org.jfree.report.layout
Class DefaultSizeCalculator

java.lang.Object
  |
  +--org.jfree.report.layout.DefaultSizeCalculator

public class DefaultSizeCalculator

extends java.lang.Object

implements SizeCalculator

An AWT-Based default implementation of an SizeCalculator. This implementation tries to detect the currently used FontRendererContext; some JDKs are unable to return reasonable sizes for the given text.

Author:

Thomas Morgner

See Also:

DefaultSizeCalculator

Inner Class Summary

static class

DefaultSizeCalculator.BuggyFontRendererDetector A helper class that is able to detect whether the implementation is considered buggy.

Fields inherited from interface org.jfree.report.layout.SizeCalculator

CLIP_TEXT, USE_MAX_CHAR_SIZE

Constructor Summary

DefaultSizeCalculator(FontDefinition font, boolean maxLineHeightUsed)
Creates a new size calculator.

Method Summary

static DefaultSizeCalculator	getDefaultSizeCalculator(FontDefinition font, boolean maxLineHeightUsed) Returns an instance.
static DefaultSizeCalculator.BuggyFontRendererDetector	getFrcDetector() Returns a singleon instance of the FontRenderContext bug detector.
float	getLineHeight() Returns the height of the current font.
float	getStringWidth(java.lang.String text, int lineStartPos, int endPos) Calculates the width of the specified String in the current Graphics context.
java.lang.String	toString() Converts this object to a string.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

DefaultSizeCalculator

public DefaultSizeCalculator(FontDefinition font,
                             boolean maxLineHeightUsed)

Creates a new size calculator.

Parameters:

font - the font.

Method Detail

getFrcDetector

public static DefaultSizeCalculator.BuggyFontRendererDetector getFrcDetector()

Returns a singleon instance of the FontRenderContext bug detector.

Returns:

the FontRenderContext-detector

getDefaultSizeCalculator

public static DefaultSizeCalculator getDefaultSizeCalculator(FontDefinition font,
                                                             boolean maxLineHeightUsed)

Returns an instance.

Parameters:

font - The font definition.

Returns:

A default size calculator.

getLineHeight

public float getLineHeight()

Returns the height of the current font. The font height specifies the distance between 2 base lines.

Specified by:

getLineHeight in interface SizeCalculator

Returns:

the font height.

getStringWidth

public float getStringWidth(java.lang.String text,
                            int lineStartPos,
                            int endPos)

Calculates the width of the specified String in the current Graphics context.

Specified by:

getStringWidth in interface SizeCalculator

Parameters:

text - the text to be weighted.

lineStartPos - the start position of the substring to be weighted.

endPos - the position of the last characterto be included in the weightening process.

Returns:

the width of the given string in 1/72" dpi.

toString

public java.lang.String toString()

Converts this object to a string.

Overrides:

toString in class java.lang.Object

Returns:

a string.