GroupBoxRenderer 类

定义

命名空间:

System.Windows.Forms

程序集:

System.Windows.Forms.dll

提供用于呈现具有或没有视觉样式的分组框控件的方法。 此类不能被继承。

public ref class GroupBoxRenderer sealed

public ref class GroupBoxRenderer abstract sealed

public sealed class GroupBoxRenderer

public static class GroupBoxRenderer

type GroupBoxRenderer = class

Public NotInheritable Class GroupBoxRenderer

Public Class GroupBoxRenderer

继承

Object

GroupBoxRenderer

示例

下面的代码示例演示如何创建自定义控件，该控件使用 DrawGroupBox 该方法在启用视觉样式时使用双边框绘制组框。

#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 GroupBoxRendererSample
{
    public ref class CustomGroupBox : public Control
    {
    private:
        Rectangle innerRectangle;
    private:
        GroupBoxState state;
    private:
        FlowLayoutPanel^ panel;

    public:
        CustomGroupBox() : Control()
        {
            innerRectangle = Rectangle();
            state = GroupBoxState::Normal;
            panel = gcnew FlowLayoutPanel();

            this->Size = System::Drawing::Size(200, 200);
            this->Location = Point(10, 10);
            this->Controls->Add(panel);
            this->Text = "CustomGroupBox";
            this->Font = SystemFonts::IconTitleFont;

            innerRectangle.X = ClientRectangle.X + 5;
            innerRectangle.Y = ClientRectangle.Y + 15;
            innerRectangle.Width = ClientRectangle.Width - 10;
            innerRectangle.Height = ClientRectangle.Height - 20;

            panel->FlowDirection = FlowDirection::TopDown;
            panel->Location = Point(innerRectangle.X + 5,
                innerRectangle.Y + 5);
            panel->Size = System::Drawing::Size(innerRectangle.Width - 10,
                innerRectangle.Height - 10);
        }

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

            GroupBoxRenderer::DrawGroupBox(e->Graphics, ClientRectangle,
                this->Text, this->Font, state);

            // Draw an additional inner border if visual styles are enabled.
            if (Application::RenderWithVisualStyles)
            {
                GroupBoxRenderer::DrawGroupBox(e->Graphics, innerRectangle,
                    state);
            }
        }

        // Pass added controls to the internal FlowLayoutPanel.
    protected:
        virtual void OnControlAdded(ControlEventArgs^ e) override
        {
            __super::OnControlAdded(e);

            // Ensure that you do not add the panel itself.
            if (e->Control != this->panel)
            {
                this->Controls->Remove(e->Control);
                panel->Controls->Add(e->Control);
            }
        }
    };

    ref class Form1 : public Form
    {
    public:
        Form1() : Form()
        {
            CustomGroupBox^ groupBox1 = gcnew CustomGroupBox();
            groupBox1->Text = "Radio Button Display";
            Controls->Add(groupBox1);

            // Add some radio buttons to test the CustomGroupBox.
            int count = 8;
            array<RadioButton^>^ buttonArray = 
                gcnew array<RadioButton^>(count);
            for (int i = 0; i < count; i++)
            {
                buttonArray[i] = gcnew RadioButton();
                buttonArray[i]->Text = "Button " + (i + 1).ToString();
                groupBox1->Controls->Add(buttonArray[i]);
            }

            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
    // GroupBoxRenderer automatically detects this and draws
    // the group box without visual styles.
    Application::EnableVisualStyles();
    Application::Run(gcnew GroupBoxRendererSample::Form1());
}

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

namespace GroupBoxRendererSample
{
    class Form1 : Form
    {
        private Button button1;
    
        public Form1()
            : base()
        {
            CustomGroupBox GroupBox1 = new CustomGroupBox();
            button1 = new Button();
             
            GroupBox1.Text = "Radio Button Display";
            this.button1.Location = new System.Drawing.Point(205, 231);
            this.button1.Size = new System.Drawing.Size(105, 23);
            this.button1.Text = "Toggle Visual Styles";
            this.button1.Click += new System.EventHandler(this.button1_Click);
            Controls.Add(GroupBox1);
            this.Controls.Add(this.button1);

            // Add some radio buttons to test the CustomGroupBox.
            int count = 8;
            RadioButton[] ButtonArray = new RadioButton[count];
            for (int i = 0; i < count; i++)
            {
                ButtonArray[i] = new RadioButton();
                ButtonArray[i].Text = "Button " + (i + 1).ToString();
                GroupBox1.Controls.Add(ButtonArray[i]);
            }

            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 
            // GroupBoxRenderer automatically detects this and draws
            // the group box without visual styles.
            Application.EnableVisualStyles();
            Application.Run(new Form1());
        }


    // Match application style and toggle visual styles off
    // and on for the application.
        private void button1_Click(object sender, EventArgs e)
        {
            GroupBoxRenderer.RenderMatchingApplicationState = true;
            Application.VisualStyleState = 
                Application.VisualStyleState ^ 
                VisualStyleState.ClientAndNonClientAreasEnabled;

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

    public class CustomGroupBox : Control
    {
        private Rectangle innerRectangle = new Rectangle();
        private GroupBoxState state = GroupBoxState.Normal;
        private FlowLayoutPanel panel = new FlowLayoutPanel();

        public CustomGroupBox()
            : base()
        {
            this.Size = new Size(200, 200);
            this.Location = new Point(10, 10);
            this.Controls.Add(panel);
            this.Text = "CustomGroupBox";
            this.Font = SystemFonts.IconTitleFont;

            innerRectangle.X = ClientRectangle.X + 5;
            innerRectangle.Y = ClientRectangle.Y + 15;
            innerRectangle.Width = ClientRectangle.Width - 10;
            innerRectangle.Height = ClientRectangle.Height - 20;

            panel.FlowDirection = FlowDirection.TopDown;
            panel.Location = new Point(innerRectangle.X + 5,
                innerRectangle.Y + 5);
            panel.Size = new Size(innerRectangle.Width - 10,
                innerRectangle.Height - 10);
        }

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

            GroupBoxRenderer.DrawGroupBox(e.Graphics, ClientRectangle,
                this.Text, this.Font, state);

            // Draw an additional inner border if visual styles are enabled.
            if (Application.RenderWithVisualStyles)
            {
                GroupBoxRenderer.DrawGroupBox(e.Graphics, innerRectangle, state);
            }
        }

        // Pass added controls to the internal FlowLayoutPanel.
        protected override void OnControlAdded(ControlEventArgs e)
        {
            base.OnControlAdded(e);

            // Ensure that you do not add the panel itself.
            if (e.Control != this.panel)
            {
                this.Controls.Remove(e.Control);
                panel.Controls.Add(e.Control);
            }
        }
    }
}

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



Class Form1
    Inherits Form
    Private WithEvents button1 As Button
    
    
    Public Sub New() 
        Dim GroupBox1 As New CustomGroupBox()
        button1 = New Button()
        
        GroupBox1.Text = "Radio Button Display"
        Me.button1.Location = New System.Drawing.Point(185, 231)
        Me.button1.Size = New System.Drawing.Size(105, 23)
        Me.button1.Text = "Toggle Visual Styles"

        Controls.Add(GroupBox1)
        Me.Controls.Add(Me.button1)
        
        ' Add some radio buttons to test the CustomGroupBox.
        Dim count As Integer = 8
        Dim ButtonArray(count) As RadioButton
        For i = 0 To count - 1
            ButtonArray(i) = New RadioButton()
            ButtonArray(i).Text = "Button " +(i + 1).ToString()
            GroupBox1.Controls.Add(ButtonArray(i))
        Next
        
        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 
        ' GroupBoxRenderer automatically detects this and draws
        ' the group box 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

        GroupBoxRenderer.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 CustomGroupBox
    Inherits Control
    Private innerRectangle As New Rectangle()
    Private state As GroupBoxState = GroupBoxState.Normal
    Private panel As New FlowLayoutPanel()
    
    
    Public Sub New() 
        Me.Size = New Size(200, 200)
        Me.Location = New Point(10, 10)
        Me.Controls.Add(panel)
        Me.Text = "CustomGroupBox"
        Me.Font = SystemFonts.IconTitleFont
        
        innerRectangle.X = ClientRectangle.X + 5
        innerRectangle.Y = ClientRectangle.Y + 15
        innerRectangle.Width = ClientRectangle.Width - 10
        innerRectangle.Height = ClientRectangle.Height - 20
        
        panel.FlowDirection = FlowDirection.TopDown
        panel.Location = New Point(innerRectangle.X + 5, innerRectangle.Y + 5)
        panel.Size = New Size(innerRectangle.Width - 10, innerRectangle.Height - 10)
    
    End Sub
    
    
    ' Draw the group box in the current state.
    Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs) 
        MyBase.OnPaint(e)
        
        GroupBoxRenderer.DrawGroupBox(e.Graphics, ClientRectangle, Me.Text, Me.Font, state)
        
        ' Draw an additional inner border if visual styles are enabled.
        If Application.RenderWithVisualStyles Then
            GroupBoxRenderer.DrawGroupBox(e.Graphics, innerRectangle, state)
        End If
    
    End Sub
    
    ' Pass added controls to the internal FlowLayoutPanel.
    Protected Overrides Sub OnControlAdded(ByVal e As ControlEventArgs) 
        MyBase.OnControlAdded(e)
        
        ' Ensure that you do not add the panel itself.
        If e.Control IsNot Me.panel Then
            Me.Controls.Remove(e.Control)
            panel.Controls.Add(e.Control)
        End If
    
    End Sub
End Class

注解

该 GroupBoxRenderer 类提供了一组 static 可用于呈现组框控件的方法。 呈现控件是指绘制控件的用户界面。 若要绘制组框，请使用其中 DrawGroupBox 一种方法。 这些方法提供了各种文本绘图选项。

如果在操作系统中启用了视觉样式，并且视觉样式应用于当前应用程序， DrawGroupBox 则会使用当前视觉样式绘制组框。 否则，DrawGroupBox将使用经典Windows样式绘制组框。 如果要绘制应自动匹配操作系统的当前视觉样式设置的自定义控件，这非常有用。

此类将 System.Windows.Forms.VisualStyles.VisualStyleRenderer 设置为类公开 System.Windows.Forms.VisualStyles.VisualStyleElement.Button.GroupBox 的某个元素的功能包装。 有关详细信息，请参阅使用视觉样式呈现控件。

属性

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。

方法

DrawGroupBox(Graphics, Rectangle, GroupBoxState)	绘制具有指定状态和边界的分组框控件。
DrawGroupBox(Graphics, Rectangle, String, Font, Color, GroupBoxState)	绘制具有指定的状态和边界以及指定的文本、字体和颜色的分组框控件。
DrawGroupBox(Graphics, Rectangle, String, Font, Color, TextFormatFlags, GroupBoxState)	绘制具有指定的状态和边界以及指定的文本、字体、颜色和文本格式的分组框控件。
DrawGroupBox(Graphics, Rectangle, String, Font, GroupBoxState)	绘制具有指定的状态和边界以及指定的文本和字体的分组框控件。
DrawGroupBox(Graphics, Rectangle, String, Font, TextFormatFlags, GroupBoxState)	绘制具有指定的状态和边界以及指定的文本、字体和文本格式的分组框控件。
DrawParentBackground(Graphics, Rectangle, Control)	在指定区域中绘制控件的父级的背景。
IsBackgroundPartiallyTransparent(GroupBoxState)	指示分组框的背景是否包含半透明或混合了 alpha 的块。

另请参阅

• EnableVisualStyles()
• VisualStyleState
• VisualStyleRenderer
• VisualStyleElement