RadioButtonRenderer RadioButtonRenderer RadioButtonRenderer RadioButtonRenderer Class

定义

提供用于呈现带/不带视觉样式的选项按钮控件(也称为单选按钮)的方法。Provides methods used to render an option button control (also known as a radio button) with or without visual styles. 此类不能被继承。This class cannot be inherited.

public ref class RadioButtonRenderer sealed
public sealed class RadioButtonRenderer
type RadioButtonRenderer = class
Public NotInheritable Class RadioButtonRenderer
继承
RadioButtonRendererRadioButtonRendererRadioButtonRendererRadioButtonRenderer

示例

下面的代码示例演示如何编写一个自定义控件, 该控件DrawRadioButton使用方法绘制一个用于响应鼠标单击的选项按钮。The following code example demonstrates how to write a custom control that uses the DrawRadioButton method to draw an option button that responds to mouse clicks.

#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

注解

类提供一static组可用于呈现选项按钮控件的方法。 RadioButtonRendererThe RadioButtonRenderer class provides a set of static methods that can be used to render an option button control. 呈现控件是指绘制控件的用户界面。Rendering a control refers to drawing the user interface of a control. 若要绘制选项按钮, 请使用其中一DrawRadioButton种方法。To draw an option button, use one of the DrawRadioButton methods. 这些方法提供了各种选项, 如使用选项按钮绘制文本或图像。These methods provide a variety of options, such as drawing text or an image with the option button.

如果在操作系统中启用了视觉样式, 并将视觉样式应用于当前应用程序, DrawRadioButton将绘制具有当前视觉样式的选项按钮。If visual styles are enabled in the operating system and visual styles are applied to the current application, DrawRadioButton will draw the option button with the current visual style. 否则, DrawRadioButton将绘制带有经典 Windows 样式的选项按钮。Otherwise, DrawRadioButton will draw the option button with the classic Windows style. 如果要绘制的自定义控件应自动匹配操作系统的当前视觉样式设置, 这将很有用。This is useful if you are drawing a custom control that should automatically match the current visual style setting of the operating system.

此类包装设置为System.Windows.Forms.VisualStyles.VisualStyleRenderer System.Windows.Forms.VisualStyles.VisualStyleElement.Button.RadioButton类公开的元素之一的的功能。This class wraps the functionality of a System.Windows.Forms.VisualStyles.VisualStyleRenderer that is set to one of the elements exposed by the System.Windows.Forms.VisualStyles.VisualStyleElement.Button.RadioButton class. 有关详细信息,请参阅使用视觉样式呈现控件For more information, see Rendering Controls with Visual Styles.

属性

RenderMatchingApplicationState RenderMatchingApplicationState RenderMatchingApplicationState RenderMatchingApplicationState

获取或设置一个值,该值指示呈现器是否使用应用程序状态来确定呈现样式。Gets or sets a value indicating whether the renderer uses the application state to determine rendering style.

方法

DrawParentBackground(Graphics, Rectangle, Control) DrawParentBackground(Graphics, Rectangle, Control) DrawParentBackground(Graphics, Rectangle, Control) DrawParentBackground(Graphics, Rectangle, Control)

在指定区域中绘制控件的父级的背景。Draws the background of a control's parent in the specified area.

DrawRadioButton(Graphics, Point, RadioButtonState) DrawRadioButton(Graphics, Point, RadioButtonState) DrawRadioButton(Graphics, Point, RadioButtonState) DrawRadioButton(Graphics, Point, RadioButtonState)

在指定状态下和指定位置绘制选项按钮控件(也称为单选按钮)。Draws an option button control (also known as a radio button) in the specified state and location.

DrawRadioButton(Graphics, Point, Rectangle, String, Font, Boolean, RadioButtonState) DrawRadioButton(Graphics, Point, Rectangle, String, Font, Boolean, RadioButtonState) DrawRadioButton(Graphics, Point, Rectangle, String, Font, Boolean, RadioButtonState) DrawRadioButton(Graphics, Point, Rectangle, String, Font, Boolean, RadioButtonState)

在指定状态下和指定位置,用指定文本和可选的聚焦框绘制选项按钮控件(也称为单选按钮)。Draws an option button control (also known as a radio button) in the specified state and location, with the specified text, and with an optional focus rectangle.

DrawRadioButton(Graphics, Point, Rectangle, String, Font, Image, Rectangle, Boolean, RadioButtonState) DrawRadioButton(Graphics, Point, Rectangle, String, Font, Image, Rectangle, Boolean, RadioButtonState) DrawRadioButton(Graphics, Point, Rectangle, String, Font, Image, Rectangle, Boolean, RadioButtonState) DrawRadioButton(Graphics, Point, Rectangle, String, Font, Image, Rectangle, Boolean, RadioButtonState)

在指定状态下和指定位置,用指定文本和图像以及可选的聚焦框,绘制选项按钮控件(也称为单选按钮)。Draws an option button control (also known as a radio button) in the specified state and location, with the specified text and image, and with an optional focus rectangle.

DrawRadioButton(Graphics, Point, Rectangle, String, Font, TextFormatFlags, Boolean, RadioButtonState) DrawRadioButton(Graphics, Point, Rectangle, String, Font, TextFormatFlags, Boolean, RadioButtonState) DrawRadioButton(Graphics, Point, Rectangle, String, Font, TextFormatFlags, Boolean, RadioButtonState) DrawRadioButton(Graphics, Point, Rectangle, String, Font, TextFormatFlags, Boolean, RadioButtonState)

在指定状态下和指定位置,用指定文本和文本格式以及可选的聚焦框,绘制选项按钮控件(也称为单选按钮)。Draws an option button control (also known as a radio button) in the specified state and location, with the specified text and text formatting, and with an optional focus rectangle.

DrawRadioButton(Graphics, Point, Rectangle, String, Font, TextFormatFlags, Image, Rectangle, Boolean, RadioButtonState) DrawRadioButton(Graphics, Point, Rectangle, String, Font, TextFormatFlags, Image, Rectangle, Boolean, RadioButtonState) DrawRadioButton(Graphics, Point, Rectangle, String, Font, TextFormatFlags, Image, Rectangle, Boolean, RadioButtonState) DrawRadioButton(Graphics, Point, Rectangle, String, Font, TextFormatFlags, Image, Rectangle, Boolean, RadioButtonState)

在指定状态下和指定位置,用指定文本、文本格式、图像和可选的聚焦框,绘制选项按钮控件(也称为单选按钮)。Draws an option button control (also known as a radio button) in the specified state and location; with the specified text, text formatting, and image; and with an optional focus rectangle.

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

确定指定的对象是否等于当前对象。Determines whether the specified object is equal to the current object.

(Inherited from Object)
GetGlyphSize(Graphics, RadioButtonState) GetGlyphSize(Graphics, RadioButtonState) GetGlyphSize(Graphics, RadioButtonState) GetGlyphSize(Graphics, RadioButtonState)

返回选项按钮(也称为单选按钮)标志符号的大小(以像素为单位)。Returns the size, in pixels, of the option button (also known as a radio button) glyph.

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

作为默认哈希函数。Serves as the default hash function.

(Inherited from Object)
GetType() GetType() GetType() GetType()

获取当前实例的 TypeGets the Type of the current instance.

(Inherited from Object)
IsBackgroundPartiallyTransparent(RadioButtonState) IsBackgroundPartiallyTransparent(RadioButtonState) IsBackgroundPartiallyTransparent(RadioButtonState) IsBackgroundPartiallyTransparent(RadioButtonState)

指示选项按钮(也称为单选按钮)的背景是否有半透明或 alpha 混合块。Indicates whether the background of the option button (also known as a radio button) has semitransparent or alpha-blended pieces.

MemberwiseClone() MemberwiseClone() MemberwiseClone() MemberwiseClone()

创建当前 Object 的浅表副本。Creates a shallow copy of the current Object.

(Inherited from Object)
ToString() ToString() ToString() ToString()

返回表示当前对象的字符串。Returns a string that represents the current object.

(Inherited from Object)

适用于

另请参阅