Java tutorial
/******************************************************************************* * Copyright (c) 2006-2011 Gluster, Inc. <http://www.gluster.com> * This file is part of Gluster Management Console. * * Gluster Management Console is free software; you can redistribute * it and/or modify it under the terms of the GNU General Public * License as published by the Free Software Foundation; either * version 3 of the License, or (at your option) any later version. * * Gluster Management Console 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 General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see * <http://www.gnu.org/licenses/>. *******************************************************************************/ package org.gluster.storage.management.console.views.pages; import java.util.List; import org.eclipse.jface.layout.TableColumnLayout; import org.eclipse.jface.viewers.CheckboxTableViewer; import org.eclipse.jface.viewers.IBaseLabelProvider; import org.eclipse.jface.viewers.IContentProvider; import org.eclipse.jface.viewers.IDoubleClickListener; import org.eclipse.jface.viewers.ISelection; import org.eclipse.jface.viewers.StructuredSelection; import org.eclipse.jface.viewers.TableViewer; import org.eclipse.jface.viewers.ViewerComparator; import org.eclipse.swt.SWT; import org.eclipse.swt.events.DisposeEvent; import org.eclipse.swt.events.DisposeListener; import org.eclipse.swt.events.PaintEvent; import org.eclipse.swt.events.PaintListener; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Table; import org.eclipse.swt.widgets.TableColumn; import org.eclipse.swt.widgets.Text; import org.eclipse.ui.ISelectionListener; import org.eclipse.ui.IWorkbenchPart; import org.eclipse.ui.IWorkbenchSite; import org.eclipse.ui.forms.events.HyperlinkAdapter; import org.eclipse.ui.forms.widgets.FormToolkit; import org.eclipse.ui.forms.widgets.Hyperlink; import org.gluster.storage.management.console.GlusterDataModelManager; import org.gluster.storage.management.console.utils.GUIHelper; import org.gluster.storage.management.console.utils.TableViewerComparator; import org.gluster.storage.management.core.model.ClusterListener; public abstract class AbstractTableViewerPage<T> extends Composite implements ISelectionListener { private boolean useCheckboxes; private boolean multiSelection; protected final FormToolkit toolkit = new FormToolkit(Display.getCurrent()); protected TableViewer tableViewer; protected GUIHelper guiHelper = GUIHelper.getInstance(); protected Composite parent; protected IWorkbenchSite site; private Hyperlink linkAll, linkNone; private ClusterListener clusterListener; public AbstractTableViewerPage(IWorkbenchSite site, final Composite parent, int style, boolean useChechboxes, boolean multiSelection, Object model) { super(parent, style); this.parent = parent; this.site = site; this.useCheckboxes = useChechboxes; this.multiSelection = multiSelection; toolkit.adapt(this); toolkit.paintBordersFor(this); setupPageLayout(); createCheckboxSelectionLinks(); Text filterText = guiHelper.createFilterText(toolkit, this); setupTableViewer(site, filterText); tableViewer.setInput(model); // register as selection provider so that other views can listen to any selection events on the tree site.setSelectionProvider(tableViewer); site.getPage().addSelectionListener(this); parent.layout(); // Important - this actually paints the table createListeners(parent); } public void createCheckboxSelectionLinks() { if (useCheckboxes) { // create the "select all/none" links toolkit.createLabel(this, "Select"); linkAll = toolkit.createHyperlink(this, "all", SWT.NONE); linkAll.addHyperlinkListener(new HyperlinkAdapter() { @Override public void linkActivated(org.eclipse.ui.forms.events.HyperlinkEvent e) { ((CheckboxTableViewer) tableViewer).setAllChecked(true); tableViewer.setSelection(new StructuredSelection(getAllEntities())); } }); toolkit.createLabel(this, " / "); linkNone = toolkit.createHyperlink(this, "none", SWT.NONE); linkNone.addHyperlinkListener(new HyperlinkAdapter() { @Override public void linkActivated(org.eclipse.ui.forms.events.HyperlinkEvent e) { ((CheckboxTableViewer) tableViewer).setAllChecked(false); tableViewer.setSelection(StructuredSelection.EMPTY); } }); } else { // create dummy labels to maintain layout toolkit.createLabel(this, ""); toolkit.createLabel(this, ""); toolkit.createLabel(this, ""); toolkit.createLabel(this, ""); } } private void createListeners(final Composite parent) { /** * Ideally not required. However the table viewer is not getting laid out properly on performing * "maximize + restore" So this is a hack to make sure that the table is laid out again on re-size of the window */ addPaintListener(new PaintListener() { @Override public void paintControl(PaintEvent e) { parent.layout(); } }); clusterListener = createClusterListener(); GlusterDataModelManager.getInstance().addClusterListener(clusterListener); addDisposeListener(new DisposeListener() { @Override public void widgetDisposed(DisposeEvent e) { toolkit.dispose(); GlusterDataModelManager.getInstance().removeClusterListener(clusterListener); } }); } protected abstract ClusterListener createClusterListener(); protected abstract String[] getColumnNames(); protected abstract void setColumnProperties(Table table); protected abstract IBaseLabelProvider getLabelProvider(); protected abstract IContentProvider getContentProvider(); protected abstract List<T> getAllEntities(); public void addDoubleClickListener(IDoubleClickListener listener) { tableViewer.addDoubleClickListener(listener); } private void setupPageLayout() { final GridLayout layout = new GridLayout(5, false); layout.verticalSpacing = 10; layout.marginTop = 10; setLayout(layout); } protected void setupTable(Composite parent, Table table) { table.setHeaderVisible(true); table.setLinesVisible(false); TableColumnLayout tableColumnLayout = guiHelper.createTableColumnLayout(table, getColumnNames()); parent.setLayout(tableColumnLayout); setColumnProperties(table); } private void createTableViewer(Composite parent) { int style = SWT.FLAT | SWT.FULL_SELECTION; style |= (multiSelection ? SWT.MULTI : SWT.SINGLE); if (useCheckboxes) { tableViewer = CheckboxTableViewer.newCheckList(parent, style); } else { tableViewer = new TableViewer(parent, style); } tableViewer.setLabelProvider(getLabelProvider()); tableViewer.setContentProvider(getContentProvider()); setupTable(parent, tableViewer.getTable()); } private Composite createTableViewerComposite() { Composite tableViewerComposite = new Composite(this, SWT.NO); tableViewerComposite.setLayout(new FillLayout(SWT.HORIZONTAL)); tableViewerComposite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true)); GridData layoutData = new GridData(); layoutData.horizontalSpan = 5; layoutData.grabExcessHorizontalSpace = true; layoutData.horizontalAlignment = SWT.FILL; layoutData.verticalAlignment = SWT.FILL; layoutData.grabExcessVerticalSpace = true; tableViewerComposite.setLayoutData(layoutData); return tableViewerComposite; } private void setupTableViewer(IWorkbenchSite site, final Text filterText) { Composite tableViewerComposite = createTableViewerComposite(); createTableViewer(tableViewerComposite); site.setSelectionProvider(tableViewer); if (useCheckboxes) { // make sure that table selection is driven by checkbox selection guiHelper.configureCheckboxTableViewer((CheckboxTableViewer) tableViewer); } // Create a case insensitive filter for the table viewer using the filter text field guiHelper.createFilter(tableViewer, filterText, false); tableViewer.setComparator(createViewerComparator()); for (int columnIndex = 0; columnIndex < tableViewer.getTable().getColumnCount(); columnIndex++) { TableColumn column = tableViewer.getTable().getColumn(columnIndex); column.addSelectionListener(getColumnSelectionAdapter(column, columnIndex)); } } private SelectionAdapter getColumnSelectionAdapter(final TableColumn column, final int columnIndex) { return new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { ViewerComparator viewerComparator = tableViewer.getComparator(); if (viewerComparator instanceof TableViewerComparator) { TableViewerComparator comparator = (TableViewerComparator) viewerComparator; comparator.setColumn(columnIndex); tableViewer.getTable().setSortDirection(comparator.getDirection()); tableViewer.getTable().setSortColumn(column); tableViewer.refresh(); } } }; } protected abstract ViewerComparator createViewerComparator(); /* (non-Javadoc) * @see org.eclipse.ui.ISelectionListener#selectionChanged(org.eclipse.ui.IWorkbenchPart, org.eclipse.jface.viewers.ISelection) */ @Override public void selectionChanged(IWorkbenchPart part, ISelection selection) { } }