FolderSelectionDialog.java example

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tern.java-master
/**
 *  Copyright (c) 2013-2016 Angelo ZERR.
 *  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:
 *  Angelo Zerr <angelo.zerr@gmail.com> - initial API and implementation
 */
package tern.eclipse.ide.ui.dialogs;

import org.eclipse.core.resources.IContainer;
import org.eclipse.jface.viewers.ILabelProvider;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.window.Window;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.dialogs.ElementTreeSelectionDialog;
import org.eclipse.ui.dialogs.NewFolderDialog;

import tern.eclipse.ide.internal.ui.TernUIMessages;

/**
 * Folder selection dialog.
 */
public class FolderSelectionDialog extends ElementTreeSelectionDialog implements
		ISelectionChangedListener {
	private Button fNewFolderButton;
	private IContainer fSelectedContainer;

	public FolderSelectionDialog(Shell parent, ILabelProvider labelProvider,
			ITreeContentProvider contentProvider) {
		super(parent, labelProvider, contentProvider);
		// setComparator(new ResourceComparator(ResourceComparator.NAME));
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.eclipse.jface.dialogs.Dialog#createDialogArea(org.eclipse.swt.widgets
	 * .Composite)
	 */
	@Override
	protected Control createDialogArea(Composite parent) {
		Composite result = (Composite) super.createDialogArea(parent);

		getTreeViewer().addSelectionChangedListener(this);

		Button button = new Button(result, SWT.PUSH);
		button.setText(TernUIMessages.Button_newFolder);
		button.addSelectionListener(new SelectionAdapter() {
			@Override
			public void widgetSelected(SelectionEvent event) {
				newFolderButtonPressed();
			}
		});
		button.setFont(parent.getFont());
		fNewFolderButton = button;

		applyDialogFont(result);

		return result;
	}

	private void updateNewFolderButtonState() {
		IStructuredSelection selection = (IStructuredSelection) getTreeViewer()
				.getSelection();
		fSelectedContainer = null;
		if (selection.size() == 1) {
			Object first = selection.getFirstElement();
			if (first instanceof IContainer) {
				fSelectedContainer = (IContainer) first;
			}
		}
		fNewFolderButton.setEnabled(fSelectedContainer != null);
	}

	protected void newFolderButtonPressed() {
		NewFolderDialog dialog = new NewFolderDialog(getShell(),
				fSelectedContainer);
		if (dialog.open() == Window.OK) {
			TreeViewer treeViewer = getTreeViewer();
			treeViewer.refresh(fSelectedContainer);
			Object createdFolder = dialog.getResult()[0];
			treeViewer.reveal(createdFolder);
			treeViewer.setSelection(new StructuredSelection(createdFolder));
		}
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.eclipse.jface.viewers.ISelectionChangedListener#selectionChanged(
	 * org.eclipse.jface.viewers.SelectionChangedEvent)
	 */
	public void selectionChanged(SelectionChangedEvent event) {
		updateNewFolderButtonState();
	}
}