Mega Code Archive
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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