Java tutorial
/** * Copyright (C) 2012 BonitaSoft S.A. * BonitaSoft, 32 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.widgets.MagicComposite; import org.bonitasoft.studio.expression.editor.i18n.Messages; 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.observable.value.IObservableValue; import org.eclipse.core.runtime.IStatus; import org.eclipse.emf.databinding.EMFDataBindingContext; import org.eclipse.emf.databinding.EMFObservables; import org.eclipse.emf.databinding.EMFProperties; import org.eclipse.emf.databinding.edit.EMFEditObservables; import org.eclipse.emf.databinding.edit.EMFEditProperties; import org.eclipse.emf.ecore.EReference; import org.eclipse.jface.databinding.swt.SWTObservables; import org.eclipse.jface.databinding.viewers.ViewerProperties; import org.eclipse.jface.dialogs.MessageDialog; import org.eclipse.jface.layout.GridDataFactory; import org.eclipse.jface.layout.GridLayoutFactory; import org.eclipse.jface.viewers.ISelection; import org.eclipse.jface.viewers.IStructuredSelection; 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.GridLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Link; import org.eclipse.ui.views.properties.tabbed.TabbedPropertySheetWidgetFactory; /** * @author Romain Bioteau * */ public class CheckBoxExpressionViewer extends ExpressionViewer implements ExpressionConstants { private MagicComposite mc; private Button checkBoxControl; public CheckBoxExpressionViewer(Composite composite, int style, EReference expressionReference) { super(composite, style, expressionReference); } @Override protected void createControl(Composite composite, int style, TabbedPropertySheetWidgetFactory widgetFactory) { mc = new MagicComposite(composite, SWT.INHERIT_DEFAULT); mc.setLayout(GridLayoutFactory.fillDefaults().numColumns(2).margins(0, 0).create()); if (widgetFactory != null) { checkBoxControl = widgetFactory.createButton(mc, "", SWT.CHECK); } else { checkBoxControl = new Button(mc, SWT.CHECK); } checkBoxControl .setLayoutData(GridDataFactory.fillDefaults().grab(false, true).hint(SWT.DEFAULT, 30).create()); if (widgetFactory != null) { control = widgetFactory.createComposite(mc, SWT.INHERIT_DEFAULT); } else { control = new Composite(mc, SWT.INHERIT_DEFAULT); } control.addDisposeListener(disposeListener); control.setLayoutData(GridDataFactory.fillDefaults().grab(true, true).create()); control.setLayout(GridLayoutFactory.fillDefaults().numColumns(2).margins(0, 0).spacing(0, 0).create()); createTextControl(style, widgetFactory); createToolbar(style, widgetFactory); if ((style & SWT.BORDER) != 0) {//Not in a table createSwitchEditorControl(widgetFactory); } mc.show(checkBoxControl); mc.hide(control); } private void createSwitchEditorControl(TabbedPropertySheetWidgetFactory widgetFactory) { ((GridLayout) control.getLayout()).numColumns++; final Link switchControl = new Link(mc, SWT.NONE); switchControl.setText(Messages.switchEditor); switchControl.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { switchEditorType(); } }); } protected void switchEditorType() { if (!control.isVisible()) { mc.hide(checkBoxControl); mc.show(control); bindExpression(); } else { if (MessageDialog.openQuestion(mc.getShell(), Messages.eraseExpressionTitle, Messages.eraseExpressionMsg)) { mc.hide(control); mc.show(checkBoxControl); //Reset checkbox to false final Expression falseExp = ExpressionFactory.eINSTANCE.createExpression(); falseExp.setName(Boolean.FALSE.toString()); falseExp.setContent(Boolean.FALSE.toString()); falseExp.setReturnType(Boolean.class.getName()); falseExp.setType(ExpressionConstants.CONSTANT_TYPE); updateSelection(falseExp); bindExpression(); } } mc.layout(true, true); } @Override public Control getControl() { return mc; } @Override protected void bindExpression() { if (control.isVisible()) { super.bindExpression(); } else { if (expressionBinding != null && externalDataBindingContext != null) { externalDataBindingContext.removeBinding(expressionBinding); expressionBinding.dispose(); } if (internalDataBindingContext != null) { internalDataBindingContext.dispose(); } internalDataBindingContext = new EMFDataBindingContext(); IObservableValue nameObservable = null; if (editingDomain != null) { nameObservable = EMFEditObservables.observeValue(editingDomain, selectedExpression, ExpressionPackage.Literals.EXPRESSION__NAME); } else { nameObservable = EMFObservables.observeValue(selectedExpression, ExpressionPackage.Literals.EXPRESSION__NAME); } UpdateValueStrategy targetToModelNameStrategy = new UpdateValueStrategy(); targetToModelNameStrategy.setConverter(new Converter(Boolean.class, String.class) { @Override public Object convert(Object fromObject) { String input = ((Boolean) fromObject).toString(); updateContentType(ExpressionConstants.CONSTANT_TYPE); updateContent(getContentFromInput(input)); refresh(); return input; } }); UpdateValueStrategy modelToTargetNameStrategy = new UpdateValueStrategy(); modelToTargetNameStrategy.setConverter(new Converter(String.class, Boolean.class) { @Override public Object convert(Object fromObject) { if (fromObject != null) { String input = fromObject.toString(); if (input.equalsIgnoreCase(Boolean.TRUE.toString())) { return true; } } return false; } }); internalDataBindingContext.bindValue(SWTObservables.observeSelection(checkBoxControl), nameObservable, targetToModelNameStrategy, modelToTargetNameStrategy); } } @Override protected void internalRefresh(Object element) { super.internalRefresh(element); final String description = getMessage(IStatus.INFO); if (description != null) { checkBoxControl.setToolTipText(description); } } @Override public void setSelection(ISelection selection) { final Expression exp = (Expression) ((IStructuredSelection) getSelection()).getFirstElement(); if (ExpressionConstants.CONSTANT_TYPE.equals(exp.getType())) { if (!checkBoxControl.isVisible()) { mc.hide(control); mc.show(checkBoxControl); mc.layout(true, true); } } else { if (!control.isVisible()) { mc.hide(checkBoxControl); mc.show(control); mc.layout(true, true); } } super.setSelection(selection); } }