Java tutorial
/* * ParallelJ, framework for parallel computing * * Copyright (C) 2010 Atos Worldline or third-party contributors as * indicated by the @author tags or express copyright attribution * statements applied by the authors. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ package org.parallelj.code.generator.ui; import static org.eclipse.jface.dialogs.IDialogConstants.CANCEL_LABEL; import static org.eclipse.jface.dialogs.IDialogConstants.ENTRY_FIELD_WIDTH; import static org.eclipse.jface.dialogs.IDialogConstants.OK_ID; import static org.eclipse.jface.dialogs.IDialogConstants.OK_LABEL; import java.util.ArrayList; import java.util.List; import org.eclipse.core.resources.IFile; import org.eclipse.core.resources.IFolder; import org.eclipse.core.resources.IProject; import org.eclipse.core.resources.IResource; import org.eclipse.core.runtime.CoreException; import org.eclipse.core.runtime.Status; import org.eclipse.jface.dialogs.IDialogSettings; import org.eclipse.jface.dialogs.MessageDialog; import org.eclipse.jface.viewers.CheckStateChangedEvent; import org.eclipse.jface.viewers.CheckboxTableViewer; import org.eclipse.jface.viewers.ICheckStateListener; import org.eclipse.swt.SWT; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.events.SelectionListener; import org.eclipse.swt.graphics.Point; 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.Shell; import org.eclipse.ui.IWorkbenchWindow; import org.parallelj.code.generator.Activator; import org.parallelj.code.generator.core.Messages; import org.parallelj.code.generator.core.ParallelJGeneratorConstants; /** * SelectionDialog, adapted for ParallelJ, since it is able to retrieve all * Diagram models from a project * * @author Antoine Neveux * @version 1.0 * */ public abstract class SelectionDialog extends MessageDialog { private static final String DIALOG_SETTINGS_SECTION = "ClasDiagramsDialogSettings"; //$NON-NLS-1$ private static final String DIALOG_ORIGIN_X = "DIALOG_X_ORIGIN"; //$NON-NLS-1$ private static final String DIALOG_ORIGIN_Y = "DIALOG_Y_ORIGIN"; //$NON-NLS-1$ private static final String DIALOG_WIDTH = "DIALOG_WIDTH"; //$NON-NLS-1$ private static final String DIALOG_HEIGHT = "DIALOG_HEIGHT"; //$NON-NLS-1$ private static final String TOGGLE_SELECTED = "TOGGLE_SELECTED"; //$NON-NLS-1$ private Button allButton, selectButton; protected CheckboxTableViewer modelsTable; protected IProject currentProject = null; protected List<IFile> selectedModels = null; protected List<IFile> allModels = null; protected IWorkbenchWindow window = null; /** * Creates a new class diagrams dialog. * * @param window * the window to create it in * @param selection * the currently selected project */ public SelectionDialog(IWorkbenchWindow window, IProject selectedProject) { super(window.getShell(), Messages.UI_DIALOG_TITLE.message(), null, Messages.UI_DIALOG_MESSAGE.message(), QUESTION, new String[] { OK_LABEL, CANCEL_LABEL }, 0); this.currentProject = selectedProject; this.selectedModels = new ArrayList<IFile>(3); this.allModels = new ArrayList<IFile>(3); this.window = window; setShellStyle(SWT.RESIZE | getShellStyle()); } protected void buttonPressed(int buttonId) { final boolean openAll = allButton.getSelection(); super.buttonPressed(buttonId); if (buttonId != OK_ID) { return; } performOperation(openAll); } protected Control createCustomArea(Composite parent) { Composite area = new Composite(parent, SWT.NONE); GridLayout layout = new GridLayout(); layout.marginWidth = layout.marginHeight = 0; layout.numColumns = 2; layout.makeColumnsEqualWidth = true; area.setLayout(layout); area.setLayoutData(new GridData(GridData.FILL_BOTH)); SelectionListener updateEnablement = new SelectionAdapter() { public void widgetSelected(SelectionEvent e) { updateEnablement(); } }; IDialogSettings settings = getDialogSettings(DIALOG_SETTINGS_SECTION); boolean selectSelectedButton = settings.getBoolean(TOGGLE_SELECTED); allButton = new Button(area, SWT.RADIO); String projectName = currentProject != null ? currentProject.getName() : null; allButton.setText(Messages.UI_ALL_BUTTON_MESSAGE_PROJECT.message(projectName)); allButton.setSelection(!selectSelectedButton); allButton.addSelectionListener(updateEnablement); selectButton = new Button(area, SWT.RADIO); selectButton.setText(Messages.UI_SELECT_BUTTON_MESSAGE.message()); selectButton.setSelection(selectSelectedButton); selectButton.addSelectionListener(updateEnablement); createmodelSelectionTable(area); modelsTable.getTable().setEnabled(selectSelectedButton); return area; } private void searchModelsInFolder(IFolder folder) { if (folder.exists()) { try { for (IResource resource : folder.members()) { if (resource instanceof IFile // TODO change constants && "pjd".equals(((IFile) resource).getFileExtension())) { modelsTable.add(resource); allModels.add((IFile) resource); } else if (resource instanceof IFolder) { searchModelsInFolder((IFolder) resource); } } } catch (CoreException ce) { Activator.getDefault().getLog().log( new Status(Status.ERROR, Activator.PLUGIN_ID, "No models found in folder " + folder, ce)); } } } private void createmodelSelectionTable(Composite radioGroup) { modelsTable = CheckboxTableViewer.newCheckList(radioGroup, SWT.BORDER); modelsTable.setLabelProvider(new SelectionDialogLabelProvider()); IFolder folder = this.currentProject.getFolder(ParallelJGeneratorConstants.SRC_MAIN_RESOURCES); searchModelsInFolder(folder); GridData data = new GridData(GridData.FILL_BOTH); data.horizontalSpan = 2; data.widthHint = ENTRY_FIELD_WIDTH; data.heightHint = ENTRY_FIELD_WIDTH; modelsTable.getTable().setLayoutData(data); modelsTable.getTable().setEnabled(selectButton.getSelection()); modelsTable.addCheckStateListener(new ICheckStateListener() { public void checkStateChanged(CheckStateChangedEvent event) { if (event.getChecked() && !selectedModels.contains(event.getElement())) { selectedModels.add((IFile) event.getElement()); } else if (!event.getChecked() && selectedModels.contains(event.getElement())) { selectedModels.remove((IFile) event.getElement()); } updateEnablement(); } }); } /** * Performs the actual operation. */ protected abstract void performOperation(boolean allSelected); /** * Updates the enablement of the dialog's ok button based on the current * choices in the dialog. */ protected void updateEnablement() { modelsTable.getTable().setEnabled(selectButton.getSelection()); boolean enabled = allButton.getSelection() || selectedModels.size() > 0; getButton(OK).setEnabled(enabled); } public boolean close() { persistDialogSettings(getShell(), DIALOG_SETTINGS_SECTION); return super.close(); } protected Point getInitialLocation(Point initialSize) { Point p = getInitialLocation(DIALOG_SETTINGS_SECTION); return p != null ? p : super.getInitialLocation(initialSize); } protected Point getInitialSize() { Point p = super.getInitialSize(); return getInitialSize(DIALOG_SETTINGS_SECTION, p); } /** * Returns the initial location which is persisted in the Ant UI Plugin * dialog settings under the provided dialog setttings section name. If * location is not persisted in the settings, the <code>null</code> is * returned. * * @param dialogSettingsSectionName * The name of the dialog settings section * @return The initial location or <code>null</code> */ public Point getInitialLocation(String dialogSettingsSectionName) { IDialogSettings settings = getDialogSettings(dialogSettingsSectionName); try { int x = settings.getInt(DIALOG_ORIGIN_X); int y = settings.getInt(DIALOG_ORIGIN_Y); return new Point(x, y); } catch (NumberFormatException e) { } return null; } private IDialogSettings getDialogSettings(String dialogSettingsSectionName) { IDialogSettings settings = Activator.getDefault().getDialogSettings(); IDialogSettings section = settings.getSection(dialogSettingsSectionName); if (section == null) { section = settings.addNewSection(dialogSettingsSectionName); } return section; } /** * Persists the location and dimensions of the shell and other user settings * in the plugin's dialog settings under the provided dialog settings * section name * * @param shell * The shell whose geometry is to be stored * @param dialogSettingsSectionName * The name of the dialog settings section */ private void persistDialogSettings(Shell shell, String dialogSettingsSectionName) { Point shellLocation = shell.getLocation(); Point shellSize = shell.getSize(); IDialogSettings settings = getDialogSettings(dialogSettingsSectionName); settings.put(DIALOG_ORIGIN_X, shellLocation.x); settings.put(DIALOG_ORIGIN_Y, shellLocation.y); settings.put(DIALOG_WIDTH, shellSize.x); settings.put(DIALOG_HEIGHT, shellSize.y); settings.put(TOGGLE_SELECTED, selectButton.getSelection()); } /** * Returns the initial size which is the larger of the * <code>initialSize</code> or the size persisted in the Ant UI Plugin * dialog settings under the provided dialog setttings section name. If no * size is persisted in the settings, the <code>initialSize</code> is * returned. * * @param initialSize * The initialSize to compare against * @param dialogSettingsSectionName * The name of the dialog settings section * @return the initial size */ private Point getInitialSize(String dialogSettingsSectionName, Point initialSize) { IDialogSettings settings = getDialogSettings(dialogSettingsSectionName); try { int x, y; x = settings.getInt(DIALOG_WIDTH); y = settings.getInt(DIALOG_HEIGHT); return new Point(Math.max(x, initialSize.x), Math.max(y, initialSize.y)); } catch (NumberFormatException e) { } return initialSize; } }