Java/SWT JFace Eclipse/List

Demonstrates Lists

//Send questions, comments, bug reports, etc. to the authors:
//Rob Warner (rwarner@interspatial.ru)
//Robert Harris (rbrt_harris@yahoo.ru)
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;
/**
 * This class demonstrates Lists
 */
public class ListExample {
  // Strings to use as list items
  private static final String[] ITEMS = { "Alpha", "Bravo", "Charlie", "Delta",
    "Echo", "Foxtrot", "Golf", "Hotel", "India", "Juliet", "Kilo", "Lima", "Mike",
    "November", "Oscar", "Papa", "Quebec", "Romeo", "Sierra", "Tango", "Uniform",
    "Victor", "Whiskey", "X-Ray", "Yankee", "Zulu"
  };
  
  public static void main(String[] args) {
    Display display = new Display();
    Shell shell = new Shell(display);
    shell.setLayout(new FillLayout());
    
    // Create a single-selection list
    List single = new List(shell, SWT.BORDER | SWT.SINGLE | SWT.V_SCROLL);
    
    // Add the items, one by one
    for (int i = 0, n = ITEMS.length; i < n; i++) {
      single.add(ITEMS[i]);
    }
    
    // Select the 5th items
    single.select(4);
    
    // Create a multiple-selection list
    List multi = new List(shell, SWT.BORDER | SWT.MULTI | SWT.V_SCROLL);
    
    // Add the items all at once
    multi.setItems(ITEMS);
    
    // Select the 10th through 12th items
    multi.select(9, 11);
    
    shell.open();
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch()) {
        display.sleep();
      }
    }
    display.dispose();
  }
}

List Demo

import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.layout.FormAttachment;
import org.eclipse.swt.layout.FormData;
import org.eclipse.swt.layout.FormLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.List;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;

public class SWTListDemo {
    public static void main (String [] args) {
      Display display = new Display ();
      final Shell shell = new Shell (display);
      Label label = new Label (shell, SWT.WRAP);
      label.setText ("This is a long text string that will wrap when the dialog is resized.");
      List list = new List (shell, SWT.BORDER | SWT.H_SCROLL | SWT.V_SCROLL);
      list.setItems (new String [] {"Item 1", "Item2"});
      Button button1 = new Button (shell, SWT.PUSH);
      button1.setText ("Ok");
      Button button2 = new Button (shell, SWT.PUSH);
      button2.setText ("Cancel");
      
      final int insetX = 4, insetY = 4;
      FormLayout formLayout = new FormLayout ();
      formLayout.marginWidth = insetX;
      formLayout.marginHeight = insetY;
      shell.setLayout (formLayout);
      
      Point size = label.ruputeSize (SWT.DEFAULT, SWT.DEFAULT);
      final FormData labelData = new FormData (size.x, SWT.DEFAULT);
      labelData.left = new FormAttachment (0, 0);
      labelData.right = new FormAttachment (100, 0);
      label.setLayoutData (labelData);
      shell.addListener (SWT.Resize, new Listener () {
        public void handleEvent (Event e) {
          Rectangle rect = shell.getClientArea ();
          labelData.width = rect.width - insetX * 2;
          shell.layout ();
        }
      });
        
      FormData button2Data = new FormData ();
      button2Data.right = new FormAttachment (100, -insetX);
      button2Data.bottom = new FormAttachment (100, 0);
      button2.setLayoutData (button2Data);
      
      FormData button1Data = new FormData ();
      button1Data.right = new FormAttachment (button2, -insetX);
      button1Data.bottom = new FormAttachment (100, 0);
      button1.setLayoutData (button1Data);
      
      FormData listData = new FormData ();
      listData.left = new FormAttachment (0, 0);
      listData.right = new FormAttachment (100, 0);
      listData.top = new FormAttachment (label, insetY);
      listData.bottom = new FormAttachment (button2, -insetY);
      list.setLayoutData (listData);
      
      shell.pack ();
      shell.open ();
      while (!shell.isDisposed ()) {
        if (!display.readAndDispatch ()) display.sleep ();
      }
      display.dispose ();
    }
}

List Example

import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.*;
public class SWTListExample {
    
    Display d;
    Shell s;
    SWTListExample()    {
        d = new Display();
        s = new Shell(d);
        s.setSize(250,250);
        
        s.setText("A List Example");
        final List l = new List(s, SWT.SINGLE | SWT.BORDER);
        l.setBounds(50, 50, 75, 75);
        l.add("Item One");
        l.add("Item Two");
        l.add("Item Three");
        l.add("Item Four");
        l.add("Item Five");        
        s.open();
        while(!s.isDisposed()){
            if(!d.readAndDispatch())
                d.sleep();
        }
        d.dispose();
    }
    public static void main(String[] argv){
      new SWTListExample();
    }
}

List Example 2

import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.List;
import org.eclipse.swt.widgets.Shell;
public class ListExample2 {
  Display d;
  Shell s;
  ListExample2() {
    d = new Display();
    s = new Shell(d);
    s.setSize(250, 250);
    s.setText("A List Example");
    String items[] = { "Item One", "Item Two", "Item Three", "Item Four",
        "Item Five" };
    final List l = new List(s, SWT.SINGLE | SWT.BORDER);
    l.setBounds(50, 50, 75, 75);
    l.setItems(items);
    s.open();
    while (!s.isDisposed()) {
      if (!d.readAndDispatch())
        d.sleep();
    }
    d.dispose();
  }
  public static void main(String[] argv) {
    new ListExample2();
  }
}

List Example 3

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.List;
import org.eclipse.swt.widgets.Shell;
public class ListExample3 {
  Display d;
  Shell s;
  ListExample3() {
    d = new Display();
    s = new Shell(d);
    s.setSize(250, 250);
    
    s.setText("A List Example");
    final List l = new List(s, SWT.MULTI | SWT.BORDER);
    l.setBounds(50, 50, 75, 75);
    l.add("Item One");
    l.add("Item Two");
    l.add("Item Three");
    l.add("Item Four");
    l.add("Item Five");
    final Button b1 = new Button(s, SWT.PUSH | SWT.BORDER);
    b1.setBounds(150, 150, 50, 25);
    b1.setText("Click Me");
    b1.addSelectionListener(new SelectionAdapter() {
      public void widgetSelected(SelectionEvent e) {
        String selected[] = l.getSelection();
        for (int i = 0; i < selected.length; i++) {
          System.out.println(selected[i]);
        }
      }
    });
    s.open();
    while (!s.isDisposed()) {
      if (!d.readAndDispatch())
        d.sleep();
    }
    d.dispose();
  }
  public static void main(String[] argv) {
    new ListExample3();
  }
}

Print selected items in a list

/*
 * List example snippet: print selected items in a list
 *
 * For a list of all SWT example snippets see
 * http://dev.eclipse.org/viewcvs/index.cgi/%7Echeckout%7E/platform-swt-home/dev.html#snippets
 */
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.List;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;
public class Snippet59 {
  public static void main(String[] args) {
    Display display = new Display();
    Shell shell = new Shell(display);
    final List list = new List(shell, SWT.BORDER | SWT.MULTI | SWT.V_SCROLL);
    for (int i = 0; i < 128; i++)
      list.add("Item " + i);
    list.setBounds(0, 0, 100, 100);
    list.addListener(SWT.Selection, new Listener() {
      public void handleEvent(Event e) {
        String string = "";
        int[] selection = list.getSelectionIndices();
        for (int i = 0; i < selection.length; i++)
          string += selection[i] + " ";
        System.out.println("Selection={" + string + "}");
      }
    });
    list.addListener(SWT.DefaultSelection, new Listener() {
      public void handleEvent(Event e) {
        String string = "";
        int[] selection = list.getSelectionIndices();
        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();
  }
}

Sample List

/******************************************************************************
 * Copyright (c) 1998, 2004 Jackwind Li Guojie
 * All right reserved. 
 * 
 * Created on Feb 8, 2004 8:21:31 PM by JACK
 * $Id$
 * 
 * visit: http://www.asprise.ru/swt
 *****************************************************************************/

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.layout.RowLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.List;
import org.eclipse.swt.widgets.Shell;
public class SampleList {
  Display display = new Display();
  Shell shell = new Shell(display);
  public SampleList() {
    init();
    
    RowLayout rowLayout = new RowLayout();
    shell.setLayout(rowLayout);
    
    (new Label(shell, SWT.NULL)).setText("What programming languages are you proficient in? ");
    
    final List list = new List(shell, SWT.SINGLE | SWT.BORDER | SWT.V_SCROLL);
    
    String[] languages = new String[]{"Java", "C", "C++", "SmallTalk"};
    
    for(int i=0; i<languages.length; i++)
      list.add(languages[i]);
    
    list.addSelectionListener(new SelectionListener() {
      public void widgetSelected(SelectionEvent e) {
        System.err.println(list.getSelectionIndex());
        int[] indices = list.getSelectionIndices();
        String[] items = list.getSelection();
        StringBuffer sb = new StringBuffer("Selected indices: ");
        for(int i=0; i < indices.length; i++) {
          sb.append(indices[i]);
          sb.append("(");
          sb.append(items[i]);
          sb.append(")");
          if(i == indices.length-1)
            sb.append(".");
          else
            sb.append(", ");
        }
        System.out.println(sb.toString());
      }
      public void widgetDefaultSelected(SelectionEvent e) {
        int[] indices = list.getSelectionIndices();
        String[] items = list.getSelection();
        StringBuffer sb = new StringBuffer("Default selected indices: ");
        for(int i=0; i < indices.length; i++) {
          sb.append(indices[i]);
          sb.append("(");
          sb.append(items[i]);
          sb.append(")");
          if(i == indices.length-1)
            sb.append(".");
          else
            sb.append(", ");
        }
        System.out.println(sb.toString());
      }
    });
    
    list.selectAll();
    //list.select(1);
    shell.pack();
    shell.open();
    //textUser.forceFocus();
    // Set up the event loop.
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch()) {
        // If no more entries in event queue
        display.sleep();
      }
    }
    display.dispose();
  }
  private void init() {
  }
  public static void main(String[] args) {
    new SampleList();
  }
}

Single Multi Lists

/******************************************************************************
 * Copyright (c) 1998, 2004 Jackwind Li Guojie
 * All right reserved. 
 * 
 * Created on Feb 8, 2004 8:00:38 PM by JACK
 * $Id$
 * 
 * visit: http://www.asprise.ru/swt
 *****************************************************************************/

import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.List;
import org.eclipse.swt.widgets.Shell;
public class SingleMultiLists {
  Display display = new Display();
  Shell shell = new Shell(display);
  public SingleMultiLists() {
    init();
    
    GridLayout gridLayout = new GridLayout(2, true);
    
    shell.setLayout(gridLayout);
    
    (new Label(shell, SWT.NULL)).setText("SINGLE");
    (new Label(shell, SWT.NULL)).setText("MULTI");
    
    List singleSelectList = new List(shell, SWT.BORDER);
    
    List mutliSelectList = new List(shell, SWT.MULTI | SWT.BORDER);
    
    String[] items = new String[]{"Item 1", "Item 2", "Item 3", "Item 4"};
    
    for(int i=0; i<items.length; i++) {
      singleSelectList.add(items[i]);
      mutliSelectList.add(items[i]);
    }
    shell.pack();
    shell.open();
    //textUser.forceFocus();
    // Set up the event loop.
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch()) {
        // If no more entries in event queue
        display.sleep();
      }
    }
    display.dispose();
  }
  private void init() {
  }
  public static void main(String[] args) {
    new SingleMultiLists();
  }
}

SWT List Composite

import java.util.ArrayList;
import java.util.List;
import org.eclipse.jface.viewers.IStructuredContentProvider;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.jface.viewers.ListViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerFilter;
import org.eclipse.jface.viewers.ViewerSorter;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.ruposite;
public class Ch8ListComposite extends Composite {
  public Ch8ListComposite(Composite parent) {
    super(parent, SWT.NULL);
    populateControl();
  }
  protected void populateControl() {
    FillLayout compositeLayout = new FillLayout();
    setLayout(compositeLayout);
    int[] styles = { SWT.SINGLE, SWT.MULTI };
    for (int style = 0; style < styles.length; style++) {
      createListViewer(styles[style]);
    }
  }
  private void createListViewer(int style) {
    ListViewer viewer = new ListViewer(this, style);
    viewer.setLabelProvider(new LabelProvider() {
      public String getText(Object element) {
        return ((ListItem) element).name;
      }
    });
    viewer.addFilter(new ViewerFilter() {
      public boolean select(Viewer viewer, Object parent, Object element) {
        return ((ListItem) element).value % 2 == 0;
      }
    });
    viewer.setSorter(new ViewerSorter() {
      public int compare(Viewer viewer, Object obj1, Object obj2) {
        return ((ListItem) obj2).value - ((ListItem) obj1).value;
      }
    });
    viewer.setContentProvider(new IStructuredContentProvider() {
      public Object[] getElements(Object inputElement) {
        return ((List) inputElement).toArray();
      }
      public void dispose() {
      }
      public void inputChanged(Viewer viewer, Object oldInput,
          Object newInput) {
      }
    });
    List input = new ArrayList();
    for (int i = 0; i < 20; i++) {
      input.add(new ListItem("item " + i, i));
    }
    viewer.setInput(input);
  }
}
class ListItem {
  public String name;
  public int value;
  public ListItem(String n, int v) {
    name = n;
    value = v;
  }
}

SWT List Example Demo

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.List;
import org.eclipse.swt.widgets.Shell;
/**
 * @author Steven Holzner
 * 
 */
public class SWTListExampleDemo {
  public static void main(String[] args) {
    Display display = new Display();
    Shell shell = new Shell(display);
    shell.setText("List Example");
    shell.setSize(300, 200);
    shell.setLayout(new FillLayout(SWT.VERTICAL));
    final List list = new List(shell, SWT.BORDER | SWT.MULTI | SWT.V_SCROLL);
    for (int loopIndex = 0; loopIndex < 100; loopIndex++) {
      list.add("Item " + loopIndex);
    }
    list.addSelectionListener(new SelectionListener() {
      public void widgetSelected(SelectionEvent event) {
        int[] selections = list.getSelectionIndices();
        String outText = "";
        for (int loopIndex = 0; loopIndex < selections.length; loopIndex++)
          outText += selections[loopIndex] + " ";
        System.out.println("You selected: " + outText);
      }
      public void widgetDefaultSelected(SelectionEvent event) {
        int[] selections = list.getSelectionIndices();
        String outText = "";
        for (int loopIndex = 0; loopIndex < selections.length; loopIndex++)
          outText += selections[loopIndex] + " ";
        System.out.println("You selected: " + outText);
      }
    });
    shell.open();
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch())
        display.sleep();
    }
    display.dispose();
  }
}

SWT List Selection Event

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.List;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
public class ListClass {
  public static void main(String[] args) {
    Display display = new Display();
    Shell shell = new Shell(display);
    shell.setText("List Example");
    shell.setSize(300, 200);
    final List list = new List(shell, SWT.BORDER | SWT.MULTI | SWT.V_SCROLL);
    list.setBounds(40, 20, 220, 100);
    for (int loopIndex = 0; loopIndex < 9; loopIndex++) {
      list.add("Item Number " + loopIndex);
    }
    final Text text = new Text(shell, SWT.BORDER);
    text.setBounds(60, 130, 160, 25);
    list.addSelectionListener(new SelectionListener() {
      public void widgetSelected(SelectionEvent event) {
        int[] selectedItems = list.getSelectionIndices();
        String outString = "";
        for (int loopIndex = 0; loopIndex < selectedItems.length; loopIndex++)
          outString += selectedItems[loopIndex] + " ";
        text.setText("Selected Items: " + outString);
      }
      public void widgetDefaultSelected(SelectionEvent event) {
        int[] selectedItems = list.getSelectionIndices();
        String outString = "";
        for (int loopIndex = 0; loopIndex < selectedItems.length; loopIndex++)
          outString += selectedItems[loopIndex] + " ";
        System.out.println("Selected Items: " + outString);
      }
    });
    shell.open();
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch())
        display.sleep();
    }
    display.dispose();
  }
}