Java Tutorial/SWT/Table Renderer

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();
  }
}

Draw a custom gradient selection

/*******************************************************************************
 * 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 custom gradient selection
 *
 * 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.Rectangle;
import org.eclipse.swt.graphics.Region;
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 GradientSelection {
  public static void main(String[] args) {
    final Display display = new Display();
    Shell shell = new Shell(display);
    shell.setText("Custom gradient selection for Table");
    shell.setLayout(new FillLayout());
    final Table table = new Table(shell, SWT.MULTI | SWT.FULL_SELECTION);
    table.setHeaderVisible(true);
    table.setLinesVisible(true);
    int columnCount = 3;
    for (int i = 0; i < columnCount; i++) {
      TableColumn column = new TableColumn(table, SWT.NONE);
      column.setText("Column " + i);
    }
    int itemCount = 8;
    for (int i = 0; i < itemCount; i++) {
      TableItem item = new TableItem(table, SWT.NONE);
      item.setText(new String[] { "item " + i + " a", "item " + i + " b", "item " + i + " c" });
    }
    /*
     * 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.EraseItem, new Listener() {
      public void handleEvent(Event event) {
        if ((event.detail & SWT.SELECTED) != 0) {
          GC gc = event.gc;
          Rectangle area = table.getClientArea();
          /*
           * If you wish to paint the selection beyond the end of last column,
           * you must change the clipping region.
           */
          int columnCount = table.getColumnCount();
          if (event.index == columnCount - 1 || columnCount == 0) {
            int width = area.x + area.width - event.x;
            if (width > 0) {
              Region region = new Region();
              gc.getClipping(region);
              region.add(event.x, event.y, width, event.height);
              gc.setClipping(region);
              region.dispose();
            }
          }
          gc.setAdvanced(true);
          if (gc.getAdvanced())
            gc.setAlpha(127);
          Rectangle rect = event.getBounds();
          Color foreground = gc.getForeground();
          Color background = gc.getBackground();
          gc.setForeground(display.getSystemColor(SWT.COLOR_RED));
          gc.setBackground(display.getSystemColor(SWT.COLOR_LIST_BACKGROUND));
          gc.fillGradientRectangle(0, rect.y, 500, rect.height, false);
          // restore colors for subsequent drawing
          gc.setForeground(foreground);
          gc.setBackground(background);
          event.detail &= ~SWT.SELECTED;
        }
      }
    });
    for (int i = 0; i < columnCount; i++) {
      table.getColumn(i).pack();
    }
    table.setSelection(table.getItem(0));
    shell.setSize(500, 200);
    shell.open();
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch())
        display.sleep();
    }
    display.dispose();
  }
}

Make text span multiple columns

/*******************************************************************************
 * 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 snippet: make text span multiple columns
 *
 * 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.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 TextSpanMultipleColumns {
  public static void main(String[] args) {
    final Display display = new Display();
    Shell shell = new Shell(display);
    shell.setText("Text spans two columns in a TableItem");
    shell.setLayout(new FillLayout());
    final Table table = new Table(shell, SWT.MULTI | SWT.FULL_SELECTION);
    table.setHeaderVisible(true);
    int columnCount = 4;
    for (int i = 0; i < columnCount; i++) {
      TableColumn column = new TableColumn(table, SWT.NONE);
      column.setText("Column " + i);
    }
    int itemCount = 8;
    for (int i = 0; i < itemCount; i++) {
      TableItem item = new TableItem(table, SWT.NONE);
      item.setText(0, "item " + i + " a");
      item.setText(3, "item " + i + " d");
    }
    /*
     * NOTE: MeasureItem, PaintItem and EraseItem are called repeatedly.
     * Therefore, it is critical for performance that these methods be as
     * efficient as possible.
     */
    final String string = "text that spans two columns";
    GC gc = new GC(table);
    final Point extent = gc.stringExtent(string);
    gc.dispose();
    final Color red = display.getSystemColor(SWT.COLOR_RED);
    Listener paintListener = new Listener() {
      public void handleEvent(Event event) {
        switch (event.type) {
        case SWT.MeasureItem: {
          if (event.index == 1 || event.index == 2) {
            event.width = extent.x / 2;
            event.height = Math.max(event.height, extent.y + 2);
          }
          break;
        }
        case SWT.PaintItem: {
          if (event.index == 1 || event.index == 2) {
            int offset = 0;
            if (event.index == 2) {
              TableColumn column1 = table.getColumn(1);
              offset = column1.getWidth();
            }
            event.gc.setForeground(red);
            int y = event.y + (event.height - extent.y) / 2;
            event.gc.drawString(string, event.x - offset, y);
          }
          break;
        }
        }
      }
    };
    table.addListener(SWT.MeasureItem, paintListener);
    table.addListener(SWT.PaintItem, paintListener);
    for (int i = 0; i < columnCount; i++) {
      table.getColumn(i).pack();
    }
    shell.pack();
    shell.open();
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch())
        display.sleep();
    }
    display.dispose();
  }
}

Place a progress bar in a table

/*******************************************************************************
 * Copyright (c) 2000, 2004 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;
/*
 * TableEditor example snippet: place a progress bar in a table
 *
 * For a list of all SWT example snippets see
 * http://www.eclipse.org/swt/snippets/
 */
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.TableEditor;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.ProgressBar;
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 TableProgressBarCell {
  public static void main(String[] args) {
    Display display = new Display();
    Shell shell = new Shell(display);
    shell.setLayout(new FillLayout());
    Table table = new Table(shell, SWT.BORDER);
    table.setHeaderVisible(true);
    table.setLinesVisible(true);
    for (int i = 0; i < 2; i++) {
      new TableColumn(table, SWT.NONE);
    }
    table.getColumn(0).setText("Task");
    table.getColumn(1).setText("Progress");
    for (int i = 0; i < 40; i++) {
      TableItem item = new TableItem(table, SWT.NONE);
      item.setText("Task " + i);
      if (i % 5 == 0) {
        ProgressBar bar = new ProgressBar(table, SWT.NONE);
        bar.setSelection(i);
        TableEditor editor = new TableEditor(table);
        editor.grabHorizontal = editor.grabVertical = true;
        editor.setEditor(bar, item, 1);
      }
    }
    table.getColumn(0).pack();
    table.getColumn(1).setWidth(128);
    shell.pack();
    shell.open();
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch()) {
        display.sleep();
      }
    }
    display.dispose();
  }
}