/*
* Preview Dialog - A Preview Dialog for your Swing Applications Copyright (C)
* 2003 Jens Kaiser. Written by: 2003 Jens Kaiser <jens.kaiser@web.de> This
* program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Library 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 Library
* General Public License for more details. You should have received a copy of
* the GNU Library General Public License along with this program; if not, write
* to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139,
* USA.
*/
package org.freeplane.features.print;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.awt.print.PageFormat;
import java.awt.print.Printable;
import java.awt.print.PrinterException;
import javax.swing.JComponent;
import org.freeplane.core.util.LogUtils;
import org.freeplane.view.swing.map.MapView;
class Preview extends JComponent {
final private static int DEFAULT_PREVIEW_SIZE = 300;
final private static double MINIMUM_ZOOM_FACTOR = 0.1;
/**
*
*/
private static final long serialVersionUID = 1L;
private Graphics2D imageGraphics;
protected int index = 0;
private BufferedImage previewPageImage = null;
private final PrintController printController;
private final Printable view;
protected double zoom = 0.0;
public Preview(final PrintController printController, final Printable view, Dimension size) {
this.printController = printController;
this.view = view;
final PageFormat format = getPageFormat();
this.zoom = Math.min(size.getHeight() / format.getHeight(), size.getWidth() / format.getWidth());
resize();
}
public void changeZoom(final double zoom) {
this.zoom = Math.max(Preview.MINIMUM_ZOOM_FACTOR, this.zoom * zoom);
resize();
}
@Override
public Dimension getMinimumSize() {
return getPreferredSize();
}
private PageFormat getPageFormat() {
return printController.getPageFormat();
}
private int getPageHeight(final PageFormat format) {
return (int) (format.getHeight() * zoom);
}
public int getPageIndex() {
return index;
}
private int getPageWidth(final PageFormat format) {
return (int) (format.getWidth() * zoom);
}
public void moveIndex(final int indexStep) {
final int newIndex = index + indexStep;
if (newIndex >= 0) {
index = newIndex;
previewPageImage = null;
}
}
@Override
public void paint(final Graphics g) {
try {
final Graphics2D g2d = (Graphics2D) g;
final PageFormat format = getPageFormat();
paintPaper(g, format);
if (previewPageImage == null) {
previewPageImage = (BufferedImage) createImage(getPageWidth(format) - 1, getPageHeight(format) - 1);
imageGraphics = previewPageImage.createGraphics();
imageGraphics.scale(zoom, zoom);
if(view instanceof MapView)
((MapView)view).preparePrinting();
while (Printable.NO_SUCH_PAGE == view.print(imageGraphics, format, index) && index > 0) {
index --;
}
if(view instanceof MapView)
((MapView)view).endPrinting();
}
g2d.drawImage(previewPageImage, 0, 0, this);
}
catch (final PrinterException e) {
LogUtils.severe(e);
}
}
protected void paintPaper(final Graphics g, final PageFormat format) {
g.setColor(Color.white);
g.fillRect(0, 0, getPageWidth(format), getPageHeight(format));
g.setColor(Color.black);
g.drawRect(0, 0, getPageWidth(format) - 1, getPageHeight(format) - 1);
}
public void resize() {
final PageFormat pageFormat = getPageFormat();
int width = getPageWidth(pageFormat);
int height = getPageHeight(pageFormat);
setPreferredSize(new Dimension(width, height));
previewPageImage = null;
revalidate();
}
}