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/*
* Copyright (c) 2004 - 2012 Eike Stepper (Berlin, Germany) and others.
* 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:
* Eike Stepper - initial API and implementation
*/
package org.eclipse.emf.cdo.ui.widgets;
import org.eclipse.emf.cdo.common.branch.CDOBranch;
import org.eclipse.emf.cdo.internal.ui.bundle.OM;
import org.eclipse.emf.cdo.session.CDOSession;
import org.eclipse.emf.cdo.ui.CDOItemProvider;
import org.eclipse.net4j.util.collection.IHistory;
import org.eclipse.net4j.util.collection.PreferenceHistory;
import org.eclipse.net4j.util.om.pref.OMPreference;
import org.eclipse.net4j.util.ui.UIUtil;
import org.eclipse.net4j.util.ui.ValidationContext;
import org.eclipse.net4j.util.ui.ValidationParticipant;
import org.eclipse.net4j.util.ui.widgets.HistoryText;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Listener;
/**
* UI widget that provides visualization of all available {@link org.eclipse.emf.cdo.common.branch.CDOBranch branches},
* and with the capability to select one.
*
* @author Eike Stepper
* @since 4.0
*/
public class SelectBranchComposite extends Composite implements ValidationParticipant
{
private ValidationContext validationContext;
private CDOSession session;
private CDOBranch branch;
private IHistory<String> branchHistory;
private HistoryText branchText;
private TreeViewer branchViewer;
public SelectBranchComposite(Composite parent, int style, CDOSession session, CDOBranch branch)
{
super(parent, style);
this.session = session;
this.branch = branch;
GridLayout gridLayout = UIUtil.createGridLayout(1);
gridLayout.marginHeight = 5;
gridLayout.horizontalSpacing = 5;
gridLayout.verticalSpacing = 5;
setLayout(gridLayout);
String prefName = "PREF_HISTORY_BRANCHES-" + session.getRepositoryInfo().getUUID(); //$NON-NLS-1$
OMPreference<String[]> pref = OM.PREFS.getArray(prefName);
if (pref == null)
{
pref = OM.PREFS.initArray(prefName);
}
branchHistory = new PreferenceHistory(pref);
branchText = new HistoryText(this, SWT.BORDER | SWT.SINGLE, branchHistory);
branchText.getCombo().setLayoutData(new GridData(SWT.FILL, SWT.BEGINNING, true, false));
branchText.getCombo().addModifyListener(new ModifyListener()
{
public void modifyText(ModifyEvent e)
{
setBranchFromPath();
}
});
CDOItemProvider itemProvider = new CDOItemProvider(null);
branchViewer = new TreeViewer(this, SWT.BORDER | SWT.SINGLE);
branchViewer.getTree().setLayoutData(UIUtil.createGridData());
branchViewer.setLabelProvider(itemProvider);
branchViewer.setContentProvider(itemProvider);
branchViewer.setInput(session.getBranchManager());
branchViewer.addSelectionChangedListener(new ISelectionChangedListener()
{
public void selectionChanged(SelectionChangedEvent event)
{
setBranchFromViewer();
}
});
branchText.setFocus();
setBranchFromPath();
}
public ValidationContext getValidationContext()
{
return validationContext;
}
public void setValidationContext(ValidationContext validationContext)
{
this.validationContext = validationContext;
}
public CDOSession getSession()
{
return session;
}
public CDOBranch getBranch()
{
return branch;
}
public HistoryText getBranchText()
{
return branchText;
}
public TreeViewer getBranchViewer()
{
return branchViewer;
}
public void rememberSettings()
{
branchText.getHistory().add(branch.getPathName());
}
@Override
public void addListener(int eventType, Listener listener)
{
super.addListener(eventType, listener);
branchText.addListener(eventType, listener);
branchViewer.getTree().addListener(eventType, listener);
}
@Override
public void removeListener(int eventType, Listener listener)
{
super.removeListener(eventType, listener);
branchText.removeListener(eventType, listener);
branchViewer.getTree().removeListener(eventType, listener);
}
protected void branchChanged(CDOBranch newBranch)
{
}
private void setBranchFromPath()
{
String branchPath = branchText.getText();
CDOBranch newBranch = session.getBranchManager().getBranch(branchPath);
if (newBranch != branch)
{
branch = newBranch;
if (newBranch != null)
{
branchViewer.reveal(branch);
branchViewer.setSelection(new StructuredSelection(branch));
}
else
{
branchViewer.setSelection(StructuredSelection.EMPTY);
}
branchChanged(newBranch);
}
validate();
}
private void setBranchFromViewer()
{
IStructuredSelection selection = (IStructuredSelection)branchViewer.getSelection();
CDOBranch newBranch = (CDOBranch)selection.getFirstElement();
if (newBranch != branch)
{
branch = newBranch;
branchText.setText(branch.getPathName());
branchChanged(newBranch);
}
validate();
}
private void validate()
{
if (validationContext != null)
{
validationContext.setValidationError(branchText.getCombo(), branch != null ? null : "Branch does not exist.");
}
}
}
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