RadioButtonRenderer Classe

Définition

public ref class RadioButtonRenderer sealed

public ref class RadioButtonRenderer abstract sealed

public sealed class RadioButtonRenderer

public static class RadioButtonRenderer

type RadioButtonRenderer = class

Public NotInheritable Class RadioButtonRenderer

Public Class RadioButtonRenderer

Héritage

Object

RadioButtonRenderer

Exemples

L’exemple de code suivant montre comment écrire un contrôle personnalisé qui utilise la DrawRadioButton méthode pour dessiner un bouton d’option qui répond aux clics de souris.

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

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

namespace RadioButtonRendererSample
{
    public ref class CustomRadioButton : public Control
    {
    private:
        Rectangle textRectangleValue;
    private:
        bool clicked;
    private:
        RadioButtonState state;

    public:
        CustomRadioButton() : Control()
        {
            textRectangleValue = Rectangle();
            state = RadioButtonState::UncheckedNormal;
            this->Location = Point(50, 50);
            this->Size = System::Drawing::Size(100, 20);
            this->Text = "Click here";
            this->Font = SystemFonts::IconTitleFont;
        }

        // Define the text bounds so that the text rectangle
        // does not include the radio button.
    public:
        property Rectangle TextRectangle
        {
            Rectangle get()
            {
                Graphics^ g = this->CreateGraphics();

                textRectangleValue.X = ClientRectangle.X +
                    RadioButtonRenderer::GetGlyphSize(g,
                    RadioButtonState::UncheckedNormal).Width;
                textRectangleValue.Y = ClientRectangle.Y;
                textRectangleValue.Width = ClientRectangle.Width -
                    RadioButtonRenderer::GetGlyphSize(g,
                    RadioButtonState::UncheckedNormal).Width;
                textRectangleValue.Height = ClientRectangle.Height;
             
                delete g;                

                return textRectangleValue;
            }
        }

        // Draw the radio button in the current state.
    protected:
        virtual void OnPaint(PaintEventArgs^ e) override
        {
            __super::OnPaint(e);

            RadioButtonRenderer::DrawRadioButton(e->Graphics,
                ClientRectangle.Location, TextRectangle, this->Text,
                this->Font, clicked, state);
        }

        // Draw the radio button in the checked or unchecked state.
    protected:
        virtual void OnMouseDown(MouseEventArgs^ e) override
        {
            __super::OnMouseDown(e);

            if (!clicked)
            {
                clicked = true;
                this->Text = "Clicked!";
                state = RadioButtonState::CheckedPressed;
                Invalidate();
            }
            else
            {
                clicked = false;
                this->Text = "Click here";
                state = RadioButtonState::UncheckedNormal;
                Invalidate();
            }
        }

        // Draw the radio button in the hot state.
    protected:
        virtual void OnMouseHover(EventArgs^ e) override
        {
            __super::OnMouseHover(e);
            state = clicked ? RadioButtonState::CheckedHot :
                RadioButtonState::UncheckedHot;
            Invalidate();
        }

        // Draw the radio button in the hot state.
    protected:
        virtual void OnMouseUp(MouseEventArgs^ e) override
        {
            __super::OnMouseUp(e);
            this->OnMouseHover(e);
        }

        // Draw the radio button in the normal (i.e. not hot) state
    protected:
        virtual void OnMouseLeave(EventArgs^ e) override
        {
            __super::OnMouseLeave(e);
            state = clicked ? RadioButtonState::CheckedNormal :
                RadioButtonState::UncheckedNormal;
            Invalidate();
        }
    };

    public ref class Form1 : public Form
    {
    public:
        Form1() : Form()
        {
            Controls->Add(gcnew CustomRadioButton());

            if (Application::RenderWithVisualStyles)
            {
                this->Text = "Visual Styles Enabled";
            }
            else
            {
                this->Text = "Visual Styles Disabled";
            }
        }
    };
}

[STAThread]
int main()
{
    // If you do not call EnableVisualStyles below, then
    // RadioButtonRenderer.DrawRadioButton automatically detects
    // this and draws the radio button without visual styles.
    Application::EnableVisualStyles();
    Application::Run(gcnew RadioButtonRendererSample::Form1());
}

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

namespace RadioButtonRendererSample
{
    class Form1 : Form
    {
        Button button1 = new Button();
        public Form1()
            : base()
        {
            CustomRadioButton RadioButton1 = new CustomRadioButton();
          
            button1.Location = new System.Drawing.Point(175, 231);
            button1.Size = new System.Drawing.Size(105, 23);
            button1.Text = "Toggle Style";
            button1.Click += new System.EventHandler(this.button1_Click);
            Controls.Add(RadioButton1);
            Controls.Add(button1);

            if (Application.RenderWithVisualStyles)
                this.Text = "Visual Styles Enabled";
            else
                this.Text = "Visual Styles Disabled";
        }

        [STAThread]
        static void Main()
        {
            // If you do not call EnableVisualStyles below, then 
            // RadioButtonRenderer.DrawRadioButton automatically detects 
            // this and draws the radio button without visual styles.
            Application.EnableVisualStyles();
            Application.Run(new Form1());
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Application.VisualStyleState =
                Application.VisualStyleState ^
                VisualStyleState.ClientAndNonClientAreasEnabled;

            GroupBoxRenderer.RenderMatchingApplicationState = true;
            if (Application.RenderWithVisualStyles)
                this.Text = "Visual Styles Enabled";
            else
                this.Text = "Visual Styles Disabled";
        }
    }

    public class CustomRadioButton : Control
    {
        private Rectangle textRectangleValue = new Rectangle();
        private bool clicked = false;
        private RadioButtonState state = RadioButtonState.UncheckedNormal;

        public CustomRadioButton()
            : base()
        {
            this.Location = new Point(50, 50);
            this.Size = new Size(100, 20);
            this.Text = "Click here";
            this.Font = SystemFonts.IconTitleFont;
        }

        // Define the text bounds so that the text rectangle 
        // does not include the radio button.
        public Rectangle TextRectangle
        {
            get
            {
                using (Graphics g = this.CreateGraphics())
                {
                    textRectangleValue.X = ClientRectangle.X +
                        RadioButtonRenderer.GetGlyphSize(g,
                        RadioButtonState.UncheckedNormal).Width;
                    textRectangleValue.Y = ClientRectangle.Y;
                    textRectangleValue.Width = ClientRectangle.Width -
                        RadioButtonRenderer.GetGlyphSize(g,
                        RadioButtonState.UncheckedNormal).Width;
                    textRectangleValue.Height = ClientRectangle.Height;
                }

                return textRectangleValue;
            }
        }

        // Draw the radio button in the current state.
        protected override void OnPaint(PaintEventArgs e)
        {
            base.OnPaint(e);

            RadioButtonRenderer.DrawRadioButton(e.Graphics,
                ClientRectangle.Location, TextRectangle, this.Text,
                this.Font, clicked, state);
        }

        // Draw the radio button in the checked or unchecked state.
        protected override void OnMouseDown(MouseEventArgs e)
        {
            base.OnMouseDown(e);

            if (!clicked)
            {
                clicked = true;
                this.Text = "Clicked!";
                state = RadioButtonState.CheckedPressed;
                Invalidate();
            }
            else
            {
                clicked = false;
                this.Text = "Click here";
                state = RadioButtonState.UncheckedNormal;
                Invalidate();
            }
        }

        // Draw the radio button in the hot state.
        protected override void OnMouseHover(EventArgs e)
        {
            base.OnMouseHover(e);
            state = clicked ? RadioButtonState.CheckedHot :
                RadioButtonState.UncheckedHot;
            Invalidate();
        }

        // Draw the radio button in the hot state.
        protected override void OnMouseUp(MouseEventArgs e)
        {
            base.OnMouseUp(e);
            this.OnMouseHover(e);
        }

        // Draw the radio button in the unpressed state.
        protected override void OnMouseLeave(EventArgs e)
        {
            base.OnMouseLeave(e);
            state = clicked ? RadioButtonState.CheckedNormal :
                RadioButtonState.UncheckedNormal;
            Invalidate();
        }
    }
}

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

Namespace RadioButtonRendererSample

    Class Form1
        Inherits Form

        Dim WithEvents button1 As Button

        Public Sub New()
            Dim RadioButton1 As New CustomRadioButton()
            button1 = New Button
            Me.button1.Location = New System.Drawing.Point(185, 231)
            Me.button1.Size = New System.Drawing.Size(105, 23)
            Me.button1.Text = "Toggle Styles"
            Controls.Add(RadioButton1)
            Controls.Add(button1)

            If Application.RenderWithVisualStyles Then
                Me.Text = "Visual Styles Enabled"
            Else
                Me.Text = "Visual Styles Disabled"
            End If
        End Sub

        <STAThread()> _
        Shared Sub Main()
            ' If you do not call EnableVisualStyles below, then 
            ' RadioButtonRenderer.DrawRadioButton automatically detects 
            ' this and draws the radio button without visual styles.
            Application.EnableVisualStyles()
            Application.Run(New Form1())
        End Sub

        ' Match application style and toggle visual styles off
        ' and on for the application.
        Private Sub button1_Click(ByVal sender As Object, ByVal e As EventArgs) _
            Handles button1.Click

            RadioButtonRenderer.RenderMatchingApplicationState = True

            Application.VisualStyleState = _
                Application.VisualStyleState Xor _
                VisualStyleState.ClientAndNonClientAreasEnabled

            If Application.RenderWithVisualStyles Then
                Me.Text = "Visual Styles Enabled"
            Else
                Me.Text = "Visual Styles Disabled"
            End If

        End Sub
    End Class

    Public Class CustomRadioButton
        Inherits Control

        Private textRectangleValue As New Rectangle()
        Private clicked As Boolean = False
        Private state As RadioButtonState = RadioButtonState.UncheckedNormal

        Public Sub New()
            With Me
                .Location = New Point(50, 50)
                .Size = New Size(100, 20)
                .Text = "Click here"
                .Font = SystemFonts.IconTitleFont
            End With
        End Sub

        ' Define the text bounds so that the text rectangle 
        ' does not include the radio button.
        Public ReadOnly Property TextRectangle() As Rectangle
            Get
                Using g As Graphics = Me.CreateGraphics()
                    With textRectangleValue
                        .X = Me.ClientRectangle.X + _
                            RadioButtonRenderer.GetGlyphSize(g, _
                            RadioButtonState.UncheckedNormal).Width
                        .Y = Me.ClientRectangle.Y
                        .Width = Me.ClientRectangle.Width - _
                            RadioButtonRenderer.GetGlyphSize(g, _
                            RadioButtonState.UncheckedNormal).Width
                        .Height = Me.ClientRectangle.Height
                    End With
                End Using
                Return textRectangleValue
            End Get
        End Property

        ' Draw the radio button in the current state.
        Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs)
            MyBase.OnPaint(e)
            RadioButtonRenderer.DrawRadioButton(e.Graphics, _
                Me.ClientRectangle.Location, TextRectangle, Me.Text, _
                Me.Font, clicked, state)
        End Sub

        ' Draw the radio button in the checked or unchecked state.
        Protected Overrides Sub OnMouseDown(ByVal e As MouseEventArgs)
            MyBase.OnMouseDown(e)

            If Not clicked Then
                clicked = True
                Me.Text = "Clicked!"
                state = RadioButtonState.CheckedPressed
                Invalidate()
            Else
                clicked = False
                Me.Text = "Click here"
                state = RadioButtonState.UncheckedNormal
                Invalidate()
            End If

        End Sub

        ' Draw the radio button in the hot state. 
        Protected Overrides Sub OnMouseHover(ByVal e As EventArgs)
            MyBase.OnMouseHover(e)

            If clicked Then
                state = RadioButtonState.CheckedHot
            Else
                state = RadioButtonState.UncheckedHot
            End If
            Invalidate()
        End Sub

        ' Draw the radio button in the hot state.
        Protected Overrides Sub OnMouseUp(ByVal e As MouseEventArgs)
            MyBase.OnMouseUp(e)
            Me.OnMouseHover(e)
        End Sub

        ' Draw the radio button in the unpressed state.
        Protected Overrides Sub OnMouseLeave(ByVal e As EventArgs)
            MyBase.OnMouseLeave(e)

            If clicked Then
                state = RadioButtonState.CheckedNormal
            Else
                state = RadioButtonState.UncheckedNormal
            End If
            Invalidate()
        End Sub

    End Class
End Namespace

Remarques

La RadioButtonRenderer classe fournit un ensemble de static méthodes qui peuvent être utilisées pour afficher un contrôle de bouton d’option. Le rendu d’un contrôle fait référence au dessin de l’interface utilisateur d’un contrôle. Pour dessiner un bouton d’option, utilisez l’une des DrawRadioButton méthodes. Ces méthodes fournissent diverses options, telles que le dessin de texte ou une image avec le bouton d’option.

Si les styles visuels sont activés dans le système d’exploitation et que les styles visuels sont appliqués à l’application actuelle, DrawRadioButton dessine le bouton d’option avec le style visuel actuel. Sinon, DrawRadioButton dessine le bouton d’option avec le style Windows classique. Cela est utile si vous dessinez un contrôle personnalisé qui doit correspondre automatiquement au paramètre de style visuel actuel du système d’exploitation.

Cette classe encapsule les fonctionnalités d’un System.Windows.Forms.VisualStyles.VisualStyleRenderer élément défini sur l’un des éléments exposés par la System.Windows.Forms.VisualStyles.VisualStyleElement.Button.RadioButton classe. Pour plus d’informations, consultez Rendu des contrôles avec les styles visuels.

Propriétés

Méthodes

S’applique à

Voir aussi

• EnableVisualStyles()
• VisualStyleState
• VisualStyleRenderer
• VisualStyleElement