StateIdSection.java

/*******************************************************************************
 * 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.ui.actions.ActionRegistry;
import org.eclipse.jface.text.Assert;
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.layout.FormAttachment;
import org.eclipse.swt.layout.FormData;
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.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.model.ICloneableModelElement;
import org.springframework.ide.eclipse.webflow.core.model.IState;
import org.springframework.ide.eclipse.webflow.core.model.IWebflowModelElement;
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.parts.AbstractStatePart;

/**
 * @author Christian Dupuis
 * @since 2.0
 */
public class StateIdSection extends AbstractPropertySection implements PropertyChangeListener {

	/**
	 * 
	 */
	private Text labelText;

	/**
	 * 
	 */
	private IState state;
	
	/**
	 * 
	 */
	private IState oldState;

	/**
	 * 
	 */
	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();

			IState clone = null;

			if (state instanceof ICloneableModelElement) {
				clone = (IState) ((ICloneableModelElement) state)
						.cloneModelElement();
			}
			clone.setId(labelText.getText());

			command.setChild((ICloneableModelElement<IWebflowModelElement>) state,
							clone);

			if (action != null) {
				state.removePropertyChangeListener(StateIdSection.this);
				action.runWithCommand(command);
				state.addPropertyChangeListener(StateIdSection.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;

		labelText = 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);
		labelText.setLayoutData(data);
		labelText.addModifyListener(listener);

		CLabel labelLabel = getWidgetFactory().createCLabel(composite,
				"State id:"); //$NON-NLS-1$
		data = new FormData();
		data.left = new FormAttachment(0, 0);
		data.right = new FormAttachment(labelText,
				-ITabbedPropertyConstants.HSPACE);
		data.top = new FormAttachment(labelText, 0, SWT.CENTER);
		labelLabel.setLayoutData(data);
	}

	/* (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 (oldState != null) {
			oldState.removePropertyChangeListener(this);
		}
		if (input instanceof AbstractStatePart
				&& ((AbstractStatePart) input).getModel() instanceof IState) {
			state = (IState) ((AbstractStatePart) input).getModel();
			state.addPropertyChangeListener(this);
			oldState = state;
		}
	}

	/* (non-Javadoc)
	 * @see org.eclipse.ui.views.properties.tabbed.AbstractPropertySection#refresh()
	 */
	public void refresh() {
		labelText.removeModifyListener(listener);
		if (state.getId() != null) {
			labelText.setText(state.getId());
		}
		labelText.addModifyListener(listener);
	}

	/* (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 (state != null) {
			state.removePropertyChangeListener(this);
		}
		super.dispose();
	}
}