/*
* $Id: TextPainter.java 3471 2009-08-27 13:10:39Z kleopatra $
*
* Copyright 2004 Sun Microsystems, Inc., 4150 Network Circle,
* Santa Clara, California 95054, U.S.A. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
package org.hdesktop.swingx.painter;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics2D;
import java.awt.Paint;
import java.awt.Rectangle;
import java.awt.Shape;
import java.awt.font.GlyphVector;
import javax.swing.AbstractButton;
import javax.swing.JComponent;
import javax.swing.JLabel;
import javax.swing.text.JTextComponent;
import org.hdesktop.swingx.painter.effects.AreaEffect;
/**
* A painter which draws text. If the font, text, and paint are not provided they will be
* obtained from the object being painted if it is a Swing text component.
*
* @author rbair
*/
public class TextPainter extends AbstractAreaPainter<Object> {
private String text = "";
private Font font = null;
/** Creates a new instance of TextPainter */
public TextPainter() {
this("");
}
/**
* Create a new TextPainter which will paint the specified text
* @param text the text to paint
*/
public TextPainter(String text) {
this(text, null, null);
}
/**
* Create a new TextPainter which will paint the specified text with the specified font.
* @param text the text to paint
* @param font the font to paint the text with
*/
public TextPainter(String text, Font font) {
this(text, font, null);
}
/**
* Create a new TextPainter which will paint the specified text with the specified paint.
* @param text the text to paint
* @param paint the paint to paint with
*/
public TextPainter(String text, Paint paint) {
this(text, null, paint);
}
/**
* Create a new TextPainter which will paint the specified text with the specified font and paint.
* @param text the text to paint
* @param font the font to paint the text with
* @param paint the paint to paint with
*/
public TextPainter(String text, Font font, Paint paint) {
this.text = text;
this.font = font;
setFillPaint(paint);
}
/**
* Set the font (and font size and style) to be used when drawing the text
* @param f the new font
*/
public void setFont(Font f) {
Font old = getFont();
this.font = f;
setDirty(true);
firePropertyChange("font", old, getFont());
}
/**
* gets the font (and font size and style) to be used when drawing the text
* @return the current font
*/
public Font getFont() {
return font;
}
/**
* Sets the text to draw
* @param text the text to draw
*/
public void setText(String text) {
String old = getText();
this.text = text == null ? "" : text;
setDirty(true);
firePropertyChange("text", old, getText());
}
/**
* gets the text currently used to draw
* @return the text to be drawn
*/
public String getText() {
return text;
}
/**
* {@inheritDoc}
*/
@Override
protected void doPaint(Graphics2D g, Object component, int width, int height) {
Font font = calculateFont(component);
if (font != null) {
g.setFont(font);
}
Paint paint = getFillPaint();
if(paint == null) {
if(component instanceof JComponent) {
paint = ((JComponent)component).getForeground();
}
}
String text = calculateText(component);
// get the font metrics
FontMetrics metrics = g.getFontMetrics(g.getFont());
//Rectangle2D rect = metrics.getStringBounds(text,g);
int tw = metrics.stringWidth(text);
int th = metrics.getHeight();
Rectangle res = calculateLayout(tw, th, width, height);
g.translate(res.x, res.y);
if(isPaintStretched()) {
paint = calculateSnappedPaint(paint, res.width, res.height);
}
if (paint != null) {
g.setPaint(paint);
}
g.drawString(text, 0, 0 + metrics.getAscent());
if(getAreaEffects() != null) {
Shape shape = provideShape(g, component, width, height);
for(AreaEffect ef : getAreaEffects()) {
ef.apply(g, shape, width, height);
}
}
g.translate(-res.x,-res.y);
}
private String calculateText(final Object component) {
// prep the text
String text = getText();
//make components take priority if(text == null || text.trim().equals("")) {
if(text != null && !text.trim().equals("")) {
return text;
}
if(component instanceof JTextComponent) {
text = ((JTextComponent)component).getText();
}
if(component instanceof JLabel) {
text = ((JLabel)component).getText();
}
if(component instanceof AbstractButton) {
text = ((AbstractButton)component).getText();
}
return text;
}
private Font calculateFont(final Object component) {
// prep the various text attributes
Font font = getFont();
if (font == null) {
if(component instanceof JComponent) {
font = ((JComponent)component).getFont();
}
}
if (font == null) {
font = new Font("Dialog", Font.PLAIN, 18);
}
return font;
}
/**
* {@inheritDoc}
*/
@Override
protected Shape provideShape(Graphics2D g2, Object comp, int width, int height) {
Font font = calculateFont(comp);
String text = calculateText(comp);
FontMetrics metrics = g2.getFontMetrics(font);
GlyphVector vect = font.createGlyphVector(g2.getFontRenderContext(),text);
return vect.getOutline(0f,0f+ metrics.getAscent());
}
}