/*
* TextureButton.java 01 oct. 2008
*
* Sweet Home 3D, Copyright (c) 2008 Emmanuel PUYBARET / eTeks <info@eteks.com>
*
* This program 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.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package com.eteks.sweethome3d.swing;
import java.awt.AlphaComposite;
import java.awt.Composite;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Insets;
import java.awt.Point;
import java.awt.RenderingHints;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import javax.swing.BorderFactory;
import javax.swing.JComponent;
import javax.swing.border.EtchedBorder;
/**
* Component displaying an image scaled to fit within its bound.
* @author Emmanuel Puybaret
*/
public class ScaledImageComponent extends JComponent {
private BufferedImage image;
private boolean imageEnlargementEnabled;
/**
* Creates a component that will display no image.
*/
public ScaledImageComponent() {
this(null);
}
/**
* Creates a component that will display the given <code>image</code>
* at a maximum scale equal to 1.
*/
public ScaledImageComponent(BufferedImage image) {
this(image, false);
}
/**
* Creates a component that will display the given <code>image</code>
* with no maximum scale if <code>imageEnlargementEnabled</code> is <code>true</code>.
*/
public ScaledImageComponent(BufferedImage image,
boolean imageEnlargementEnabled) {
this.image = image;
this.imageEnlargementEnabled = imageEnlargementEnabled;
setBorder(BorderFactory.createEtchedBorder(EtchedBorder.LOWERED));
}
/**
* Returns the preferred size of this component.
*/
@Override
public Dimension getPreferredSize() {
if (isPreferredSizeSet()) {
return super.getPreferredSize();
} else {
Insets insets = getInsets();
final int defaultPreferredWidth = 300;
final int defaultPreferredHeight = 300;
if (this.image == null) {
return new Dimension(defaultPreferredWidth + insets.left + insets.right,
defaultPreferredHeight + insets.top + insets.bottom);
} else {
// Compute the component preferred size in such a way
// its bigger dimension (width or height) is 300 pixels
int maxImagePreferredWith = defaultPreferredWidth - insets.left - insets.right;
int maxImagePreferredHeight = defaultPreferredHeight - insets.top - insets.bottom;
float widthScale = (float)this.image.getWidth() / maxImagePreferredWith;
float heightScale = (float)this.image.getHeight() / maxImagePreferredHeight;
if (widthScale > heightScale) {
return new Dimension(defaultPreferredWidth, (int)(image.getHeight() / widthScale) + insets.top + insets.bottom);
} else {
return new Dimension((int)(this.image.getWidth() / heightScale) + insets.left + insets.right, defaultPreferredHeight);
}
}
}
}
@Override
protected void paintComponent(Graphics g) {
if (isOpaque()) {
g.setColor(getBackground());
g.fillRect(0, 0, getWidth(), getHeight());
}
paintImage(g, null);
}
/**
* Paints the image with a given <code>composite</code>.
* Image is scaled to fill width of the component.
*/
protected void paintImage(Graphics g, AlphaComposite composite) {
if (image != null) {
Graphics2D g2D = (Graphics2D)g;
g2D.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
AffineTransform oldTransform = g2D.getTransform();
Composite oldComposite = g2D.getComposite();
Point translation = getImageTranslation();
g2D.translate(translation.x, translation.y);
float scale = getImageScale();
g2D.scale(scale, scale);
if (composite != null) {
g2D.setComposite(composite);
}
// Draw image with composite
g2D.drawImage(this.image, 0, 0, this);
g2D.setComposite(oldComposite);
g2D.setTransform(oldTransform);
}
}
/**
* Sets the image drawn by this component.
*/
public void setImage(BufferedImage image) {
this.image = image;
revalidate();
repaint();
}
/**
* Returns the image drawn by this component.
*/
public BufferedImage getImage() {
return this.image;
}
/**
* Returns the scale used to draw the image of this component.
*/
protected float getImageScale() {
if (this.image != null) {
Insets insets = getInsets();
float imageScale = Math.min((float)(getWidth() - insets.left - insets.right) / image.getWidth(),
(float)(getHeight() - insets.top - insets.bottom) / image.getHeight());
if (this.imageEnlargementEnabled) {
return imageScale;
} else {
return Math.min(1, imageScale);
}
} else {
return 1;
}
}
/**
* Returns the origin point where the image of this component is drawn.
*/
protected Point getImageTranslation() {
float scale = getImageScale();
Insets insets = getInsets();
return new Point(insets.left + (getWidth() - insets.left - insets.right - Math.round(image.getWidth() * scale)) / 2,
insets.top + (getHeight() - insets.top - insets.bottom - Math.round(image.getHeight() * scale)) / 2);
}
/**
* Returns <code>true</code> if point at (<code>x</code>, <code>y</code>)
* is in the image displayed by this component.
*/
protected boolean isPointInImage(int x, int y) {
Point translation = getImageTranslation();
float scale = getImageScale();
return x > translation.x && x < translation.x + Math.round(getImage().getWidth() * scale)
&& y > translation.y && y < translation.y + Math.round(getImage().getHeight() * scale);
}
}