Graphics.TextContrast-Eigenschaft

Ruft den Gammakorrekturwert für die Darstellung von Text ab oder legt diesen fest.

Namespace: System.Drawing
Assembly: System.Drawing (in system.drawing.dll)

Syntax

'Declaration
Public Property TextContrast As Integer
'Usage
Dim instance As Graphics
Dim value As Integer

value = instance.TextContrast

instance.TextContrast = value

public int TextContrast { get; set; }

public:
property int TextContrast {
    int get ();
    void set (int value);
}

/** @property */
public int get_TextContrast ()

/** @property */
public void set_TextContrast (int value)

public function get TextContrast () : int

public function set TextContrast (value : int)

Eigenschaftenwert

Der Gammakorrekturwert, der für das Rendern von Anitaliasing- und ClearType-Text verwendet wird.

Hinweise

Der Gammakorrekturwert muss zwischen 0 und 12 liegen. Der Standardwert ist 4.

Beispiel

Im folgenden Codebeispiel wird die Verwendung der TextRenderingHint-Eigenschaft und der TextContrast-Eigenschaft veranschaulicht.

Dieses Beispiel ist für die Verwendung mit Windows Forms vorgesehen. Fügen Sie den Code in ein Formular ein, und rufen Sie beim Behandeln des Paint-Ereignisses des Formulars die ChangeTextRenderingHintAndTextContrast-Methode auf, wobei Sie e als PaintEventArgs übergeben.

Private Sub ChangeTextRenderingHintAndTextContrast(ByVal e As _
    PaintEventArgs)

    ' Retrieve the graphics object.
    Dim formGraphics As Graphics = e.Graphics

    ' Declare a new font.
    Dim myFont As Font = New Font(FontFamily.GenericSansSerif, _
        20, FontStyle.Regular)

    ' Set the TextRenderingHint property.
    formGraphics.TextRenderingHint = _
        System.Drawing.Text.TextRenderingHint.SingleBitPerPixel

    ' Draw the string.
    formGraphics.DrawString("Hello World", myFont, _
        Brushes.Firebrick, 20.0F, 20.0F)

    ' Change the TextRenderingHint property.
    formGraphics.TextRenderingHint = _
        System.Drawing.Text.TextRenderingHint.AntiAliasGridFit

    ' Draw the string again.
    formGraphics.DrawString("Hello World", myFont, _
        Brushes.Firebrick, 20.0F, 60.0F)

    ' Set the text contrast to a high-contrast setting.
    formGraphics.TextContrast = 0

    ' Draw the string.
    formGraphics.DrawString("Hello World", myFont, _
        Brushes.DodgerBlue, 20.0F, 100.0F)

    ' Set the text contrast to a low-contrast setting.
    formGraphics.TextContrast = 12

    ' Draw the string again.
    formGraphics.DrawString("Hello World", myFont, _
        Brushes.DodgerBlue, 20.0F, 140.0F)

    ' Dispose of the font object.
    myFont.Dispose()

End Sub

private void ChangeTextRenderingHintAndTextContrast(PaintEventArgs e)
{

    // Retrieve the graphics object.
    Graphics formGraphics = e.Graphics;

    // Declare a new font.
    Font myFont = new Font(FontFamily.GenericSansSerif, 20, 
        FontStyle.Regular);

    // Set the TextRenderingHint property.
    formGraphics.TextRenderingHint = 
        System.Drawing.Text.TextRenderingHint.SingleBitPerPixel;

    // Draw the string.
    formGraphics.DrawString("Hello World", myFont, 
        Brushes.Firebrick, 20.0F, 20.0F);

    // Change the TextRenderingHint property.
    formGraphics.TextRenderingHint = 
        System.Drawing.Text.TextRenderingHint.AntiAliasGridFit;

    // Draw the string again.
    formGraphics.DrawString("Hello World", myFont, 
        Brushes.Firebrick, 20.0F, 60.0F);

    // Set the text contrast to a high-contrast setting.
    formGraphics.TextContrast = 0;

    // Draw the string.
    formGraphics.DrawString("Hello World", myFont, 
        Brushes.DodgerBlue, 20.0F, 100.0F);

    // Set the text contrast to a low-contrast setting.
    formGraphics.TextContrast = 12;

    // Draw the string again.
    formGraphics.DrawString("Hello World", myFont, 
        Brushes.DodgerBlue, 20.0F, 140.0F);

    // Dispose of the font object.
    myFont.Dispose();

}

private:
   void ChangeTextRenderingHintAndTextContrast( PaintEventArgs^ e )
   {
      // Retrieve the graphics object.
      Graphics^ formGraphics = e->Graphics;

      // Declare a new font.
      System::Drawing::Font^ myFont = gcnew System::Drawing::Font( FontFamily::GenericSansSerif,20,FontStyle::Regular );

      // Set the TextRenderingHint property.
      formGraphics->TextRenderingHint = System::Drawing::Text::TextRenderingHint::SingleBitPerPixel;

      // Draw the string.
      formGraphics->DrawString( "Hello World", myFont, Brushes::Firebrick, 20.0F, 20.0F );

      // Change the TextRenderingHint property.
      formGraphics->TextRenderingHint = System::Drawing::Text::TextRenderingHint::AntiAliasGridFit;

      // Draw the string again.
      formGraphics->DrawString( "Hello World", myFont, Brushes::Firebrick, 20.0F, 60.0F );

      // Set the text contrast to a high-contrast setting.
      formGraphics->TextContrast = 0;

      // Draw the string.
      formGraphics->DrawString( "Hello World", myFont, Brushes::DodgerBlue, 20.0F, 100.0F );

      // Set the text contrast to a low-contrast setting.
      formGraphics->TextContrast = 12;

      // Draw the string again.
      formGraphics->DrawString( "Hello World", myFont, Brushes::DodgerBlue, 20.0F, 140.0F );

      // Dispose of the font object.
      delete myFont;
   }

private void ChangeTextRenderingHintAndTextContrast(PaintEventArgs e)
{
    // Retrieve the graphics object.
    Graphics formGraphics = e.get_Graphics();

    // Declare a new font.
    Font myFont = new Font(FontFamily.get_GenericSansSerif(), 
                20, FontStyle.Regular);

    // Set the TextRenderingHint property.
    formGraphics.set_TextRenderingHint(System.Drawing.Text.
        TextRenderingHint.SingleBitPerPixel);

    // Draw the string.
    formGraphics.DrawString("Hello World", myFont,
        Brushes.get_Firebrick(), 20, 20);

    // Change the TextRenderingHint property.
    formGraphics.set_TextRenderingHint(System.Drawing.Text.
        TextRenderingHint.AntiAliasGridFit);

    // Draw the string again.
    formGraphics.DrawString("Hello World", myFont, 
        Brushes.get_Firebrick(), 20, 60);

    // Set the text contrast to a high-contrast setting.
    formGraphics.set_TextContrast(0);

    // Draw the string.
    formGraphics.DrawString("Hello World", myFont, 
        Brushes.get_DodgerBlue(), 20, 100);

    // Set the text contrast to a low-contrast setting.
    formGraphics.set_TextContrast(12);

    // Draw the string again.
    formGraphics.DrawString("Hello World", myFont,
        Brushes.get_DodgerBlue(), 20, 140);

    // Dispose of the font object.
    myFont.Dispose();
} //ChangeTextRenderingHintAndTextContrast

Plattformen

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile für Pocket PC, Windows Mobile für Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

.NET Framework unterstützt nicht alle Versionen sämtlicher Plattformen. Eine Liste der unterstützten Versionen finden Sie unter Systemanforderungen.

Versionsinformationen

.NET Framework

Unterstützt in: 2.0, 1.1, 1.0

Siehe auch

Referenz

Graphics-Klasse
Graphics-Member
System.Drawing-Namespace