Java tutorial
/////////////////////////////////////////////////////////////////////////////// // // PACKAGE : com.astra.ses.spell.gui.presentation.code.dialogs // // FILE : SearchDialog.java // // DATE : 2008-11-21 08:55 // // 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 // // SUBPROJECT: SPELL GUI Client // /////////////////////////////////////////////////////////////////////////////// package com.astra.ses.spell.gui.presentation.code.dialogs; import org.eclipse.jface.dialogs.IDialogConstants; import org.eclipse.jface.dialogs.MessageDialog; import org.eclipse.jface.dialogs.TitleAreaDialog; import org.eclipse.jface.resource.ImageDescriptor; 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 org.eclipse.swt.widgets.Text; import com.astra.ses.spell.gui.presentation.code.Activator; import com.astra.ses.spell.gui.presentation.code.controls.CodeViewer; /******************************************************************************* * @brief Dialog for searching in code * @date 18/09/07 ******************************************************************************/ public class SearchDialog extends TitleAreaDialog { // ========================================================================= // # STATIC DATA MEMBERS // ========================================================================= // PRIVATE ----------------------------------------------------------------- private static final String BTN_FIND_TITLE = "Find"; private static final String BTN_FIND_NEXT_TITLE = "Find next"; private static final String BTN_FIND_PREV_TITLE = "Find previous"; private static final String BTN_CLEAR_CLOSE_TITLE = "Clear search & Close"; private static final int BTN_FIND_CODE = 122; private static final int BTN_FIND_NEXT_CODE = 123; private static final int BTN_FIND_PREV_CODE = 124; private static final int BTN_CLEAR_CLOSE_CODE = 125; // PROTECTED --------------------------------------------------------------- // PUBLIC ------------------------------------------------------------------ // ========================================================================= // # INSTANCE DATA MEMBERS // ========================================================================= // PRIVATE ----------------------------------------------------------------- /** Holds the dialog image icon */ private Image m_image; /** Holds the search text control */ private Text m_text; /** Holds the code viewer reference */ private CodeViewer m_viewer; /** Holds the latest number of occurrences */ private static int m_occurrences = 0; /** Holds the latest search text */ private static String m_lastSearch = null; // PROTECTED --------------------------------------------------------------- // PUBLIC ------------------------------------------------------------------ // ========================================================================= // # ACCESSIBLE METHODS // ========================================================================= /*************************************************************************** * Constructor * * @param shell * The parent shell **************************************************************************/ public SearchDialog(Shell shell, CodeViewer viewer) { super(shell); setShellStyle(SWT.CLOSE); // Obtain the image for the dialog icon ImageDescriptor descr = Activator.getImageDescriptor("icons/dlg_detail.png"); m_image = descr.createImage(); m_viewer = viewer; } /*************************************************************************** * 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); setTitle("Search text in procedure"); if (!m_viewer.hasMatches()) { m_occurrences = 0; m_lastSearch = null; } if (m_occurrences == 0) { setMessage("Type in the text to search"); } else { setMessage(m_occurrences + " occurrences found."); } setTitleImage(m_image); return contents; } /*************************************************************************** * Create the dialog area contents. * * @param parent * The base composite of the dialog * @return The resulting contents **************************************************************************/ 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 = 300; top.setLayoutData(areaData); GridLayout layout = new GridLayout(); layout.marginHeight = 5; layout.marginWidth = 5; layout.marginTop = 5; layout.marginBottom = 5; layout.marginLeft = 5; layout.marginRight = 5; layout.numColumns = 1; top.setLayout(layout); m_text = new Text(top, SWT.SINGLE | SWT.BORDER); m_text.setLayoutData(new GridData(GridData.FILL_HORIZONTAL)); if (m_lastSearch != null) { m_text.setText(m_lastSearch); } return parent; } /*************************************************************************** * Create the button bar buttons. * * @param parent * The Button Bar. **************************************************************************/ protected void createButtonsForButtonBar(Composite parent) { createButton(parent, BTN_FIND_CODE, BTN_FIND_TITLE, true); createButton(parent, BTN_FIND_PREV_CODE, BTN_FIND_PREV_TITLE, false); createButton(parent, BTN_FIND_NEXT_CODE, BTN_FIND_NEXT_TITLE, false); createButton(parent, BTN_CLEAR_CLOSE_CODE, BTN_CLEAR_CLOSE_TITLE, false); createButton(parent, IDialogConstants.CLOSE_ID, IDialogConstants.CLOSE_LABEL, false); getButton(BTN_FIND_NEXT_CODE).setEnabled(false); getButton(BTN_FIND_PREV_CODE).setEnabled(false); getButton(BTN_CLEAR_CLOSE_CODE).setEnabled(false); } /*************************************************************************** * Called when one of the buttons of the button bar is pressed. * * @param buttonId * The button identifier. **************************************************************************/ protected void buttonPressed(int buttonId) { switch (buttonId) { case BTN_FIND_CODE: String toSearch = m_text.getText(); if (toSearch.isEmpty()) { MessageDialog.openError(getShell(), "Cannot search", "Musty provide a search string"); } else { m_occurrences = m_viewer.searchString(toSearch); setMessage(m_occurrences + " occurrences found."); getButton(BTN_FIND_NEXT_CODE).setEnabled((m_occurrences > 0)); getButton(BTN_FIND_PREV_CODE).setEnabled((m_occurrences > 0)); getButton(BTN_CLEAR_CLOSE_CODE).setEnabled((m_occurrences > 0)); m_lastSearch = toSearch; } break; case BTN_FIND_NEXT_CODE: if (!m_viewer.searchNext()) { setMessage("No more occurrences"); } else { setMessage(m_occurrences + " occurrences found."); } break; case BTN_FIND_PREV_CODE: if (!m_viewer.searchPrevious()) { setMessage("At first occurrence"); } else { setMessage(m_occurrences + " occurrences found."); } break; case BTN_CLEAR_CLOSE_CODE: m_viewer.clearMatches(); // Fall thru case IDialogConstants.CLOSE_ID: close(); break; } } }