Java tutorial
/** * Copyright (C) 2012 BonitaSoft S.A. * BonitaSoft, 31 rue Gustave Eiffel - 38000 Grenoble * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 2.0 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 General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package org.bonitasoft.studio.expression.editor.viewer; import org.bonitasoft.studio.common.ExpressionConstants; import org.bonitasoft.studio.common.IBonitaVariableContext; import org.bonitasoft.studio.common.jface.FileActionDialog; import org.bonitasoft.studio.common.jface.databinding.DialogSupport; import org.bonitasoft.studio.common.repository.filestore.FileStoreChangeEvent.EventType; import org.bonitasoft.studio.expression.editor.ExpressionEditorService; import org.bonitasoft.studio.expression.editor.i18n.Messages; import org.bonitasoft.studio.expression.editor.provider.ExpressionTypeContentProvider; import org.bonitasoft.studio.expression.editor.provider.ExpressionTypeLabelProvider; import org.bonitasoft.studio.expression.editor.provider.IExpressionEditor; import org.bonitasoft.studio.expression.editor.provider.IExpressionProvider; import org.bonitasoft.studio.model.expression.Expression; import org.bonitasoft.studio.model.expression.ExpressionFactory; import org.bonitasoft.studio.model.expression.ExpressionPackage; import org.eclipse.core.databinding.UpdateValueStrategy; import org.eclipse.core.databinding.conversion.Converter; import org.eclipse.core.databinding.conversion.IConverter; import org.eclipse.core.runtime.Assert; import org.eclipse.emf.databinding.EMFDataBindingContext; import org.eclipse.emf.ecore.EObject; import org.eclipse.emf.edit.command.SetCommand; import org.eclipse.emf.edit.domain.EditingDomain; import org.eclipse.jface.dialogs.DialogTray; import org.eclipse.jface.dialogs.MessageDialog; import org.eclipse.jface.dialogs.TrayDialog; import org.eclipse.jface.layout.GridDataFactory; import org.eclipse.jface.viewers.ColumnViewerToolTipSupport; import org.eclipse.jface.viewers.ISelection; import org.eclipse.jface.viewers.ISelectionChangedListener; import org.eclipse.jface.viewers.SelectionChangedEvent; import org.eclipse.jface.viewers.StructuredSelection; import org.eclipse.jface.viewers.TableViewer; import org.eclipse.jface.viewers.Viewer; import org.eclipse.jface.viewers.ViewerFilter; import org.eclipse.jface.viewers.ViewerSorter; import org.eclipse.jface.window.ToolTip; import org.eclipse.swt.SWT; import org.eclipse.swt.custom.BusyIndicator; import org.eclipse.swt.events.ControlEvent; import org.eclipse.swt.events.ControlListener; import org.eclipse.swt.graphics.Point; 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.Event; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Listener; import org.eclipse.swt.widgets.Shell; import org.eclipse.swt.widgets.ToolBar; import org.eclipse.swt.widgets.ToolItem; /** * @author Romain Bioteau * */ public class EditExpressionDialog extends TrayDialog implements IBonitaVariableContext { protected Expression inputExpression; private TableViewer expressionTypeViewer; protected final EObject context; protected Composite contentComposite; protected EMFDataBindingContext dataBindingContext; protected final EditingDomain domain; protected IExpressionEditor currentExpressionEditor; private ISelection oldSelection; protected final ViewerFilter[] viewerTypeFilters; private boolean isPassword; private boolean isPageFlowContext; private final Listener openTrayListener = new Listener() { @Override public void handleEvent(Event event) { if (getShell() != null && currentExpressionEditor != null && currentExpressionEditor.provideDialogTray() && getTray() == null) { final DialogTray tray = currentExpressionEditor.createDialogTray(); openTray(tray); } else { closeTray(); } } }; protected Control helpControl; private ExpressionViewer expressionViewer; @Override public void openTray(DialogTray tray) throws IllegalStateException, UnsupportedOperationException { super.openTray(tray); getShell().removeListener(SWT.Move, getShell().getListeners(SWT.Move)[0]); getShell().removeListener(SWT.Resize, getShell().getListeners(SWT.Resize)[0]); } protected EditExpressionDialog(Shell parentShell, boolean isPassword, Expression inputExpression, EObject context, EditingDomain domain, ViewerFilter[] viewerTypeFilters, ExpressionViewer expressionViewer) { super(parentShell); this.inputExpression = inputExpression; if (this.inputExpression == null) { this.inputExpression = ExpressionFactory.eINSTANCE.createExpression(); } if (this.inputExpression.getType() == null) { this.inputExpression.setType(ExpressionConstants.CONSTANT_TYPE); } this.context = context; this.domain = domain; this.viewerTypeFilters = viewerTypeFilters; this.isPassword = isPassword; this.expressionViewer = expressionViewer; setHelpAvailable(true); if (isResizable()) { setShellStyle(SWT.DIALOG_TRIM | SWT.APPLICATION_MODAL | SWT.MAX | SWT.RESIZE | getDefaultOrientation()); } else { setShellStyle(SWT.DIALOG_TRIM | SWT.APPLICATION_MODAL | getDefaultOrientation()); } } @Override public void create() { super.create(); String expressionType = inputExpression.getType(); if (ExpressionConstants.CONSTANT_TYPE.equals(expressionType)) { if (!isSupportedConstantType(inputExpression.getReturnType())) { expressionType = ExpressionConstants.SCRIPT_TYPE; } } IExpressionProvider currentProvider = ExpressionEditorService.getInstance() .getExpressionProvider(expressionType); if (currentProvider != null && expressionTypeViewer != null) { expressionTypeViewer.setSelection(new StructuredSelection(currentProvider)); } getShell().layout(true, true); } private boolean isSupportedConstantType(String returnType) { return returnType.equals(String.class.getName()) || returnType.equals(Boolean.class.getName()) || returnType.equals(Double.class.getName()) || returnType.equals(Float.class.getName()) || returnType.equals(Long.class.getName()) || returnType.equals(Integer.class.getName()); } @Override protected void configureShell(Shell newShell) { super.configureShell(newShell); newShell.setText(Messages.editExpression); } @Override protected Point getInitialSize() { return new Point(600, 460); } @Override protected Control createDialogArea(Composite parent) { Composite composite = (Composite) super.createDialogArea(parent); composite.setLayout(new GridLayout(2, false)); composite.setLayoutData(GridDataFactory.fillDefaults().grab(true, true).create()); createExpressionTypePanel(composite); createExpressionContentPanel(composite); return composite; } protected void createExpressionContentPanel(Composite parentForm) { contentComposite = new Composite(parentForm, SWT.NONE); contentComposite.setLayoutData(GridDataFactory.fillDefaults().grab(true, true).create()); contentComposite.setLayout(new GridLayout(1, false)); } protected void createExpressionTypePanel(Composite parentForm) { Composite parentComposite = new Composite(parentForm, SWT.NONE); parentComposite.setLayoutData( GridDataFactory.swtDefaults().align(SWT.BEGINNING, SWT.FILL).grab(false, true).create()); parentComposite.setLayout(new GridLayout(1, false)); Label expressionTypeLabel = new Label(parentComposite, SWT.NONE); expressionTypeLabel.setText(Messages.expressionTypeLabel); expressionTypeLabel.setLayoutData(GridDataFactory.swtDefaults().grab(true, false).create()); expressionTypeViewer = new TableViewer(parentComposite, SWT.FULL_SELECTION | SWT.BORDER | SWT.SINGLE); expressionTypeViewer.getTable().setLayoutData(GridDataFactory.fillDefaults().grab(true, true).create()); expressionTypeViewer.setContentProvider(new ExpressionTypeContentProvider()); expressionTypeViewer.setLabelProvider(new ExpressionTypeLabelProvider()); expressionTypeViewer.setSorter(new ViewerSorter() { @Override public int compare(Viewer viewer, Object e1, Object e2) { IExpressionProvider p1 = (IExpressionProvider) e1; IExpressionProvider p2 = (IExpressionProvider) e2; return p1.getTypeLabel().compareTo(p2.getTypeLabel()); } }); if (viewerTypeFilters != null) { expressionTypeViewer.setFilters(viewerTypeFilters); } ColumnViewerToolTipSupport.enableFor(expressionTypeViewer, ToolTip.NO_RECREATE); expressionTypeViewer.setInput(context); expressionTypeViewer.addSelectionChangedListener(new ISelectionChangedListener() { @Override public void selectionChanged(SelectionChangedEvent event) { if (!event.getSelection().equals(oldSelection)) { oldSelection = event.getSelection(); expressionTypeChanged(event.getSelection()); Button okButton = getButton(OK); if (okButton != null && !okButton.isDisposed() && currentExpressionEditor != null) { okButton.setEnabled(currentExpressionEditor.canFinish()); } else if (currentExpressionEditor == null) { okButton.setEnabled(false); } } } }); expressionTypeViewer.addPostSelectionChangedListener(new ISelectionChangedListener() { @Override public void selectionChanged(SelectionChangedEvent event) { getShell().layout(true, true); } }); } @Override protected boolean isResizable() { return true; } protected void expressionTypeChanged(ISelection selection) { if (!selection.isEmpty()) { final IExpressionProvider provider = (IExpressionProvider) ((StructuredSelection) selection) .getFirstElement(); BusyIndicator.showWhile(Display.getDefault(), new Runnable() { @Override public void run() { showContent(provider.getExpressionType()); } }); } } @Override protected Button createButton(Composite parent, int id, String label, boolean defaultButton) { final Button button = super.createButton(parent, id, label, defaultButton); if (id == OK) { if (currentExpressionEditor != null) { button.setEnabled(currentExpressionEditor.canFinish()); } } return button; } protected void showContent(String type) { IExpressionProvider provider = ExpressionEditorService.getInstance().getExpressionProvider(type); Assert.isNotNull(provider); for (Control c : contentComposite.getChildren()) { c.dispose(); } if (currentExpressionEditor != null) { currentExpressionEditor.dispose(); } currentExpressionEditor = provider.getExpressionEditor(inputExpression, context); currentExpressionEditor.setIsPageFlowContext(isPageFlowContext); if (currentExpressionEditor != null) { currentExpressionEditor.createExpressionEditor(contentComposite, isPassword); contentComposite.layout(true, true); if (helpControl != null) { // helpControl.setVisible(currentExpressionEditor.provideDialogTray()); helpControl.setVisible(false); if (currentExpressionEditor.provideDialogTray()) { ToolItem item = ((ToolBar) helpControl).getItem(0); item.setSelection(true); openTrayListener.handleEvent(new Event()); } else if (getTray() != null) { closeTray(); } } if (dataBindingContext != null) { dataBindingContext.dispose(); } dataBindingContext = new EMFDataBindingContext(); UpdateValueStrategy selectionToExpressionType = new UpdateValueStrategy(); IConverter convert = new Converter(IExpressionProvider.class, String.class) { @Override public Object convert(Object arg0) { return ((IExpressionProvider) arg0).getExpressionType(); } }; selectionToExpressionType.setConverter(convert); if (domain != null) { domain.getCommandStack().execute(SetCommand.create(domain, inputExpression, ExpressionPackage.Literals.EXPRESSION__TYPE, type)); } else { inputExpression.setType(type); } currentExpressionEditor.bindExpression(dataBindingContext, context, inputExpression, viewerTypeFilters, expressionViewer); currentExpressionEditor.addListener(new Listener() { @Override public void handleEvent(Event event) { Button okButton = getButton(OK); if (okButton != null && !okButton.isDisposed()) { okButton.setEnabled(currentExpressionEditor.canFinish()); } } }); DialogSupport.create(this, dataBindingContext); } } @Override protected void okPressed() { if (currentExpressionEditor != null) { currentExpressionEditor.okPressed(); } super.okPressed(); } @Override public boolean close() { if (getTray() != null) { closeTray(); } if (currentExpressionEditor != null) { currentExpressionEditor.dispose(); } return super.close(); } @Override protected boolean canHandleShellCloseEvent() { if (FileActionDialog.getDisablePopup()) { return true; } if (MessageDialog.openQuestion(getShell(), Messages.handleShellCloseEventTitle, Messages.handleShellCloseEventMessage)) { return super.canHandleShellCloseEvent(); } return false; } @Override protected Control createHelpControl(Composite parent) { helpControl = super.createHelpControl(parent); ToolItem item = ((ToolBar) helpControl).getItem(0); Listener[] listeners = item.getListeners(SWT.Selection); if (listeners.length > 0) { for (Listener l : listeners) { item.removeListener(SWT.Selection, l); } } item.addListener(SWT.Selection, openTrayListener); if (currentExpressionEditor != null) { // helpControl.setVisible(currentExpressionEditor.provideDialogTray()); helpControl.setVisible(false); } return helpControl; } public Expression getExpression() { return inputExpression; } @Override public boolean isPageFlowContext() { return isPageFlowContext; } @Override public void setIsPageFlowContext(boolean isPageFlowContext) { this.isPageFlowContext = isPageFlowContext; if (currentExpressionEditor != null) { currentExpressionEditor.setIsPageFlowContext(isPageFlowContext); } } }