Java tutorial
/* * Copyright (c) 2012 Data Harmonisation Panel * * All rights reserved. This program and the accompanying materials are made * available under the terms of the GNU Lesser General Public License as * published by the Free Software Foundation, either version 3 of the License, * or (at your option) any later version. * * You should have received a copy of the GNU Lesser General Public License * along with this distribution. If not, see <http://www.gnu.org/licenses/>. * * Contributors: * HUMBOLDT EU Integrated Project #030962 * Data Harmonisation Panel <http://www.dhpanel.eu> */ package eu.esdihumboldt.hale.ui.common.crs; import java.text.MessageFormat; import java.util.HashMap; import java.util.List; import java.util.Map; import java.util.Map.Entry; import org.eclipse.jface.dialogs.IInputValidator; import org.eclipse.jface.dialogs.InputDialog; import org.eclipse.jface.dialogs.MessageDialog; import org.eclipse.jface.preference.PreferencePage; import org.eclipse.jface.resource.JFaceResources; import org.eclipse.jface.text.Document; import org.eclipse.jface.text.IDocument; import org.eclipse.jface.text.source.CompositeRuler; import org.eclipse.jface.text.source.LineNumberRulerColumn; import org.eclipse.jface.text.source.SourceViewer; import org.eclipse.jface.text.source.SourceViewerConfiguration; import org.eclipse.jface.viewers.ArrayContentProvider; import org.eclipse.jface.viewers.ComboViewer; import org.eclipse.jface.viewers.ISelection; import org.eclipse.jface.viewers.ISelectionChangedListener; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.viewers.LabelProvider; import org.eclipse.jface.viewers.SelectionChangedEvent; import org.eclipse.jface.viewers.StructuredSelection; import org.eclipse.swt.SWT; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Label; import org.eclipse.ui.IWorkbench; import org.eclipse.ui.IWorkbenchPreferencePage; import org.eclipse.ui.PlatformUI; import eu.esdihumboldt.hale.ui.common.internal.Messages; /** * CRS preference page * * @author Simon Templer * @partner 01 / Fraunhofer Institute for Computer Graphics Research */ public class CRSPreferencePage extends PreferencePage implements IWorkbenchPreferencePage { private ComboViewer listViewer; private List<String> codes; private SourceViewer wktEditor; private String lastSelected = null; private final Map<String, String> tmpWKTs = new HashMap<String, String>(); private boolean changed = false; /** * @see PreferencePage#createContents(Composite) */ @Override protected Control createContents(Composite parent) { Composite page = new Composite(parent, SWT.NONE); page.setLayout(new GridLayout(1, false)); page.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true)); Label label = new Label(page, SWT.NONE); label.setText(Messages.CRSPreferencePage_0); //$NON-NLS-1$ label.setLayoutData(new GridData(SWT.BEGINNING, SWT.BEGINNING, false, false)); // code list listViewer = new ComboViewer(page); listViewer.setContentProvider(ArrayContentProvider.getInstance()); listViewer.setLabelProvider(new LabelProvider()); listViewer.getControl().setLayoutData(new GridData(SWT.FILL, SWT.BEGINNING, true, false)); codes = WKTPreferencesCRSFactory.getInstance().getCodes(); listViewer.setInput(codes); listViewer.addSelectionChangedListener(new ISelectionChangedListener() { @Override public void selectionChanged(SelectionChangedEvent event) { ISelection selection = event.getSelection(); if (selection.isEmpty()) { updateEditor(null); } else { if (selection instanceof IStructuredSelection) { updateEditor((String) ((IStructuredSelection) selection).getFirstElement()); } } } }); // fill wkt map for (String code : codes) { tmpWKTs.put(code, WKTPreferencesCRSFactory.getInstance().getWKT(code)); } // WKT editor final Display display = Display.getCurrent(); CompositeRuler ruler = new CompositeRuler(3); LineNumberRulerColumn lineNumbers = new LineNumberRulerColumn(); lineNumbers.setBackground(display.getSystemColor(SWT.COLOR_GRAY)); // SWT.COLOR_INFO_BACKGROUND)); lineNumbers.setForeground(display.getSystemColor(SWT.COLOR_BLACK)); // SWT.COLOR_INFO_FOREGROUND)); lineNumbers.setFont(JFaceResources.getTextFont()); ruler.addDecorator(0, lineNumbers); wktEditor = new SourceViewer(page, ruler, SWT.BORDER | SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL); wktEditor.getControl().setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true)); wktEditor.getTextWidget().setFont(JFaceResources.getTextFont()); SourceViewerConfiguration conf = new SourceViewerConfiguration(); wktEditor.configure(conf); // create initial document IDocument doc = new Document(); doc.set(""); //$NON-NLS-1$ wktEditor.setInput(doc); // button bar Composite bar = new Composite(page, SWT.NONE); bar.setLayout(new GridLayout(2, true)); bar.setLayoutData(new GridData(SWT.FILL, SWT.END, true, false)); // add button (using a directory dialog) Button add = new Button(bar, SWT.PUSH); add.setLayoutData(new GridData(SWT.FILL, SWT.FILL, false, false)); add.setText(Messages.CRSPreferencePage_2); //$NON-NLS-1$ add.setToolTipText(Messages.CRSPreferencePage_3); //$NON-NLS-1$ add.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { final Display display = Display.getCurrent(); InputDialog dialog = new InputDialog(display.getActiveShell(), Messages.CRSPreferencePage_4, Messages.CRSPreferencePage_5, //$NON-NLS-1$ //$NON-NLS-2$ WKTPreferencesCRSFactory.AUTHORITY_PREFIX, new IInputValidator() { @Override public String isValid(String newText) { if (!newText.startsWith(WKTPreferencesCRSFactory.AUTHORITY_PREFIX)) { return MessageFormat.format(Messages.CRSPreferencePage_6, WKTPreferencesCRSFactory.AUTHORITY_PREFIX); //$NON-NLS-1$ } return null; } }); if (dialog.open() == InputDialog.OK) { String value = dialog.getValue(); codes.add(value); listViewer.refresh(false); listViewer.setSelection(new StructuredSelection(value)); } } }); // remove button Button remove = new Button(bar, SWT.PUSH); remove.setLayoutData(new GridData(SWT.FILL, SWT.FILL, false, false)); remove.setText(Messages.CRSPreferencePage_7); //$NON-NLS-1$ remove.setToolTipText(Messages.CRSPreferencePage_8); //$NON-NLS-1$ remove.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { ISelection selection = listViewer.getSelection(); if (!selection.isEmpty() && selection instanceof IStructuredSelection) { String selected = (String) ((IStructuredSelection) selection).getFirstElement(); codes.remove(selected); listViewer.refresh(false); if (!codes.isEmpty()) { listViewer.setSelection(new StructuredSelection(codes.get(0))); } tmpWKTs.remove(selected); changed = true; // mark as changed } } }); // update selection if (codes.isEmpty()) { listViewer.setSelection(new StructuredSelection()); } else { listViewer.setSelection(new StructuredSelection(codes.get(0))); } return page; } /** * Update the editor * * @param selected the selected feature type */ protected void updateEditor(String selected) { saveCurrent(); IDocument doc = wktEditor.getDocument(); lastSelected = selected; if (selected != null) { // load WKT for current selection String wkt = getWKT(selected); doc.set(wkt); wktEditor.getControl().setEnabled(true); wktEditor.setEditable(true); } else { wktEditor.getControl().setEnabled(false); wktEditor.setEditable(false); doc.set(""); //$NON-NLS-1$ } } /** * Get the WKT for the given code * * @param code the CRS code * * @return the WKT */ private String getWKT(String code) { String wkt = tmpWKTs.get(code); // if (wkt == null) { // wkt = WKTPreferencesCRSFactory.getInstance().getWKT(code); // } if (wkt == null) { wkt = ""; //$NON-NLS-1$ } return wkt; } /** * Save the filter that is currently edited */ protected void saveCurrent() { IDocument doc = wktEditor.getDocument(); if (lastSelected != null) { // save WKT for last selection setWKT(lastSelected, doc.get()); } } /** * Set the WKT for the given code * * @param code the CRS code * @param wkt the WKT */ protected void setWKT(String code, String wkt) { String old = tmpWKTs.get(code); tmpWKTs.put(code, wkt); if (old == null || !old.equals(wkt)) { changed = true; // mark as changed } } /** * @see PreferencePage#performOk() */ @Override public boolean performOk() { saveCurrent(); if (changed) { // only apply changes if there is a possibility of a change List<String> orgCodes = WKTPreferencesCRSFactory.getInstance().getCodes(); // remove all old ones for (String code : orgCodes) { WKTPreferencesCRSFactory.getInstance().removeWKT(code); } // add new ones for (Entry<String, String> entry : tmpWKTs.entrySet()) { String code = entry.getKey(); String wkt = entry.getValue(); if (wkt != null) { wkt = wkt.trim(); if (!wkt.isEmpty()) { WKTPreferencesCRSFactory.getInstance().addWKT(code, wkt); } } } if (MessageDialog.openQuestion(Display.getCurrent().getActiveShell(), Messages.CRSPreferencePage_11, Messages.CRSPreferencePage_12)) { //$NON-NLS-1$ //$NON-NLS-2$ Display.getCurrent().asyncExec(new Runnable() { @Override public void run() { IWorkbench wb = PlatformUI.getWorkbench(); if (wb != null && !wb.isClosing()) { wb.restart(); } } }); } } return true; } /** * @see IWorkbenchPreferencePage#init(IWorkbench) */ @Override public void init(IWorkbench workbench) { // ignore } }