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.message; import java.util.HashSet; import java.util.Set; import org.bonitasoft.studio.common.ExpressionConstants; import org.bonitasoft.studio.common.jface.TableColumnSorter; import org.bonitasoft.studio.expression.editor.ExpressionEditorService; import org.bonitasoft.studio.expression.editor.i18n.Messages; import org.bonitasoft.studio.expression.editor.provider.IExpressionEditor; import org.bonitasoft.studio.expression.editor.provider.IExpressionProvider; import org.bonitasoft.studio.expression.editor.provider.SelectionAwareExpressionEditor; import org.bonitasoft.studio.expression.editor.viewer.ExpressionViewer; import org.bonitasoft.studio.model.expression.Expression; import org.bonitasoft.studio.model.expression.ExpressionPackage; import org.eclipse.core.databinding.observable.value.IObservableValue; import org.eclipse.emf.databinding.EMFDataBindingContext; import org.eclipse.emf.databinding.EMFObservables; import org.eclipse.emf.ecore.EObject; import org.eclipse.jface.databinding.swt.SWTObservables; import org.eclipse.jface.databinding.viewers.ViewersObservables; import org.eclipse.jface.layout.GridDataFactory; import org.eclipse.jface.viewers.ArrayContentProvider; import org.eclipse.jface.viewers.ColumnWeightData; import org.eclipse.jface.viewers.ISelectionChangedListener; import org.eclipse.jface.viewers.LabelProvider; import org.eclipse.jface.viewers.SelectionChangedEvent; import org.eclipse.jface.viewers.TableLayout; import org.eclipse.jface.viewers.TableViewer; import org.eclipse.jface.viewers.TableViewerColumn; import org.eclipse.jface.viewers.ViewerFilter; import org.eclipse.swt.SWT; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.TableColumn; import org.eclipse.swt.widgets.Text; /** * @author Romain Bioteau * */ public class MessageIdExpressionEditor extends SelectionAwareExpressionEditor implements IExpressionEditor { private Text valueText; private Expression inputExpression; private TableViewer viewer; private boolean isPageFlowContext = false; @Override public Control createExpressionEditor(Composite parent) { Composite mainComposite = new Composite(parent, SWT.NONE); mainComposite.setLayoutData(GridDataFactory.fillDefaults().grab(true, true).create()); mainComposite.setLayout(new GridLayout(2, false)); createViewer(mainComposite); Label valueLabel = new Label(mainComposite, SWT.NONE); valueLabel.setText(Messages.messageDataId); valueText = new Text(mainComposite, SWT.BORDER); valueText.setLayoutData(GridDataFactory.fillDefaults().grab(true, false).create()); return mainComposite; } private void createViewer(Composite mainComposite) { viewer = new TableViewer(mainComposite, SWT.FULL_SELECTION | SWT.BORDER | SWT.SINGLE | SWT.V_SCROLL); TableLayout layout = new TableLayout(); layout.addColumnData(new ColumnWeightData(100, false)); viewer.getTable().setLayout(layout); viewer.getTable().setLayoutData(GridDataFactory.fillDefaults().grab(true, true).span(2, 1).create()); TableViewerColumn columnViewer = new TableViewerColumn(viewer, SWT.NONE); TableColumn column = columnViewer.getColumn(); column.setText(Messages.availableIds); TableColumnSorter sorter = new TableColumnSorter(viewer); sorter.setColumn(column); viewer.getTable().setHeaderVisible(true); viewer.setContentProvider(new ArrayContentProvider()); viewer.setLabelProvider(new LabelProvider() { @Override public String getText(Object element) { return super.getText(element); } @Override public Image getImage(Object element) { return ExpressionEditorService.getInstance() .getExpressionProvider(ExpressionConstants.MESSAGE_ID_TYPE).getTypeIcon(); } }); viewer.addPostSelectionChangedListener(new ISelectionChangedListener() { @Override public void selectionChanged(SelectionChangedEvent event) { if (!event.getSelection().isEmpty()) { MessageIdExpressionEditor.this.fireSelectionChanged(); } } }); } @Override public void bindExpression(EMFDataBindingContext dataBindingContext, EObject context, Expression inputExpression, ViewerFilter[] filters, ExpressionViewer expressionViewer) { this.inputExpression = inputExpression; IObservableValue nameModelObservable = EMFObservables.observeValue(inputExpression, ExpressionPackage.Literals.EXPRESSION__NAME); IObservableValue contentModelObservable = EMFObservables.observeValue(inputExpression, ExpressionPackage.Literals.EXPRESSION__CONTENT); Set<String> input = new HashSet<String>(); IExpressionProvider provider = ExpressionEditorService.getInstance() .getExpressionProvider(ExpressionConstants.MESSAGE_ID_TYPE); for (Expression e : provider.getExpressions(context)) { input.add(e.getName()); } viewer.setInput(input); dataBindingContext.bindValue(SWTObservables.observeText(valueText, SWT.Modify), nameModelObservable); dataBindingContext.bindValue(SWTObservables.observeText(valueText, SWT.Modify), contentModelObservable); dataBindingContext.bindValue(ViewersObservables.observeSingleSelection(viewer), nameModelObservable); dataBindingContext.bindValue(ViewersObservables.observeSingleSelection(viewer), contentModelObservable); } /* (non-Javadoc) * @see org.bonitasoft.studio.expression.editor.provider.IExpressionEditor#canFinish() */ @Override public boolean canFinish() { return valueText != null && !valueText.isDisposed() && valueText.getText() != null && !valueText.getText().isEmpty(); } @Override public void okPressed() { final String expressionContent = inputExpression.getContent(); if (expressionContent != null && !expressionContent.equals(inputExpression.getName())) { inputExpression.setName(expressionContent); } } @Override public Control getTextControl() { return valueText; } @Override public boolean isPageFlowContext() { return isPageFlowContext; } @Override public void setIsPageFlowContext(boolean isPageFlowContext) { this.isPageFlowContext = isPageFlowContext; } }