| /******************************************************************************* |
| * Copyright (c) 2000, 2010 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.gef.palette; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.eclipse.jface.resource.ImageDescriptor; |
| |
| /** |
| * Default implementation of PaletteContainer |
| * |
| * @author Pratik Shah |
| */ |
| public class PaletteContainer extends PaletteEntry { |
| |
| /** |
| * Property name indicating that this PaletteContainer's children have |
| * changed |
| */ |
| public static final String PROPERTY_CHILDREN = "Children Changed"; //$NON-NLS-1$ |
| |
| /** |
| * This container's contents |
| */ |
| protected List children = new ArrayList(); |
| |
| /** |
| * Constructor |
| * <p> |
| * Any parameter can be <code>null</code>. |
| * </p> |
| * |
| * @param label |
| * The container's name |
| * @param desc |
| * The container's description |
| * @param icon |
| * The small icon to represent this container |
| * @param type |
| * The container's type |
| */ |
| protected PaletteContainer(String label, String desc, ImageDescriptor icon, |
| Object type) { |
| super(label, desc, icon, null, type); |
| } |
| |
| /** |
| * Returns true if this type can be a child of this container. |
| * |
| * @param type |
| * the type being requested |
| * @return true if this can be a child of this container |
| */ |
| public boolean acceptsType(Object type) { |
| return true; |
| } |
| |
| /** |
| * Adds the given entry to the end of this PaletteContainer |
| * |
| * @param entry |
| * the PaletteEntry to add |
| */ |
| public void add(PaletteEntry entry) { |
| add(-1, entry); |
| } |
| |
| /** |
| * Adds the given PaletteEntry at position <code>index</code>. |
| * |
| * @param index |
| * position to add the PaletteEntry |
| * @param entry |
| * the PaletteEntry to add |
| */ |
| public void add(int index, PaletteEntry entry) { |
| if (!acceptsType(entry.getType())) |
| throw new IllegalArgumentException( |
| "This container can not contain this type of child: " //$NON-NLS-1$ |
| + entry.getType()); |
| |
| List oldChildren = new ArrayList(getChildren()); |
| |
| int actualIndex = index < 0 ? getChildren().size() : index; |
| getChildren().add(actualIndex, entry); |
| entry.setParent(this); |
| listeners.firePropertyChange(PROPERTY_CHILDREN, oldChildren, |
| getChildren()); |
| } |
| |
| /** |
| * Adds the list of {@link PaletteEntry} objects to this PaletteContainer. |
| * |
| * @param list |
| * a list of PaletteEntry objects to add to this PaletteContainer |
| */ |
| public void addAll(List list) { |
| ArrayList oldChildren = new ArrayList(getChildren()); |
| for (int i = 0; i < list.size(); i++) { |
| PaletteEntry child = (PaletteEntry) list.get(i); |
| if (!acceptsType(child.getType())) |
| throw new IllegalArgumentException( |
| "This container can not contain this type of child: " //$NON-NLS-1$ |
| + child.getType()); |
| getChildren().add(child); |
| child.setParent(this); |
| } |
| listeners.firePropertyChange(PROPERTY_CHILDREN, oldChildren, |
| getChildren()); |
| } |
| |
| /** |
| * Appends the given entry after the entry with the given id, but before the |
| * next separator. |
| * |
| * @param id |
| * the id of the entry to append after |
| * @param entry |
| * the entry to add |
| */ |
| public void appendToSection(String id, PaletteEntry entry) { |
| // find the entry with the given id |
| boolean found = false; |
| for (int i = 0; i < getChildren().size(); i++) { |
| PaletteEntry currEntry = (PaletteEntry) getChildren().get(i); |
| if (currEntry.getId().equals(id)) |
| found = true; |
| else if (found && currEntry instanceof PaletteSeparator) { |
| add(i, entry); |
| return; |
| } |
| } |
| if (found) |
| add(entry); |
| else |
| throw new IllegalArgumentException("Section not found: " + id); //$NON-NLS-1$ |
| } |
| |
| /** |
| * @return the children of this container |
| */ |
| public List getChildren() { |
| return children; |
| } |
| |
| private boolean move(PaletteEntry entry, boolean up) { |
| int index = getChildren().indexOf(entry); |
| if (index < 0) { |
| // This container does not contain the given palette entry |
| return false; |
| } |
| index = up ? index - 1 : index + 1; |
| if (index < 0 || index >= getChildren().size()) { |
| // Performing the move operation will give the child an invalid |
| // index |
| return false; |
| } |
| if (getChildren().get(index) instanceof PaletteContainer |
| && getUserModificationPermission() == PaletteEntry.PERMISSION_FULL_MODIFICATION) { |
| // move it into a container if we have full permission |
| PaletteContainer container = (PaletteContainer) getChildren().get( |
| index); |
| if (container.acceptsType(entry.getType()) |
| && container.getUserModificationPermission() == PaletteEntry.PERMISSION_FULL_MODIFICATION) { |
| remove(entry); |
| if (up) |
| container.add(entry); |
| else |
| container.add(0, entry); |
| return true; |
| } |
| } |
| List oldChildren = new ArrayList(getChildren()); |
| getChildren().remove(entry); |
| getChildren().add(index, entry); |
| listeners.firePropertyChange(PROPERTY_CHILDREN, oldChildren, |
| getChildren()); |
| return true; |
| } |
| |
| /** |
| * Moves the given entry down, if possible. This method only handles moving |
| * the child within this container. |
| * |
| * @param entry |
| * The entry to be moved |
| * @return <code>true</code> if the given entry was successfully moved down |
| */ |
| public boolean moveDown(PaletteEntry entry) { |
| return move(entry, false); |
| } |
| |
| /** |
| * Moves the given entry up, if possible. This method only handles moving |
| * the child within this container. |
| * |
| * @param entry |
| * The entry to be moved |
| * @return <code>true</code> if the given entry was successfully moved up |
| */ |
| public boolean moveUp(PaletteEntry entry) { |
| return move(entry, true); |
| } |
| |
| /** |
| * Removes the given PaletteEntry from this PaletteContainer |
| * |
| * @param entry |
| * the PaletteEntry to remove |
| */ |
| public void remove(PaletteEntry entry) { |
| List oldChildren = new ArrayList(getChildren()); |
| if (getChildren().remove(entry)) { |
| entry.setParent(null); |
| listeners.firePropertyChange(PROPERTY_CHILDREN, oldChildren, |
| getChildren()); |
| } |
| } |
| |
| /** |
| * Sets the children of this PaletteContainer to the given list of |
| * {@link PaletteEntry} objects. |
| * |
| * @param list |
| * the list of children |
| */ |
| public void setChildren(List list) { |
| List oldChildren = children; |
| for (int i = 0; i < oldChildren.size(); i++) { |
| PaletteEntry entry = (PaletteEntry) oldChildren.get(i); |
| entry.setParent(null); |
| } |
| children = list; |
| for (int i = 0; i < children.size(); i++) { |
| PaletteEntry entry = (PaletteEntry) children.get(i); |
| entry.setParent(this); |
| } |
| listeners.firePropertyChange(PROPERTY_CHILDREN, oldChildren, |
| getChildren()); |
| } |
| |
| /** |
| * @see java.lang.Object#toString() |
| */ |
| public String toString() { |
| return "Palette Container (" //$NON-NLS-1$ |
| + (getLabel() != null ? getLabel() : "") //$NON-NLS-1$ |
| + ")"; //$NON-NLS-1$ |
| } |
| |
| } |