Class 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:
    GC.getFontMetrics(), Sample code and further information
    • 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)
    • Field Detail

      • 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 Detail

      • 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:
        hashCode()
      • 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

        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:
        getAscent(), getDescent(), getLeading()
      • 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:
        equals(java.lang.Object)
      • win32_new

        public static FontMetrics win32_new​(org.eclipse.swt.internal.win32.TEXTMETRIC handle)
        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
        Returns:
        a new font metrics object containing the specified TEXTMETRIC
        Restriction:
        This method is not intended to be referenced by clients.