Add ProgressBar to table cell (Column) : Table Renderer « SWT « Java Tutorial





Add ProgressBar to table cell (Column)
/*******************************************************************************
 * 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;
/* 
 * Table example snippet: Draw a bar graph
 *
 * For a list of all SWT example snippets see
 * http://www.eclipse.org/swt/snippets/
 * 
 * @since 3.2
 */

import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Point;
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.Listener;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableColumn;
import org.eclipse.swt.widgets.TableItem;

public class TableCellProgressBar {

  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 Table");
    final Table table = new Table(shell, SWT.BORDER);
    table.setHeaderVisible(true);
    table.setLinesVisible(true);
    TableColumn column1 = new TableColumn(table, SWT.NONE);
    column1.setText("Bug Status");
    column1.setWidth(100);
    final TableColumn column2 = new TableColumn(table, SWT.NONE);
    column2.setText("Percent");
    column2.setWidth(200);
    String[] labels = new String[] { "Resolved", "New", "Won't Fix", "Invalid" };
    for (int i = 0; i < labels.length; i++) {
      TableItem item = new TableItem(table, SWT.NONE);
      item.setText(labels[i]);
    }

    /*
     * NOTE: MeasureItem, PaintItem and EraseItem are called repeatedly.
     * Therefore, it is critical for performance that these methods be as
     * efficient as possible.
     */
    table.addListener(SWT.PaintItem, new Listener() {
      int[] percents = new int[] { 50, 30, 5, 15 };

      public void handleEvent(Event event) {
        if (event.index == 1) {
          GC gc = event.gc;
          TableItem item = (TableItem) event.item;
          int index = table.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();
  }
}










17.55.Table Renderer
17.55.1.Make text span multiple columnsMake text span multiple columns
17.55.2.Place a progress bar in a tablePlace a progress bar in a table
17.55.3.Draw a custom gradient selectionDraw a custom gradient selection
17.55.4.Add ProgressBar to table cell (Column)Add ProgressBar to table cell (Column)