Java tutorial
/////////////////////////////////////////////////////////////////////////////// // // PACKAGE : com.astra.ses.spell.gui.dialogs // // FILE : ServerFileSelectionDialog.java // // DATE : Feb 8, 2012 // // Copyright (C) 2008, 2012 SES ENGINEERING, Luxembourg S.A.R.L. // // By using this software in any way, you are agreeing to be bound by // the terms of this license. // // 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 // // NO WARRANTY // EXCEPT AS EXPRESSLY SET FORTH IN THIS AGREEMENT, THE PROGRAM IS PROVIDED // ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, EITHER // EXPRESS OR IMPLIED INCLUDING, WITHOUT LIMITATION, ANY WARRANTIES OR // CONDITIONS OF TITLE, NON-INFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A // PARTICULAR PURPOSE. Each Recipient is solely responsible for determining // the appropriateness of using and distributing the Program and assumes all // risks associated with its exercise of rights under this Agreement , // including but not limited to the risks and costs of program errors, // compliance with applicable laws, damage to or loss of data, programs or // equipment, and unavailability or interruption of operations. // // DISCLAIMER OF LIABILITY // EXCEPT AS EXPRESSLY SET FORTH IN THIS AGREEMENT, NEITHER RECIPIENT NOR ANY // CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY DIRECT, INDIRECT, INCIDENTAL, // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING WITHOUT LIMITATION // LOST PROFITS), HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN // CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) // ARISING IN ANY WAY OUT OF THE USE OR DISTRIBUTION OF THE PROGRAM OR THE // EXERCISE OF ANY RIGHTS GRANTED HEREUNDER, EVEN IF ADVISED OF THE // POSSIBILITY OF SUCH DAMAGES. // // Contributors: // SES ENGINEERING - initial API and implementation and/or initial documentation // // PROJECT : SPELL // /////////////////////////////////////////////////////////////////////////////// package com.astra.ses.spell.gui.dialogs; import org.eclipse.jface.dialogs.IDialogConstants; import org.eclipse.jface.dialogs.TitleAreaDialog; import org.eclipse.jface.resource.ImageDescriptor; import org.eclipse.jface.viewers.ISelection; import org.eclipse.jface.viewers.ISelectionChangedListener; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.viewers.SelectionChangedEvent; import org.eclipse.swt.SWT; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Shell; import com.astra.ses.spell.gui.Activator; import com.astra.ses.spell.gui.core.model.server.DirectoryFile; import com.astra.ses.spell.gui.core.model.server.DirectoryTree; import com.astra.ses.spell.gui.dialogs.controls.ServerDirectoryTreeViewer; /******************************************************************************* * @brief Dialog for server file selection ******************************************************************************/ public class ServerFileSelectionDialog extends TitleAreaDialog implements ISelectionChangedListener { public static final String ID = "com.astra.ses.spell.gui.dialogs.ServerFileSelectionDialog"; /** Holds the dialog image icon */ private Image m_image; private DirectoryTree m_tree; private ServerDirectoryTreeViewer m_viewer; private DirectoryFile m_selected; /*************************************************************************** * Constructor * * @param shell * The parent shell **************************************************************************/ public ServerFileSelectionDialog(Shell shell, DirectoryTree directory) { super(shell); // Obtain the image for the dialog icon ImageDescriptor descr = Activator.getImageDescriptor("icons/dlg_exec.png"); m_image = descr.createImage(); m_tree = directory; m_selected = null; } /*************************************************************************** * Defines the shell characteristics **************************************************************************/ protected void setShellStyle(int newShellStyle) { super.setShellStyle(SWT.CLOSE | SWT.MIN | SWT.MAX | SWT.RESIZE); } /*************************************************************************** * Called when the dialog is about to close. * * @return The superclass return value. **************************************************************************/ public boolean close() { m_image.dispose(); return super.close(); } // ========================================================================= // # NON-ACCESSIBLE METHODS // ========================================================================= /*************************************************************************** * Creates the dialog contents. * * @param parent * The base composite of the dialog * @return The resulting contents **************************************************************************/ protected Control createContents(Composite parent) { Control contents = super.createContents(parent); setMessage("Select a data file"); setTitle("Server file selection"); setTitleImage(m_image); getShell().setText("Server file selection"); return contents; } /*************************************************************************** * Create the dialog area contents. * * @param parent * The base composite of the dialog * @return The resulting contents **************************************************************************/ @Override protected Control createDialogArea(Composite parent) { // Main composite of the dialog area ----------------------------------- Composite top = new Composite(parent, SWT.NONE); GridData areaData = new GridData(GridData.FILL_BOTH); areaData.widthHint = 600; areaData.heightHint = 400; top.setLayoutData(areaData); GridLayout layout = new GridLayout(); layout.numColumns = 1; layout.verticalSpacing = 10; top.setLayout(layout); m_viewer = new ServerDirectoryTreeViewer(top); m_viewer.getControl().setLayoutData(new GridData(GridData.FILL_BOTH)); m_viewer.setInput(m_tree); m_viewer.refresh(); m_viewer.addSelectionChangedListener(this); return parent; } /*************************************************************************** * Create the button bar buttons. * * @param parent * The Button Bar. **************************************************************************/ @Override protected void createButtonsForButtonBar(Composite parent) { createButton(parent, IDialogConstants.OK_ID, IDialogConstants.OK_LABEL, false); getButton(IDialogConstants.OK_ID).setEnabled(false); createButton(parent, IDialogConstants.CANCEL_ID, IDialogConstants.CANCEL_LABEL, true); } /*************************************************************************** * Called when one of the buttons of the button bar is pressed. * * @param buttonId * The button identifier. **************************************************************************/ @Override protected void buttonPressed(int buttonId) { if (buttonId == IDialogConstants.OK_ID) { } else if (buttonId == IDialogConstants.CANCEL_ID) { m_selected = null; } close(); } @Override public void selectionChanged(SelectionChangedEvent event) { ISelection sel = event.getSelection(); if (!sel.isEmpty()) { IStructuredSelection isel = (IStructuredSelection) sel; Object selected = isel.getFirstElement(); if (selected instanceof DirectoryFile) { getButton(IDialogConstants.OK_ID).setEnabled(true); DirectoryFile file = (DirectoryFile) selected; setMessage("File selected: " + file.getFilename()); m_selected = file; } else { getButton(IDialogConstants.OK_ID).setEnabled(false); setMessage("Select a data file"); m_selected = null; } } else { setMessage("Select a data file"); m_selected = null; getButton(IDialogConstants.OK_ID).setEnabled(false); } } public DirectoryFile getSelectedFile() { return m_selected; } }