Java tutorial
/* Image Georeferencing * * Axios Engineering * http://www.axios.es * * (C) 2011, Axios Engineering S.L. (Axios) * Axios agrees to licence under Lesser General Public License (LGPL). * * You can redistribute it and/or modify it under the terms of the * GNU Lesser General Public License as published by the Free Software * Foundation; version 2.1 of the License. * * This library 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 * Lesser General Public License for more details. */ package es.axios.udig.georeferencing.ui; import java.io.File; import java.io.IOException; import java.util.Observable; import java.util.Observer; import net.refractions.udig.project.ui.IUDIGView; import net.refractions.udig.project.ui.tool.IToolContext; import org.eclipse.jface.action.Action; import org.eclipse.jface.action.IAction; import org.eclipse.jface.action.IMenuManager; import org.eclipse.jface.action.IToolBarManager; import org.eclipse.jface.resource.ImageDescriptor; import org.eclipse.swt.SWT; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.FileDialog; import org.eclipse.swt.widgets.Shell; import org.eclipse.ui.IActionBars; import org.eclipse.ui.PlatformUI; import org.eclipse.ui.part.ViewPart; import org.opengis.feature.simple.SimpleFeature; import es.axios.udig.georeferencing.internal.i18n.Messages; import es.axios.udig.georeferencing.internal.preferences.Preferences; import es.axios.udig.georeferencing.internal.process.MarkModelFactory; import es.axios.udig.georeferencing.internal.ui.GeoReferencingCommand; import es.axios.udig.georeferencing.internal.ui.GeoreferencingCommandEventChange; import es.axios.udig.georeferencing.internal.ui.MainComposite; import es.axios.udig.ui.commons.message.InfoMessage; import es.axios.udig.ui.commons.message.InfoMessage.Type; /** * View for Georeferencing. * * @author Mauricio Pazos (www.axios.es) * @author Aritz Davila (www.axios.es) * @since 1.0.0 */ public class GeoreferencingView extends ViewPart implements IUDIGView, Observer { public static final String id = "es.axios.udig.georeferencing.ui.GeoreferencingView"; //$NON-NLS-1$ private static final String GCP_FILE_EXT = "*.gcp"; //$NON-NLS-1$ private static final String LOAD_IMAGE_BUTTON = "images/load.png"; //$NON-NLS-1$ private static final String RUN_IMAGE_BUTTON = "images/run.gif"; //$NON-NLS-1$ private static final String SAVE_IMAGE_BUTTON = "images/save.png"; //$NON-NLS-1$ private GeoReferencingCommand cmd = null; private MainComposite mainComposite = null; private IToolContext toolContext = null; private runButtonAction runButton = null; private loadButtonAction loadButton = null; private saveButtonAction saveButton = null; private IAction runAction; private IAction loadAction; private IAction saveAction; private Thread displayThread = null; private MarkStorage marksStore = new MarkStorage(); /** * */ public GeoreferencingView() { this.displayThread = Display.getCurrent().getThread(); } /* * (non-Javadoc) * * @see * org.eclipse.ui.part.WorkbenchPart#createPartControl(org.eclipse.swt.widgets * .Composite) */ @Override public void createPartControl(Composite parent) { MarkModelFactory.resetIdSecuence(); this.cmd = new GeoReferencingCommand(); MainComposite composite = new MainComposite(this.cmd, parent, SWT.NONE | SWT.NO_FOCUS); composite.setLayout(new FillLayout()); composite.pack(); createActions(); createToolbar(composite); this.mainComposite = composite; this.cmd.addObserver(this); } @Override public void dispose() { this.mainComposite.close(); super.dispose(); } /** * Create the toolbar * * @param composite */ private void createToolbar(Composite composite) { IToolBarManager toolbar = getViewSite().getActionBars().getToolBarManager(); toolbar.add(runButton); toolbar.add(loadButton); toolbar.add(saveButton); this.runButton.setEnabled(false); this.loadButton.setEnabled(false); this.saveButton.setEnabled(false); // Create the menu on the toolbar IActionBars actionBars = getViewSite().getActionBars(); IMenuManager viewMenu = actionBars.getMenuManager(); viewMenu.add(runAction); viewMenu.add(loadAction); viewMenu.add(saveAction); } /** * Create actions, linking view to current map. */ private void createActions() { this.runButton = new runButtonAction(); this.runAction = new Action() { @Override public void run() { showEnabled(false); cmd.execute(); showEnabled(true); } }; this.runAction.setText(Messages.GeoreferencingView_runActionText); this.runAction.setToolTipText(Messages.GeoreferencingView_runActionTooltip); String imgFile = RUN_IMAGE_BUTTON; this.runAction.setImageDescriptor(ImageDescriptor.createFromFile(GeoreferencingView.class, imgFile)); this.runAction.setEnabled(false); this.loadButton = new loadButtonAction(); this.loadAction = new Action() { @Override public void run() { loadMarks(); }; }; this.loadAction.setText(Messages.GeoreferencingView_loadActionText); this.loadAction.setToolTipText(Messages.GeoreferencingView_loadActionTooltip); imgFile = LOAD_IMAGE_BUTTON; this.loadAction.setImageDescriptor(ImageDescriptor.createFromFile(GeoreferencingView.class, imgFile)); this.loadAction.setEnabled(false); this.saveButton = new saveButtonAction(); this.saveAction = new Action() { @Override public void run() { saveMarks(); }; }; this.saveAction.setText(Messages.GeoreferencingView_saveActionText); this.saveAction.setToolTipText(Messages.GeoreferencingView_saveActionTooltip); imgFile = SAVE_IMAGE_BUTTON; this.saveAction.setImageDescriptor(ImageDescriptor.createFromFile(GeoreferencingView.class, imgFile)); this.saveAction.setEnabled(false); } /** * Create the runButtonAction * */ private class runButtonAction extends Action { public runButtonAction() { setToolTipText(Messages.GeoreferencingView_runButtonText); String imgFile = RUN_IMAGE_BUTTON; setImageDescriptor(ImageDescriptor.createFromFile(GeoreferencingView.class, imgFile)); } @Override public void run() { showEnabled(false); cmd.execute(); showEnabled(true); } } private class loadButtonAction extends Action { public loadButtonAction() { setToolTipText(Messages.GeoreferencingView_loadButtonText); String imgFile = LOAD_IMAGE_BUTTON; setImageDescriptor(ImageDescriptor.createFromFile(GeoreferencingView.class, imgFile)); } @Override public void run() { loadMarks(); } } private class saveButtonAction extends Action { public saveButtonAction() { setToolTipText(Messages.GeoreferencingView_saveButtonText); String imgFile = SAVE_IMAGE_BUTTON; setImageDescriptor(ImageDescriptor.createFromFile(GeoreferencingView.class, imgFile)); } @Override public void run() { saveMarks(); } } private void saveMarks() { Shell shell = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell(); FileDialog fd = new FileDialog(shell, SWT.SAVE); fd.setFilterExtensions(new String[] { GCP_FILE_EXT }); fd.setText(Messages.GeoreferencingView_saveMarksFile); fd.setFilterPath(Preferences.getSaveLoadPath()); String marksFileName = fd.open(); if (marksFileName != null && !"".equals(marksFileName)) { //$NON-NLS-1$ try { marksStore.saveMarks(cmd.getMarks(), cmd.getCRS(), marksFileName); // store the path File file = new File(marksFileName); Preferences.setSaveLoadPath(file.getParent()); } catch (IOException e) { e.printStackTrace(); } } } private void loadMarks() { Shell shell = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell(); FileDialog fd = new FileDialog(shell, SWT.OPEN); fd.setFilterExtensions(new String[] { GCP_FILE_EXT }); fd.setText(Messages.GeoreferencingView_openMarksFile); fd.setFilterPath(Preferences.getSaveLoadPath()); String marksFile = fd.open(); if (marksFile != null && !"".equals(marksFile)) { //$NON-NLS-1$ try { if (this.marksStore.canLoadMarks(marksFile, cmd.getCRS())) { this.mainComposite.deleteAllPoints(); this.mainComposite.createMarks(this.marksStore.loadMarks(marksFile)); } else { InfoMessage message = new InfoMessage( Messages.GeoreferencingView_errorLoadingMarks + this.marksStore.getLoadedCrsName(), Type.WARNING); this.mainComposite.setMessage(message); } // store the path File file = new File(marksFile); Preferences.setSaveLoadPath(file.getParent()); } catch (IOException e) { e.printStackTrace(); } } } private void showEnabled(boolean enabled) { mainComposite.setEnabled(enabled); if (enabled) { mainComposite.setCursor(null); } else { mainComposite.setCursor(Display.getCurrent().getSystemCursor(SWT.CURSOR_WAIT)); } } /* * (non-Javadoc) * * @see org.eclipse.ui.part.WorkbenchPart#setFocus() */ @Override public void setFocus() { // null implementation } public void setContext(final IToolContext newContext) { assert this.displayThread != null; Display display = Display.findDisplay(this.displayThread); display.syncExec(new Runnable() { public void run() { toolContext = newContext; mainComposite.setContext(toolContext); } }); } public IToolContext getContext() { return this.toolContext; } /** * Enable the runButton * * @param enable */ private void enableRunButton(boolean enable) { if (this.runButton != null) { this.runButton.setEnabled(enable); } if (this.runAction != null) { this.runAction.setEnabled(enable); } } private void enableLoadButton(boolean enable) { if (this.loadButton != null) { this.loadButton.setEnabled(enable); } if (this.loadAction != null) { this.loadAction.setEnabled(enable); } } private void enableSaveButton(boolean enable) { if (this.saveButton != null) { this.saveButton.setEnabled(enable); } if (this.saveAction != null) { this.saveAction.setEnabled(enable); } } public void editFeatureChanged(SimpleFeature feature) { // nothing yet. } public void update(Observable obs, Object arg) { assert obs instanceof GeoReferencingCommand; GeoReferencingCommand cmd = (GeoReferencingCommand) obs; enableRunButton(cmd.canExectue()); enableSaveButton(cmd.canSave()); if (!(arg instanceof GeoreferencingCommandEventChange)) return; GeoreferencingCommandEventChange cmdEvent = (GeoreferencingCommandEventChange) arg; switch (cmdEvent.getEvent()) { case MARK_ADDED: enableSaveButton(true); break; case ALL_MARKS_DELETED: enableSaveButton(false); break; case IMAGE_LOADED: enableLoadButton(true); break; case MAP_CHANGE: enableRunButton(false); enableSaveButton(false); enableLoadButton(false); break; case MAP_CHANGE_TO_ORIGINAL: enableRunButton(cmd.canExectue()); enableSaveButton(cmd.canSave()); enableLoadButton(cmd.canLoad()); break; default: break; } } }