/**
* Copyright (C) 2002-2012 The FreeCol Team
*
* This file is part of FreeCol.
*
* FreeCol 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 of the License, or
* (at your option) any later version.
*
* FreeCol 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 FreeCol. If not, see <http://www.gnu.org/licenses/>.
*/
package net.sf.freecol.client.gui.plaf;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.font.LineBreakMeasurer;
import java.awt.font.FontRenderContext;
import java.awt.font.TextLayout;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.text.AttributedCharacterIterator;
import java.text.AttributedString;
import java.util.regex.Pattern;
import javax.swing.JComponent;
import javax.swing.JToolTip;
import javax.swing.plaf.ComponentUI;
import javax.swing.plaf.basic.BasicToolTipUI;
import net.sf.freecol.client.gui.ImageLibrary;
/**
* Draw the "background.FreeColToolTip" resource as a tiled background
* image on tool tip popups.
*/
public class FreeColToolTipUI extends BasicToolTipUI {
private static FreeColToolTipUI sharedInstance = new FreeColToolTipUI();
// TODO: find out why we can't use the FontRenderContext of the
// component. And should we use fractional metrics?
private static FontRenderContext frc = new FontRenderContext(null, true, false);
private static int margin = 5;
private static int maximumWidth = 300;
private static final Pattern lineBreak = Pattern.compile("\n");
private FreeColToolTipUI() {
super();
}
public static ComponentUI createUI(JComponent c) {
return sharedInstance;
}
/**
* Describe <code>setMaximumWidth</code> method here.
*
* @param width an <code>int</code> value
*/
public static void setMaximumWidth(int width) {
maximumWidth = width;
}
public void paint(Graphics g, JComponent c) {
if (c.isOpaque()) {
ImageLibrary.drawTiledImage("background.FreeColToolTip", g, c, null);
}
// TODO: find out why this is necessary
g.setColor(Color.BLACK);
Graphics2D graphics = (Graphics2D) g;
float x = margin;
float y = margin;
for (String line : lineBreak.split(((JToolTip) c).getTipText())) {
AttributedCharacterIterator styledText =
new AttributedString(line).getIterator();
LineBreakMeasurer measurer = new LineBreakMeasurer(styledText, frc);
while (measurer.getPosition() < styledText.getEndIndex()) {
TextLayout layout = measurer.nextLayout(maximumWidth);
y += (layout.getAscent());
float dx = layout.isLeftToRight() ?
0 : (maximumWidth - layout.getAdvance());
layout.draw(graphics, x + dx, y);
y += layout.getDescent() + layout.getLeading();
}
}
}
public Dimension getPreferredSize(JComponent c) {
String tipText = ((JToolTip)c).getTipText();
if (tipText == null) {
return new Dimension(0, 0);
}
float x = 0f;
float y = 0f;
for (String line : lineBreak.split(((JToolTip) c).getTipText())) {
AttributedCharacterIterator styledText
= new AttributedString(line).getIterator();
LineBreakMeasurer measurer = new LineBreakMeasurer(styledText, frc);
while (measurer.getPosition() < styledText.getEndIndex()) {
TextLayout layout = measurer.nextLayout(maximumWidth);
x = Math.max(x, layout.getVisibleAdvance());
y += layout.getAscent() + layout.getDescent() + layout.getLeading();
}
}
return new Dimension((int) (x + 2 * margin),
(int) (y + 2 * margin));
}
public Dimension getMinimumSize(JComponent c) {
return getPreferredSize(c);
}
public Dimension getMaximumSize(JComponent c) {
return getPreferredSize(c);
}
}