Package org.eclipse.swt.graphics

Class FontMetrics

java.lang.Object
org.eclipse.swt.graphics.FontMetrics
public final class FontMetrics extends Object
Instances of this class provide measurement information about fonts including ascent, descent, height, leading space between rows, and average character width. FontMetrics are obtained from GCs using the getFontMetrics() method.
See Also:

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    org.eclipse.swt.internal.win32.TEXTMETRIC
    handle
    On Windows, handle is a Win32 TEXTMETRIC struct (Warning: This field is platform dependent)

  • Method Summary

    Modifier and Type
    Method
    Description
    boolean
    equals(Object object)
    Compares the argument to the receiver, and returns true if they represent the same object using a class specific comparison.
    int
    getAscent()
    Returns the ascent of the font described by the receiver.
    double
    getAverageCharacterWidth()
    Returns the average character width, measured in points, of the font described by the receiver.
    int
    getAverageCharWidth()
    Deprecated.
    Use getAverageCharacterWidth() instead
    int
    getDescent()
    Returns the descent of the font described by the receiver.
    int
    getHeight()
    Returns the height of the font described by the receiver, measured in points.
    int
    getLeading()
    Returns the leading area of the font described by the receiver.
    int
    hashCode()
    Returns an integer hash code for the receiver.
    static FontMetrics
    win32_new(org.eclipse.swt.internal.win32.TEXTMETRIC handle, int nativeZoom)
    Invokes platform specific functionality to allocate a new font metrics.

    Methods inherited from class java.lang.Object

    clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

  • Field Details

    • handle

      public org.eclipse.swt.internal.win32.TEXTMETRIC handle
      On Windows, handle is a Win32 TEXTMETRIC struct (Warning: This field is platform dependent)

      IMPORTANT: This field is not part of the SWT public API. It is marked public only so that it can be shared within the packages provided by SWT. It is not available on all platforms and should never be accessed from application code.

      Restriction:
      This field is not intended to be referenced by clients.

  • Method Details

    • equals

      public boolean equals(Object object)
      Compares the argument to the receiver, and returns true if they represent the same object using a class specific comparison.
      Overrides:
      equals in class Object
      Parameters:
      object - the object to compare with this object
      Returns:
      true if the object is the same as this object and false otherwise
      See Also:

    • getAscent

      public int getAscent()
      Returns the ascent of the font described by the receiver. A font's ascent is the distance from the baseline to the top of actual characters, not including any of the leading area, measured in points.
      Returns:
      the ascent of the font

    • getAverageCharacterWidth

      public double getAverageCharacterWidth()
      Returns the average character width, measured in points, of the font described by the receiver.
      Returns:
      the average character width of the font
      Since:
      3.107

    • getAverageCharWidth

      @Deprecated public int getAverageCharWidth()
      Deprecated.
      Use getAverageCharacterWidth() instead
      Returns the average character width, measured in points, of the font described by the receiver.
      Returns:
      the average character width of the font

    • getDescent

      public int getDescent()
      Returns the descent of the font described by the receiver. A font's descent is the distance from the baseline to the bottom of actual characters, not including any of the leading area, measured in points.
      Returns:
      the descent of the font

    • getHeight

      public int getHeight()
      Returns the height of the font described by the receiver, measured in points. A font's height is the sum of its ascent, descent and leading area.
      Returns:
      the height of the font
      See Also:

    • getLeading

      public int getLeading()
      Returns the leading area of the font described by the receiver. A font's leading area is the space above its ascent which may include accents or other marks.
      Returns:
      the leading space of the font

    • hashCode

      public int hashCode()
      Returns an integer hash code for the receiver. Any two objects that return true when passed to equals must return the same value for this method.
      Overrides:
      hashCode in class Object
      Returns:
      the receiver's hash
      See Also:

    • win32_new

      public static FontMetrics win32_new(org.eclipse.swt.internal.win32.TEXTMETRIC handle, int nativeZoom)
      Invokes platform specific functionality to allocate a new font metrics.

      IMPORTANT: This method is not part of the public API for FontMetrics. It is marked public only so that it can be shared within the packages provided by SWT. It is not available on all platforms, and should never be called from application code.

      Parameters:
      handle - the TEXTMETRIC containing information about a font
      nativeZoom - the native zoom of the monitor for which Font Metrics is created
      Returns:
      a new font metrics object containing the specified TEXTMETRIC
      Restriction:
      This method is not intended to be referenced by clients.