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/*******************************************************************************
* Copyright (c) 2007 Oracle.
* 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:
* Oracle - initial API and implementation
*******************************************************************************/
package org.eclipse.jpt.ui.internal.views.structure;
import org.eclipse.core.runtime.ListenerList;
import org.eclipse.core.runtime.SafeRunner;
import org.eclipse.jface.action.IMenuListener;
import org.eclipse.jface.action.IMenuManager;
import org.eclipse.jface.action.MenuManager;
import org.eclipse.jface.action.Separator;
import org.eclipse.jface.util.SafeRunnable;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.ISelectionProvider;
import org.eclipse.jface.viewers.ITreeSelection;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jpt.core.JpaStructureNode;
import org.eclipse.jpt.ui.internal.jface.DelegatingTreeContentAndLabelProvider;
import org.eclipse.jpt.ui.internal.selection.DefaultJpaSelection;
import org.eclipse.jpt.ui.internal.selection.JpaSelection;
import org.eclipse.jpt.ui.structure.JpaStructureProvider;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.ui.IWorkbenchActionConstants;
import org.eclipse.ui.part.IPageSite;
import org.eclipse.ui.part.Page;
public class JpaStructurePage extends Page
implements ISelectionProvider, ISelectionChangedListener
{
private JpaStructureProvider structureProvider;
private ListenerList selectionChangedListeners;
private Composite control;
private TreeViewer viewer;
private JpaStructureView jpaStructureView;
public JpaStructurePage(JpaStructureView jpaStructureView, JpaStructureProvider structureProvider) {
this.jpaStructureView = jpaStructureView;
this.structureProvider = structureProvider;
this.selectionChangedListeners = new ListenerList();
}
@Override
public void init(IPageSite pageSite) {
super.init(pageSite);
pageSite.setSelectionProvider(this);
}
@Override
public void createControl(Composite parent) {
control = new Composite(parent, SWT.NULL);
control.setLayout(new FillLayout());
viewer = new TreeViewer(control, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL);
viewer.setAutoExpandLevel(2);
DelegatingTreeContentAndLabelProvider contentAndLabelProvider
= new DelegatingTreeContentAndLabelProvider(
structureProvider.getTreeItemContentProviderFactory(),
structureProvider.getItemLabelProviderFactory());
viewer.setContentProvider(contentAndLabelProvider);
// TODO Use problem decorator
viewer.setLabelProvider(contentAndLabelProvider);
viewer.setInput(structureProvider.getInput());
viewer.addSelectionChangedListener(this);
initContextMenu();
}
@Override
public void dispose() {
viewer.removeSelectionChangedListener(this);
structureProvider.dispose();
super.dispose();
}
//TODO this isn't really working. our jpa actions appear, but along with a bunch of other actions!!
protected void initContextMenu() {
// Create dynamic menu mgr. Dynamic is currently required to
// support action contributions.
MenuManager mgr = new MenuManager();
mgr.setRemoveAllWhenShown(true);
mgr.addMenuListener(new IMenuListener() {
public void menuAboutToShow(IMenuManager mgr) {
fillContextMenu(mgr);
}
});
Menu menu = mgr.createContextMenu(viewer.getControl());
viewer.getControl().setMenu(menu);
this.jpaStructureView.getSite().registerContextMenu(mgr, viewer);
}
/**
* Called when the context menu is about to open.
* Delegates to the action group using the viewer's selection as the action context.
* @since 2.0
*/
protected void fillContextMenu(IMenuManager manager) {
manager.add(new Separator(IWorkbenchActionConstants.MB_ADDITIONS));
}
@Override
public Control getControl() {
return control;
}
@Override
public void setFocus() {
control.setFocus();
}
void select(JpaSelection selection) {
if (selection.isEmpty()) {
viewer.setSelection(StructuredSelection.EMPTY);
}
else {
viewer.setSelection(new StructuredSelection(selection.getSelectedNode()), true);
}
}
// **************** ISelectionProvider impl ********************************
public void addSelectionChangedListener(ISelectionChangedListener listener) {
selectionChangedListeners.add(listener);
}
public void removeSelectionChangedListener(ISelectionChangedListener listener) {
selectionChangedListeners.remove(listener);
}
public ITreeSelection getSelection() {
return (ITreeSelection) viewer.getSelection();
}
public JpaSelection getJpaSelection() {
ITreeSelection viewerSelection = getSelection();
if (viewerSelection.isEmpty() || viewerSelection.size() > 1) {
return JpaSelection.NULL_SELECTION;
}
return new DefaultJpaSelection((JpaStructureNode) viewerSelection.getFirstElement());
}
public void setSelection(ISelection selection) {
if (viewer != null) {
viewer.setSelection(selection);
}
}
// **************** ISelectionChangedListener impl *************************
public void selectionChanged(SelectionChangedEvent event) {
fireSelectionChanged(event.getSelection());
}
protected void fireSelectionChanged(ISelection selection) {
// create an event
final SelectionChangedEvent event =
new SelectionChangedEvent(this, selection);
// fire the event
Object[] listeners = selectionChangedListeners.getListeners();
for (int i = 0; i < listeners.length; ++i) {
final ISelectionChangedListener l = (ISelectionChangedListener) listeners[i];
SafeRunner.run(
new SafeRunnable() {
public void run() {
l.selectionChanged(event);
}
});
}
}
}
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