Java Tutorial/SWT/Table Event

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Add Default Table Selection Listener and Get the Selected TableItem

import org.eclipse.swt.SWT;
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.TableItem;
public class TableDefaultSelectionListener {
  public static void main(String[] args) {
    Display display = new Display();
    Shell shell = new Shell(display);
    final Table table = new Table(shell, SWT.BORDER | SWT.MULTI | SWT.V_SCROLL);
    for (int i = 0; i < 16; i++) {
      TableItem item = new TableItem(table, 0);
      item.setText("Item " + i);
    }
    table.setBounds(0, 0, 100, 100);
    table.addListener(SWT.DefaultSelection, new Listener() {
      public void handleEvent(Event e) {
        String string = "";
        TableItem[] selection = table.getSelection();
        for (int i = 0; i < selection.length; i++)
          string += selection[i] + " ";
        System.out.println("DefaultSelection={" + string + "}");
      }
    });
    shell.pack();
    shell.open();
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch())
        display.sleep();
    }
    display.dispose();
  }
}





Add Table Selection Listener and Get Selected TableItem

import org.eclipse.swt.SWT;
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.TableItem;
public class TableSelectionListenerSelectedTableItem {
  public static void main(String[] args) {
    Display display = new Display();
    Shell shell = new Shell(display);
    final Table table = new Table(shell, SWT.BORDER | SWT.MULTI | SWT.V_SCROLL);
    for (int i = 0; i < 16; i++) {
      TableItem item = new TableItem(table, 0);
      item.setText("Item " + i);
    }
    table.setBounds(0, 0, 100, 100);
    table.addListener(SWT.Selection, new Listener() {
      public void handleEvent(Event e) {
        String string = "";
        TableItem[] selection = table.getSelection();
        for (int i = 0; i < selection.length; i++)
          string += selection[i] + " ";
        System.out.println("Selection={" + string + "}");
      }
    });
    shell.pack();
    shell.open();
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch())
        display.sleep();
    }
    display.dispose();
  }
}





Find a table cell from mouse down (works for any table style)

/*******************************************************************************
 * 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;
/*
 * Table example snippet: find a table cell from mouse down (works for any table style)
 *
 * For a list of all SWT example snippets see
 * http://www.eclipse.org/swt/snippets/
 */
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
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 TableCellUnderMouse {
  public static void main(String[] args) {
    Display display = new Display();
    Shell shell = new Shell(display);
    final Table table = new Table(shell, SWT.BORDER | SWT.V_SCROLL);
    table.setHeaderVisible(true);
    table.setLinesVisible(true);
    final int rowCount = 64, columnCount = 4;
    for (int i = 0; i < columnCount; i++) {
      TableColumn column = new TableColumn(table, SWT.NONE);
      column.setText("Column " + i);
    }
    for (int i = 0; i < rowCount; i++) {
      TableItem item = new TableItem(table, SWT.NONE);
      for (int j = 0; j < columnCount; j++) {
        item.setText(j, "Item " + i + "-" + j);
      }
    }
    for (int i = 0; i < columnCount; i++) {
      table.getColumn(i).pack();
    }
    Point size = table.ruputeSize(SWT.DEFAULT, 200);
    table.setSize(size);
    shell.pack();
    table.addListener(SWT.MouseDown, new Listener() {
      public void handleEvent(Event event) {
        Rectangle clientArea = table.getClientArea();
        Point pt = new Point(event.x, event.y);
        int index = table.getTopIndex();
        while (index < table.getItemCount()) {
          boolean visible = false;
          TableItem item = table.getItem(index);
          for (int i = 0; i < columnCount; i++) {
            Rectangle rect = item.getBounds(i);
            if (rect.contains(pt)) {
              System.out.println("Item " + index + "-" + i);
            }
            if (!visible && rect.intersects(clientArea)) {
              visible = true;
            }
          }
          if (!visible)
            return;
          index++;
        }
      }
    });
    shell.open();
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch())
        display.sleep();
    }
    display.dispose();
  }
}





Get TableItem from Mouse position

/*******************************************************************************
 * 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;
/*
 * Table example snippet: find a table cell from mouse down (SWT.FULL_SELECTION)
 *
 * For a list of all SWT example snippets see
 * http://www.eclipse.org/swt/snippets/
 */
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
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 TableItemMouse {
  public static void main(String[] args) {
    Display display = new Display();
    Shell shell = new Shell(display);
    final Table table = new Table(shell, SWT.BORDER | SWT.V_SCROLL | SWT.FULL_SELECTION);
    table.setHeaderVisible(true);
    table.setLinesVisible(true);
    final int rowCount = 64, columnCount = 4;
    for (int i = 0; i < columnCount; i++) {
      TableColumn column = new TableColumn(table, SWT.NONE);
      column.setText("Column " + i);
    }
    for (int i = 0; i < rowCount; i++) {
      TableItem item = new TableItem(table, SWT.NONE);
      for (int j = 0; j < columnCount; j++) {
        item.setText(j, "Item " + i + "-" + j);
      }
    }
    for (int i = 0; i < columnCount; i++) {
      table.getColumn(i).pack();
    }
    Point size = table.ruputeSize(SWT.DEFAULT, 200);
    table.setSize(size);
    shell.pack();
    table.addListener(SWT.MouseDown, new Listener() {
      public void handleEvent(Event event) {
        Point pt = new Point(event.x, event.y);
        TableItem item = table.getItem(pt);
        if (item == null)
          return;
        for (int i = 0; i < columnCount; i++) {
          Rectangle rect = item.getBounds(i);
          if (rect.contains(pt)) {
            int index = table.indexOf(item);
            System.out.println("Item " + index + "-" + i);
          }
        }
      }
    });
    shell.open();
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch())
        display.sleep();
    }
    display.dispose();
  }
}





TableColumn Move Listener

/*******************************************************************************
 * Copyright (c) 2000, 2005 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;
/*
 * Allow user to reorder columns and reorder columns programmatically.
 * 
 * For a list of all SWT example snippets see
 * http://www.eclipse.org/swt/snippets/
 * 
 * @since 3.1
 */
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.RowData;
import org.eclipse.swt.layout.RowLayout;
import org.eclipse.swt.widgets.Button;
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 TableColumnMoveListener {
  public static void main(String[] args) {
    Display display = new Display();
    Shell shell = new Shell(display);
    shell.setLayout(new RowLayout(SWT.HORIZONTAL));
    final Table table = new Table(shell, SWT.BORDER | SWT.CHECK);
    table.setLayoutData(new RowData(-1, 300));
    table.setHeaderVisible(true);
    TableColumn column = new TableColumn(table, SWT.LEFT);
    column.setText("Column 0");
    column = new TableColumn(table, SWT.CENTER);
    column.setText("Column 1");
    column = new TableColumn(table, SWT.CENTER);
    column.setText("Column 2");
    column = new TableColumn(table, SWT.CENTER);
    column.setText("Column 3");
    column = new TableColumn(table, SWT.CENTER);
    column.setText("Column 4");
    for (int i = 0; i < 100; i++) {
      TableItem item = new TableItem(table, SWT.NONE);
      String[] text = new String[] { i + " 0", i + " 1", i + " 2", i + " 3", i + " 4" };
      item.setText(text);
    }
    Listener listener = new Listener() {
      public void handleEvent(Event e) {
        System.out.println("Move " + e.widget);
      }
    };
    TableColumn[] columns = table.getColumns();
    for (int i = 0; i < columns.length; i++) {
      columns[i].pack();
      columns[i].setMoveable(true);
      columns[i].addListener(SWT.Move, listener);
    }
    shell.pack();
    shell.open();
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch())
        display.sleep();
    }
    display.dispose();
  }
}





Table events: MeasureItem, PaintItem and EraseItem

/*******************************************************************************
 * 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;
/* 
 * example snippet: Multiple lines per TableItem
 *
 * 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.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 TableEventMeasureItemPaintItemEraseItem {
  public static void main(String[] args) {
    Display display = new Display();
    Shell shell = new Shell(display);
    shell.setText("Multiple lines in a TableItem");
    shell.setLayout(new FillLayout());
    final Table table = new Table(shell, SWT.MULTI | SWT.FULL_SELECTION);
    table.setHeaderVisible(true);
    table.setLinesVisible(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(new String[] { "item " + i + " a", "item " + i + " b", "item " + i + " c",
          "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.
     */
    Listener paintListener = new Listener() {
      public void handleEvent(Event event) {
        switch (event.type) {
        case SWT.MeasureItem: {
          TableItem item = (TableItem) event.item;
          String text = getText(item, event.index);
          Point size = event.gc.textExtent(text);
          event.width = size.x;
          event.height = Math.max(event.height, size.y);
          break;
        }
        case SWT.PaintItem: {
          TableItem item = (TableItem) event.item;
          String text = getText(item, event.index);
          Point size = event.gc.textExtent(text);
          int offset2 = event.index == 0 ? Math.max(0, (event.height - size.y) / 2) : 0;
          event.gc.drawText(text, event.x, event.y + offset2, true);
          break;
        }
        case SWT.EraseItem: {
          event.detail &= ~SWT.FOREGROUND;
          break;
        }
        }
      }
      String getText(TableItem item, int column) {
        String text = item.getText(column);
        if (column != 0) {
          int index = table.indexOf(item);
          if ((index + column) % 3 == 1) {
            text += "\nnew line";
          }
          if ((index + column) % 3 == 2) {
            text += "\nnew line\nnew line";
          }
        }
        return text;
      }
    };
    table.addListener(SWT.MeasureItem, paintListener);
    table.addListener(SWT.PaintItem, paintListener);
    table.addListener(SWT.EraseItem, 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();
  }
}





Table measure item listener

/*******************************************************************************
 * 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: Images on the right hand side of a TableItem
 *
 * 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.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.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 TableMeasureItemListener {
  public static void main(String[] args) {
    Display display = new Display();
    final Image image = display.getSystemImage(SWT.ICON_INFORMATION);
    Shell shell = new Shell(display);
    shell.setText("Images on the right side of the TableItem");
    shell.setLayout(new FillLayout());
    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.
     */
    Listener paintListener = new Listener() {
      public void handleEvent(Event event) {
        switch (event.type) {
        case SWT.MeasureItem: {
          Rectangle rect = image.getBounds();
          event.width += rect.width;
          event.height = Math.max(event.height, rect.height + 2);
          break;
        }
        case SWT.PaintItem: {
          int x = event.x + event.width;
          Rectangle rect = image.getBounds();
          int offset = Math.max(0, (event.height - rect.height) / 2);
          event.gc.drawImage(image, x, event.y + offset);
          break;
        }
        }
      }
    };
    table.addListener(SWT.MeasureItem, paintListener);
    table.addListener(SWT.PaintItem, paintListener);
    for (int i = 0; i < columnCount; i++) {
      table.getColumn(i).pack();
    }
    shell.setSize(500, 200);
    shell.open();
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch())
        display.sleep();
    }
    if (image != null)
      image.dispose();
    display.dispose();
  }
}





Table paint item listener

/*******************************************************************************
 * 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: Images on the right hand side of a TableItem
 *
 * 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.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.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 TablePaintItemListener {
  public static void main(String[] args) {
    Display display = new Display();
    final Image image = display.getSystemImage(SWT.ICON_INFORMATION);
    Shell shell = new Shell(display);
    shell.setText("Images on the right side of the TableItem");
    shell.setLayout(new FillLayout());
    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.
     */
    Listener paintListener = new Listener() {
      public void handleEvent(Event event) {
        switch (event.type) {
        case SWT.MeasureItem: {
          Rectangle rect = image.getBounds();
          event.width += rect.width;
          event.height = Math.max(event.height, rect.height + 2);
          break;
        }
        case SWT.PaintItem: {
          int x = event.x + event.width;
          Rectangle rect = image.getBounds();
          int offset = Math.max(0, (event.height - rect.height) / 2);
          event.gc.drawImage(image, x, event.y + offset);
          break;
        }
        }
      }
    };
    table.addListener(SWT.MeasureItem, paintListener);
    table.addListener(SWT.PaintItem, paintListener);
    for (int i = 0; i < columnCount; i++) {
      table.getColumn(i).pack();
    }
    shell.setSize(500, 200);
    shell.open();
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch())
        display.sleep();
    }
    if (image != null)
      image.dispose();
    display.dispose();
  }
}





Table Selection Event

import org.eclipse.swt.SWT;
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.TableItem;
public class TableSelectionEvent {
  public static void main(String[] args) {
    Display display = new Display();
    Shell shell = new Shell(display);
    Table table = new Table(shell, SWT.BORDER | SWT.V_SCROLL | SWT.H_SCROLL);
    for (int i = 0; i < 12; i++) {
      TableItem item = new TableItem(table, SWT.NONE);
      item.setText("Item " + i);
    }
    table.setSize(100, 100);
    table.addListener(SWT.Selection, new Listener() {
      public void handleEvent(Event event) {
        String string = event.detail == SWT.CHECK ? "Checked" : "Selected";
        System.out.println(event.item + " " + string);
      }
    });
    
    shell.setSize(200, 200);
    shell.open();
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch())
        display.sleep();
    }
    display.dispose();
  }
}





Table SetData Event

/*******************************************************************************
 * Copyright (c) 2000, 2005 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;
/*
 * Create a virtual table and add 1000 entries to it every 500 ms.
 *
 * For a list of all SWT example snippets see
 * http://www.eclipse.org/swt/snippets/
 * 
 * @since 3.0
 */
import java.util.Random;
import org.eclipse.swt.SWT;
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.TableItem;
public class TableSetDataEvent {
  static int[] data = new int[0];
  public static void main(String[] args) {
    final Display display = new Display();
    Shell shell = new Shell(display);
    shell.setLayout(new FillLayout());
    final Table table = new Table(shell, SWT.BORDER | SWT.VIRTUAL);
    table.addListener(SWT.SetData, new Listener() {
      public void handleEvent(Event e) {
        System.out.println(e);
        TableItem item = (TableItem) e.item;
        int index = table.indexOf(item);
        item.setText("Item " + data[index]);
      }
    });
    int count = 0;
    Random random = new Random();
    while (count++ < 50) {
      int grow = 10;
      int[] newData = new int[data.length + grow];
      System.arraycopy(data, 0, newData, 0, data.length);
      int index = data.length;
      data = newData;
      for (int j = 0; j < grow; j++) {
        data[index++] = random.nextInt();
      }
      table.setItemCount(data.length);
      table.clearAll();
    }
    shell.open();
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch())
        display.sleep();
    }
    display.dispose();
  }
}


Источник — «http://jexp.ru/index.php?title=Java_Tutorial/SWT/Table_Event&oldid=3006»