Java tutorial
/* ****************************************************************************** * Copyright (c) 2006-2012 XMind Ltd. and others. * * This file is a part of XMind 3. XMind releases 3 and * above are dual-licensed under the Eclipse Public License (EPL), * which is available at http://www.eclipse.org/legal/epl-v10.html * and the GNU Lesser General Public License (LGPL), * which is available at http://www.gnu.org/licenses/lgpl.html * See http://www.xmind.net/license.html for details. * * Contributors: * XMind Ltd. - initial API and implementation *******************************************************************************/ package org.xmind.ui.internal.mindmap; import org.eclipse.draw2d.IFigure; import org.eclipse.draw2d.Label; import org.eclipse.draw2d.geometry.Dimension; import org.eclipse.draw2d.geometry.Point; import org.eclipse.jface.resource.JFaceResources; import org.eclipse.jface.resource.LocalResourceManager; import org.eclipse.jface.resource.ResourceManager; import org.eclipse.swt.graphics.Image; import org.xmind.core.Core; import org.xmind.core.ITopic; import org.xmind.core.event.CoreEvent; import org.xmind.core.event.ICoreEventRegister; import org.xmind.core.marker.IMarker; import org.xmind.core.marker.IMarkerRef; import org.xmind.gef.GEF; import org.xmind.gef.draw2d.SizeableImageFigure; import org.xmind.gef.draw2d.graphics.GraphicsUtils; import org.xmind.gef.graphicalpolicy.IStyleSelector; import org.xmind.gef.part.IPart; import org.xmind.gef.part.IRequestHandler; import org.xmind.gef.policy.NullEditPolicy; import org.xmind.gef.service.IFeedback; import org.xmind.ui.internal.svgsupport.SVGImageData; import org.xmind.ui.internal.svgsupport.SVGImageFigure; import org.xmind.ui.internal.svgsupport.SVGReference; import org.xmind.ui.mindmap.IMarkerPart; import org.xmind.ui.mindmap.ISelectionFeedbackHelper; import org.xmind.ui.mindmap.ITopicPart; import org.xmind.ui.mindmap.MindMapUI; import org.xmind.ui.resources.ImageReference; import org.xmind.ui.style.StyleUtils; import org.xmind.ui.style.TextStyleData; import org.xmind.ui.util.MarkerImageDescriptor; public class MarkerPart extends MindMapPartBase implements IMarkerPart { private ImageReference imageRef = null; private SVGReference svgRef = null; private Dimension preferredSize = null; private LocalResourceManager resourceManager; public MarkerPart() { setDecorator(MarkerDecorator.getInstance()); } @SuppressWarnings("unchecked") @Override public Object getAdapter(Class adapter) { if (adapter.isAssignableFrom(IMarkerRef.class)) return getMarkerRef(); if (adapter.isAssignableFrom(IMarker.class)) return getMarker(); if (adapter.isAssignableFrom(ITopic.class)) return getTopic(); if (adapter == Image.class) return getImage(); if (adapter == SVGImageData.class) return getSVGData(); return super.getAdapter(adapter); } protected IFigure createFigure() { if (svgRef != null) { SVGImageFigure figure = new SVGImageFigure(); figure.setManager(resourceManager); return figure; } else return new SizeableImageFigure(); } public IMarkerRef getMarkerRef() { return (IMarkerRef) super.getRealModel(); } protected void register() { registerModel(getMarkerRef()); super.register(); } protected void unregister() { super.unregister(); unregisterModel(getMarkerRef()); } public IMarker getMarker() { IMarkerRef markerRef = getMarkerRef(); return markerRef == null ? null : markerRef.getMarker(); } public ITopic getTopic() { return getMarkerRef().getParent(); } public ITopicPart getTopicPart() { if (getParent() instanceof ITopicPart) return (ITopicPart) getParent(); return null; } public void setParent(IPart parent) { if (getParent() instanceof TopicPart) { ((TopicPart) getParent()).removeMarker(this); } super.setParent(parent); updateMarker(); if (getParent() instanceof TopicPart) { ((TopicPart) getParent()).addMarker(this); } } public Image getImage() { if (imageRef != null && !imageRef.isDisposed()) return imageRef.getImage(); return null; } public SVGImageData getSVGData() { if (svgRef != null) return svgRef.getSVGData(); return null; } @Override protected void onActivated() { this.resourceManager = new LocalResourceManager(JFaceResources.getResources()); super.onActivated(); } protected void onDeactivated() { if (imageRef != null) { imageRef.dispose(); imageRef = null; } if (svgRef != null) { svgRef = null; this.resourceManager.dispose(); } super.onDeactivated(); } @Override public void setModel(Object model) { // step 1, new marker part // step 2, set model super.setModel(model); // step 3, ensure image type IMarkerRef markerRef = (IMarkerRef) ((ViewerModel) model).getRealModel(); IMarker marker = markerRef.getMarker(); String svgPath = marker != null ? marker.getSVGPath() : null; if (svgPath != null && !"".equals(svgPath)) { //$NON-NLS-1$ this.svgRef = createSVGReference(); } else { this.imageRef = createImageReference(); } } /* * (non-Javadoc) * * @see * org.xmind.gef.part.GraphicalEditPart#containsPoint(org.eclipse.draw2d * .geometry.Point) */ @Override public boolean containsPoint(Point position) { return super.containsPoint(position); } @Override protected void updateView() { updateToolTip(); super.updateView(); } public IFigure findTooltipAt(Point position) { if (containsPoint(position)) { IFigure toolTip = getFigure().getToolTip(); if (toolTip != null) return toolTip; return new Label(getMarkerRef().getDescription()); } return null; } protected void declareEditPolicies(IRequestHandler reqHandler) { super.declareEditPolicies(reqHandler); reqHandler.installEditPolicy(GEF.ROLE_SELECTABLE, NullEditPolicy.getInstance()); reqHandler.installEditPolicy(GEF.ROLE_DELETABLE, MindMapUI.POLICY_DELETABLE); reqHandler.installEditPolicy(GEF.ROLE_MOVABLE, MindMapUI.POLICY_MARKER_MOVABLE); } protected IFeedback createFeedback() { return new SimpleSelectionFeedback(this); } protected ISelectionFeedbackHelper createSelectionFeedbackHelper() { return new SelectionFeedbackHelper(); } @Override protected void installModelListeners() { super.installModelListeners(); } protected void registerCoreEvents(Object source, ICoreEventRegister register) { super.registerCoreEvents(source, register); register.register(Core.Style); ITopic topic = getMarkerRef().getParent(); register.setNextSourceFrom(topic); register.register(Core.Style); } public void handleCoreEvent(CoreEvent event) { String type = event.getType(); if (Core.Style.equals(type)) { updateMarker(); } } private void updateMarker() { if (svgRef == null) { if (imageRef != null) { imageRef.dispose(); } imageRef = createImageReference(); } else { // svgRef don't have to create a new reference, // but the preferredSize must be calculated again preferredSize = calculateSVGPreferredSize(); } update(); } private ImageReference createImageReference() { preferredSize = calculateImagePreferredSize(); int hintSize = preferredSize == null ? -1 : preferredSize.width; return new ImageReference(MarkerImageDescriptor.createFromMarkerRef(getMarkerRef(), hintSize, hintSize), false); } private SVGReference createSVGReference() { preferredSize = calculateSVGPreferredSize(); String resourcePath = MarkerImageDescriptor.RESOURCE_URL_PREFIX + getMarker().getSVGPath(); SVGReference ref = new SVGReference(resourcePath); if (this.resourceManager == null) this.resourceManager = new LocalResourceManager(JFaceResources.getResources()); return ref; } private Dimension calculateSVGPreferredSize() { ITopicPart tp = getTopicPart(); if (tp == null) return null; IStyleSelector ss = (IStyleSelector) tp.getAdapter(IStyleSelector.class); TextStyleData data = StyleUtils.getTextStyleData(tp, ss, null); int leading = GraphicsUtils.getAdvanced().getFontMetrics(JFaceResources.getDefaultFont()).getLeading(); return new Dimension(data.height + leading, data.height + leading); } private Dimension calculateImagePreferredSize() { ITopicPart tp = getTopicPart(); if (tp == null) return null; IStyleSelector ss = (IStyleSelector) tp.getAdapter(IStyleSelector.class); TextStyleData data = StyleUtils.getTextStyleData(tp, ss, null); int fontSize = data.height; if (fontSize < 13) { return new Dimension(16, 16); } else if (fontSize >= 13 && fontSize < 25) { return new Dimension(24, 24); } else { return new Dimension(32, 32); } } public Dimension getPreferredSize() { return preferredSize; } public ResourceManager getResourceManager() { return resourceManager; } }