Graphics.MeasureCharacterRanges Método

Source:

Graphics.cs

public:
 cli::array <System::Drawing::Region ^> ^ MeasureCharacterRanges(ReadOnlySpan<char> text, System::Drawing::Font ^ font, System::Drawing::RectangleF layoutRect, System::Drawing::StringFormat ^ stringFormat);

public System.Drawing.Region[] MeasureCharacterRanges (ReadOnlySpan<char> text, System.Drawing.Font font, System.Drawing.RectangleF layoutRect, System.Drawing.StringFormat? stringFormat);

member this.MeasureCharacterRanges : ReadOnlySpan<char> * System.Drawing.Font * System.Drawing.RectangleF * System.Drawing.StringFormat -> System.Drawing.Region[]

Public Function MeasureCharacterRanges (text As ReadOnlySpan(Of Char), font As Font, layoutRect As RectangleF, stringFormat As StringFormat) As Region()

Parámetros

Devoluciones

Este método devuelve una matriz de objetos Region, cada uno de los cuales enlaza un intervalo de posiciones de caracteres dentro de la cadena especificada.

Source:

Graphics.cs

Source:

Graphics.cs

public:
 cli::array <System::Drawing::Region ^> ^ MeasureCharacterRanges(System::String ^ text, System::Drawing::Font ^ font, System::Drawing::RectangleF layoutRect, System::Drawing::StringFormat ^ stringFormat);

public System.Drawing.Region[] MeasureCharacterRanges (string? text, System.Drawing.Font font, System.Drawing.RectangleF layoutRect, System.Drawing.StringFormat? stringFormat);

public System.Drawing.Region[] MeasureCharacterRanges (string text, System.Drawing.Font font, System.Drawing.RectangleF layoutRect, System.Drawing.StringFormat stringFormat);

member this.MeasureCharacterRanges : string * System.Drawing.Font * System.Drawing.RectangleF * System.Drawing.StringFormat -> System.Drawing.Region[]

Public Function MeasureCharacterRanges (text As String, font As Font, layoutRect As RectangleF, stringFormat As StringFormat) As Region()

Parámetros

Devoluciones

Este método devuelve una matriz de objetos Region, cada uno de los cuales enlaza un intervalo de posiciones de caracteres dentro de la cadena especificada.

Excepciones

Ejemplos

El ejemplo de código siguiente está diseñado para su uso con Windows Forms y requiere PaintEventArgse, que es un parámetro del controlador de eventos Paint. El código realiza las siguientes acciones:

• Establece una cadena "First and Second ranges" y una fuente para mostrar la cadena ("Times New Roman", 16 point).

• Establece dos intervalos de caracteres dentro de la cadena (que corresponden a las palabras "First" y "Second").

• Crea un rectángulo en el que se va a mostrar la cadena.

• Establece el formato de la cadena 3/4, incluidos los dos intervalos de caracteres.

• Dibuja la cadena en la pantalla.

• Mide los intervalos de caracteres, determina rectángulos que enlazan los dos intervalos especificados.

• Dibuja los dos rectángulos en la pantalla.

El resultado es la cadena mostrada con el primer intervalo ("Primero") limitado por un rectángulo rojo y el segundo intervalo ("Segundo") limitado por un rectángulo azul.

public:
   void MeasureCharacterRangesRegions( PaintEventArgs^ e )
   {
      // Set up string.
      String^ measureString = "First and Second ranges";
      System::Drawing::Font^ stringFont = gcnew System::Drawing::Font( "Times New Roman",16.0F );

      // Set character ranges to "First" and "Second".
      array<CharacterRange>^ characterRanges = {CharacterRange(0,5),CharacterRange(10,6)};

      // Create rectangle for layout.
      float x = 50.0F;
      float y = 50.0F;
      float width = 35.0F;
      float height = 200.0F;
      RectangleF layoutRect = RectangleF(x,y,width,height);

      // Set string format.
      StringFormat^ stringFormat = gcnew StringFormat;
      stringFormat->FormatFlags = StringFormatFlags::DirectionVertical;
      stringFormat->SetMeasurableCharacterRanges( characterRanges );

      // Draw string to screen.
      e->Graphics->DrawString( measureString, stringFont, Brushes::Black, x, y, stringFormat );

      // Measure two ranges in string.
      array<System::Drawing::Region^>^stringRegions = e->Graphics->MeasureCharacterRanges( measureString, 
    stringFont, layoutRect, stringFormat );

      // Draw rectangle for first measured range.
      RectangleF measureRect1 = stringRegions[ 0 ]->GetBounds( e->Graphics );
      e->Graphics->DrawRectangle( gcnew Pen( Color::Red,1.0f ), Rectangle::Round( measureRect1 ) );

      // Draw rectangle for second measured range.
      RectangleF measureRect2 = stringRegions[ 1 ]->GetBounds( e->Graphics );
      e->Graphics->DrawRectangle( gcnew Pen( Color::Blue,1.0f ), Rectangle::Round( measureRect2 ) );
   }

private void MeasureCharacterRangesRegions(PaintEventArgs e)
{

    // Set up string.
    string measureString = "First and Second ranges";
    Font stringFont = new Font("Times New Roman", 16.0F);

    // Set character ranges to "First" and "Second".
    CharacterRange[] characterRanges = { new CharacterRange(0, 5), new CharacterRange(10, 6) };

    // Create rectangle for layout.
    float x = 50.0F;
    float y = 50.0F;
    float width = 35.0F;
    float height = 200.0F;
    RectangleF layoutRect = new RectangleF(x, y, width, height);

    // Set string format.
    StringFormat stringFormat = new StringFormat();
    stringFormat.FormatFlags = StringFormatFlags.DirectionVertical;
    stringFormat.SetMeasurableCharacterRanges(characterRanges);

    // Draw string to screen.
    e.Graphics.DrawString(measureString, stringFont, Brushes.Black, x, y, stringFormat);

    // Measure two ranges in string.
    Region[] stringRegions = e.Graphics.MeasureCharacterRanges(measureString, 
stringFont, layoutRect, stringFormat);

    // Draw rectangle for first measured range.
    RectangleF measureRect1 = stringRegions[0].GetBounds(e.Graphics);
    e.Graphics.DrawRectangle(new Pen(Color.Red, 1), Rectangle.Round(measureRect1));

    // Draw rectangle for second measured range.
    RectangleF measureRect2 = stringRegions[1].GetBounds(e.Graphics);
    e.Graphics.DrawRectangle(new Pen(Color.Blue, 1), Rectangle.Round(measureRect2));
}

Private Sub MeasureCharacterRangesRegions(ByVal e As PaintEventArgs)

    ' Set up string.
    Dim measureString As String = "First and Second ranges"
    Dim stringFont As New Font("Times New Roman", 16.0F)

    ' Set character ranges to "First" and "Second".
    Dim characterRanges As CharacterRange() = _
    {New CharacterRange(0, 5), New CharacterRange(10, 6)}

    ' Create rectangle for layout.
    Dim x As Single = 50.0F
    Dim y As Single = 50.0F
    Dim width As Single = 35.0F
    Dim height As Single = 200.0F
    Dim layoutRect As New RectangleF(x, y, width, height)

    ' Set string format.
    Dim stringFormat As New StringFormat
    stringFormat.FormatFlags = StringFormatFlags.DirectionVertical
    stringFormat.SetMeasurableCharacterRanges(characterRanges)

    ' Draw string to screen.
    e.Graphics.DrawString(measureString, stringFont, Brushes.Black, _
    x, y, stringFormat)

    ' Measure two ranges in string.
    Dim stringRegions() As [Region] = e.Graphics.MeasureCharacterRanges(measureString, _
stringFont, layoutRect, stringFormat)

    ' Draw rectangle for first measured range.
    Dim measureRect1 As RectangleF = _
    stringRegions(0).GetBounds(e.Graphics)
    e.Graphics.DrawRectangle(New Pen(Color.Red, 1), _
    Rectangle.Round(measureRect1))

    ' Draw rectangle for second measured range.
    Dim measureRect2 As RectangleF = _
    stringRegions(1).GetBounds(e.Graphics)
    e.Graphics.DrawRectangle(New Pen(Color.Blue, 1), _
    Rectangle.Round(measureRect2))
End Sub

Comentarios

Las regiones devueltas por este método dependen de la resolución, por lo que puede haber una ligera pérdida de precisión si las cadenas se registran en un metarchivo en una resolución y, posteriormente, se reproducen en una resolución diferente.

Consulte también

• MeasureString(String, Font)
• MeasureText(IDeviceContext, String, Font, Size, TextFormatFlags)