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/*
* Copyright (c) 2014, 2015 Eike Stepper (Loehne, Germany) and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v2.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v20.html
*
* Contributors:
* Eike Stepper - initial API and implementation
*/
package org.eclipse.oomph.ui;
import org.eclipse.oomph.util.ReflectUtil;
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.jface.viewers.Viewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.KeyAdapter;
import org.eclipse.swt.events.KeyEvent;
import org.eclipse.swt.events.TraverseEvent;
import org.eclipse.swt.events.TraverseListener;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Text;
import org.eclipse.swt.widgets.Tree;
import org.eclipse.ui.IWorkbenchPreferenceConstants;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.dialogs.FilteredTree;
import org.eclipse.ui.dialogs.PatternFilter;
/**
* @author Eike Stepper
*/
public class SearchField extends Composite
{
private final FilteredTree filteredTree;
public SearchField(Composite parent, final FilterHandler filterHandler)
{
super(parent, SWT.NONE);
setLayout(new FirstChildLayout());
final PatternFilter patternFilter = new PatternFilter()
{
@Override
public Object[] filter(Viewer viewer, Object parent, Object[] elements)
{
if (filteredTree != null)
{
Text filterControl = filteredTree.getFilterControl();
String filter = filterControl.getText();
filterHandler.handleFilter(filter);
}
return new Object[0];
}
};
filteredTree = new FilteredTree(this, SWT.NONE, patternFilter, true)
{
@Override
@SuppressWarnings("restriction")
protected void init(int treeStyle, PatternFilter filter)
{
ReflectUtil.setValue("patternFilter", this, filter);
showFilterControls = PlatformUI.getPreferenceStore().getBoolean(IWorkbenchPreferenceConstants.SHOW_FILTERED_TEXTS);
createControl(SearchField.this, treeStyle);
Job refreshJob = new Job("Refresh Filter")
{
@Override
protected IStatus run(IProgressMonitor monitor)
{
UIUtil.syncExec(new Runnable()
{
public void run()
{
patternFilter.filter(treeViewer, (Object)null, null);
String text = getFilterString();
updateToolbar(text != null && text.length() > 0 && !(initialText != null && initialText.equals(text)));
}
});
return Status.OK_STATUS;
}
};
refreshJob.setSystem(true);
ReflectUtil.setValue("refreshJob", this, refreshJob);
setInitialText(org.eclipse.ui.internal.WorkbenchMessages.FilteredTree_FilterMessage);
setFont(SearchField.this.getFont());
}
@Override
protected void createControl(Composite xxx, int treeStyle)
{
super.createControl(SearchField.this, treeStyle);
Tree tree = treeViewer.getTree();
tree.setParent(SearchField.this);
tree.setLayoutData(new GridData(0, 0));
treeComposite.dispose();
treeComposite = null;
}
};
final Text filterControl = filteredTree.getFilterControl();
filterControl.addTraverseListener(new TraverseListener()
{
public void keyTraversed(TraverseEvent e)
{
if (e.keyCode == SWT.ESC)
{
if (!"".equals(filterControl.getText()))
{
filterControl.setText("");
e.doit = false;
}
}
}
});
filterControl.addKeyListener(new KeyAdapter()
{
@Override
public void keyPressed(KeyEvent e)
{
if (e.keyCode == SWT.CR || e.keyCode == SWT.ARROW_DOWN)
{
finishFilter();
e.doit = false;
}
}
});
}
public final PatternFilter getPatternFilter()
{
return filteredTree.getPatternFilter();
}
public final Text getFilterControl()
{
return filteredTree.getFilterControl();
}
public final void setInitialText(String text)
{
filteredTree.setInitialText(text);
}
@Override
public final boolean getEnabled()
{
return filteredTree.getEnabled();
}
@Override
public void setEnabled(boolean enabled)
{
filteredTree.setEnabled(enabled);
}
@Override
public boolean setFocus()
{
return getFilterControl().setFocus();
}
/**
* Subclasses may override.
* @param e
*/
protected void finishFilter()
{
// Do nothing.
}
/**
* @author Eike Stepper
*/
public interface FilterHandler
{
public void handleFilter(String filter);
}
}
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