Java tutorial
package com.temenos.interaction.rimdsl.visualisation.views; /* * #%L * com.temenos.interaction.rimdsl.RimDsl - Visualisation * %% * Copyright (C) 2012 - 2013 Temenos Holdings N.V. * %% * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License as published by * the Free Software Foundation, either version 3 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 Affero General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. * #L% */ import java.io.PrintWriter; import java.io.StringWriter; import java.text.MessageFormat; import org.eclipse.emf.ecore.EObject; import org.eclipse.jface.action.Action; import org.eclipse.jface.action.IAction; import org.eclipse.jface.dialogs.IMessageProvider; import org.eclipse.swt.SWT; import org.eclipse.swt.custom.SashForm; import org.eclipse.swt.graphics.FontData; import org.eclipse.swt.graphics.Point; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Display; import org.eclipse.ui.forms.IMessage; import org.eclipse.ui.forms.ManagedForm; import org.eclipse.ui.forms.widgets.FormToolkit; import org.eclipse.ui.forms.widgets.ScrolledForm; import org.eclipse.ui.forms.widgets.Section; import org.eclipse.zest.core.viewers.GraphViewer; import org.eclipse.zest.core.widgets.Graph; import org.eclipse.zest.core.widgets.ZestStyles; import org.eclipse.zest.layouts.LayoutAlgorithm; import org.eclipse.zest.layouts.LayoutStyles; import org.eclipse.zest.layouts.algorithms.CompositeLayoutAlgorithm; import org.eclipse.zest.layouts.algorithms.DirectedGraphLayoutAlgorithm; import org.eclipse.zest.layouts.algorithms.HorizontalShift; import com.temenos.interaction.rimdsl.rim.State; import com.temenos.interaction.rimdsl.visualisation.VisualisationImageManager; import com.temenos.interaction.rimdsl.visualisation.providers.ResourceInteractionContentProvider; import com.temenos.interaction.rimdsl.visualisation.providers.ResourceInteractionLabelProvider; /** * This class encapsulates the process of creating the form view in the PDE * visualisation tool. * @author aphethean */ public class TransitionForm { // **************************************************************************** // DEFAULT VALUES // **************************************************************************** public static final boolean DEFAULT_SHOW_INCOMING_RELATIONS = true; public static final boolean DEFAULT_SHOW_OUTGOING_RELATIONS = true; // **************************************************************************** private static String Plugin_Binding_Analysis = "Relationship Analysis"; /* * Some parts of the form we may need access to */ private ScrolledForm form; private FormToolkit toolkit; private ManagedForm managedForm; private GraphViewer viewer; private SashForm sash; public Action showIncomingRelationsAction; public Action showOutgoingRelationsAction; private ResourceInteractionContentProvider contentProvider; private EObject currentInput; /** * Called whenever the currently selected object has changed. * @param input The selected object */ protected void setInput(EObject input) { if (input == null) { // Haven't found anything useful form.setText("Select a Resource"); currentInput = null; viewer.setInput(null); } else { // Has anything changed? if (currentInput != input || (currentInput != null && !currentInput.equals(input))) { if (input instanceof State) { State state = (State) input; form.setText(MessageFormat.format("Resource \"{0}\"", new Object[] { state.getName() })); currentInput = input; viewer.setInput(input); } else { setInput(input.eContainer()); } } } } // ****************************************************************************************** /** * Make the actions that can be called on this viewer. This currently * includes: - Focus on ... - Focus on Selected Node - History action */ private void makeActions() { showIncomingRelationsAction = new Action(null, IAction.AS_CHECK_BOX) { @Override public void run() { setShowIncomingRelations(isChecked()); } }; showIncomingRelationsAction.setText("Show Incoming Relations"); showIncomingRelationsAction.setDescription("Show Incoming Relations"); showIncomingRelationsAction.setToolTipText("Show Incoming Relations"); showIncomingRelationsAction.setImageDescriptor(VisualisationImageManager.DESC_INCOMING_TRANSITIONS); showIncomingRelationsAction.setChecked(DEFAULT_SHOW_INCOMING_RELATIONS); showOutgoingRelationsAction = new Action(null, IAction.AS_CHECK_BOX) { @Override public void run() { setShowOutgoingRelations(isChecked()); } }; showOutgoingRelationsAction.setText("Show Outgoing Relations"); showOutgoingRelationsAction.setDescription("Show Outgoing Relations"); showOutgoingRelationsAction.setToolTipText("Show Outgoing Relations"); showOutgoingRelationsAction.setImageDescriptor(VisualisationImageManager.DESC_OUTGOING_TRANSITIONS); showOutgoingRelationsAction.setChecked(DEFAULT_SHOW_OUTGOING_RELATIONS); } // ***************************************************************************** // ACTION HANDLING // ***************************************************************************** public void setShowIncomingRelations(boolean enable) { contentProvider.setShowIncomingRelations(enable); viewer.refresh(); } public void setShowOutgoingRelations(boolean enable) { contentProvider.setShowOutgoingRelations(enable); viewer.refresh(); } /** * Creates the form. * * @param toolKit * @return */ TransitionForm(Composite parent, FormToolkit toolkit, RIMDSLVisualisationView view) { makeActions(); this.toolkit = toolkit; form = this.toolkit.createScrolledForm(parent); managedForm = new ManagedForm(this.toolkit, this.form); form.setText(Plugin_Binding_Analysis); form.setImage(VisualisationImageManager.get(VisualisationImageManager.IMG_RIM_VISUALIZATION_VIEW_ICON)); FillLayout layout = new FillLayout(); layout.marginHeight = 10; layout.marginWidth = 4; form.getBody().setLayout(layout); this.toolkit.decorateFormHeading(this.form.getForm()); createSash(form.getBody()); this.contentProvider = new ResourceInteractionContentProvider( TransitionForm.DEFAULT_SHOW_INCOMING_RELATIONS, TransitionForm.DEFAULT_SHOW_OUTGOING_RELATIONS); viewer.setContentProvider(this.contentProvider); viewer.setLabelProvider(new ResourceInteractionLabelProvider(this.viewer)); viewer.setInput(null); viewer.setConnectionStyle(ZestStyles.CONNECTIONS_DIRECTED); viewer.setLayoutAlgorithm(new CompositeLayoutAlgorithm(LayoutStyles.NO_LAYOUT_NODE_RESIZING, new LayoutAlgorithm[] { new DirectedGraphLayoutAlgorithm(LayoutStyles.NO_LAYOUT_NODE_RESIZING), new HorizontalShift(LayoutStyles.NO_LAYOUT_NODE_RESIZING) })); FontData fontData = Display.getCurrent().getSystemFont().getFontData()[0]; fontData.height = 42; // Input can only be set after content provider was set setInput(null); } public void setFocusedNodeName(String nodeName) { form.setText(Plugin_Binding_Analysis + ": " + nodeName); form.reflow(true); } /** * Creates the header region of the form, with the search dialog, background * and title. It also sets up the error reporting * @param form */ String createFormTextContent(IMessage[] messages) { StringWriter sw = new StringWriter(); PrintWriter pw = new PrintWriter(sw); pw.println("<form>"); for (int i = 0; i < messages.length; i++) { IMessage message = messages[i]; pw.print("<li vspace=\"false\" style=\"image\" indent=\"16\" value=\""); switch (message.getMessageType()) { case IMessageProvider.ERROR: pw.print("error"); break; case IMessageProvider.WARNING: pw.print("warning"); break; case IMessageProvider.INFORMATION: pw.print("info"); break; } pw.print("\"> <a href=\""); pw.print(i + ""); pw.print("\">"); if (message.getPrefix() != null) { pw.print(message.getPrefix()); } pw.print(message.getMessage()); pw.println("</a></li>"); } pw.println("</form>"); pw.flush(); return sw.toString(); } /** * Creates the sashform to separate the graph from the controls. * * @param parent */ private void createSash(Composite parent) { sash = new SashForm(parent, SWT.NONE); this.toolkit.paintBordersFor(parent); Section section = this.toolkit.createSection(sash, Section.NO_TITLE); viewer = new MyGraphViewer(section, SWT.NONE); section.setClient(viewer.getControl()); sash.setWeights(new int[] { 1 }); } // Blocks automatic size change of the viewer private class MyGraphViewer extends GraphViewer { public MyGraphViewer(Composite parent, int style) { super(parent, style); Graph graph = new Graph(parent, style) { @Override public Point computeSize(int hint, int hint2, boolean changed) { return new Point(0, 0); } }; setControl(graph); } } /** * Gets the currentGraphViewern * * @return */ public GraphViewer getGraphViewer() { return viewer; } /** * Gets the form we created. */ public ScrolledForm getForm() { return form; } public ManagedForm getManagedForm() { return managedForm; } }