TabControl.DisplayRectangle Proprietà

Definizione

Spazio dei nomi:

System.Windows.Forms

Assembly:

System.Windows.Forms.dll

Ottiene l'area di visualizzazione delle schede del controllo.

public:
 virtual property System::Drawing::Rectangle DisplayRectangle { System::Drawing::Rectangle get(); };

public override System.Drawing.Rectangle DisplayRectangle { get; }

member this.DisplayRectangle : System.Drawing.Rectangle

Public Overrides ReadOnly Property DisplayRectangle As Rectangle

Valore della proprietà

Rectangle

Oggetto Rectangle che rappresenta l'area di visualizzazione delle schede.

Esempio

Nell'esempio di codice seguente viene creato un oggetto TabControl con un TabPageoggetto . In questo esempio viene utilizzata la proprietà per disegnare un Rectangle oggetto che rappresenta l'area DisplayRectangle di visualizzazione della pagina della scheda di tabControl1. Si noti che l'esempio usa il Inflate metodo; in caso contrario, il TabPage codice di disegno sovrascrive il Rectangle disegno nel DrawOnTabPage metodo.

using namespace System::Drawing;
using namespace System::Windows::Forms;
public ref class Form1: public Form
{
private:
   Rectangle myTabRect;

public:
   Form1()
   {
      TabControl^ tabControl1 = gcnew TabControl;
      TabPage^ tabPage1 = gcnew TabPage;
      tabControl1->DrawMode = TabDrawMode::OwnerDrawFixed;
      tabControl1->Appearance = TabAppearance::Buttons;
      tabControl1->Location = Point(25,25);
      tabControl1->Controls->Add( tabPage1 );
      Controls->Add( tabControl1 );
      
      // Gets a Rectangle that represents the tab page display area of tabControl1.
      myTabRect = tabControl1->DisplayRectangle;
      myTabRect.Inflate( 1, 1 );
      tabControl1->DrawItem += gcnew DrawItemEventHandler( this, &Form1::DrawOnTabPage );
   }


private:
   void DrawOnTabPage( Object^ /*sender*/, DrawItemEventArgs^ e )
   {
      Graphics^ g = e->Graphics;
      Pen^ p = gcnew Pen( Color::Blue );
      g->DrawRectangle( p, myTabRect );
   }

};

int main()
{
   Application::Run( gcnew Form1 );
}

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

public class Form1 : Form
{
    private Rectangle myTabRect;

    public Form1()
    {
        TabControl tabControl1 = new TabControl();
        TabPage tabPage1 = new TabPage();

        tabControl1.DrawMode = TabDrawMode.OwnerDrawFixed;
        tabControl1.Appearance = TabAppearance.Buttons;
        tabControl1.Location = new Point(25, 25);
        tabControl1.Controls.Add(tabPage1);
        Controls.Add(tabControl1);

        // Gets a Rectangle that represents the tab page display area of tabControl1.
        myTabRect = tabControl1.DisplayRectangle;

        myTabRect.Inflate(1, 1); 
        tabControl1.DrawItem += new DrawItemEventHandler(DrawOnTabPage);
    }

    private void DrawOnTabPage(object sender, DrawItemEventArgs e)
    {
        Graphics g = e.Graphics;
        Pen p = new Pen(Color.Blue);
        g.DrawRectangle(p, myTabRect);
    }

    static void Main() 
    {
        Application.Run(new Form1());
    }
}

Imports System.Drawing
Imports System.Windows.Forms

Public Class Form1
   Inherits Form
   Private myTabRect As Rectangle
   
   Public Sub New()
      Dim tabControl1 As New TabControl()
      Dim tabPage1 As New TabPage()
      
      tabControl1.DrawMode = TabDrawMode.OwnerDrawFixed
      tabControl1.Appearance = TabAppearance.Buttons
      tabControl1.Location = New Point(25, 25)
      tabControl1.Controls.Add(tabPage1)
      Controls.Add(tabControl1)
      
      ' Gets a Rectangle that represents the tab page display area of tabControl1.
      myTabRect = tabControl1.DisplayRectangle
      
      myTabRect.Inflate(1, 1)
      AddHandler tabControl1.DrawItem, AddressOf DrawOnTabPage
   End Sub
   
   Private Sub DrawOnTabPage(sender As Object, e As DrawItemEventArgs)
      Dim g As Graphics = e.Graphics
      Dim p As New Pen(Color.Blue)
      g.DrawRectangle(p, myTabRect)
   End Sub
   
   Shared Sub Main()
      Application.Run(New Form1())
   End Sub
End Class

Vedi anche

• Rectangle