TabRenderer Kelas

Definisi

Ruang nama:

System.Windows.Forms

Rakitan:

System.Windows.Forms.dll

Sumber:

TabRenderer.cs

Menyediakan metode yang digunakan untuk merender kontrol tab dengan gaya visual. Kelas ini tidak dapat diwariskan.

public ref class TabRenderer abstract sealed

public static class TabRenderer

type TabRenderer = class

Public Class TabRenderer

Warisan

Object

TabRenderer

Contoh

Contoh kode berikut menunjukkan cara membuat kontrol kustom yang menggunakan DrawTabPage metode dan DrawTabItem untuk menggambar kontrol tab dasar dengan dua tab.

#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 TabRendererSample
{
    public ref class CustomTabControl : public Control
    {
    private:
        Rectangle tabPageRectangle;
        Rectangle tabItemRectangle1;
        Rectangle tabItemRectangle2;
        int tabHeight;
        int tabWidth;
        TabItemState tab1State;
        TabItemState tab2State;
        String^ tab1Text;
        String^ tab2Text;
        bool tab1Focused;
        bool tab2Focused;

    public:
        CustomTabControl()
        {
            this->tabHeight = 30;
            this->tabWidth = 100;
            this->tab1State = TabItemState::Selected;
            this->tab2State = TabItemState::Normal;
            this->tab1Text = "Tab 1";
            this->tab2Text = "Tab 2";
            this->tab1Focused = true;
            this->tab2Focused = false;
            this->Size = System::Drawing::Size(300, 300);
            this->Location = Point(10, 10);
            this->Font = SystemFonts::IconTitleFont;
            this->Text = "TabRenderer";
            this->DoubleBuffered = true;

            tabPageRectangle = Rectangle(ClientRectangle.X,
                ClientRectangle.Y + tabHeight,
                ClientRectangle.Width,
                ClientRectangle.Height - tabHeight);

            // Extend the first tab rectangle down by 2 pixels, 
            // because it is selected by default.
            tabItemRectangle1 = Rectangle(ClientRectangle.X,
                ClientRectangle.Y, tabWidth, tabHeight + 2);

            tabItemRectangle2 = Rectangle(ClientRectangle.Location.X +
                tabWidth, ClientRectangle.Location.Y, tabWidth, tabHeight);
        }

        // Draw the tab page and the tab items.
    protected:
        virtual void OnPaint(PaintEventArgs^ e) override
        {
            __super::OnPaint(e);

            if (!TabRenderer::IsSupported)
            {
                this->Parent->Text = "CustomTabControl Disabled";
                return;
            }

            TabRenderer::DrawTabPage(e->Graphics, tabPageRectangle);
            TabRenderer::DrawTabItem(e->Graphics, tabItemRectangle1,
                tab1Text, this->Font, tab1Focused, tab1State);
            TabRenderer::DrawTabItem(e->Graphics, tabItemRectangle2,
                tab2Text, this->Font, tab2Focused, tab2State);

            this->Parent->Text = "CustomTabControl Enabled";
        }

        // Draw the selected tab item.
    protected:
        virtual void OnMouseDown(MouseEventArgs^ e) override
        {
            __super::OnMouseDown(e);

            if (!TabRenderer::IsSupported)
            {
                return;
            }

            // The first tab is clicked. Note that the height of the 
            // selected tab rectangle is raised by 2, so that it draws 
            // over the border of the tab page.
            if (tabItemRectangle1.Contains(e->Location))
            {
                tab1State = TabItemState::Selected;
                tab2State = TabItemState::Normal;
                tabItemRectangle1.Height += 2;
                tabItemRectangle2.Height -= 2;
                tab1Focused = true;
                tab2Focused = false;
            }

            // The second tab is clicked.
            if (tabItemRectangle2.Contains(e->Location))
            {
                tab2State = TabItemState::Selected;
                tab1State = TabItemState::Normal;
                tabItemRectangle2.Height += 2;
                tabItemRectangle1.Height -= 2;
                tab2Focused = true;
                tab1Focused = false;
            }

            Invalidate();
        }
    };
    public ref class Form1 : public Form
    {
    public:
        Form1()

        {
            CustomTabControl^ Tab1 = gcnew CustomTabControl();
            Controls->Add(Tab1);
            this->Size = System::Drawing::Size(500, 500);
        }

    };
}

[STAThread]
int main()
{
    // The call to EnableVisualStyles below does not affect whether 
    // TabRenderer.IsSupported is true; as long as visual styles 
    // are enabled by the operating system, IsSupported is true.
    Application::EnableVisualStyles();
    Application::Run(gcnew TabRendererSample::Form1());
}

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

namespace TabRendererSample
{
    class Form1 : Form
    {
        public Form1()
            : base()
        {
            CustomTabControl Tab1 = new CustomTabControl();
            Controls.Add(Tab1);
            this.Size = new Size(500, 500);
        }

        [STAThread]
        static void Main()
        {
            // The call to EnableVisualStyles below does not affect whether 
            // TabRenderer.IsSupported is true; as long as visual styles 
            // are enabled by the operating system, IsSupported is true.
            Application.EnableVisualStyles();
            Application.Run(new Form1());
        }
    }

    public class CustomTabControl : Control
    {
        private Rectangle tabPageRectangle;
        private Rectangle tabItemRectangle1;
        private Rectangle tabItemRectangle2;
        private int tabHeight = 30;
        private int tabWidth = 100;
        private TabItemState tab1State = TabItemState.Selected;
        private TabItemState tab2State = TabItemState.Normal;
        private string tab1Text = "Tab 1";
        private string tab2Text = "Tab 2";
        private bool tab1Focused = true;
        private bool tab2Focused = false;

        public CustomTabControl()
            : base()
        {
            this.Size = new Size(300, 300);
            this.Location = new Point(10, 10);
            this.Font = SystemFonts.IconTitleFont;
            this.Text = "TabRenderer";
            this.DoubleBuffered = true;

            tabPageRectangle = new Rectangle(ClientRectangle.X,
                ClientRectangle.Y + tabHeight,
                ClientRectangle.Width,
                ClientRectangle.Height - tabHeight);

            // Extend the first tab rectangle down by 2 pixels, 
            // because it is selected by default.
            tabItemRectangle1 = new Rectangle(ClientRectangle.X,
                ClientRectangle.Y, tabWidth, tabHeight + 2);

            tabItemRectangle2 = new Rectangle(ClientRectangle.Location.X +
                tabWidth, ClientRectangle.Location.Y, tabWidth, tabHeight);
        }

        // Draw the tab page and the tab items.
        protected override void OnPaint(PaintEventArgs e)
        {
            base.OnPaint(e);

            if (!TabRenderer.IsSupported)
            {
                this.Parent.Text = "CustomTabControl Disabled";
                return;
            }

            TabRenderer.DrawTabPage(e.Graphics, tabPageRectangle);
            TabRenderer.DrawTabItem(e.Graphics, tabItemRectangle1,
                tab1Text, this.Font, tab1Focused, tab1State);
            TabRenderer.DrawTabItem(e.Graphics, tabItemRectangle2,
                tab2Text, this.Font, tab2Focused, tab2State);

            this.Parent.Text = "CustomTabControl Enabled";
        }

        // Draw the selected tab item.
        protected override void OnMouseDown(MouseEventArgs e)
        {
            base.OnMouseDown(e);

            if (!TabRenderer.IsSupported)
                return;

            // The first tab is clicked. Note that the height of the 
            // selected tab rectangle is raised by 2, so that it draws 
            // over the border of the tab page.
            if (tabItemRectangle1.Contains(e.Location))
            {
                tab1State = TabItemState.Selected;
                tab2State = TabItemState.Normal;
                tabItemRectangle1.Height += 2;
                tabItemRectangle2.Height -= 2;
                tab1Focused = true;
                tab2Focused = false;
            }

            // The second tab is clicked.
            if (tabItemRectangle2.Contains(e.Location))
            {
                tab2State = TabItemState.Selected;
                tab1State = TabItemState.Normal;
                tabItemRectangle2.Height += 2;
                tabItemRectangle1.Height -= 2;
                tab2Focused = true;
                tab1Focused = false;
            }

            Invalidate();
        }
    }
}

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

Namespace TabRendererSample

    Class Form1
        Inherits Form

        Public Sub New()
            Dim Tab1 As New CustomTabControl()
            Controls.Add(Tab1)
            Me.Size = New Size(500, 500)
        End Sub

        <STAThread()> _
        Shared Sub Main()
            ' The call to EnableVisualStyles below does not affect whether 
            ' TabRenderer.IsSupported is true; as long as visual styles 
            ' are enabled by the operating system, IsSupported is true.
            Application.EnableVisualStyles()
            Application.Run(New Form1())
        End Sub
    End Class

    Public Class CustomTabControl
        Inherits Control

        Private tabPageRectangle As Rectangle
        Private tabItemRectangle1 As Rectangle
        Private tabItemRectangle2 As Rectangle
        Private tabHeight As Integer = 30
        Private tabWidth As Integer = 100
        Private tab1State As TabItemState = TabItemState.Selected
        Private tab2State As TabItemState = TabItemState.Normal
        Private tab1Text As String = "Tab 1"
        Private tab2Text As String = "Tab 2"
        Private tab1Focused As Boolean = True
        Private tab2Focused As Boolean = False

        Public Sub New()
            With Me
                .Size = New Size(300, 300)
                .Location = New Point(10, 10)
                .Font = SystemFonts.IconTitleFont
                .Text = "TabRenderer"
                .DoubleBuffered = True
            End With

            tabPageRectangle = New Rectangle(ClientRectangle.X, _
                ClientRectangle.Y + tabHeight, _
                ClientRectangle.Width, _
                ClientRectangle.Height - tabHeight)

            ' Extend the first tab rectangle down by 2 pixels, because
            ' it is selected by default.
            tabItemRectangle1 = New Rectangle(ClientRectangle.X, _
                ClientRectangle.Y, tabWidth, tabHeight + 2)

            tabItemRectangle2 = New Rectangle(ClientRectangle.Location.X + _
                tabWidth, ClientRectangle.Location.Y, tabWidth, tabHeight)
        End Sub

        ' Draw the tab page and the tab items.
        Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs)
            MyBase.OnPaint(e)

            If Not TabRenderer.IsSupported Then
                Me.Parent.Text = "CustomTabControl Disabled"
                Return
            End If

            TabRenderer.DrawTabPage(e.Graphics, tabPageRectangle)
            TabRenderer.DrawTabItem(e.Graphics, tabItemRectangle1, _
                tab1Text, Me.Font, tab1Focused, tab1State)
            TabRenderer.DrawTabItem(e.Graphics, tabItemRectangle2, _
                tab2Text, Me.Font, tab2Focused, tab2State)
            Me.Parent.Text = "CustomTabControl Enabled"
        End Sub

        ' Draw the selected tab item.
        Protected Overrides Sub OnMouseDown(ByVal e As MouseEventArgs)
            MyBase.OnMouseDown(e)

            If Not TabRenderer.IsSupported Then
                Return
            End If

            ' The first tab is clicked. Note that the height of the 
            ' selected tab rectangle is raised by 2, so that it draws 
            ' over the border of the tab page.
            If tabItemRectangle1.Contains(e.Location) Then
                tab1State = TabItemState.Selected
                tab2State = TabItemState.Normal
                tabItemRectangle1.Height += 2
                tabItemRectangle2.Height -= 2
                tab1Focused = True
                tab2Focused = False
            End If

            ' The second tab is clicked.
            If tabItemRectangle2.Contains(e.Location) Then
                tab2State = TabItemState.Selected
                tab1State = TabItemState.Normal
                tabItemRectangle2.Height += 2
                tabItemRectangle1.Height -= 2
                tab2Focused = True
                tab1Focused = False
            End If

            Invalidate()
        End Sub

    End Class
End Namespace

Keterangan

Kelas ini TabRenderer menyediakan serangkaian static metode yang dapat digunakan untuk merender kontrol tab dengan gaya visual sistem operasi saat ini. Merender kontrol mengacu pada menggambar antarmuka pengguna kontrol. Ini berguna jika Anda menggambar kontrol kustom yang harus memiliki tampilan gaya visual saat ini. Untuk menggambar kontrol tab, gunakan DrawTabPage metode untuk menggambar halaman, dan gunakan DrawTabItem metode untuk menggambar setiap tab.

Jika gaya visual diaktifkan dalam sistem operasi dan gaya visual diterapkan ke area klien jendela aplikasi, metode kelas ini akan menggambar kontrol tab dengan gaya visual saat ini. Jika tidak, metode dan properti kelas ini akan melempar .InvalidOperationException Untuk menentukan apakah anggota kelas ini dapat digunakan, periksa nilai IsSupported properti.

Kelas ini membungkus fungsionalitas System.Windows.Forms.VisualStyles.VisualStyleRenderer yang diatur ke salah satu elemen yang diekspos oleh System.Windows.Forms.VisualStyles.VisualStyleElement.Tab kelas . Untuk informasi selengkapnya, lihat Kontrol Penyajian dengan Gaya Visual.

Properti

Nama	Deskripsi
IsSupported	Mendapatkan nilai yang menunjukkan apakah TabRenderer kelas dapat digunakan untuk menggambar kontrol tab dengan gaya visual.

Metode

Nama	Deskripsi
DrawTabItem(Graphics, Rectangle, Boolean, TabItemState)	Menggambar tab dalam status dan batas yang ditentukan, dan dengan persegi panjang fokus opsional.
DrawTabItem(Graphics, Rectangle, Image, Rectangle, Boolean, TabItemState)	Menggambar tab dalam status dan batas yang ditentukan, dengan gambar yang ditentukan, dan dengan persegi panjang fokus opsional.
DrawTabItem(Graphics, Rectangle, String, Font, Boolean, TabItemState)	Menggambar tab dalam status dan batas yang ditentukan, dengan teks yang ditentukan, dan dengan persegi panjang fokus opsional.
DrawTabItem(Graphics, Rectangle, String, Font, Image, Rectangle, Boolean, TabItemState)	Menggambar tab dalam status dan batas yang ditentukan, dengan teks dan gambar yang ditentukan, dan dengan persegi panjang fokus opsional.
DrawTabItem(Graphics, Rectangle, String, Font, TabItemState)	Menggambar tab dalam status dan batas yang ditentukan, dan dengan teks yang ditentukan.
DrawTabItem(Graphics, Rectangle, String, Font, TextFormatFlags, Boolean, TabItemState)	Menggambar tab dalam status dan batas yang ditentukan, dengan pemformatan teks dan teks yang ditentukan, dan dengan persegi panjang fokus opsional.
DrawTabItem(Graphics, Rectangle, String, Font, TextFormatFlags, Image, Rectangle, Boolean, TabItemState)	Menggambar tab dalam status dan batas yang ditentukan; dengan teks, pemformatan teks, dan gambar yang ditentukan; dan dengan persegi panjang fokus opsional.
DrawTabItem(Graphics, Rectangle, TabItemState)	Menggambar tab dalam status dan batas yang ditentukan.
DrawTabPage(Graphics, Rectangle)	Menggambar halaman tab dalam batas yang ditentukan.

Lihat juga

• VisualStyleRenderer
• VisualStyleElement