Java tutorial
/*=============================================================================# # Copyright (c) 2005-2015 Stephan Wahlbrink (WalWare.de) and others. # 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 # # Contributors: # Stephan Wahlbrink - initial API and implementation #=============================================================================*/ package de.walware.ecommons.preferences.ui; import java.util.Set; import org.eclipse.core.resources.IProject; 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.IStructuredContentProvider; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.viewers.LabelProvider; import org.eclipse.jface.viewers.SelectionChangedEvent; import org.eclipse.jface.viewers.TableViewer; import org.eclipse.jface.viewers.Viewer; import org.eclipse.jface.viewers.ViewerComparator; 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.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 de.walware.ecommons.preferences.internal.ui.Messages; import de.walware.ecommons.ui.components.StatusInfo; import de.walware.ecommons.ui.internal.UIMiscellanyPlugin; public class ProjectSelectionDialog extends SelectionStatusDialog { private static class ContentProvider implements IStructuredContentProvider { @Override public Object[] getElements(final Object inputElement) { return ((Set) inputElement).toArray(); } @Override public void inputChanged(final Viewer viewer, final Object oldInput, final Object newInput) { } @Override public void dispose() { } } private static class ProjectLabelProvider extends LabelProvider { @Override public String getText(final Object element) { if (element instanceof IProject) { return ((IProject) element).getName(); } return super.getText(element); } } private static class ProjectComparator extends ViewerComparator { @SuppressWarnings("unchecked") @Override public int compare(final Viewer viewer, final Object e1, final Object e2) { return getComparator().compare(((IProject) e1).getName(), ((IProject) e2).getName()); } } private Set<IProject> fAllItems; private Set<IProject> fFilteredItems; // the visual selection widget group private TableViewer fTableViewer; // sizing constants private final static int SIZING_SELECTION_WIDGET_HEIGHT = 250; private final static int SIZING_SELECTION_WIDGET_WIDTH = 300; private ViewerFilter fFilter; private final static String DIALOG_SETTINGS_SHOW_ALL = "ProjectSelectionDialog.show_all"; //$NON-NLS-1$ public ProjectSelectionDialog(final Shell parentShell, final Set<IProject> all, final Set<IProject> filtered) { super(parentShell); setTitle(Messages.ProjectSelectionDialog_title); setMessage(Messages.ProjectSelectionDialog_desciption); fAllItems = all; fFilteredItems = filtered; fFilter = new ViewerFilter() { @Override public boolean select(final Viewer viewer, final Object parentElement, final Object element) { for (final Object object : fFilteredItems) { if (element == object) { return true; } } return false; } }; } @Override protected Control createDialogArea(final Composite parent) { // page group final Composite composite = (Composite) super.createDialogArea(parent); createMessageArea(composite); fTableViewer = new TableViewer(composite, SWT.H_SCROLL | SWT.V_SCROLL | SWT.BORDER); fTableViewer.addSelectionChangedListener(new ISelectionChangedListener() { @Override public void selectionChanged(final SelectionChangedEvent event) { doSelectionChanged(((IStructuredSelection) event.getSelection()).toArray()); } }); fTableViewer.addDoubleClickListener(new IDoubleClickListener() { @Override public void doubleClick(final DoubleClickEvent event) { okPressed(); } }); final 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.setContentProvider(new ContentProvider()); fTableViewer.setLabelProvider(new ProjectLabelProvider()); fTableViewer.setComparator((new ProjectComparator())); final Button checkbox = new Button(composite, SWT.CHECK); checkbox.setText(Messages.ProjectSelectionDialog_filter); checkbox.setLayoutData(new GridData(SWT.BEGINNING, SWT.CENTER, true, false)); checkbox.addSelectionListener(new SelectionListener() { @Override public void widgetSelected(final SelectionEvent e) { updateFilter(((Button) e.widget).getSelection()); } @Override public void widgetDefaultSelected(final SelectionEvent e) { updateFilter(((Button) e.widget).getSelection()); } }); final IDialogSettings dialogSettings = UIMiscellanyPlugin.getDefault().getDialogSettings(); final boolean doFilter = !dialogSettings.getBoolean(DIALOG_SETTINGS_SHOW_ALL) && !fFilteredItems.isEmpty(); checkbox.setSelection(doFilter); updateFilter(doFilter); fTableViewer.setInput(fAllItems); doSelectionChanged(new Object[0]); Dialog.applyDialogFont(composite); return composite; } protected void updateFilter(final boolean selected) { if (selected) { fTableViewer.addFilter(fFilter); } else { fTableViewer.removeFilter(fFilter); } UIMiscellanyPlugin.getDefault().getDialogSettings().put(DIALOG_SETTINGS_SHOW_ALL, !selected); } private void doSelectionChanged(final Object[] objects) { if (objects.length != 1) { updateStatus(new StatusInfo(IStatus.ERROR, "")); //$NON-NLS-1$ setSelectionResult(null); } else { updateStatus(new StatusInfo()); setSelectionResult(objects); } } @Override protected void computeResult() { } }