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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:
* Camille Letavernier (CEA LIST) camille.letavernier@cea.fr - Initial API and implementation
*****************************************************************************/
package org.eclipse.papyrus.properties.generation.wizard.widget;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Set;
import org.eclipse.core.resources.IFile;
import org.eclipse.emf.common.ui.dialogs.WorkspaceResourceDialog;
import org.eclipse.jface.viewers.ViewerFilter;
import org.eclipse.papyrus.properties.generation.messages.Messages;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Text;
/**
* A Widget for selecting or creating a file in the workspace
*
* @author Camille Letavernier
*/
public class FileChooser extends Composite implements SelectionListener, Listener {
private Text text;
private Button browse;
private IFile currentFile;
private List<ViewerFilter> filters;
private Set<Listener> listeners = new HashSet<Listener>();
private boolean newFile;
/**
* Constructs a new FileChooser in the given Composite
*
* @param parent
* The composite in which the FileChooser is created
* @param newFile
* True if the fileChooser allows the user to create a new file,
* false if he should select an existing one
*/
public FileChooser(Composite parent, boolean newFile) {
super(parent, SWT.NONE);
setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false));
GridLayout layout = new GridLayout(2, false);
layout.marginWidth = 0;
setLayout(layout);
text = new Text(this, SWT.BORDER);
text.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false));
text.addListener(SWT.FocusOut, this);
browse = new Button(this, SWT.PUSH);
browse.setText(Messages.FileChooser_browseWorkspace);
browse.addSelectionListener(this);
filters = new LinkedList<ViewerFilter>();
this.newFile = newFile;
}
/**
* @return the selected file path
*/
public String getFilePath() {
String path = text.getText();
if(path.trim().equals("")) { //$NON-NLS-1$
return null;
}
return path.trim();
}
/**
* Sets the file extensions that this FileChooser accepts
* Files that don't match one of these extensions will be hidden
*
* @param extensions
*/
public void setFilterExtensions(String[] extensions) {
filters.clear();
ExtensionFilter filter = new ExtensionFilter(extensions);
filters.add(filter);
}
public void handleEvent(Event event) {
notifyChange();
}
/**
* Add a listener to this widget. The listener will be notified when the user
* choose a new file
*
* @param listener
*/
public void addListener(Listener listener) {
listeners.add(listener);
}
public void widgetSelected(SelectionEvent e) {
IFile[] result = new IFile[0];
if(newFile) {
IFile file = WorkspaceResourceDialog.openNewFile(getShell(), null, null, null, filters);
if(file != null)
result = new IFile[]{ file };
} else {
result = WorkspaceResourceDialog.openFileSelection(getShell(), null, null, false, new Object[]{ currentFile }, filters);
}
if(result.length >= 1) {
currentFile = result[0];
text.setText(currentFile.getFullPath().toString());
notifyChange();
}
}
private void notifyChange() {
for(Listener listener : listeners) {
listener.handleEvent(null);
}
}
public void widgetDefaultSelected(SelectionEvent e) {
//Nothing
}
}
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