Demonstrates CellEditors : Table « SWT JFace Eclipse « Java

Demonstrates CellEditors

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import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import org.eclipse.jface.viewers.CellEditor;
import org.eclipse.jface.viewers.CheckboxCellEditor;
import org.eclipse.jface.viewers.ColorCellEditor;
import org.eclipse.jface.viewers.ComboBoxCellEditor;
import org.eclipse.jface.viewers.ICellModifier;
import org.eclipse.jface.viewers.ILabelProviderListener;
import org.eclipse.jface.viewers.IStructuredContentProvider;
import org.eclipse.jface.viewers.ITableLabelProvider;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.jface.viewers.TextCellEditor;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.window.ApplicationWindow;
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.graphics.RGB;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Item;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableColumn;

/**
 * This class demonstrates CellEditors. It allows you to create and edit Person
 * objects
 */
public class PersonEditor extends ApplicationWindow {
  // Table column names/properties
  public static final String NAME = "Name";

  public static final String MALE = "Male?";

  public static final String AGE = "Age Range";

  public static final String SHIRT_COLOR = "Shirt Color";

  public static final String[] PROPS = { NAME, MALE, AGE, SHIRT_COLOR };

  // The data model
  private java.util.List people;

  /**
   * Constructs a PersonEditor
   */
  public PersonEditor() {
    super(null);
    people = new ArrayList();
  }

  /**
   * Runs the application
   */
  public void run() {
    // Don't return from open() until window closes
    setBlockOnOpen(true);

    // Open the main window
    open();

    // Dispose the display
    Display.getCurrent().dispose();
  }

  /**
   * Configures the shell
   * 
   * @param shell
   *            the shell
   */
  protected void configureShell(Shell shell) {
    super.configureShell(shell);
    shell.setText("Person Editor");
    shell.setSize(400, 400);
  }

  /**
   * Creates the main window's contents
   * 
   * @param parent
   *            the main window
   * @return Control
   */
  protected Control createContents(Composite parent) {
    Composite composite = new Composite(parent, SWT.NONE);
    composite.setLayout(new GridLayout(1, false));

    // Add a button to create the new person
    Button newPerson = new Button(composite, SWT.PUSH);
    newPerson.setText("Create New Person");

    // Add the TableViewer
    final TableViewer tv = new TableViewer(composite, SWT.FULL_SELECTION);
    tv.setContentProvider(new PersonContentProvider());
    tv.setLabelProvider(new PersonLabelProvider());
    tv.setInput(people);

    // Set up the table
    Table table = tv.getTable();
    table.setLayoutData(new GridData(GridData.FILL_BOTH));

    new TableColumn(table, SWT.CENTER).setText(NAME);
    new TableColumn(table, SWT.CENTER).setText(MALE);
    new TableColumn(table, SWT.CENTER).setText(AGE);
    new TableColumn(table, SWT.CENTER).setText(SHIRT_COLOR);

    for (int i = 0, n = table.getColumnCount(); i < n; i++) {
      table.getColumn(i).pack();
    }

    table.setHeaderVisible(true);
    table.setLinesVisible(true);

    // Add a new person when the user clicks button
    newPerson.addSelectionListener(new SelectionAdapter() {
      public void widgetSelected(SelectionEvent event) {
        Person p = new Person();
        p.setName("Name");
        p.setMale(true);
        p.setAgeRange(Integer.valueOf("0"));
        p.setShirtColor(new RGB(255, 0, 0));
        people.add(p);
        tv.refresh();
      }
    });

    // Create the cell editors
    CellEditor[] editors = new CellEditor[4];
    editors[0] = new TextCellEditor(table);
    editors[1] = new CheckboxCellEditor(table);
    editors[2] = new ComboBoxCellEditor(table, AgeRange.INSTANCES,
        SWT.READ_ONLY);
    editors[3] = new ColorCellEditor(table);

    // Set the editors, cell modifier, and column properties
    tv.setColumnProperties(PROPS);
    tv.setCellModifier(new PersonCellModifier(tv));
    tv.setCellEditors(editors);

    return composite;
  }

  /**
   * The application entry point
   * 
   * @param args
   *            the command line arguments
   */
  public static void main(String[] args) {
    new PersonEditor().run();
  }
}

/**
 * This class provides the content for the person table
 */

class PersonContentProvider implements IStructuredContentProvider {
  /**
   * Returns the Person objects
   */
  public Object[] getElements(Object inputElement) {
    return ((List) inputElement).toArray();
  }

  /**
   * Disposes any created resources
   */
  public void dispose() {
    // Do nothing
  }

  /**
   * Called when the input changes
   */
  public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
    // Ignore
  }
}

/**
 * This class provides the content for the FoodList application
 */

class FoodContentProvider implements IStructuredContentProvider {
  /**
   * Gets the food items for the list
   * 
   * @param arg0
   *            the data model
   * @return Object[]
   */
  public Object[] getElements(Object arg0) {
    return ((GroceryList) arg0).getFoods().toArray();
  }

  /**
   * Disposes any created resources
   */
  public void dispose() {
    // Do nothing
  }

  /**
   * Called when the input changes
   * 
   * @param arg0
   *            the viewer
   * @param arg1
   *            the old input
   * @param arg2
   *            the new input
   */
  public void inputChanged(Viewer arg0, Object arg1, Object arg2) {
    // Do nothing
  }
}

/**
 * This class represents the cell modifier for the PersonEditor program
 */

class PersonCellModifier implements ICellModifier {
  private Viewer viewer;

  public PersonCellModifier(Viewer viewer) {
    this.viewer = viewer;
  }

  /**
   * Returns whether the property can be modified
   * 
   * @param element
   *            the element
   * @param property
   *            the property
   * @return boolean
   */
  public boolean canModify(Object element, String property) {
    // Allow editing of all values
    return true;
  }

  /**
   * Returns the value for the property
   * 
   * @param element
   *            the element
   * @param property
   *            the property
   * @return Object
   */
  public Object getValue(Object element, String property) {
    Person p = (Person) element;
    if (PersonEditor.NAME.equals(property))
      return p.getName();
    else if (PersonEditor.MALE.equals(property))
      return Boolean.valueOf(p.isMale());
    else if (PersonEditor.AGE.equals(property))
      return p.getAgeRange();
    else if (PersonEditor.SHIRT_COLOR.equals(property))
      return p.getShirtColor();
    else
      return null;
  }

  /**
   * Modifies the element
   * 
   * @param element
   *            the element
   * @param property
   *            the property
   * @param value
   *            the value
   */
  public void modify(Object element, String property, Object value) {
    if (element instanceof Item)
      element = ((Item) element).getData();

    Person p = (Person) element;
    if (PersonEditor.NAME.equals(property))
      p.setName((String) value);
    else if (PersonEditor.MALE.equals(property))
      p.setMale(((Boolean) value).booleanValue());
    else if (PersonEditor.AGE.equals(property))
      p.setAgeRange((Integer) value);
    else if (PersonEditor.SHIRT_COLOR.equals(property))
      p.setShirtColor((RGB) value);

    // Force the viewer to refresh
    viewer.refresh();
  }
}

/**
 * This class represents a person
 */

class Person {
  private String name;

  private boolean male;

  private Integer ageRange;

  private RGB shirtColor;

  /**
   * @return Returns the ageRange.
   */
  public Integer getAgeRange() {
    return ageRange;
  }

  /**
   * @param ageRange
   *            The ageRange to set.
   */
  public void setAgeRange(Integer ageRange) {
    this.ageRange = ageRange;
  }

  /**
   * @return Returns the male.
   */
  public boolean isMale() {
    return male;
  }

  /**
   * @param male
   *            The male to set.
   */
  public void setMale(boolean male) {
    this.male = male;
  }

  /**
   * @return Returns the name.
   */
  public String getName() {
    return name;
  }

  /**
   * @param name
   *            The name to set.
   */
  public void setName(String name) {
    this.name = name;
  }

  /**
   * @return Returns the shirtColor.
   */
  public RGB getShirtColor() {
    return shirtColor;
  }

  /**
   * @param shirtColor
   *            The shirtColor to set.
   */
  public void setShirtColor(RGB shirtColor) {
    this.shirtColor = shirtColor;
  }
}

/**
 * This class contains all the foods on the "grocery list"
 */

class GroceryList {
  // Holds the foods
  private List foods;

  /**
   * Constructs a grocery list
   */
  public GroceryList() {
    foods = new ArrayList();

    // Add some foods
    foods.add(new Food("Broccoli", true));
    foods.add(new Food("Bundt Cake", false));
    foods.add(new Food("Cabbage", true));
    foods.add(new Food("Candy Canes", false));
    foods.add(new Food("Eggs", true));
    foods.add(new Food("Potato Chips", false));
    foods.add(new Food("Milk", true));
    foods.add(new Food("Soda", false));
    foods.add(new Food("Chicken", true));
    foods.add(new Food("Cinnamon Rolls", false));
  }

  /**
   * Returns the foods in this grocery list
   * 
   * @return List
   */
  public List getFoods() {
    return Collections.unmodifiableList(foods);
  }
}

/**
 * This class represents a type of food
 */

class Food {
  // The name of the food
  private String name;

  // Is it healthy?
  private boolean healthy;

  /**
   * Food constructor
   * 
   * @param name
   *            the name
   * @param healthy
   *            whether or not it's healthy
   */
  public Food(String name, boolean healthy) {
    this.name = name;
    this.healthy = healthy;
  }

  /**
   * Gets whether this is healthy
   * 
   * @return boolean
   */
  public boolean isHealthy() {
    return healthy;
  }

  /**
   * Gets the name
   * 
   * @return String
   */
  public String getName() {
    return name;
  }
}

/**
 * This class provides the labels for the person table
 */

class PersonLabelProvider implements ITableLabelProvider {
  /**
   * Returns the image
   * 
   * @param element
   *            the element
   * @param columnIndex
   *            the column index
   * @return Image
   */
  public Image getColumnImage(Object element, int columnIndex) {
    return null;
  }

  /**
   * Returns the column text
   * 
   * @param element
   *            the element
   * @param columnIndex
   *            the column index
   * @return String
   */
  public String getColumnText(Object element, int columnIndex) {
    Person person = (Person) element;
    switch (columnIndex) {
    case 0:
      return person.getName();
    case 1:
      return Boolean.toString(person.isMale());
    case 2:
      return AgeRange.INSTANCES[person.getAgeRange().intValue()];
    case 3:
      return person.getShirtColor().toString();
    }
    return null;
  }

  /**
   * Adds a listener
   * 
   * @param listener
   *            the listener
   */
  public void addListener(ILabelProviderListener listener) {
    // Ignore it
  }

  /**
   * Disposes any created resources
   */
  public void dispose() {
    // Nothing to dispose
  }

  /**
   * Returns whether altering this property on this element will affect the
   * label
   * 
   * @param element
   *            the element
   * @param property
   *            the property
   * @return boolean
   */
  public boolean isLabelProperty(Object element, String property) {
    return false;
  }

  /**
   * Removes a listener
   * 
   * @param listener
   *            the listener
   */
  public void removeListener(ILabelProviderListener listener) {
    // Ignore
  }
}


/**
 * This class encapsulates age ranges
 */

class AgeRange {
  public static final String NONE = "";

  public static final String BABY = "0 - 3";

  public static final String TODDLER = "4 - 7";

  public static final String CHILD = "8 - 12";

  public static final String TEENAGER = "13 - 19";

  public static final String ADULT = "20 - ?";

  public static final String[] INSTANCES = { NONE, BABY, TODDLER, CHILD,
      TEENAGER, ADULT };
}

           
       

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