Java tutorial
/******************************************************************************* * Copyright (c) 2007 Spring IDE Developers * All rights reserved. This program and the accompanying materials * are 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: * Spring IDE Developers - initial API and implementation *******************************************************************************/ package org.springframework.ide.eclipse.webflow.ui.graph.properties; import java.beans.PropertyChangeEvent; import java.beans.PropertyChangeListener; import org.eclipse.gef.editparts.AbstractConnectionEditPart; import org.eclipse.gef.ui.actions.ActionRegistry; import org.eclipse.jface.dialogs.Dialog; import org.eclipse.jface.text.Assert; import org.eclipse.jface.viewers.DecoratingLabelProvider; import org.eclipse.jface.viewers.ISelection; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.swt.SWT; import org.eclipse.swt.custom.CLabel; import org.eclipse.swt.events.ModifyEvent; import org.eclipse.swt.events.ModifyListener; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.layout.FormAttachment; import org.eclipse.swt.layout.FormData; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Text; import org.eclipse.ui.IEditorPart; import org.eclipse.ui.IWorkbenchPart; import org.eclipse.ui.PlatformUI; import org.eclipse.ui.dialogs.ElementListSelectionDialog; import org.eclipse.ui.views.properties.tabbed.AbstractPropertySection; import org.eclipse.ui.views.properties.tabbed.ITabbedPropertyConstants; import org.eclipse.ui.views.properties.tabbed.TabbedPropertySheetPage; import org.springframework.ide.eclipse.webflow.core.internal.model.WebflowModelXmlUtils; import org.springframework.ide.eclipse.webflow.core.model.ICloneableModelElement; import org.springframework.ide.eclipse.webflow.core.model.IState; import org.springframework.ide.eclipse.webflow.core.model.IStateTransition; import org.springframework.ide.eclipse.webflow.core.model.ITransitionableTo; import org.springframework.ide.eclipse.webflow.core.model.IWebflowModelElement; import org.springframework.ide.eclipse.webflow.core.model.IWebflowState; import org.springframework.ide.eclipse.webflow.ui.graph.actions.EditPropertiesAction; import org.springframework.ide.eclipse.webflow.ui.graph.commands.EditPropertiesCommand; import org.springframework.ide.eclipse.webflow.ui.graph.model.WebflowModelLabelDecorator; import org.springframework.ide.eclipse.webflow.ui.graph.model.WebflowModelLabelProvider; /** * @author Christian Dupuis * @since 2.0 */ public class StateTransitionSection extends AbstractPropertySection implements PropertyChangeListener { /** * */ private Text onText; /** * */ private Text toText; /** * */ private Button browseStateButton; /** * */ private IStateTransition stateTransition; /** * */ private IStateTransition oldStateTransition; /** * */ private ModifyListener listener = new ModifyListener() { public void modifyText(ModifyEvent arg0) { IEditorPart editor = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage() .getActiveEditor(); ActionRegistry actionRegistry = (ActionRegistry) editor.getAdapter(ActionRegistry.class); EditPropertiesAction action = (EditPropertiesAction) actionRegistry .getAction(EditPropertiesAction.EDITPROPERTIES); action.setOpenDialog(false); EditPropertiesCommand command = new EditPropertiesCommand(); IStateTransition clone = null; if (stateTransition instanceof ICloneableModelElement) { clone = (IStateTransition) ((ICloneableModelElement) stateTransition).cloneModelElement(); } clone.setOn(onText.getText()); command.setChild((ICloneableModelElement<IWebflowModelElement>) stateTransition, clone); if (action != null) { stateTransition.removePropertyChangeListener(StateTransitionSection.this); action.runWithCommand(command); stateTransition.addPropertyChangeListener(StateTransitionSection.this); } } }; /** * */ private ModifyListener toStateListener = new ModifyListener() { public void modifyText(ModifyEvent arg0) { IEditorPart editor = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage() .getActiveEditor(); ActionRegistry actionRegistry = (ActionRegistry) editor.getAdapter(ActionRegistry.class); EditPropertiesAction action = (EditPropertiesAction) actionRegistry .getAction(EditPropertiesAction.EDITPROPERTIES); action.setOpenDialog(false); EditPropertiesCommand command = new EditPropertiesCommand(); IState state = WebflowModelXmlUtils.getStateById( (IWebflowState) stateTransition.getElementParent().getElementParent(), toText.getText()); command.setNewTarget((ITransitionableTo) state); command.setChild((ICloneableModelElement<IWebflowModelElement>) stateTransition); command.setOnlyReconnect(true); if (action != null) { stateTransition.removePropertyChangeListener(StateTransitionSection.this); action.runWithCommand(command); stateTransition.addPropertyChangeListener(StateTransitionSection.this); } } }; /* (non-Javadoc) * @see org.eclipse.ui.views.properties.tabbed.AbstractPropertySection#createControls(org.eclipse.swt.widgets.Composite, org.eclipse.ui.views.properties.tabbed.TabbedPropertySheetPage) */ public void createControls(Composite parent, TabbedPropertySheetPage aTabbedPropertySheetPage) { super.createControls(parent, aTabbedPropertySheetPage); Composite composite = getWidgetFactory().createFlatFormComposite(parent); FormData data; onText = getWidgetFactory().createText(composite, ""); //$NON-NLS-1$ data = new FormData(); data.left = new FormAttachment(0, STANDARD_LABEL_WIDTH); data.right = new FormAttachment(100, 0); data.top = new FormAttachment(0, ITabbedPropertyConstants.VSPACE); onText.setLayoutData(data); onText.addModifyListener(listener); CLabel labelLabel = getWidgetFactory().createCLabel(composite, "Event id:"); //$NON-NLS-1$ data = new FormData(); data.left = new FormAttachment(0, 0); data.right = new FormAttachment(onText, -ITabbedPropertyConstants.HSPACE); data.top = new FormAttachment(onText, 0, SWT.CENTER); labelLabel.setLayoutData(data); browseStateButton = getWidgetFactory().createButton(composite, "...", SWT.PUSH); //$NON-NLS-1$ data = new FormData(); data.left = new FormAttachment(96, 0); data.right = new FormAttachment(100, 0); data.top = new FormAttachment(labelLabel, ITabbedPropertyConstants.VSPACE); browseStateButton.setLayoutData(data); browseStateButton.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent e) { handleSelectionChanged(); } }); toText = getWidgetFactory().createText(composite, ""); //$NON-NLS-1$ data = new FormData(); toText.setEditable(false); data.left = new FormAttachment(0, STANDARD_LABEL_WIDTH); data.right = new FormAttachment(95, 0); data.top = new FormAttachment(browseStateButton, 0, SWT.CENTER); toText.setLayoutData(data); toText.addModifyListener(toStateListener); CLabel comboLabel = getWidgetFactory().createCLabel(composite, "To State id:"); //$NON-NLS-1$ data = new FormData(); data.left = new FormAttachment(0, 0); data.right = new FormAttachment(toText, -ITabbedPropertyConstants.HSPACE); data.top = new FormAttachment(browseStateButton, 0, SWT.CENTER); comboLabel.setLayoutData(data); } /** * */ protected void handleSelectionChanged() { ElementListSelectionDialog dialog = new ElementListSelectionDialog(getPart().getSite().getShell(), new DecoratingLabelProvider(new WebflowModelLabelProvider(), new WebflowModelLabelDecorator())); dialog.setBlockOnOpen(true); dialog.setElements(WebflowModelXmlUtils .getStates((IWebflowModelElement) this.stateTransition.getElementParent(), false).toArray()); dialog.setEmptySelectionMessage("Enter a valid state id"); dialog.setTitle("State reference"); dialog.setMessage("Please select a state reference"); dialog.setMultipleSelection(false); if (Dialog.OK == dialog.open()) { this.toText.setText(((IState) dialog.getFirstResult()).getId()); } } /* (non-Javadoc) * @see org.eclipse.ui.views.properties.tabbed.AbstractPropertySection#setInput(org.eclipse.ui.IWorkbenchPart, org.eclipse.jface.viewers.ISelection) */ public void setInput(IWorkbenchPart part, ISelection selection) { super.setInput(part, selection); Assert.isTrue(selection instanceof IStructuredSelection); Object input = ((IStructuredSelection) selection).getFirstElement(); if (oldStateTransition != null) { oldStateTransition.removePropertyChangeListener(this); } if (input instanceof AbstractConnectionEditPart && ((AbstractConnectionEditPart) input).getModel() instanceof IStateTransition) { stateTransition = (IStateTransition) ((AbstractConnectionEditPart) input).getModel(); stateTransition.addPropertyChangeListener(this); oldStateTransition = stateTransition; } } /* (non-Javadoc) * @see org.eclipse.ui.views.properties.tabbed.AbstractPropertySection#refresh() */ public void refresh() { onText.removeModifyListener(listener); toText.removeModifyListener(toStateListener); if (stateTransition.getOn() != null) { onText.setText(stateTransition.getOn()); } if (stateTransition.getToState() != null) { toText.setText(stateTransition.getToState().getId()); } onText.addModifyListener(listener); toText.addModifyListener(toStateListener); } /* (non-Javadoc) * @see java.beans.PropertyChangeListener#propertyChange(java.beans.PropertyChangeEvent) */ public void propertyChange(PropertyChangeEvent evt) { refresh(); } /* (non-Javadoc) * @see org.eclipse.ui.views.properties.tabbed.AbstractPropertySection#dispose() */ public void dispose() { if (stateTransition != null) { stateTransition.removePropertyChangeListener(this); } super.dispose(); } }