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The source code/******************************************************************************* * Copyright (c) 2006 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.OwnerDrawLabelProvider; import org.eclipse.jface.viewers.TableViewer; import org.eclipse.jface.viewers.TableViewerColumn; import org.eclipse.jface.viewers.Viewer; import org.eclipse.swt.SWT; import org.eclipse.swt.graphics.Color; import org.eclipse.swt.graphics.GC; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.graphics.Rectangle; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Event; import org.eclipse.swt.widgets.Shell; import org.eclipse.swt.widgets.TableItem; /** * Example showing how to center an image using an owner draw label provider * * @author Tom Schindl <tom.schindl@bestsolution.at> * */ public class Snippet051TableCenteredImage { private static Image[] images; 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) { } } private abstract class CenterImageLabelProvider extends OwnerDrawLabelProvider { protected void measure(Event event, Object element) { } protected void paint(Event event, Object element) { Image img = getImage(element); if (img != null) { Rectangle bounds = ((TableItem) event.item) .getBounds(event.index); Rectangle imgBounds = img.getBounds(); bounds.width /= 2; bounds.width -= imgBounds.width / 2; bounds.height /= 2; bounds.height -= imgBounds.height / 2; int x = bounds.width > 0 ? bounds.x + bounds.width : bounds.x; int y = bounds.height > 0 ? bounds.y + bounds.height : bounds.y; event.gc.drawImage(img, x, y); } } protected abstract Image getImage(Object element); } public class MyModel { public int counter; public MyModel(int counter) { this.counter = counter; } public String toString() { return "Item " + this.counter; } } private static Image createImage(Display display, int red, int green, int blue) { Color color = new Color(display, red, green, blue); Image image = new Image(display, 10, 10); GC gc = new GC(image); gc.setBackground(color); gc.fillRectangle(0, 0, 10, 10); gc.dispose(); return image; } public Snippet051TableCenteredImage(Shell shell) { final TableViewer v = new TableViewer(shell, SWT.BORDER | SWT.FULL_SELECTION); v.setContentProvider(new MyContentProvider()); TableViewerColumn column = new TableViewerColumn(v, SWT.NONE); column.getColumn().setWidth(200); column.getColumn().setText("Column 1"); column.setLabelProvider(new ColumnLabelProvider() { public String getText(Object element) { return "Column 1 => " + element.toString(); } }); column = new TableViewerColumn(v, SWT.NONE); column.getColumn().setWidth(200); column.getColumn().setText("Column 2"); column.setLabelProvider(new CenterImageLabelProvider() { protected Image getImage(Object element) { return images[((MyModel) element).counter % 4]; } }); // OwnerDrawLabelProvider.setUpOwnerDraw(v); MyModel[] model = createModel(); v.setInput(model); v.getTable().setLinesVisible(true); v.getTable().setHeaderVisible(true); } private MyModel[] createModel() { MyModel[] elements = new MyModel[10]; for (int i = 0; i < 10; i++) { elements[i] = new MyModel(i); } return elements; } /** * @param args */ public static void main(String[] args) { Display display = new Display(); images = new Image[4]; images[0] = createImage(display, 0, 0, 255); images[1] = createImage(display, 0, 255, 255); images[2] = createImage(display, 0, 255, 0); images[3] = createImage(display, 255, 0, 255); Shell shell = new Shell(display); shell.setLayout(new FillLayout()); new Snippet051TableCenteredImage(shell); shell.open(); while (!shell.isDisposed()) { if (!display.readAndDispatch()) display.sleep(); } for (int i = 0; i < images.length; i++) { images[i].dispose(); } display.dispose(); } } |
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