| /******************************************************************************* |
| * Copyright (c) 2007 IBM Corporation 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: |
| * IBM Corporation - initial API and implementation |
| * Michael Krkoska - initial API and implementation (bug 188333) |
| *******************************************************************************/ |
| package org.eclipse.jface.snippets.viewers; |
| |
| import java.io.File; |
| import java.text.MessageFormat; |
| |
| import org.eclipse.jface.viewers.ColumnViewer; |
| import org.eclipse.jface.viewers.IBaseLabelProvider; |
| import org.eclipse.jface.viewers.ILabelProvider; |
| import org.eclipse.jface.viewers.ITreeContentProvider; |
| import org.eclipse.jface.viewers.LabelProvider; |
| import org.eclipse.jface.viewers.SimpleStyledCellLabelProvider; |
| import org.eclipse.jface.viewers.TableViewer; |
| import org.eclipse.jface.viewers.Viewer; |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.custom.StyleRange; |
| import org.eclipse.swt.graphics.Color; |
| import org.eclipse.swt.graphics.Image; |
| 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.Display; |
| import org.eclipse.swt.widgets.Event; |
| import org.eclipse.swt.widgets.Label; |
| import org.eclipse.swt.widgets.Listener; |
| import org.eclipse.swt.widgets.Shell; |
| |
| /** |
| * Using a {@link SimpleStyledCellLabelProvider} on table viewer. Compare the result with a native table viewer. |
| */ |
| |
| public class Snippet050SimpleStyledCellLabelProvider { |
| |
| |
| private static final int SHELL_WIDTH= 640; |
| private static final Display DISPLAY= Display.getDefault(); |
| |
| |
| public static void main(String[] args) { |
| |
| Shell shell= new Shell(DISPLAY, SWT.CLOSE | SWT.RESIZE); |
| shell.setSize(SHELL_WIDTH, 300); |
| shell.setLayout(new GridLayout(1, false)); |
| |
| Snippet050SimpleStyledCellLabelProvider example= new Snippet050SimpleStyledCellLabelProvider(); |
| example.createPartControl(shell); |
| |
| shell.open(); |
| |
| while (!shell.isDisposed()) { |
| if (!DISPLAY.readAndDispatch()) { |
| DISPLAY.sleep(); |
| } |
| } |
| DISPLAY.dispose(); |
| } |
| |
| public Snippet050SimpleStyledCellLabelProvider() { |
| } |
| |
| public void createPartControl(Composite parent) { |
| Composite composite= new Composite(parent, SWT.NONE); |
| composite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 2, 1)); |
| composite.setLayout(new GridLayout(2, true)); |
| |
| ExampleLabelProvider labelProvider= new ExampleLabelProvider(); |
| |
| final ColumnViewer ownerDrawViewer= createViewer("Owner draw viewer:", composite, new DecoratingLabelProvider(labelProvider)); //$NON-NLS-1$ |
| |
| final ColumnViewer normalViewer= createViewer("Normal viewer:", composite, labelProvider); //$NON-NLS-1$ |
| |
| Button button= new Button(parent, SWT.NONE); |
| button.setText("Refresh Viewers"); //$NON-NLS-1$ |
| button.addListener(SWT.Modify, new Listener() { |
| |
| public void handleEvent(Event event) { |
| ownerDrawViewer.refresh(); |
| normalViewer.refresh(); |
| } |
| }); |
| |
| } |
| |
| private ColumnViewer createViewer(String description, Composite parent, IBaseLabelProvider labelProviders) { |
| |
| Composite composite= new Composite(parent, SWT.NONE); |
| composite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 1, 1)); |
| composite.setLayout(new GridLayout(1, true)); |
| |
| Label label= new Label(composite, SWT.NONE); |
| label.setLayoutData(new GridData(SWT.BEGINNING, SWT.CENTER, false, false)); |
| label.setText(description); |
| |
| TableViewer tableViewer= new TableViewer(composite, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL); |
| tableViewer.setContentProvider(new FileSystemContentProvider()); |
| tableViewer.setLabelProvider(labelProviders); |
| |
| GridData data= new GridData(GridData.FILL, GridData.FILL, true, true); |
| tableViewer.getControl().setLayoutData(data); |
| File[] roots = File.listRoots(); |
| File root = null; |
| for (int i = 0; i < roots.length; i++) { |
| String[] list = roots[i].list(); |
| if (list != null && list.length > 0) { |
| root = roots[i]; |
| break; |
| } |
| } |
| if (root == null) { |
| throw new RuntimeException("couldn't get a non-empty root file"); |
| } |
| tableViewer.setInput(root); |
| |
| return tableViewer; |
| } |
| |
| /** |
| * Implements a {@link SimpleStyledCellLabelProvider} that wraps a normal label |
| * provider and adds some decorations in color |
| */ |
| private static class DecoratingLabelProvider extends SimpleStyledCellLabelProvider { |
| |
| private static final StyleRange[] NO_RANGES= new StyleRange[0]; |
| private final ILabelProvider fWrappedLabelProvider; |
| |
| public DecoratingLabelProvider(ILabelProvider labelProvider) { |
| fWrappedLabelProvider= labelProvider; |
| } |
| |
| protected LabelPresentationInfo getLabelPresentationInfo(Object element) { |
| String text= fWrappedLabelProvider.getText(element); |
| Image image= fWrappedLabelProvider.getImage(element); |
| |
| |
| StyleRange[] ranges= NO_RANGES; |
| if (element instanceof File) { |
| File file= (File) element; |
| if (file.isFile()) { |
| String decoration= MessageFormat.format(" ({0} bytes)", new Object[] { new Long(file.length()) }); //$NON-NLS-1$ |
| |
| int decorationStart= text.length(); |
| int decorationLength= decoration.length(); |
| |
| text+= decoration; |
| |
| Color decorationColor= Display.getDefault().getSystemColor(SWT.COLOR_DARK_BLUE); |
| |
| StyleRange styleRange= new StyleRange(decorationStart, decorationLength, decorationColor, null); |
| ranges= new StyleRange[] { styleRange }; |
| } |
| } |
| return new LabelPresentationInfo(text, ranges, image, null, null, null); |
| } |
| |
| public void dispose() { |
| super.dispose(); |
| fWrappedLabelProvider.dispose(); |
| } |
| } |
| |
| |
| /** |
| * A simple label provider |
| */ |
| private static class ExampleLabelProvider extends LabelProvider { |
| |
| private static int IMAGE_SIZE= 16; |
| private static final Image IMAGE1= new Image(DISPLAY, DISPLAY.getSystemImage(SWT.ICON_WARNING).getImageData().scaledTo(IMAGE_SIZE, IMAGE_SIZE)); |
| private static final Image IMAGE2= new Image(DISPLAY, DISPLAY.getSystemImage(SWT.ICON_ERROR).getImageData().scaledTo(IMAGE_SIZE, IMAGE_SIZE)); |
| |
| public Image getImage(Object element) { |
| if (element instanceof File) { |
| File file= (File) element; |
| if (file.isDirectory()) { |
| return IMAGE1; |
| } else { |
| return IMAGE2; |
| } |
| } |
| return null; |
| } |
| |
| public String getText(Object element) { |
| if (element instanceof File) { |
| File file= (File) element; |
| return file.getName(); |
| } |
| return "null"; //$NON-NLS-1$ |
| } |
| |
| } |
| |
| private static class FileSystemContentProvider implements ITreeContentProvider { |
| |
| public Object[] getChildren(Object element) { |
| if (element instanceof File) { |
| File file= (File) element; |
| if (file.isDirectory()) { |
| File[] listFiles= file.listFiles(); |
| if (listFiles != null) { |
| return listFiles; |
| } |
| } |
| } |
| return new Object[0]; |
| } |
| |
| public Object getParent(Object element) { |
| if (element instanceof File) { |
| File file= (File) element; |
| return file.getParentFile(); |
| } |
| return null; |
| } |
| |
| public boolean hasChildren(Object element) { |
| return getChildren(element).length > 0; |
| } |
| |
| public Object[] getElements(Object inputElement) { |
| return getChildren(inputElement); |
| } |
| |
| public void dispose() { |
| } |
| |
| public void inputChanged(Viewer viewer, Object oldInput, Object newInput) { |
| } |
| } |
| |
| |
| |
| |
| } |