Java tutorial
/* * Copyright (c) 2007 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 */ package org.csstudio.opibuilder.visualparts; import org.csstudio.opibuilder.persistence.URLPath; import org.csstudio.opibuilder.util.ResourceUtil; import org.csstudio.ui.util.composites.ResourceSelectionGroup; import org.eclipse.core.runtime.IPath; import org.eclipse.core.runtime.Path; import org.eclipse.jface.dialogs.Dialog; import org.eclipse.jface.dialogs.IDialogConstants; import org.eclipse.swt.SWT; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; 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.Control; import org.eclipse.swt.widgets.Event; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Listener; import org.eclipse.swt.widgets.Shell; import org.eclipse.swt.widgets.Text; /** * This class represents a Dialog to choose a file in the workspace. * There is an option to return relative path. * * @author Kai Meyer, Joerg Rathlev, Xihui Chen */ public final class RelativePathSelectionDialog extends Dialog implements Listener { /** * The message to display, or <code>null</code> if none. */ private String _message; /** * The {@link WorkspaceTreeComposite} for this dialog. */ private ResourceSelectionGroup _resourceSelectionGroup; /** * The file extensions of files that will be shown for selection. */ private String[] _fileExtensions; /** * The path of the selected resource. */ private IPath _path; private IPath refPath; private Text _resourcePathText; private boolean relative; /** * Creates an input dialog with OK and Cancel buttons. Note that the dialog * will have no visual representation (no widgets) until it is told to open. * <p> * Note that the <code>open</code> method blocks for input dialogs. * </p> * * @param parentShell * the parent shell, or <code>null</code> to create a top-level * shell * @param refPath * the reference path which doesn't include the file name. * @param dialogMessage * the dialog message, or <code>null</code> if none * @param fileExtensions * the file extensions of files to show in the dialog. Use an * empty array or <code>null</code> to show only containers * (folders). */ public RelativePathSelectionDialog(final Shell parentShell, final IPath refPath, final String dialogMessage, final String[] fileExtensions) { super(parentShell); this.setShellStyle(SWT.MODELESS | SWT.CLOSE | SWT.MAX | SWT.TITLE | SWT.BORDER | SWT.RESIZE); _message = dialogMessage; this.refPath = refPath; relative = true; _fileExtensions = fileExtensions; } /** * Sets the initially selected resource. Must be called before the dialog is * displayed. * * @param path * the path to the initially selected resource. */ public void setSelectedResource(final IPath path) { _path = path; relative = !path.isAbsolute(); } /** * {@inheritDoc} */ @Override protected void configureShell(final Shell shell) { super.configureShell(shell); shell.setText("Resources"); } /** * {@inheritDoc} */ @Override protected Control createDialogArea(final Composite parent) { Composite composite = (Composite) super.createDialogArea(parent); composite.setLayout(new GridLayout(1, false)); if (_message != null) { Label label = new Label(composite, SWT.WRAP); label.setText(_message); GridData data = new GridData( GridData.GRAB_HORIZONTAL | GridData.HORIZONTAL_ALIGN_FILL | GridData.VERTICAL_ALIGN_CENTER); data.horizontalSpan = 2; data.widthHint = convertHorizontalDLUsToPixels(IDialogConstants.MINIMUM_MESSAGE_AREA_WIDTH); label.setLayoutData(data); } // The New Project and New Folder actions will be shown if there are // no file extensions, i.e. if the dialog is opened to select a folder. boolean showNewContainerActions = (_fileExtensions == null || _fileExtensions.length == 0); _resourceSelectionGroup = new ResourceSelectionGroup(composite, this, _fileExtensions, showNewContainerActions); new Label(composite, SWT.NONE).setText("Resource Path:"); _resourcePathText = new Text(composite, SWT.SINGLE | SWT.LEAD | SWT.BORDER); _resourcePathText.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false)); if (_path != null && !_path.isEmpty()) { _resourcePathText.setText(_path.toString()); if (!(_path instanceof URLPath)) { if (relative) _resourceSelectionGroup.setSelectedResource(refPath.append(_path)); else _resourceSelectionGroup.setSelectedResource(_path); } } //the check box for relative path final Button checkBox = new Button(composite, SWT.CHECK); checkBox.setSelection(relative); checkBox.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false)); checkBox.setText("Return relative path"); checkBox.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { relative = checkBox.getSelection(); if (relative) _resourcePathText.setText(ResourceUtil.buildRelativePath(refPath, _path).toString()); else _resourcePathText.setText(_path.toString()); } }); return composite; } /** * {@inheritDoc} */ @Override protected void okPressed() { if (ResourceUtil.isURL(_resourcePathText.getText())) _path = new URLPath(_resourcePathText.getText()); else _path = new Path(_resourcePathText.getText()); super.okPressed(); } /** * Returns the path to the selected resource. * * @return the path to the selected resource, or <code>null</code> if no * resource was selected. */ public IPath getSelectedResource() { return _path; } @Override public void handleEvent(Event event) { ResourceSelectionGroup widget = (ResourceSelectionGroup) event.widget; _path = widget.getFullPath(); if (_path == null) return; if (relative) _resourcePathText.setText(ResourceUtil.buildRelativePath(refPath, _path).toString()); else _resourcePathText.setText(_path.toString()); if (event.type == SWT.MouseDoubleClick) { okPressed(); } } }