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/*****************************************************************************
* Copyright (c) 2010 CEA LIST.
*
* 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:
* Remi Schnekenburger (CEA LIST) remi.schnekenburger@cea.fr - Initial API and implementation
*****************************************************************************/
package org.eclipse.papyrus.views.properties.tabbed.customization.dialog;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.util.List;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.papyrus.views.properties.runtime.state.AbstractState;
import org.eclipse.papyrus.views.properties.runtime.state.ITraversableModelElement;
import org.eclipse.papyrus.views.properties.tabbed.core.view.SectionSetDescriptorState;
import org.eclipse.papyrus.views.properties.tabbed.customization.Activator;
import org.eclipse.swt.graphics.Image;
/**
* Content provider for the configuration area of the content wizard page
*/
public class ConfigurationContentProvider implements ITreeContentProvider, PropertyChangeListener {
/** current selected sectionsetdescriptorState */
private SectionSetDescriptorState sectionSetDescriptorState;
/** current viewer */
private TreeViewer fViewer;
/**
* Creates a new ConfigurationContentProvider.
*/
public ConfigurationContentProvider() {
}
/**
* {@inheritDoc}
*/
public Object[] getElements(Object inputElement) {
if(inputElement instanceof SectionSetDescriptorState) {
return new Object[]{ new ConstraintHolder(sectionSetDescriptorState), new ContentHolder(sectionSetDescriptorState) };
}
return new Object[0];
}
/**
* {@inheritDoc}
*/
public void dispose() {
// nothing here
}
/**
* {@inheritDoc}
*/
public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
fViewer = (TreeViewer)viewer;
if(newInput instanceof SectionSetDescriptorState) {
// remove old listeners
if(sectionSetDescriptorState != null) {
traverseModel(sectionSetDescriptorState, false);
}
// set the new input
sectionSetDescriptorState = (SectionSetDescriptorState)newInput;
// add new listeners
traverseModel(sectionSetDescriptorState, true);
} else {
// should remove all listeners
if(sectionSetDescriptorState != null) {
traverseModel(sectionSetDescriptorState, false);
}
sectionSetDescriptorState = null;
}
}
/**
* {@inheritDoc}
*/
public Object[] getChildren(Object parentElement) {
// assert section set descriptor set is not null
if(sectionSetDescriptorState == null) {
return new Object[0];
}
if(parentElement instanceof ConstraintHolder) {
return sectionSetDescriptorState.getConstraintDescriptorStates().toArray();
} else if(parentElement instanceof ITraversableModelElement) {
return ((ITraversableModelElement)parentElement).getChildren().toArray();
}
return new Object[0];
}
/**
* {@inheritDoc}
*/
public Object getParent(Object element) {
return null;
}
/**
* {@inheritDoc}
*/
public boolean hasChildren(Object element) {
return getChildren(element).length > 0;
}
/**
* traverse the model to add or remove listeners, given the value of the hook parameter
*/
protected void traverseModel(ITraversableModelElement objectToTraverse, boolean isHook) {
if(objectToTraverse != null) {
if(isHook) {
objectToTraverse.removePropertyChangeListener(this);
objectToTraverse.addPropertyChangeListener(this);
} else {
objectToTraverse.removePropertyChangeListener(this);
}
}
if(objectToTraverse.getChildren() != null && !objectToTraverse.getChildren().isEmpty()) {
for(ITraversableModelElement child : objectToTraverse.getChildren()) {
traverseModel(child, isHook);
}
}
}
/**
* Object containing the constraints of the section set descriptor
*/
protected class ConstraintHolder extends LabelProvider implements ITraversableModelElement {
/** current section set state descriptor edited */
private final SectionSetDescriptorState sectionSetDescriptorState;
/**
* Creates a new ConstraintHolder.
*
* @param sectionSetDescriptorState
*/
public ConstraintHolder(SectionSetDescriptorState sectionSetDescriptorState) {
this.sectionSetDescriptorState = sectionSetDescriptorState;
}
/**
* {@inheritDoc}
*/
@Override
public Image getImage(Object element) {
return Activator.getImage("/icons/Constraints.gif");
}
/**
* {@inheritDoc}
*/
@Override
public String getText(Object element) {
return "Constraints";
}
/**
* {@inheritDoc}
*/
public List<? extends ITraversableModelElement> getChildren() {
return sectionSetDescriptorState.getConstraintDescriptorStates();
}
/**
* {@inheritDoc}
*/
public void addPropertyChangeListener(PropertyChangeListener listener) {
sectionSetDescriptorState.addPropertyChangeListener(listener);
}
/**
* {@inheritDoc}
*/
public void removePropertyChangeListener(PropertyChangeListener listener) {
sectionSetDescriptorState.removePropertyChangeListener(listener);
}
}
/**
* {@inheritDoc}
*/
public void propertyChange(PropertyChangeEvent evt) {
if(AbstractState.PROPERTY_ADD_CHILD.equals(evt.getPropertyName())) {
((TreeViewer)fViewer).refresh(evt.getSource(), true);
traverseModel((ITraversableModelElement)evt.getSource(), true);
// try to keep a valid expand level
((TreeViewer)fViewer).expandToLevel(evt.getSource(), 2);
} else if(AbstractState.PROPERTY_REMOVE_CHILD.equals(evt.getPropertyName())) {
((TreeViewer)fViewer).refresh(evt.getSource(), true);
traverseModel((ITraversableModelElement)evt.getSource(), true);
((TreeViewer)fViewer).expandAll();
} else {
((TreeViewer)fViewer).refresh(evt.getSource(), true);
}
}
}
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