| /******************************************************************************* |
| * Copyright (c) 2007 Tom Schindl 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: |
| * Tom Schindl - initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.jface.snippets.viewers; |
| |
| import org.eclipse.jface.viewers.ColumnLabelProvider; |
| import org.eclipse.jface.viewers.IStructuredContentProvider; |
| import org.eclipse.jface.viewers.TableViewer; |
| import org.eclipse.jface.viewers.TableViewerColumn; |
| import org.eclipse.jface.viewers.Viewer; |
| import org.eclipse.jface.viewers.ViewerCell; |
| import org.eclipse.jface.viewers.ViewerFilter; |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.events.SelectionAdapter; |
| import org.eclipse.swt.events.SelectionEvent; |
| import org.eclipse.swt.graphics.Color; |
| import org.eclipse.swt.layout.FillLayout; |
| import org.eclipse.swt.widgets.Button; |
| import org.eclipse.swt.widgets.Display; |
| import org.eclipse.swt.widgets.Shell; |
| import org.eclipse.swt.widgets.TableItem; |
| |
| /** |
| * Demonstrate alternating row colors using new Jace 3.3 API |
| * |
| * @author Tom Schindl <tom.schindl@bestsolution.at> |
| * |
| */ |
| public class Snippet041TableViewerAlternatingColors { |
| |
| private class MyContentProvider implements IStructuredContentProvider { |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.jface.viewers.IStructuredContentProvider#getElements(java.lang.Object) |
| */ |
| public Object[] getElements(Object inputElement) { |
| return (MyModel[]) inputElement; |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.jface.viewers.IContentProvider#dispose() |
| */ |
| public void dispose() { |
| |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.jface.viewers.IContentProvider#inputChanged(org.eclipse.jface.viewers.Viewer, |
| * java.lang.Object, java.lang.Object) |
| */ |
| public void inputChanged(Viewer viewer, Object oldInput, Object newInput) { |
| } |
| |
| } |
| |
| public class MyModel { |
| public int counter; |
| |
| public MyModel(int counter) { |
| this.counter = counter; |
| } |
| |
| public String toString() { |
| return "Item " + this.counter; |
| } |
| } |
| |
| private class OptimizedIndexSearcher { |
| private int lastIndex = 0; |
| |
| public boolean isEven(TableItem item) { |
| TableItem[] items = item.getParent().getItems(); |
| |
| // 1. Search the next ten items |
| for( int i = lastIndex; i < items.length && lastIndex + 10 > i; i++ ) { |
| if( items[i] == item ) { |
| lastIndex = i; |
| return lastIndex % 2 == 0; |
| } |
| } |
| |
| // 2. Search the previous ten items |
| for( int i = lastIndex; i < items.length && lastIndex - 10 > i; i-- ) { |
| if( items[i] == item ) { |
| lastIndex = i; |
| return lastIndex % 2 == 0; |
| } |
| } |
| |
| // 3. Start from the beginning |
| for( int i = 0; i < items.length; i++ ) { |
| if( items[i] == item ) { |
| lastIndex = i; |
| return lastIndex % 2 == 0; |
| } |
| } |
| |
| return false; |
| } |
| } |
| |
| public Snippet041TableViewerAlternatingColors(Shell shell) { |
| final TableViewer v = new TableViewer(shell, SWT.BORDER |
| | SWT.FULL_SELECTION|SWT.VIRTUAL); |
| v.setContentProvider(new MyContentProvider()); |
| |
| final OptimizedIndexSearcher searcher = new OptimizedIndexSearcher(); |
| |
| TableViewerColumn column = new TableViewerColumn(v, SWT.NONE); |
| column.getColumn().setWidth(200); |
| column.getColumn().setText("Column 1"); |
| column.setLabelProvider(new ColumnLabelProvider() { |
| boolean even = true; |
| |
| public Color getBackground(Object element) { |
| if( even ) { |
| return null; |
| } else { |
| return v.getTable().getDisplay().getSystemColor(SWT.COLOR_GRAY); |
| } |
| } |
| |
| public void update(ViewerCell cell) { |
| even = searcher.isEven((TableItem)cell.getItem()); |
| super.update(cell); |
| } |
| }); |
| |
| column = new TableViewerColumn(v, SWT.NONE); |
| column.getColumn().setWidth(200); |
| column.getColumn().setText("Column 2"); |
| column.setLabelProvider(new ColumnLabelProvider() { |
| boolean even = true; |
| |
| public Color getBackground(Object element) { |
| if( even ) { |
| return null; |
| } else { |
| return v.getTable().getDisplay().getSystemColor(SWT.COLOR_GRAY); |
| } |
| } |
| |
| public void update(ViewerCell cell) { |
| even = searcher.isEven((TableItem)cell.getItem()); |
| super.update(cell); |
| } |
| |
| }); |
| |
| MyModel[] model = createModel(); |
| v.setInput(model); |
| v.getTable().setLinesVisible(true); |
| v.getTable().setHeaderVisible(true); |
| |
| final ViewerFilter filter = new ViewerFilter() { |
| |
| public boolean select(Viewer viewer, Object parentElement, |
| Object element) { |
| return ((MyModel)element).counter % 2 == 0; |
| } |
| |
| }; |
| |
| Button b = new Button(shell,SWT.PUSH); |
| b.addSelectionListener(new SelectionAdapter() { |
| boolean b = true; |
| |
| public void widgetSelected(SelectionEvent e) { |
| if( b ) { |
| v.setFilters(new ViewerFilter[] {filter}); |
| b = false; |
| } else { |
| v.setFilters(new ViewerFilter[0]); |
| b = true; |
| } |
| } |
| |
| }); |
| } |
| |
| private MyModel[] createModel() { |
| MyModel[] elements = new MyModel[100000]; |
| |
| for (int i = 0; i < 100000; i++) { |
| elements[i] = new MyModel(i); |
| } |
| |
| return elements; |
| } |
| |
| /** |
| * @param args |
| */ |
| public static void main(String[] args) { |
| Display display = new Display(); |
| |
| Shell shell = new Shell(display); |
| shell.setLayout(new FillLayout()); |
| new Snippet041TableViewerAlternatingColors(shell); |
| shell.open(); |
| |
| while (!shell.isDisposed()) { |
| if (!display.readAndDispatch()) |
| display.sleep(); |
| } |
| |
| display.dispose(); |
| |
| } |
| |
| } |