java.awt.font

Class TextMeasurer

Implemented Interfaces:
Cloneable

public final class TextMeasurer
extends Object
implements Cloneable

TextMeasurer is a small utility class for measuring the length of laid-out text objects.
Since:
1.3

Constructor Summary

TextMeasurer(AttributedCharacterIterator text, FontRenderContext frc)
Creates a TextMeasurer from a given text in the form of an AttributedCharacterIterator and a FontRenderContext.

Method Summary

protected Object
clone()
Clones the TextMeasurer object
void
deleteChar(AttributedCharacterIterator newParagraph, int deletePos)
Update the text if a character is deleted at the position deletePos
float
getAdvanceBetween(int start, int limit)
Returns the total advance between two positions in the paragraph.
TextLayout
getLayout(int start, int limit)
Returns a TextLayout object corresponding to the characters from text to limit.
int
getLineBreakIndex(int start, float maxAdvance)
Returns the line-break index from a given starting index and a maximum advance.
void
insertChar(AttributedCharacterIterator newParagraph, int insertPos)
Update the text if a character is inserted at the position insertPos

Methods inherited from class java.lang.Object

clone, equals, extends Object> getClass, finalize, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

TextMeasurer

public TextMeasurer(AttributedCharacterIterator text,
                    FontRenderContext frc)
Creates a TextMeasurer from a given text in the form of an AttributedCharacterIterator and a FontRenderContext.

Method Details

clone

protected Object clone()
Clones the TextMeasurer object
Overrides:
clone in interface Object

deleteChar

public void deleteChar(AttributedCharacterIterator newParagraph,
                       int deletePos)
Update the text if a character is deleted at the position deletePos
Parameters:
newParagraph - - the updated paragraph.
deletePos - - the deletion position

getAdvanceBetween

public float getAdvanceBetween(int start,
                               int limit)
Returns the total advance between two positions in the paragraph. Characters from start to limit-1 (inclusive) are included in this count.
Parameters:
start - - the starting character index.
limit - - the limiting index.

getLayout

public TextLayout getLayout(int start,
                            int limit)
Returns a TextLayout object corresponding to the characters from text to limit.
Parameters:
start - - the starting character index.
limit - - the limiting index.

getLineBreakIndex

public int getLineBreakIndex(int start,
                             float maxAdvance)
Returns the line-break index from a given starting index and a maximum advance. The index returned is the first character outside the given advance (or the limit of the string, if all remaining characters fit.)
Parameters:
start - - the starting index.
maxAdvance - - the maximum advance allowed.
Returns:
the index of the first character beyond maxAdvance, or the index of the last character + 1.

insertChar

public void insertChar(AttributedCharacterIterator newParagraph,
                       int insertPos)
Update the text if a character is inserted at the position insertPos
Parameters:
newParagraph - - the updated paragraph.
insertPos - - the insertion position

TextMeasurer.java Copyright (C) 2006 Free Software Foundation, Inc. This file is part of GNU Classpath. GNU Classpath is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. GNU Classpath is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GNU Classpath; see the file COPYING. If not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. Linking this library statically or dynamically with other modules is making a combined work based on this library. Thus, the terms and conditions of the GNU General Public License cover the whole combination. As a special exception, the copyright holders of this library give you permission to link this library with independent modules to produce an executable, regardless of the license terms of these independent modules, and to copy and distribute the resulting executable under terms of your choice, provided that you also meet, for each linked independent module, the terms and conditions of the license of that module. An independent module is a module which is not derived from or based on this library. If you modify this library, you may extend this exception to your version of the library, but you are not obligated to do so. If you do not wish to do so, delete this exception statement from your version.