Java tutorial
/******************************************************************************* * Copyright (c) 2011 Red Hat, Inc. * All rights reserved. * This program is made available under the terms of the * Eclipse Public License v1.0 which accompanies this distribution, * and is available at http://www.eclipse.org/legal/epl-v10.html * * Contributors: * Red Hat, Inc. - initial API and implementation ******************************************************************************/ package org.eclipse.bpmn2.modeler.ui.property; import java.util.ArrayList; import org.eclipse.bpmn2.di.provider.BpmnDiItemProviderAdapterFactory; import org.eclipse.bpmn2.modeler.ui.Activator; import org.eclipse.bpmn2.modeler.ui.editor.BPMN2Editor; import org.eclipse.bpmn2.provider.Bpmn2ItemProviderAdapterFactory; import org.eclipse.core.databinding.Binding; import org.eclipse.core.databinding.DataBindingContext; import org.eclipse.core.databinding.observable.value.IObservableValue; import org.eclipse.core.databinding.observable.value.IValueChangeListener; import org.eclipse.core.databinding.observable.value.ValueChangeEvent; import org.eclipse.core.resources.IProject; import org.eclipse.core.resources.ResourcesPlugin; import org.eclipse.dd.dc.provider.DcItemProviderAdapterFactory; import org.eclipse.dd.di.provider.DiItemProviderAdapterFactory; import org.eclipse.emf.ecore.EObject; import org.eclipse.emf.ecore.EStructuralFeature; import org.eclipse.emf.edit.provider.ComposedAdapterFactory; import org.eclipse.emf.edit.provider.ReflectiveItemProviderAdapterFactory; import org.eclipse.emf.edit.provider.resource.ResourceItemProviderAdapterFactory; import org.eclipse.emf.transaction.RecordingCommand; import org.eclipse.emf.transaction.TransactionalEditingDomain; import org.eclipse.jface.databinding.swt.SWTObservables; import org.eclipse.swt.SWT; import org.eclipse.swt.events.DisposeEvent; import org.eclipse.swt.events.DisposeListener; import org.eclipse.swt.events.FocusEvent; import org.eclipse.swt.events.FocusListener; import org.eclipse.swt.events.VerifyEvent; import org.eclipse.swt.events.VerifyListener; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Text; import org.eclipse.swt.widgets.Widget; import org.eclipse.ui.forms.widgets.FormToolkit; public abstract class AbstractBpmn2PropertiesComposite extends Composite { public final static ComposedAdapterFactory ADAPTER_FACTORY; protected EObject be; protected BPMN2Editor bpmn2Editor; protected final DataBindingContext bindingContext; protected final ArrayList<Widget> widgets = new ArrayList<Widget>(); protected final ArrayList<Binding> bindings = new ArrayList<Binding>(); protected final Composite parent; protected final FormToolkit toolkit = new FormToolkit(Display.getCurrent()); protected IProject project; private Text text_1; static { ADAPTER_FACTORY = new ComposedAdapterFactory(ComposedAdapterFactory.Descriptor.Registry.INSTANCE); ADAPTER_FACTORY.addAdapterFactory(new ResourceItemProviderAdapterFactory()); ADAPTER_FACTORY.addAdapterFactory(new Bpmn2ItemProviderAdapterFactory()); ADAPTER_FACTORY.addAdapterFactory(new BpmnDiItemProviderAdapterFactory()); ADAPTER_FACTORY.addAdapterFactory(new DiItemProviderAdapterFactory()); ADAPTER_FACTORY.addAdapterFactory(new DcItemProviderAdapterFactory()); ADAPTER_FACTORY.addAdapterFactory(new ReflectiveItemProviderAdapterFactory()); } /** * NB! Must call setEObject for updating contents and rebuild the UI. * * @param parent * @param style */ public AbstractBpmn2PropertiesComposite(Composite parent, int style) { super(parent, style); this.parent = parent; bindingContext = new DataBindingContext(); addDisposeListener(new DisposeListener() { @Override public void widgetDisposed(DisposeEvent e) { toolkit.dispose(); } }); toolkit.adapt(this); toolkit.paintBordersFor(this); setLayout(new GridLayout(3, false)); } public final void setEObject(BPMN2Editor bpmn2Editor, final EObject be) { String projectName = bpmn2Editor.getDiagramTypeProvider().getDiagram().eResource().getURI().segment(1); project = ResourcesPlugin.getWorkspace().getRoot().getProject(projectName); setDiagramEditor(bpmn2Editor); setEObject(be); } private final void setDiagramEditor(BPMN2Editor bpmn2Editor) { this.bpmn2Editor = bpmn2Editor; } private final void setEObject(final EObject be) { this.be = be; cleanBindings(); if (be != null) { createBindings(); } layout(true, true); } /** * This method is called when setEObject is called and this should recreate all bindings and widgets for the * component. */ public abstract void createBindings(); protected Text createTextInput(String name, boolean multiLine) { createLabel(name); int flag = SWT.BORDER; if (multiLine) { flag |= SWT.BORDER | SWT.WRAP | SWT.MULTI; } Text text = new Text(this, flag); GridData data = new GridData(SWT.FILL, SWT.CENTER, true, false, 2, 1); if (multiLine) { data.heightHint = 50; } text.setLayoutData(data); toolkit.adapt(text, true, true); widgets.add(text); return text; } protected Text createIntInput(String name) { createLabel(name); Text text = new Text(this, SWT.BORDER); text.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false, 2, 1)); toolkit.adapt(text, true, true); widgets.add(text); return text; } protected Button createBooleanInput(String name) { createLabel(name); Button button = new Button(this, SWT.CHECK); button.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false, 2, 1)); toolkit.adapt(button, true, true); widgets.add(button); return button; } protected void createLabel(String name) { Label label = new Label(this, SWT.NONE); label.setLayoutData(new GridData(SWT.RIGHT, SWT.CENTER, false, false, 1, 1)); toolkit.adapt(label, true, true); label.setText(name); widgets.add(label); } protected void bind(final EStructuralFeature a, final Text text) { Object eGet = be.eGet(a); if (eGet != null) { text.setText(eGet.toString()); } IObservableValue textObserver = SWTObservables.observeText(text, SWT.Modify); textObserver.addValueChangeListener(new IValueChangeListener() { @SuppressWarnings("restriction") @Override public void handleValueChange(final ValueChangeEvent e) { if (!text.getText().equals(be.eGet(a))) { TransactionalEditingDomain editingDomain = bpmn2Editor.getEditingDomain(); editingDomain.getCommandStack().execute(new RecordingCommand(editingDomain) { @Override protected void doExecute() { be.eSet(a, e.diff.getNewValue()); } }); if (bpmn2Editor.getDiagnostics() != null) { // revert the change and display error status message. text.setText((String) be.eGet(a)); bpmn2Editor.showErrorMessage(bpmn2Editor.getDiagnostics().getMessage()); } else bpmn2Editor.showErrorMessage(null); } } }); text.addFocusListener(new FocusListener() { @Override public void focusGained(FocusEvent e) { } @Override public void focusLost(FocusEvent e) { bpmn2Editor.showErrorMessage(null); } }); } protected void bindBoolean(final EStructuralFeature a, final Button button) { bindBoolean(a, button, be); } protected void bindBoolean(final EStructuralFeature a, final Button button, final EObject object) { button.setSelection((Boolean) object.eGet(a)); IObservableValue buttonObserver = SWTObservables.observeSelection(button); buttonObserver.addValueChangeListener(new IValueChangeListener() { @SuppressWarnings("restriction") @Override public void handleValueChange(ValueChangeEvent event) { if (!object.eGet(a).equals(button.getSelection())) { TransactionalEditingDomain editingDomain = bpmn2Editor.getEditingDomain(); editingDomain.getCommandStack().execute(new RecordingCommand(editingDomain) { @Override protected void doExecute() { object.eSet(a, button.getSelection()); } }); if (bpmn2Editor.getDiagnostics() != null) { // revert the change and display error status message. button.setSelection((Boolean) be.eGet(a)); bpmn2Editor.showErrorMessage(bpmn2Editor.getDiagnostics().getMessage()); } else bpmn2Editor.showErrorMessage(null); } } }); button.addFocusListener(new FocusListener() { @Override public void focusGained(FocusEvent e) { } @Override public void focusLost(FocusEvent e) { bpmn2Editor.showErrorMessage(null); } }); } protected void bindInt(final EStructuralFeature a, final Text text) { text.addVerifyListener(new VerifyListener() { /** * taken from * http://dev.eclipse.org/viewcvs/viewvc.cgi/org.eclipse.swt.snippets/src/org/eclipse/swt/snippets * /Snippet19.java?view=co */ @Override public void verifyText(VerifyEvent e) { String string = e.text; char[] chars = new char[string.length()]; string.getChars(0, chars.length, chars, 0); for (int i = 0; i < chars.length; i++) { if (!('0' <= chars[i] && chars[i] <= '9')) { e.doit = false; return; } } } }); Object eGet = be.eGet(a); if (eGet != null) { text.setText(eGet.toString()); } IObservableValue textObserveTextObserveWidget = SWTObservables.observeText(text, SWT.Modify); textObserveTextObserveWidget.addValueChangeListener(new IValueChangeListener() { @Override public void handleValueChange(ValueChangeEvent event) { try { final int i = Integer.parseInt(text.getText()); if (!be.eGet(a).equals(i)) { setFeatureValue(i); } } catch (NumberFormatException e) { text.setText((String) be.eGet(a)); Activator.logError(e); } } @SuppressWarnings("restriction") private void setFeatureValue(final int i) { RecordingCommand command = new RecordingCommand(bpmn2Editor.getEditingDomain()) { @Override protected void doExecute() { be.eSet(a, i); } }; bpmn2Editor.getEditingDomain().getCommandStack().execute(command); if (bpmn2Editor.getDiagnostics() != null) { // revert the change and display error status message. text.setText((String) be.eGet(a)); bpmn2Editor.showErrorMessage(bpmn2Editor.getDiagnostics().getMessage()); } else bpmn2Editor.showErrorMessage(null); } }); text.addFocusListener(new FocusListener() { @Override public void focusGained(FocusEvent e) { } @Override public void focusLost(FocusEvent e) { bpmn2Editor.showErrorMessage(null); } }); } protected void cleanBindings() { for (Binding b : bindings) { b.dispose(); } bindings.clear(); for (Widget w : widgets) { w.dispose(); } widgets.clear(); } }