svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.compat.cdc / org.gvsig.fmap.mapcontext / org.gvsig.fmap.mapcontext.api / src / main / java / org / gvsig / fmap / mapcontext / impl / DefaultMapContextDrawer.java @ 40559
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/**
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* gvSIG. Desktop Geographic Information System.
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*
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* Copyright (C) 2007-2013 gvSIG Association.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 3
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*
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* For any additional information, do not hesitate to contact us
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* at info AT gvsig.com, or visit our website www.gvsig.com.
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*/
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package org.gvsig.fmap.mapcontext.impl; |
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|
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import java.awt.Graphics2D; |
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import java.awt.geom.AffineTransform; |
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import java.awt.image.BufferedImage; |
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import java.util.ArrayList; |
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import java.util.Iterator; |
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import java.util.List; |
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import java.util.NoSuchElementException; |
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|
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import org.gvsig.compat.CompatLocator; |
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import org.gvsig.compat.print.PrintAttributes; |
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import org.gvsig.fmap.dal.exception.ReadException; |
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import org.gvsig.fmap.geom.primitive.Envelope; |
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import org.gvsig.fmap.mapcontext.MapContext; |
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import org.gvsig.fmap.mapcontext.MapContextDrawer; |
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import org.gvsig.fmap.mapcontext.ViewPort; |
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import org.gvsig.fmap.mapcontext.layers.FLayer; |
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import org.gvsig.fmap.mapcontext.layers.FLayerHidesArea; |
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import org.gvsig.fmap.mapcontext.layers.FLayers; |
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import org.gvsig.fmap.mapcontext.layers.LayerDrawEvent; |
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import org.gvsig.fmap.mapcontext.layers.LayersIterator; |
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import org.gvsig.fmap.mapcontext.layers.operations.ComposedLayer; |
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import org.gvsig.fmap.mapcontext.layers.operations.LayerCollection; |
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import org.gvsig.fmap.mapcontext.layers.vectorial.GraphicLayer; |
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import org.gvsig.fmap.mapcontext.rendering.legend.styling.ILabelable; |
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import org.gvsig.tools.task.Cancellable; |
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import org.slf4j.Logger; |
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import org.slf4j.LoggerFactory; |
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|
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public class DefaultMapContextDrawer implements MapContextDrawer { |
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|
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private static final Logger LOG = LoggerFactory |
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.getLogger(DefaultMapContextDrawer.class); |
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|
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private MapContext mapContext = null; |
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private ViewPort viewPort = null; |
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private CachedImage cachedImage = null; |
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private DrawList previousDrawList = null; |
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|
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protected void checkInitialized() { |
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if (mapContext == null || viewPort == null) { |
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throw new IllegalStateException( |
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"MapContext and ViewPort must be set");
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} |
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} |
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|
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public void draw(FLayers root, BufferedImage image, Graphics2D g, |
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Cancellable cancel, double scale) throws ReadException { |
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this.checkInitialized();
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// With viewport changes all layers must be redrawn, discard cache
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if (cachedImage != null && cachedImage.hasChangedViewPortDrawVersion()) { |
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cachedImage = null;
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} |
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AffineTransform aux_at = null; |
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if (isValidFullCachedImage()) {
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aux_at = g.getTransform(); |
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g.drawImage( |
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cachedImage.getFullDrawnImage(), |
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(int) -aux_at.getTranslateX(),
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(int) -aux_at.getTranslateY(),
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null);
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LOG.debug("Drawn full image from the cache, all layers cached");
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return;
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} |
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DrawList drawList = this.createDrawList(root, cancel, scale);
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if (drawList == null || drawList.size() == 0) { |
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return;
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} |
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if (cancel.isCanceled()) {
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cachedImage = null;
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return;
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} |
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int firstLayerToDraw;
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int lastLayerToDraw;
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if (isValidPartialCachedImage(drawList)) {
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firstLayerToDraw = 0;
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lastLayerToDraw = cachedImage.getLastDrawnLayerPosition(); |
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aux_at = g.getTransform(); |
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g.drawImage( |
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cachedImage.getPartialDrawnImage(), |
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(int) -aux_at.getTranslateX(),
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(int) -aux_at.getTranslateY(),
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null);
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cachedImage.updateVersions(mapContext, viewPort); |
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LOG.debug("Reused image of cached layers from 0 to {}",
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new Integer(lastLayerToDraw)); |
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} else {
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if (cachedImage == null) { |
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cachedImage = new CachedImage();
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// Draw all layers
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firstLayerToDraw = 0;
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//lastLayerToDraw = drawList.getLayerCount() - 1;
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lastLayerToDraw = drawList.getLastLayerVisible(viewPort); |
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} else {
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// Draw the first group of layers without changes to be cached
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// next time
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firstLayerToDraw = 0;
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int firstChangedLayer = drawList.getFirstChangedLayer();
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// If negative nothing has changed, so draw all the layers
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lastLayerToDraw = firstChangedLayer < 0 ? drawList
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.getLayerCount() - 1 : firstChangedLayer - 1; |
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} |
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drawList.drawLayers(image, g, firstLayerToDraw, lastLayerToDraw, |
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cancel, scale); |
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cachedImage.setPartialDrawnImage(image, mapContext, viewPort, |
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lastLayerToDraw); |
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} |
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if (cancel.isCanceled()) {
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cachedImage = null;
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return;
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} |
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// Draw the second group of layers not cached
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firstLayerToDraw = lastLayerToDraw + 1;
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lastLayerToDraw = drawList.getLayerCount() - 1;
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drawList.drawLayers(image, g, firstLayerToDraw, lastLayerToDraw, |
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cancel, scale); |
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cachedImage.setFullDrawnImage(image); |
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this.previousDrawList = drawList;
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} |
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private boolean isValidPartialCachedImage(DrawList drawList) { |
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return cachedImage != null |
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&& cachedImage.isValidPartialDrawnImage(mapContext, drawList); |
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} |
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private boolean isValidFullCachedImage() { |
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return cachedImage != null |
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&& cachedImage.isValidFullDrawnImage(mapContext); |
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} |
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private void print(Object layerOrComposed, Graphics2D g, |
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Cancellable cancel, double scale, PrintAttributes properties)
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throws ReadException {
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ILabelable labelable = null;
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ILabelable tmp = null;
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if (layerOrComposed instanceof ILabelable) { |
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tmp = (ILabelable) layerOrComposed; |
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if (tmp.isLabeled() && tmp.getLabelingStrategy() != null |
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&& tmp.getLabelingStrategy().shouldDrawLabels(scale)) { |
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labelable = tmp; |
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} |
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} |
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if (layerOrComposed instanceof FLayer) { |
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FLayer layer = (FLayer) layerOrComposed; |
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layer.print(g, viewPort, cancel, scale, properties); |
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} else {
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ComposedLayer composed = (ComposedLayer) layerOrComposed; |
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composed.print(g, viewPort, cancel, scale, properties); |
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} |
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if (labelable != null) { |
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labelable.printLabels(g, viewPort, cancel, scale, properties); |
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} |
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} |
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public void setMapContext(MapContext mapContext) { |
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if (this.mapContext == mapContext) { |
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return;
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} |
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this.clean();
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this.mapContext = mapContext;
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} |
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public void setViewPort(ViewPort viewPort) { |
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if (this.viewPort == viewPort) { |
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return;
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} |
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this.clean();
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this.viewPort = viewPort;
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} |
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protected void clean() { |
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this.cachedImage = null; |
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} |
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public class CachedImage { |
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private BufferedImage partialDrawnImage; |
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private BufferedImage fullDrawnImage; |
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private long lastMapContextVersion; |
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private long lastViewPortVersion; |
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private int lastDrawnLayerPosition; |
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public void setPartialDrawnImage(BufferedImage partialDrawnImage, |
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MapContext mapContext, ViewPort viewPort, |
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int lastDrawnLayerPosition) {
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this.partialDrawnImage = CompatLocator.getGraphicsUtils()
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.copyBufferedImage(partialDrawnImage); |
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this.lastDrawnLayerPosition = lastDrawnLayerPosition;
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updateVersions(mapContext, viewPort); |
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} |
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public void updateVersions(MapContext mapContext, ViewPort viewPort) { |
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this.lastMapContextVersion = mapContext.getDrawVersion();
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this.lastViewPortVersion = viewPort.getDrawVersion();
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} |
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public void setFullDrawnImage(BufferedImage fullDrawnImage) { |
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this.fullDrawnImage = CompatLocator.getGraphicsUtils()
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.copyBufferedImage(fullDrawnImage); |
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} |
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public BufferedImage getPartialDrawnImage() { |
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return partialDrawnImage;
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} |
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public BufferedImage getFullDrawnImage() { |
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return fullDrawnImage;
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} |
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public long getMapContextVersion() { |
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return lastMapContextVersion;
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} |
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public int getLastDrawnLayerPosition() { |
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return this.lastDrawnLayerPosition; |
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} |
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public boolean isValidFullDrawnImage(MapContext context) { |
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// If the MapContext version has not changed, there are not any
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// changes that require redrawing any of the layers.
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return fullDrawnImage != null && !hasChangedMapContextDrawVersion(); |
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} |
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public boolean hasChangedMapContextDrawVersion() { |
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// This change detects changes in layers and the viewport also
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return mapContext.getDrawVersion() != this.lastMapContextVersion; |
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} |
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public boolean hasChangedViewPortDrawVersion() { |
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// This change detects changes in the viewport
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return viewPort.getDrawVersion() != this.lastViewPortVersion; |
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} |
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public boolean isValidPartialDrawnImage(MapContext context, |
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DrawList drawList) { |
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if (!hasChangedMapContextDrawVersion()) {
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// Nothing has changed
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return true; |
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} |
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if (partialDrawnImage == null || hasChangedViewPortDrawVersion()) { |
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// No image available or changes in view port
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return false; |
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} |
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if (drawList.size() < lastDrawnLayerPosition + 1) { |
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// New list has fewer layers than before
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return false; |
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} |
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// There is any change in the layers drawn in the partial drawn
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// image?
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return drawList.getFirstChangedLayer() > lastDrawnLayerPosition;
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} |
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} |
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public class DrawList { |
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private List layers = new ArrayList(); |
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private List all = new ArrayList(); |
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private List versions = new ArrayList(); |
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private DrawList previosList = null; |
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private int firstLayerChanged = -1; |
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|
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public DrawList() {
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} |
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public DrawList(DrawList previousList) {
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if (previousList != null) { |
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this.firstLayerChanged = previousList.getLayerCount();
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this.previosList = previousList;
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} |
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} |
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public int getLayerCount() { |
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return this.layers.size(); |
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} |
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public int getLastLayerVisible(ViewPort viewPort) { |
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Envelope area = viewPort.getAdjustedEnvelope(); |
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for( int n=0; n<this.layers.size()-1; n++ ) { |
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FLayer layer = (FLayer) this.layers.get(n);
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if( layer instanceof FLayerHidesArea ) { |
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if( ((FLayerHidesArea)(layer)).hidesThisArea(area) ) {
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return n;
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} |
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} |
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} |
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return this.layers.size()-1; |
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} |
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private boolean hasChanged(FLayer layer, int pos) { |
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FLayer previous = (FLayer) this.previosList.layers.get(pos);
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// String previousName = previous.getName();
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// String layerName = layer.getName();
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if (previous != layer) {
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return true; |
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} |
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long previousVersion = ((Long) this.previosList.versions.get(pos)) |
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.longValue(); |
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long layerVersion = layer.getDrawVersion();
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return previousVersion != layerVersion;
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} |
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public void add(Object obj) { |
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if (obj instanceof FLayer) { |
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FLayer layer = (FLayer) obj; |
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int curIndex = this.layers.size(); |
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if (this.firstLayerChanged >= curIndex) { |
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if (this.previosList.getLayerCount() > curIndex) { |
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if (this.hasChanged(layer, curIndex)) { |
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this.firstLayerChanged = curIndex;
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} |
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} else if (this.previosList.getLayerCount() == curIndex) { |
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this.firstLayerChanged = curIndex;
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} |
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} |
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this.layers.add(layer);
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this.versions.add(new Long(layer.getDrawVersion())); |
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} else if (!(obj instanceof LayersGroupEvent)) { |
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throw new UnsupportedOperationException(); |
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} |
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|
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this.all.add(obj);
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} |
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|
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public int size() { |
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return this.all.size(); |
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} |
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|
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public int getFirstChangedLayer() { |
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if (this.firstLayerChanged > this.layers.size()) { |
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this.firstLayerChanged = this.layers.size(); |
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} |
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return this.firstLayerChanged; |
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} |
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|
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public FLayer getLayer(int pos) { |
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return (FLayer) this.layers.get(pos); |
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} |
383 |
|
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public Object get(int pos) { |
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return this.all.get(pos); |
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} |
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|
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public void drawLayers(BufferedImage image, Graphics2D g, |
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int firstLayerToDraw, int lastLayerToDraw, Cancellable cancel, |
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double scale) throws ReadException { |
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|
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if (firstLayerToDraw > lastLayerToDraw) {
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LOG.debug("Nothing to draw");
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return;
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} |
396 |
|
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// Find the real layer positions excluding LayersGroupEvents
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FLayer firstLayer = (FLayer) layers.get(firstLayerToDraw); |
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int firstLayerPos = all.indexOf(firstLayer);
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// Look if it belongs to a group and start it
|
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if (firstLayerPos > 0) { |
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for (int i = firstLayerPos - 1; i > 0; i++) { |
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Object group = all.get(i);
|
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if (group instanceof LayersGroupEvent) { |
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LayersGroupEvent event = (LayersGroupEvent) group; |
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if (event.type == LayersGroupEvent.IN_Event) {
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event.group.beginDraw(g, viewPort); |
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} |
409 |
break;
|
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} |
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} |
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} |
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FLayer lastLayer = (FLayer) layers.get(lastLayerToDraw); |
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int lastLayerPos = all.indexOf(lastLayer);
|
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|
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LOG.debug("Drawing from layer {} in position (layers: {}, all: {})"
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+ " to layer {} in position (layers: {}, all: {})",
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new Object[] { firstLayer, new Integer(firstLayerToDraw), |
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new Integer(firstLayerPos), lastLayer, |
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new Integer(lastLayerToDraw), |
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new Integer(lastLayerPos) }); |
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|
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ComposedLayer composed = null;
|
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for (int pos = firstLayerPos; pos <= lastLayerPos; pos++) { |
425 |
if (cancel.isCanceled()) {
|
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return;
|
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} |
428 |
|
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Object layerOrGroup = get(pos);
|
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|
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// Group drawing events management
|
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if (layerOrGroup instanceof LayersGroupEvent) { |
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LayersGroupEvent event = (LayersGroupEvent) layerOrGroup; |
434 |
if (event.type == LayersGroupEvent.IN_Event) {
|
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event.group.beginDraw(g, viewPort); |
436 |
} else {
|
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event.group.endDraw(g, viewPort); |
438 |
} |
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} else {
|
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FLayer layer = (FLayer) layerOrGroup; |
441 |
if (composed != null && composed.canAdd(layer)) { |
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// Previous or current layer could be composed
|
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// Add current layer
|
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addToComposedLayer(composed, layer); |
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} else {
|
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if (composed != null) { |
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// Current layer can't be composed on the previous
|
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// composedlayer. Draw previous composed
|
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LOG.debug("Drawing composed layer {} ", composed);
|
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draw(composed, image, g, cancel, scale); |
451 |
composed = null;
|
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} |
453 |
|
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// Try if the current layer can be composed
|
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// Create new composed or draw current layer
|
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composed = layer.newComposedLayer(); |
457 |
if (composed == null) { |
458 |
LOG.debug("Drawing layer {} ", layer);
|
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draw(layer, image, g, cancel, scale); |
460 |
} else {
|
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addToComposedLayer(composed, layer); |
462 |
} |
463 |
} |
464 |
} |
465 |
} |
466 |
if (composed != null) { |
467 |
// Draw the pending composed
|
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draw(composed, image, g, cancel, scale); |
469 |
} |
470 |
|
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// Check if the last layer is the last of a group and close it
|
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for (int i = lastLayerPos + 1; i < all.size(); i++) { |
473 |
Object group = all.get(i);
|
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if (group instanceof LayersGroupEvent) { |
475 |
LayersGroupEvent event = (LayersGroupEvent) group; |
476 |
if (event.type == LayersGroupEvent.OUT_Event) {
|
477 |
event.group.endDraw(g, viewPort); |
478 |
} |
479 |
break;
|
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} |
481 |
} |
482 |
} |
483 |
|
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private void addToComposedLayer(ComposedLayer composed, FLayer layer) |
485 |
throws ReadException {
|
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try {
|
487 |
LOG.debug("Adding layer {} to composed layer ", layer, composed);
|
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composed.add(layer); |
489 |
} catch (Exception e) { |
490 |
throw new ReadException("DefalutMapContexDrawer exception", e); |
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} |
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} |
493 |
|
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private void draw(Object layerOrComposed, BufferedImage image, |
495 |
Graphics2D g, Cancellable cancel, double scale) |
496 |
throws ReadException {
|
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ILabelable labelable = null;
|
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ILabelable tmp = null;
|
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if (layerOrComposed instanceof ILabelable) { |
500 |
|
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tmp = (ILabelable) layerOrComposed; |
502 |
|
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if (tmp.isLabeled() && tmp.getLabelingStrategy() != null |
504 |
&& tmp.getLabelingStrategy().shouldDrawLabels(scale)) { |
505 |
labelable = tmp; |
506 |
} |
507 |
} |
508 |
|
509 |
if (layerOrComposed instanceof FLayer) { |
510 |
int beforeDrawEventType;
|
511 |
int afterDrawEventType;
|
512 |
if (layerOrComposed instanceof GraphicLayer) { |
513 |
beforeDrawEventType = LayerDrawEvent.GRAPHICLAYER_BEFORE_DRAW; |
514 |
afterDrawEventType = LayerDrawEvent.GRAPHICLAYER_AFTER_DRAW; |
515 |
} else {
|
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beforeDrawEventType = LayerDrawEvent.LAYER_BEFORE_DRAW; |
517 |
afterDrawEventType = LayerDrawEvent.LAYER_AFTER_DRAW; |
518 |
} |
519 |
FLayer layer = (FLayer) layerOrComposed; |
520 |
drawLayer(layer, image, g, cancel, scale, beforeDrawEventType, |
521 |
afterDrawEventType); |
522 |
} else {
|
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ComposedLayer composed = (ComposedLayer) layerOrComposed; |
524 |
composed.draw(image, g, viewPort, cancel, scale); |
525 |
} |
526 |
if (labelable != null) { |
527 |
labelable.drawLabels(image, g, viewPort, cancel, scale, |
528 |
MapContext.getScreenDPI()); |
529 |
} |
530 |
|
531 |
} |
532 |
|
533 |
protected void drawLayer(FLayer layer, BufferedImage image, |
534 |
Graphics2D g, Cancellable cancel, double scale, |
535 |
int beforeDrawEventType, int afterDrawEventType) |
536 |
throws ReadException {
|
537 |
LayerDrawEvent event = new LayerDrawEvent(layer, g, viewPort, beforeDrawEventType);
|
538 |
mapContext.fireLayerDrawingEvent(event); |
539 |
layer.draw(image, g, viewPort, cancel, scale); |
540 |
event = new LayerDrawEvent(layer, g, viewPort, afterDrawEventType);
|
541 |
mapContext.fireLayerDrawingEvent(event); |
542 |
} |
543 |
|
544 |
} |
545 |
|
546 |
private class SimpleLayerIterator extends LayersIterator { |
547 |
|
548 |
public SimpleLayerIterator(FLayer layer) {
|
549 |
this.appendLayer(layer);
|
550 |
} |
551 |
|
552 |
public boolean evaluate(FLayer layer) { |
553 |
if (layer instanceof FLayers) { |
554 |
return false; |
555 |
} |
556 |
return layer.isAvailable() && layer.isVisible();
|
557 |
} |
558 |
|
559 |
} |
560 |
|
561 |
public void dispose() { |
562 |
this.mapContext = null; |
563 |
this.viewPort = null; |
564 |
this.cachedImage = null; |
565 |
this.previousDrawList = null; |
566 |
} |
567 |
|
568 |
public void print(FLayers root, Graphics2D g, Cancellable cancel, |
569 |
double scale, PrintAttributes properties) throws ReadException { |
570 |
this.checkInitialized();
|
571 |
|
572 |
List printList = this.createPrintList(root, cancel); |
573 |
if (cancel.isCanceled()) {
|
574 |
return;
|
575 |
} |
576 |
|
577 |
ComposedLayer composed = null;
|
578 |
int pos;
|
579 |
FLayer layer; |
580 |
int layerPos = -1; |
581 |
Object obj;
|
582 |
LayersGroupEvent event; |
583 |
for (pos = 0; pos < printList.size(); pos++) { |
584 |
if (cancel.isCanceled()) {
|
585 |
return;
|
586 |
} |
587 |
|
588 |
obj = printList.get(pos); |
589 |
if (obj instanceof LayersGroupEvent) { |
590 |
event = (LayersGroupEvent) obj; |
591 |
if (event.type == LayersGroupEvent.IN_Event) {
|
592 |
// System.out.println("=======Empiza a pintar grupo de capas "+
|
593 |
// ((FLayers)event.group).getName() +"============");
|
594 |
event.group.beginDraw(g, viewPort); |
595 |
} else {
|
596 |
event.group.endDraw(g, viewPort); |
597 |
// System.out.println("=======Fin a pintar grupo de capas "+
|
598 |
// ((FLayers)event.group).getName() +"============");
|
599 |
|
600 |
} |
601 |
continue;
|
602 |
} |
603 |
layerPos++; |
604 |
|
605 |
layer = (FLayer) obj; |
606 |
|
607 |
// *** Pintado de capa/composicion de capa ***
|
608 |
if (composed == null) { |
609 |
composed = layer.newComposedLayer(); |
610 |
if (composed != null) { |
611 |
try {
|
612 |
composed.add(layer); |
613 |
// System.out.println("=======Imprimiendo composicion de pintado "+
|
614 |
// (layerPos-1)+" ============");
|
615 |
continue;
|
616 |
} catch (Exception e) { |
617 |
throw new ReadException( |
618 |
"DefaultMapContexDrawer exception", e);
|
619 |
} |
620 |
} |
621 |
} else {
|
622 |
if (composed.canAdd(layer)) {
|
623 |
try {
|
624 |
composed.add(layer); |
625 |
// System.out.println("=== a?adiendo a composicion de pintado "+
|
626 |
// layerPos+ " "+layer.getName());
|
627 |
continue;
|
628 |
} catch (Exception e) { |
629 |
throw new ReadException( |
630 |
"DefaultMapContexDrawer exception", e);
|
631 |
} |
632 |
} else {
|
633 |
// System.out.println("=======Imprimiendo composicion de pintado "+
|
634 |
// (layerPos-1)+" ============");
|
635 |
this.print(composed, g, cancel, scale, properties);
|
636 |
// composed.print( g, viewPort, cancel, scale,properties);
|
637 |
composed = layer.newComposedLayer(); |
638 |
if (composed != null) { |
639 |
try {
|
640 |
composed.add(layer); |
641 |
// System.out.println("=== a?adiendo a composicion de pintado "+
|
642 |
// layerPos+ " "+layer.getName());
|
643 |
continue;
|
644 |
} catch (Exception e) { |
645 |
throw new ReadException( |
646 |
"DefaultMapContexDrawer exception", e);
|
647 |
} |
648 |
} |
649 |
} |
650 |
} |
651 |
// System.out.println("=== imprimiendo "+ layerPos+
|
652 |
// " "+layer.getName());
|
653 |
this.print(layer, g, cancel, scale, properties);
|
654 |
// layer.print(g, viewPort, cancel, scale,properties);
|
655 |
// *** Pintado de capa/composicion de capa ***
|
656 |
if (composed != null) { |
657 |
// si la composicion no se ha pintado la pintamos
|
658 |
// System.out.println("=======Imprimiendo composicion de pintado "+
|
659 |
// (layerPos-1)+" (ultimo) ============");
|
660 |
this.print(composed, g, cancel, scale, properties);
|
661 |
// composed.print(g, viewPort, cancel, scale, properties);
|
662 |
composed = null;
|
663 |
} |
664 |
} |
665 |
|
666 |
} |
667 |
|
668 |
private DrawList createDrawList(FLayers root, Cancellable cancel,
|
669 |
double scale) {
|
670 |
DrawList result = new DrawList(this.previousDrawList); |
671 |
Iterator iter = new MyLayerIterator((FLayer) root, scale); |
672 |
while (iter.hasNext()) {
|
673 |
if (cancel.isCanceled()) {
|
674 |
return null; |
675 |
} |
676 |
result.add(iter.next()); |
677 |
} |
678 |
if (cancel.isCanceled()) {
|
679 |
return null; |
680 |
} |
681 |
// Take into account also the Graphic layer
|
682 |
result.add(mapContext.getGraphicsLayer()); |
683 |
return result;
|
684 |
} |
685 |
|
686 |
private List createPrintList(FLayers root, Cancellable cancel) { |
687 |
List result = new ArrayList(); |
688 |
Iterator iter = new SimpleLayerIterator((FLayer) root); |
689 |
while (iter.hasNext()) {
|
690 |
if (cancel.isCanceled()) {
|
691 |
return null; |
692 |
} |
693 |
result.add(iter.next()); |
694 |
} |
695 |
return result;
|
696 |
} |
697 |
|
698 |
private class MyLayerIterator implements Iterator { |
699 |
List layersList = new ArrayList(); |
700 |
int index = 0; |
701 |
double scale = 0; |
702 |
|
703 |
public MyLayerIterator(FLayer layer, double scale) { |
704 |
this.scale = scale;
|
705 |
this.appendLayer(layer);
|
706 |
} |
707 |
|
708 |
protected void appendLayer(FLayer layer) { |
709 |
if (layer instanceof LayerCollection) { |
710 |
appendLayers((LayerCollection) layer); |
711 |
} else if (this.evaluate(layer)) { |
712 |
layersList.add(layer); |
713 |
} |
714 |
} |
715 |
|
716 |
private void appendLayers(LayerCollection layers) { |
717 |
int i;
|
718 |
layersList.add(new LayersGroupEvent(layers,
|
719 |
LayersGroupEvent.IN_Event)); |
720 |
for (i = 0; i < layers.getLayersCount(); i++) { |
721 |
appendLayer(layers.getLayer(i)); |
722 |
} |
723 |
layersList.add(new LayersGroupEvent(layers,
|
724 |
LayersGroupEvent.OUT_Event)); |
725 |
} |
726 |
|
727 |
public void remove() { |
728 |
throw new UnsupportedOperationException(); |
729 |
} |
730 |
|
731 |
public boolean hasNext() { |
732 |
return index < layersList.size();
|
733 |
} |
734 |
|
735 |
public Object next() { |
736 |
if (!this.hasNext()) { |
737 |
throw new NoSuchElementException(); |
738 |
} |
739 |
Object aux = layersList.get(index);
|
740 |
index++; |
741 |
return aux;
|
742 |
} |
743 |
|
744 |
public boolean evaluate(FLayer layer) { |
745 |
if (layer instanceof LayerCollection) { |
746 |
return false; |
747 |
} |
748 |
return layer.isAvailable() && layer.isVisible()
|
749 |
&& layer.isWithinScale(this.scale);
|
750 |
} |
751 |
|
752 |
} |
753 |
|
754 |
private class LayersGroupEvent { |
755 |
public static final String IN_Event = "in"; |
756 |
public static final String OUT_Event = "Out"; |
757 |
|
758 |
private LayerCollection group = null; |
759 |
private String type = IN_Event; |
760 |
|
761 |
public LayersGroupEvent(LayerCollection group, String type) { |
762 |
this.group = group;
|
763 |
this.type = type;
|
764 |
} |
765 |
|
766 |
public String getType() { |
767 |
return type;
|
768 |
} |
769 |
|
770 |
public LayerCollection getGroup() {
|
771 |
return group;
|
772 |
} |
773 |
} |
774 |
|
775 |
} |