001/* ============
002 * FXGraphics2D
003 * ============
004 * 
005 * (C)opyright 2014-2020, by Object Refinery Limited.
006 * 
007 * http://www.jfree.org/fxgraphics2d/index.html
008 *
009 * The FXGraphics2D class has been developed by Object Refinery Limited for 
010 * use in Orson Charts (http://www.object-refinery.com/orsoncharts) and
011 * JFreeChart (http://www.jfree.org/jfreechart).  It may be useful for other
012 * code that uses the Graphics2D API provided by Java2D.
013 * 
014 * Redistribution and use in source and binary forms, with or without
015 * modification, are permitted provided that the following conditions are met:
016 *   - Redistributions of source code must retain the above copyright
017 *     notice, this list of conditions and the following disclaimer.
018 *   - Redistributions in binary form must reproduce the above copyright
019 *     notice, this list of conditions and the following disclaimer in the
020 *     documentation and/or other materials provided with the distribution.
021 *   - Neither the name of the Object Refinery Limited nor the
022 *     names of its contributors may be used to endorse or promote products
023 *     derived from this software without specific prior written permission.
024 *
025 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
026 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
027 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
028 * ARE DISCLAIMED. IN NO EVENT SHALL OBJECT REFINERY LIMITED BE LIABLE FOR ANY
029 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
030 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
031 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
032 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
033 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
034 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
035 * 
036 */
037
038package org.jfree.fx;
039
040import java.awt.Font;
041import java.awt.FontMetrics;
042import java.awt.Graphics;
043import java.awt.Graphics2D;
044import java.awt.geom.Rectangle2D;
045import java.text.CharacterIterator;
046import javafx.geometry.Bounds;
047import javafx.scene.text.FontPosture;
048import javafx.scene.text.FontWeight;
049import javafx.scene.text.Text;
050
051/**
052 * A font metrics implementation for JavaFX.  This uses the JavaFX APIs to
053 * get font measurements, which is more exact than relying on the equivalent
054 * Java2D APIs.
055 * 
056 * @since 1.5
057 */
058public class FXFontMetrics extends FontMetrics {
059    
060    private Graphics2D g2;
061    
062    /**
063     * Creates a new instance.
064     * 
065     * @param font  the font ({@code null} not permitted).
066     * @param g2  the graphics target ({@code null} not permitted).
067     */
068    public FXFontMetrics(Font font, Graphics2D g2) {
069        super(font);
070        this.g2 = g2;
071    }
072
073    @Override
074    public Rectangle2D getStringBounds(CharacterIterator ci, int beginIndex, 
075            int limit, Graphics context) {
076        char[]  arr = new char[limit - beginIndex];
077        ci.setIndex(beginIndex);
078        for(int idx = 0; idx < arr.length; idx++) {
079            arr[idx] = ci.current();
080            ci.next();
081        }
082        return getStringBounds(arr, beginIndex, limit, context);
083    }
084
085    @Override
086    public Rectangle2D getStringBounds(char[] chars, int beginIndex, int limit, 
087            Graphics context) {
088        String str = new String(chars, beginIndex, limit - beginIndex);
089        return getStringBounds(str, context);
090    }
091
092    @Override
093    public Rectangle2D getStringBounds(String str, int beginIndex, int limit, 
094            Graphics context) {
095        String substr = str.substring(beginIndex, limit);
096        return super.getStringBounds(substr, context);
097    }
098
099    @Override
100    public Rectangle2D getStringBounds(String str, Graphics context) {
101        Text text = new Text(str);
102        FontWeight weight = font.isBold() ? FontWeight.BOLD : FontWeight.NORMAL;
103        FontPosture posture = font.isItalic() 
104                ? FontPosture.ITALIC : FontPosture.REGULAR;
105        javafx.scene.text.Font jfxfont = javafx.scene.text.Font.font(
106                font.getFamily(), weight, posture, font.getSize());
107        text.setFont(jfxfont);
108        Bounds b = text.getLayoutBounds();
109        return new Rectangle2D.Double(b.getMinX(), b.getMinY(), b.getWidth(), 
110                b.getHeight());
111    }
112
113    @Override
114    public int stringWidth(String str) {
115        return (int) getStringBounds(str, this.g2).getWidth();
116    }
117    
118}