypeEditor.class)
     */
    /** @property 
     */
    public double get_Angle()
    {
        return intAngle;
    } //get_Angle

    /** @property 
     */
    public void set_Angle(double value)
    {
        intAngle = value;
    } //set_Angle

    public AngleEditorTestControl()
    {
        intAngle = 90;
        this.set_Size(new Size(190, 42));
        this.set_BackColor(Color.get_Beige());
    } //AngleEditorTestControl

    protected void OnPaint(System.Windows.Forms.PaintEventArgs e)
    {
        if (this.get_DesignMode()) {
            e.get_Graphics().DrawString("Use the Properties Window to access", 
                new Font("Arial", 8), new SolidBrush(Color.get_Black()), 3, 2);
            e.get_Graphics().DrawString("the AngleEditor UITypeEditor by", 
                new Font("Arial", 8), new SolidBrush(Color.get_Black()), 3, 14);
            e.get_Graphics().DrawString("configuring the \"Angle\" property.", 
                new Font("Arial", 8), new SolidBrush(Color.get_Black()), 3, 26);
        }
        else {
            e.get_Graphics().DrawString("This example requires design mode.", 
                new Font("Arial", 8), new SolidBrush(Color.get_Black()), 3, 2);
        }
    } //OnPaint
} //AngleEditorTestControl

System.Object
  System.Drawing.Design.UITypeEditor
     Derived Classes

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

Community Additions

ADD
Show: