| /******************************************************************************* |
| * Copyright (c) 2000, 2006 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 |
| *******************************************************************************/ |
| package org.eclipse.swt.snippets; |
| |
| /* |
| * Tree example snippet: show results as a bar chart in tree |
| * |
| * For a list of all SWT example snippets see |
| * http://www.eclipse.org/swt/snippets/ |
| * |
| * @since 3.2 |
| */ |
| |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.graphics.*; |
| import org.eclipse.swt.layout.*; |
| import org.eclipse.swt.widgets.*; |
| |
| public class Snippet232 { |
| |
| public static void main(String [] args) { |
| final Display display = new Display(); |
| Shell shell = new Shell(display); |
| shell.setLayout(new FillLayout()); |
| shell.setText("Show results as a bar chart in Tree"); |
| final Tree tree = new Tree(shell, SWT.BORDER); |
| tree.setHeaderVisible(true); |
| tree.setLinesVisible(true); |
| TreeColumn column1 = new TreeColumn(tree, SWT.NONE); |
| column1.setText("Bug Status"); |
| column1.setWidth(100); |
| final TreeColumn column2 = new TreeColumn(tree, SWT.NONE); |
| column2.setText("Percent"); |
| column2.setWidth(200); |
| String[] states = new String[]{"Resolved", "New", "Won't Fix", "Invalid"}; |
| String[] teams = new String[] {"UI", "SWT", "OSGI"}; |
| for (int i=0; i<teams.length; i++) { |
| TreeItem item = new TreeItem(tree, SWT.NONE); |
| item.setText(teams[i]); |
| for (int j = 0; j < states.length; j++) { |
| TreeItem subItem = new TreeItem(item, SWT.NONE); |
| subItem.setText(states[j]); |
| } |
| } |
| |
| /* |
| * NOTE: MeasureItem, PaintItem and EraseItem are called repeatedly. |
| * Therefore, it is critical for performance that these methods be |
| * as efficient as possible. |
| */ |
| tree.addListener(SWT.PaintItem, new Listener() { |
| int[] percents = new int[] {50, 30, 5, 15}; |
| public void handleEvent(Event event) { |
| if (event.index == 1) { |
| TreeItem item = (TreeItem)event.item; |
| TreeItem parent = item.getParentItem(); |
| if (parent != null) { |
| GC gc = event.gc; |
| int index = parent.indexOf(item); |
| int percent = percents[index]; |
| Color foreground = gc.getForeground(); |
| Color background = gc.getBackground(); |
| gc.setForeground(display.getSystemColor(SWT.COLOR_RED)); |
| gc.setBackground(display.getSystemColor(SWT.COLOR_YELLOW)); |
| int width = (column2.getWidth() - 1) * percent / 100; |
| gc.fillGradientRectangle(event.x, event.y, width, event.height, true); |
| Rectangle rect2 = new Rectangle(event.x, event.y, width-1, event.height-1); |
| gc.drawRectangle(rect2); |
| gc.setForeground(display.getSystemColor(SWT.COLOR_LIST_FOREGROUND)); |
| String text = percent+"%"; |
| Point size = event.gc.textExtent(text); |
| int offset = Math.max(0, (event.height - size.y) / 2); |
| gc.drawText(text, event.x+2, event.y+offset, true); |
| gc.setForeground(background); |
| gc.setBackground(foreground); |
| } |
| } |
| } |
| }); |
| |
| shell.pack(); |
| shell.open(); |
| while(!shell.isDisposed()) { |
| if(!display.readAndDispatch()) display.sleep(); |
| } |
| display.dispose(); |
| } |
| } |