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.constant; import org.bonitasoft.studio.expression.editor.i18n.Messages; import org.bonitasoft.studio.expression.editor.provider.IExpressionEditor; 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.UpdateValueStrategy; import org.eclipse.core.databinding.observable.value.IObservableValue; import org.eclipse.core.databinding.validation.IValidator; import org.eclipse.core.databinding.validation.ValidationStatus; import org.eclipse.core.runtime.IStatus; import org.eclipse.emf.databinding.EMFDataBindingContext; import org.eclipse.emf.databinding.EMFObservables; import org.eclipse.emf.ecore.EObject; import org.eclipse.jface.databinding.fieldassist.ControlDecorationSupport; 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.ComboViewer; import org.eclipse.jface.viewers.IStructuredContentProvider; import org.eclipse.jface.viewers.Viewer; import org.eclipse.jface.viewers.ViewerFilter; import org.eclipse.swt.SWT; 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.Text; /** * @author Romain Bioteau * */ public class ConstantExpressionEditor extends SelectionAwareExpressionEditor implements IExpressionEditor { private Text valueText; private ComboViewer typeCombo; private Expression inputExpression; private boolean isPageFlowContext = false; @Override public Control createExpressionEditor(Composite parent) { return createExpressionEditor(parent, false); } @Override public Control createExpressionEditor(Composite parent, boolean isPassword) { Composite mainComposite = new Composite(parent, SWT.NONE); mainComposite.setLayoutData(GridDataFactory.fillDefaults().grab(true, true).create()); mainComposite.setLayout(new GridLayout(2, false)); Label valueLabel = new Label(mainComposite, SWT.NONE); valueLabel.setText(Messages.value); if (isPassword) { valueText = new Text(mainComposite, SWT.BORDER | SWT.PASSWORD); } else { valueText = new Text(mainComposite, SWT.BORDER | SWT.MULTI | SWT.WRAP | SWT.V_SCROLL); } valueText.setLayoutData(GridDataFactory.fillDefaults().grab(true, true).hint(300, 80).create()); Label typeLabel = new Label(mainComposite, SWT.NONE); typeLabel.setText(Messages.returnType); typeCombo = new ComboViewer(mainComposite, SWT.BORDER | SWT.READ_ONLY); typeCombo.getCombo().setLayoutData(GridDataFactory.fillDefaults().grab(true, false).create()); typeCombo.setContentProvider(new IStructuredContentProvider() { @Override public void inputChanged(Viewer viewer, Object oldInput, Object newInput) { } @Override public void dispose() { } @Override public Object[] getElements(Object inputElement) { return new String[] { String.class.getName(), Boolean.class.getName(), Long.class.getName(), Float.class.getName(), Double.class.getName(), Integer.class.getName() }; } }); typeCombo.setLabelProvider(new ConstantTypeLabelProvider()); typeCombo.setInput(new Object()); return mainComposite; } @Override public void bindExpression(EMFDataBindingContext dataBindingContext, EObject context, Expression inputExpression, ViewerFilter[] filters, ExpressionViewer expressionViewer) { this.inputExpression = inputExpression; IObservableValue contentModelObservable = EMFObservables.observeValue(inputExpression, ExpressionPackage.Literals.EXPRESSION__CONTENT); IObservableValue returnTypeModelObservable = EMFObservables.observeValue(inputExpression, ExpressionPackage.Literals.EXPRESSION__RETURN_TYPE); dataBindingContext.bindValue(SWTObservables.observeText(valueText, SWT.Modify), contentModelObservable); UpdateValueStrategy targetToModel = new UpdateValueStrategy(); targetToModel.setAfterConvertValidator(new IValidator() { @Override public IStatus validate(Object value) { if (value == null || value.toString().isEmpty()) { return ValidationStatus.error(Messages.returnTypeIsMandatory); } return ValidationStatus.ok(); } }); ControlDecorationSupport .create(dataBindingContext.bindValue(ViewersObservables.observeSingleSelection(typeCombo), returnTypeModelObservable, targetToModel, null), SWT.LEFT); typeCombo.getCombo().setEnabled(!inputExpression.isReturnTypeFixed()); } /* (non-Javadoc) * @see org.bonitasoft.studio.expression.editor.provider.IExpressionEditor#canFinish() */ @Override public boolean canFinish() { return typeCombo != null && !typeCombo.getCombo().isDisposed() && typeCombo.getCombo().getText() != null && !typeCombo.getCombo().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; } }