Java tutorial
/* * Copyright (c) 2011, the Dart project authors. * * Licensed under the Eclipse Public License v1.0 (the "License"); you may not use this file except * in compliance with the License. You may obtain a copy of the License at * * http://www.eclipse.org/legal/epl-v10.html * * Unless required by applicable law or agreed to in writing, software distributed under the License * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express * or implied. See the License for the specific language governing permissions and limitations under * the License. */ package com.google.dart.tools.ui.internal.cleanup.preference; import com.google.dart.tools.core.DartCore; import com.google.dart.tools.core.model.DartModel; import com.google.dart.tools.core.model.DartProject; import com.google.dart.tools.ui.DartElementComparator; import com.google.dart.tools.ui.DartElementLabelProvider; import com.google.dart.tools.ui.DartToolsPlugin; import com.google.dart.tools.ui.StandardDartElementContentProvider; import com.google.dart.tools.ui.internal.dialogs.StatusInfo; import com.google.dart.tools.ui.internal.preferences.PreferencesMessages; import org.eclipse.core.resources.ResourcesPlugin; import org.eclipse.core.runtime.IStatus; import org.eclipse.jface.dialogs.Dialog; import org.eclipse.jface.dialogs.IDialogSettings; import org.eclipse.jface.viewers.DoubleClickEvent; import org.eclipse.jface.viewers.IDoubleClickListener; import org.eclipse.jface.viewers.ISelectionChangedListener; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.viewers.SelectionChangedEvent; import org.eclipse.jface.viewers.TableViewer; import org.eclipse.jface.viewers.Viewer; import org.eclipse.jface.viewers.ViewerFilter; import org.eclipse.swt.SWT; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.events.SelectionListener; import org.eclipse.swt.graphics.Font; import org.eclipse.swt.layout.GridData; 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.dialogs.SelectionStatusDialog; import java.util.Set; public class ProjectSelectionDialog extends SelectionStatusDialog { // the visual selection widget group private TableViewer fTableViewer; private Set<DartProject> fProjectsWithSpecifics; // sizing constants private final static int SIZING_SELECTION_WIDGET_HEIGHT = 250; private final static int SIZING_SELECTION_WIDGET_WIDTH = 300; private final static String DIALOG_SETTINGS_SHOW_ALL = "ProjectSelectionDialog.show_all"; //$NON-NLS-1$ private ViewerFilter fFilter; public ProjectSelectionDialog(Shell parentShell, Set<DartProject> projectsWithSpecifics) { super(parentShell); setTitle(PreferencesMessages.ProjectSelectionDialog_title); setMessage(PreferencesMessages.ProjectSelectionDialog_desciption); fProjectsWithSpecifics = projectsWithSpecifics; fFilter = new ViewerFilter() { @Override public boolean select(Viewer viewer, Object parentElement, Object element) { return fProjectsWithSpecifics.contains(element); } }; } /* * (non-Javadoc) * * @see org.eclipse.ui.dialogs.SelectionStatusDialog#computeResult() */ @Override protected void computeResult() { } /* * (non-Javadoc) Method declared on Dialog. */ @Override protected Control createDialogArea(Composite parent) { // page group Composite composite = (Composite) super.createDialogArea(parent); Font font = parent.getFont(); composite.setFont(font); createMessageArea(composite); fTableViewer = new TableViewer(composite, SWT.H_SCROLL | SWT.V_SCROLL | SWT.BORDER); fTableViewer.addSelectionChangedListener(new ISelectionChangedListener() { @Override public void selectionChanged(SelectionChangedEvent event) { doSelectionChanged(((IStructuredSelection) event.getSelection()).toArray()); } }); fTableViewer.addDoubleClickListener(new IDoubleClickListener() { @Override public void doubleClick(DoubleClickEvent event) { okPressed(); } }); GridData data = new GridData(SWT.FILL, SWT.FILL, true, true); data.heightHint = SIZING_SELECTION_WIDGET_HEIGHT; data.widthHint = SIZING_SELECTION_WIDGET_WIDTH; fTableViewer.getTable().setLayoutData(data); fTableViewer.setLabelProvider(new DartElementLabelProvider()); fTableViewer.setContentProvider(new StandardDartElementContentProvider()); fTableViewer.setComparator(new DartElementComparator()); fTableViewer.getControl().setFont(font); Button checkbox = new Button(composite, SWT.CHECK); checkbox.setText(PreferencesMessages.ProjectSelectionDialog_filter); checkbox.setLayoutData(new GridData(SWT.BEGINNING, SWT.CENTER, true, false)); checkbox.addSelectionListener(new SelectionListener() { @Override public void widgetDefaultSelected(SelectionEvent e) { updateFilter(((Button) e.widget).getSelection()); } @Override public void widgetSelected(SelectionEvent e) { updateFilter(((Button) e.widget).getSelection()); } }); IDialogSettings dialogSettings = DartToolsPlugin.getDefault().getDialogSettings(); boolean doFilter = !dialogSettings.getBoolean(DIALOG_SETTINGS_SHOW_ALL) && !fProjectsWithSpecifics.isEmpty(); checkbox.setSelection(doFilter); updateFilter(doFilter); DartModel input = DartCore.create(ResourcesPlugin.getWorkspace().getRoot()); fTableViewer.setInput(input); doSelectionChanged(new Object[0]); Dialog.applyDialogFont(composite); return composite; } protected void updateFilter(boolean selected) { if (selected) { fTableViewer.addFilter(fFilter); } else { fTableViewer.removeFilter(fFilter); } DartToolsPlugin.getDefault().getDialogSettings().put(DIALOG_SETTINGS_SHOW_ALL, !selected); } private void doSelectionChanged(Object[] objects) { if (objects.length != 1) { updateStatus(new StatusInfo(IStatus.ERROR, "")); //$NON-NLS-1$ setSelectionResult(null); } else { updateStatus(new StatusInfo()); setSelectionResult(objects); } } }