Java tutorial
/* * Copyright (c) 2013 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: * Data Harmonisation Panel <http://www.dhpanel.eu> */ package eu.esdihumboldt.hale.ui.service.project.internal; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import java.util.Map.Entry; import java.util.TreeMap; import org.eclipse.jface.dialogs.IInputValidator; import org.eclipse.jface.dialogs.InputDialog; import org.eclipse.jface.layout.GridDataFactory; import org.eclipse.jface.layout.GridLayoutFactory; import org.eclipse.jface.preference.PreferencePage; import org.eclipse.swt.SWT; import org.eclipse.swt.events.ModifyEvent; import org.eclipse.swt.events.ModifyListener; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; 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.swt.widgets.Text; import org.eclipse.ui.IWorkbench; import org.eclipse.ui.IWorkbenchPreferencePage; import org.eclipse.ui.PlatformUI; import de.fhg.igd.slf4jplus.ALogger; import de.fhg.igd.slf4jplus.ALoggerFactory; import eu.esdihumboldt.hale.common.core.io.Value; import eu.esdihumboldt.hale.common.core.io.ValueProperties; import eu.esdihumboldt.hale.common.core.io.project.ProjectVariables; import eu.esdihumboldt.hale.ui.common.CommonSharedImages; import eu.esdihumboldt.hale.ui.common.CommonSharedImagesConstants; import eu.esdihumboldt.hale.ui.service.project.ProjectService; import eu.esdihumboldt.hale.ui.util.components.DynamicScrolledComposite; /** * Preference page for project variables. * * @author Simon Templer */ public class ProjectVariablesPreferencePage extends PreferencePage implements IWorkbenchPreferencePage { private static final ALogger log = ALoggerFactory.getLogger(ProjectVariablesPreferencePage.class); /** * The preference page ID as registered in the extension point. */ public static final String ID = "eu.esdihumboldt.hale.ui.preferences.projectvars"; private ValueProperties variables; private boolean changed = false; private Composite varList; private final Map<String, List<Control>> varControls = new HashMap<>(); private Composite page; private DynamicScrolledComposite sc; /** * Default constructor. */ public ProjectVariablesPreferencePage() { super(); noDefaultButton(); setDescription("Specify project variables that can be used in certain transformation functions. " + "Project variables may be overridden by system properties or environment variables (using a specific prefix)."); } @Override protected Control createContents(Composite parent) { ProjectService ps = PlatformUI.getWorkbench().getService(ProjectService.class); Value value = ps.getConfigurationService().getProperty(ProjectVariables.PROJECT_PROPERTY_VARIABLES); variables = value.as(ValueProperties.class); if (variables == null) { variables = new ValueProperties(); if (value.getValue() != null) { log.error("Unknown representation of project variables encountered"); } } sc = new DynamicScrolledComposite(parent, SWT.V_SCROLL); sc.setExpandHorizontal(true); sc.setLayoutData(GridDataFactory.fillDefaults().grab(true, true).hint(SWT.DEFAULT, 200).create()); page = new Composite(sc, SWT.NONE); GridLayoutFactory.swtDefaults().numColumns(1).applyTo(page); GridDataFactory.fillDefaults().grab(true, true).applyTo(page); varList = new Composite(page, SWT.NONE); GridLayoutFactory.fillDefaults().numColumns(3).equalWidth(false).applyTo(varList); GridDataFactory.fillDefaults().grab(true, false).applyTo(varList); Map<String, Value> sorted = new TreeMap<>(variables); for (String varName : sorted.keySet()) { addEditor(varName, false); } // add Add button Button add = new Button(page, SWT.PUSH); GridDataFactory.swtDefaults().align(SWT.END, SWT.BEGINNING).applyTo(add); add.setImage(CommonSharedImages.getImageRegistry().get(CommonSharedImagesConstants.IMG_ADD)); add.setToolTipText("Add variable"); add.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { final Display display = Display.getCurrent(); InputDialog dialog = new InputDialog(display.getActiveShell(), "Add new variable", "Please enter the name of the variable to add", "", new IInputValidator() { @Override public String isValid(String newText) { if (newText == null || newText.isEmpty()) { return "Variable name must not be empty"; } else if (variables.containsKey(newText)) { return "Variable already exists"; } return null; } }); if (dialog.open() == InputDialog.OK) { String varName = dialog.getValue(); if (varName != null) { variables.put(varName, Value.of("")); addEditor(varName, true); changed = true; } } } }); sc.setContent(page); return page; } private void addEditor(final String varName, boolean layout) { List<Control> controls = varControls.get(varName); if (controls == null) { controls = new ArrayList<>(); // create variable label Label label = new Label(varList, SWT.NONE); label.setText(varName); GridDataFactory.swtDefaults().align(SWT.END, SWT.CENTER).applyTo(label); controls.add(label); // create text field Text editor = new Text(varList, SWT.BORDER | SWT.SINGLE); GridDataFactory.swtDefaults().align(SWT.FILL, SWT.CENTER).grab(true, false).applyTo(editor); editor.addModifyListener(new ModifyListener() { @Override public void modifyText(ModifyEvent e) { changed = true; } }); controls.add(editor); // create remove button Button remove = new Button(varList, SWT.PUSH); remove.setImage(CommonSharedImages.getImageRegistry().get(CommonSharedImagesConstants.IMG_REMOVE)); GridDataFactory.swtDefaults().align(SWT.END, SWT.CENTER).applyTo(remove); remove.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { List<Control> controls = varControls.get(varName); for (Control c : controls) { c.dispose(); } variables.remove(varName); updateLayout(); changed = true; } }); controls.add(remove); varControls.put(varName, controls); if (layout) { updateLayout(); } } // update text field Text textField = (Text) controls.get(1); textField.setText(variables.getSafe(varName).as(String.class, "")); } private void updateLayout() { page.layout(true, true); sc.layout(); } @Override public boolean performOk() { ProjectService ps = PlatformUI.getWorkbench().getService(ProjectService.class); if (changed) { for (Entry<String, List<Control>> entry : varControls.entrySet()) { String varName = entry.getKey(); Text textField = (Text) entry.getValue().get(1); variables.put(varName, Value.of(textField.getText())); } ps.getConfigurationService().setProperty(ProjectVariables.PROJECT_PROPERTY_VARIABLES, Value.complex(variables)); changed = false; } return true; } @Override public void init(IWorkbench workbench) { // nothing to do } }