/*
* Copyright (c) 2010, Michael Grossmann
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the jo-widgets.org nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*/
package org.jowidgets.spi.impl.swing.common.widgets;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Toolkit;
import javax.swing.JPanel;
import org.jowidgets.common.types.Rectangle;
import org.jowidgets.common.widgets.descriptor.setup.ICanvasSetupCommon;
import org.jowidgets.common.widgets.factory.IGenericWidgetFactory;
import org.jowidgets.spi.controller.IPaintEventSpi;
import org.jowidgets.spi.graphics.IGraphicContextSpi;
import org.jowidgets.spi.graphics.IPaintListenerSpi;
import org.jowidgets.spi.graphics.IPaintObservableSpi;
import org.jowidgets.spi.impl.controller.PaintEventSpiImpl;
import org.jowidgets.spi.impl.controller.PaintObservable;
import org.jowidgets.spi.impl.swing.common.graphics.GraphicContextSpiImpl;
import org.jowidgets.spi.impl.swing.common.util.RectangleConvert;
import org.jowidgets.spi.widgets.ICanvasSpi;
public class CanvasImpl extends SwingComposite implements ICanvasSpi {
public CanvasImpl(final IGenericWidgetFactory factory, final ICanvasSetupCommon setup) {
super(factory, new CanvasPanel());
getUiReference().setDoubleBuffered(setup.isDoubleBuffering());
getUiReference().setBackground(null);
}
@Override
public CanvasPanel getUiReference() {
return (CanvasPanel) super.getUiReference();
}
@Override
public void addPaintListener(final IPaintListenerSpi listener) {
getUiReference().addPaintListener(listener);
}
@Override
public void removePaintListener(final IPaintListenerSpi listener) {
getUiReference().removePaintListener(listener);
}
@Override
public void scroll(
final int sourceX,
final int sourceY,
final int sourceWidth,
final int sourceHeight,
final int destinationX,
final int destinationY) {
final Graphics graphics = getUiReference().getGraphics();
final int dx = destinationX - sourceX;
final int dy = destinationY - sourceY;
final int dirtyX;
final int dirtyWidth;
final int dirtyY;
final int dirtyHeight;
if (dx != 0 && dy != 0) {
dirtyX = sourceX;
dirtyWidth = sourceWidth;
dirtyY = sourceY;
dirtyHeight = sourceHeight;
}
else if (dx < 0 && dy == 0) {
dirtyX = sourceX + sourceWidth + dx;
dirtyWidth = -dx;
dirtyY = sourceY;
dirtyHeight = sourceHeight;
}
else if (dx > 0 && dy == 0) {
dirtyX = sourceX;
dirtyWidth = dx;
dirtyY = sourceY;
dirtyHeight = sourceHeight;
}
else if (dy < 0 && dx == 0) {
dirtyX = sourceX;
dirtyWidth = sourceWidth;
dirtyY = sourceY + sourceHeight + dx;
dirtyHeight = -dy;
}
else if (dy > 0 && dx == 0) {
dirtyX = sourceX;
dirtyWidth = sourceWidth;
dirtyY = sourceY;
dirtyHeight = dy;
}
else {//no scroll, deltas all 0
return;
}
//copy the area to scroll
graphics.copyArea(sourceX, sourceY, sourceWidth, sourceHeight, dx, dy);
//redraw the dirty area
redraw(dirtyX, dirtyY, dirtyWidth, dirtyHeight);
}
@Override
public void redraw(final int x, final int y, final int width, final int height) {
getUiReference().repaint(x, y, width, height);
}
@Override
public void redraw(final boolean sync) {
super.redraw();
if (sync) {
Toolkit.getDefaultToolkit().sync();
}
}
@Override
public void redraw(final int x, final int y, final int width, final int height, final boolean sync) {
redraw(x, y, width, height);
if (sync) {
Toolkit.getDefaultToolkit().sync();
}
}
private static final class CanvasPanel extends JPanel implements IPaintObservableSpi {
private static final long serialVersionUID = -6875610604989809218L;
private final PaintObservable paintObservable;
private CanvasPanel() {
this.paintObservable = new PaintObservable();
}
@Override
public void paint(final Graphics g) {
final Rectangle bounds = RectangleConvert.convert(getBounds());
final IGraphicContextSpi graphicContext = new GraphicContextSpiImpl((Graphics2D) g, bounds);
final IPaintEventSpi paintEvent;
if (g.getClipBounds() != null) {
paintEvent = new PaintEventSpiImpl(graphicContext, RectangleConvert.convert(g.getClipBounds()));
}
else {
paintEvent = new PaintEventSpiImpl(graphicContext);
}
paintObservable.firePaint(paintEvent);
}
@Override
public void addPaintListener(final IPaintListenerSpi listener) {
paintObservable.addPaintListener(listener);
}
@Override
public void removePaintListener(final IPaintListenerSpi listener) {
paintObservable.removePaintListener(listener);
}
}
}