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/*******************************************************************************
* Copyright (c) 2010-2012 Mia-Software.
* 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:
* Nicolas Bros (Mia-Software) - initial API and implementation
* Nicolas Bros (Mia-Software) - Bug 334116 - common tree view with columns
* Nicolas Bros (Mia-Software) - Bug 372732 - [Facet] Rewrite the catalog views for 0.2
*******************************************************************************/
package org.eclipse.emf.facet.common.ui.internal.views;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.runtime.jobs.Job;
import org.eclipse.emf.facet.common.ui.internal.Activator;
import org.eclipse.emf.facet.common.ui.internal.Messages;
import org.eclipse.emf.facet.common.ui.internal.controls.PersistableColumn;
import org.eclipse.emf.facet.common.ui.internal.exported.views.IColumnDescription;
import org.eclipse.emf.facet.util.core.Logger;
import org.eclipse.jface.action.GroupMarker;
import org.eclipse.jface.action.MenuManager;
import org.eclipse.jface.viewers.ColumnLabelProvider;
import org.eclipse.jface.viewers.IContentProvider;
import org.eclipse.jface.viewers.IOpenListener;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.OpenEvent;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.osgi.util.NLS;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.ui.IMemento;
import org.eclipse.ui.IViewSite;
import org.eclipse.ui.IWorkbenchActionConstants;
import org.eclipse.ui.PartInitException;
import org.eclipse.ui.part.ViewPart;
public class ElementsView extends ViewPart {
private static final int JOB_SCHEDULE_DELAY = 500;
private final Collection<? extends IColumnDescription> columnDescriptions;
private final ITreeContentProvider contentProvider;
private final Object input;
private final List<PersistableColumn> columns = new ArrayList<PersistableColumn>();
private final Map<String, Integer> persistedValues = new HashMap<String, Integer>();
private TreeViewer treeViewer;
private Job refreshJob = null;
private final IOpenListener openListener;
private final String title;
private final Image titleImage;
public ElementsView(final Collection<? extends IColumnDescription> columnDescriptions,
final ITreeContentProvider contentProvider, final Object input, final String title, final Image titleImage, final IOpenListener openListener) {
this.columnDescriptions = columnDescriptions;
this.contentProvider = contentProvider;
this.input = input;
this.title = title;
this.titleImage = titleImage;
this.openListener = openListener;
}
public TreeViewer getViewer() {
return this.treeViewer;
}
@Override
public void createPartControl(final Composite parent) {
setPartName(this.title);
setTitleImage(this.titleImage);
parent.setLayout(new FillLayout());
this.treeViewer = new TreeViewer(parent, SWT.H_SCROLL | SWT.V_SCROLL | SWT.SINGLE
| SWT.FULL_SELECTION);
this.treeViewer.getTree().setLinesVisible(true);
this.treeViewer.getTree().setHeaderVisible(true);
this.treeViewer.addOpenListener(new IOpenListener() {
public void open(final OpenEvent event) {
ElementsView.this.open(event);
}
});
createColumns();
this.treeViewer.setContentProvider(getContentProvider());
createContextMenu();
getSite().setSelectionProvider(this.treeViewer);
refresh(false);
}
protected void createContextMenu() {
final MenuManager contextMenu = new MenuManager("#PopUp"); //$NON-NLS-1$
contextMenu.add(new GroupMarker(IWorkbenchActionConstants.MB_ADDITIONS));
final Menu menu = contextMenu.createContextMenu(getViewer().getControl());
getViewer().getControl().setMenu(menu);
getSite().registerContextMenu(contextMenu, getViewer());
}
protected void createColumns() {
for (IColumnDescription columnDescription : this.columnDescriptions) {
createColumn(columnDescription.getTitle(), columnDescription.getUniqueID(),
columnDescription.getDefaultWidth(), columnDescription.getColumnLabelProvider());
}
}
protected IContentProvider getContentProvider() {
return this.contentProvider;
}
protected void open(final OpenEvent event) {
if (this.openListener != null) {
this.openListener.open(event);
}
}
@Override
public void setFocus() {
this.treeViewer.getControl().setFocus();
}
/** Optionally delayed refresh */
protected void refresh(final boolean delayed) {
if (this.refreshJob == null) {
this.refreshJob = new Job(getRefreshMessage()) {
@Override
protected IStatus run(final IProgressMonitor monitor) {
doRefresh();
return Status.OK_STATUS;
}
};
}
// delayed until it stops changing
this.refreshJob.cancel();
if (delayed) {
this.refreshJob.setPriority(Job.DECORATE);
this.refreshJob.schedule(ElementsView.JOB_SCHEDULE_DELAY);
} else {
this.refreshJob.setPriority(Job.INTERACTIVE);
this.refreshJob.schedule();
}
}
protected String getRefreshMessage() {
return NLS.bind(Messages.ElementsView_refreshJobTitle, this.title);
}
protected Object getInput() {
return this.input;
}
protected void doRefresh() {
// Accesses the catalog, which can block if done inside the UI thread.
final Object viewerInput = getInput();
Display.getDefault().asyncExec(new Runnable() {
public void run() {
getViewer().setInput(viewerInput);
getViewer().refresh();
}
});
}
protected void createColumn(final String columnText, final String uniqueID,
final int defaultWidth, final ColumnLabelProvider columnLabelProvider) {
PersistableColumn persistableColumn = new PersistableColumn(columnText, uniqueID,
defaultWidth, columnLabelProvider, this.treeViewer);
this.columns.add(persistableColumn);
Integer width = this.persistedValues.get(uniqueID);
if (width != null) {
persistableColumn.setWidth(width.intValue());
}
}
@Override
public void saveState(final IMemento memento) {
super.saveState(memento);
try {
for (PersistableColumn column : this.columns) {
column.saveState(memento);
}
} catch (Exception e) {
Logger.logError(e, "Error saving view state", Activator.getDefault()); //$NON-NLS-1$
}
}
@Override
public void init(final IViewSite site, final IMemento memento) throws PartInitException {
super.init(site, memento);
if (memento != null) {
String[] attributeKeys = memento.getAttributeKeys();
for (String key : attributeKeys) {
this.persistedValues.put(key, memento.getInteger(key));
}
}
}
}
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