Java tutorial
/* * Copyright (c) 2011 Stiftung Deutsches Elektronen-Synchrotron, * Member of the Helmholtz Association, (DESY), HAMBURG, GERMANY. * * THIS SOFTWARE IS PROVIDED UNDER THIS LICENSE ON AN "../AS IS" BASIS. * WITHOUT WARRANTY OF ANY KIND, EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED * TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR PARTICULAR PURPOSE AND * NON-INFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE * FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * THE USE OR OTHER DEALINGS IN THE SOFTWARE. SHOULD THE SOFTWARE PROVE DEFECTIVE * IN ANY RESPECT, THE USER ASSUMES THE COST OF ANY NECESSARY SERVICING, REPAIR OR * CORRECTION. THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS LICENSE. * NO USE OF ANY SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER THIS DISCLAIMER. * DESY HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, * OR MODIFICATIONS. * THE FULL LICENSE SPECIFYING FOR THE SOFTWARE THE REDISTRIBUTION, MODIFICATION, * USAGE AND OTHER RIGHTS AND OBLIGATIONS IS INCLUDED WITH THE DISTRIBUTION OF THIS * PROJECT IN THE FILE LICENSE.HTML. IF THE LICENSE IS NOT INCLUDED YOU MAY FIND A COPY * AT HTTP://WWW.DESY.DE/LEGAL/LICENSE.HTM * * $Id: DesyKrykCodeTemplates.xml,v 1.7 2010/04/20 11:43:22 bknerr Exp $ */ package org.csstudio.domain.common.ui; //import org.eclipse.core.internal.resources.File; import org.eclipse.core.resources.IFile; import org.eclipse.core.resources.IResource; import org.eclipse.core.resources.IWorkspace; import org.eclipse.core.resources.ResourcesPlugin; import org.eclipse.core.runtime.IPath; import org.eclipse.jface.preference.StringButtonFieldEditor; import org.eclipse.jface.resource.JFaceResources; import org.eclipse.jface.viewers.Viewer; import org.eclipse.jface.viewers.ViewerFilter; import org.eclipse.jface.window.Window; import org.eclipse.swt.widgets.Composite; import org.eclipse.ui.dialogs.ElementTreeSelectionDialog; import org.eclipse.ui.model.WorkbenchContentProvider; import org.eclipse.ui.model.WorkbenchLabelProvider; /** * TODO (hrickens) : * * @author hrickens * @author $Author: hrickens $ * @version $Revision: 1.7 $ * @since 11.04.2011 */ public class WorkspaceDirectoryFieldEditor extends StringButtonFieldEditor { /** * Initial path for the Browse dialog. */ private IResource _filterPath; private final IWorkspace _workspace; /** * Creates a new directory field editor */ protected WorkspaceDirectoryFieldEditor() { _workspace = ResourcesPlugin.getWorkspace(); } /** * Creates a directory field editor. * * @param name the name of the preference this field editor works on * @param labelText the label text of the field editor * @param parent the parent of the field editor's control */ public WorkspaceDirectoryFieldEditor(final String name, final String labelText, final Composite parent) { _workspace = ResourcesPlugin.getWorkspace(); init(name, labelText); setErrorMessage(JFaceResources.getString("DirectoryFieldEditor.errorMessage"));//$NON-NLS-1$ setChangeButtonText(JFaceResources.getString("openBrowse"));//$NON-NLS-1$ setValidateStrategy(VALIDATE_ON_FOCUS_LOST); createControl(parent); } /* (non-Javadoc) * Method declared on StringButtonFieldEditor. * Opens the directory chooser dialog and returns the selected directory. */ @Override protected String changePressed() { IResource findMember = _workspace.getRoot().findMember(getTextControl().getText()); if (!findMember.exists()) { findMember = null; } return getDirectory(findMember); } /* (non-Javadoc) * Method declared on StringFieldEditor. * Checks whether the text input field contains a valid directory. */ @Override protected boolean doCheckState() { String fileName = getTextControl().getText(); fileName = fileName.trim(); if (fileName.length() == 0 && isEmptyStringAllowed()) { return true; } final IResource findMember = _workspace.getRoot().findMember(fileName); if (findMember == null) { return false; } final int type = findMember.getType(); boolean state = false; switch (type) { case IResource.PROJECT: case IResource.FOLDER: state = true; break; default: state = false; break; } return state; } /** * Helper that opens the directory chooser dialog. * @param startingDirectory The directory the dialog will open in. * @return File File or <code>null</code>. * */ private String getDirectory(final IResource startingDirectory) { final ElementTreeSelectionDialog fileDialog = new ElementTreeSelectionDialog(getShell(), new WorkbenchLabelProvider(), new WorkbenchContentProvider()); if (startingDirectory != null) { fileDialog.setInitialSelection(startingDirectory); } else if (_filterPath != null) { fileDialog.setInitialSelection(_filterPath.getFullPath()); } fileDialog.addFilter(new ViewerFilter() { @Override public boolean select(final Viewer viewer, final Object parentElement, final Object element) { return !(element instanceof IFile); } }); fileDialog.setInput(_workspace.getRoot()); final int status = fileDialog.open(); if (status == Window.OK) { final IResource firstResult = (IResource) fileDialog.getFirstResult(); final IPath fullPath = firstResult.getFullPath(); return fullPath.toString(); } return null; } /** * Sets the initial path for the Browse dialog. * @param path initial path for the Browse dialog * @since 3.6 */ public void setFilterPath(final IResource path) { _filterPath = path; } }