/*******************************************************************************
* Copyright (c) 2006, 2007 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
* Tom Schindl <tom.schindl@bestsolution.at> - initial API and implementation
* - Fix for bug 174355, 171126
*******************************************************************************/
package org.eclipse.jface.viewers;
import java.util.LinkedList;
import org.eclipse.core.runtime.Assert;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Tree;
import org.eclipse.swt.widgets.TreeItem;
import org.eclipse.swt.widgets.Widget;
/**
* TreeViewerRow is the Tree implementation of ViewerRow.
* @since 3.3
*
*/
public class TreeViewerRow extends ViewerRow {
private TreeItem item;
/**
* Create a new instance of the receiver.
* @param item
*/
TreeViewerRow(TreeItem item) {
this.item = item;
}
/* (non-Javadoc)
* @see org.eclipse.jface.viewers.ViewerRow#getBounds(int)
*/
public Rectangle getBounds(int columnIndex) {
return item.getBounds(columnIndex);
}
/* (non-Javadoc)
* @see org.eclipse.jface.viewers.ViewerRow#getBounds()
*/
public Rectangle getBounds() {
return item.getBounds();
}
/* (non-Javadoc)
* @see org.eclipse.jface.viewers.ViewerRow#getColumnCount()
*/
public int getColumnCount() {
return item.getParent().getColumnCount();
}
/* (non-Javadoc)
* @see org.eclipse.jface.viewers.ViewerRow#getItem()
*/
public Widget getItem() {
return item;
}
/* (non-Javadoc)
* @see org.eclipse.jface.viewers.ViewerRow#getBackground(int)
*/
public Color getBackground(int columnIndex) {
return item.getBackground(columnIndex);
}
/* (non-Javadoc)
* @see org.eclipse.jface.viewers.ViewerRow#getFont(int)
*/
public Font getFont(int columnIndex) {
return item.getFont(columnIndex);
}
/* (non-Javadoc)
* @see org.eclipse.jface.viewers.ViewerRow#getForeground(int)
*/
public Color getForeground(int columnIndex) {
return item.getForeground(columnIndex);
}
/* (non-Javadoc)
* @see org.eclipse.jface.viewers.ViewerRow#getImage(int)
*/
public Image getImage(int columnIndex) {
return item.getImage(columnIndex);
}
/* (non-Javadoc)
* @see org.eclipse.jface.viewers.ViewerRow#getText(int)
*/
public String getText(int columnIndex) {
return item.getText(columnIndex);
}
/* (non-Javadoc)
* @see org.eclipse.jface.viewers.ViewerRow#setBackground(int, org.eclipse.swt.graphics.Color)
*/
public void setBackground(int columnIndex, Color color) {
item.setBackground(columnIndex, color);
}
/* (non-Javadoc)
* @see org.eclipse.jface.viewers.ViewerRow#setFont(int, org.eclipse.swt.graphics.Font)
*/
public void setFont(int columnIndex, Font font) {
item.setFont(columnIndex, font);
}
/* (non-Javadoc)
* @see org.eclipse.jface.viewers.ViewerRow#setForeground(int, org.eclipse.swt.graphics.Color)
*/
public void setForeground(int columnIndex, Color color) {
item.setForeground(columnIndex, color);
}
/* (non-Javadoc)
* @see org.eclipse.jface.viewers.ViewerRow#setImage(int, org.eclipse.swt.graphics.Image)
*/
public void setImage(int columnIndex, Image image) {
Image oldImage = item.getImage(columnIndex);
if (image != oldImage) {
item.setImage(columnIndex, image);
}
}
/* (non-Javadoc)
* @see org.eclipse.jface.viewers.ViewerRow#setText(int, java.lang.String)
*/
public void setText(int columnIndex, String text) {
item.setText(columnIndex, text == null ? "" : text); //$NON-NLS-1$
}
/* (non-Javadoc)
* @see org.eclipse.jface.viewers.ViewerRow#getControl()
*/
public Control getControl() {
return item.getParent();
}
public ViewerRow getNeighbor(int direction, boolean sameLevel) {
if( direction == ViewerRow.ABOVE ) {
return getRowAbove(sameLevel);
} else if( direction == ViewerRow.BELOW ) {
return getRowBelow(sameLevel);
} else {
throw new IllegalArgumentException("Illegal value of direction argument."); //$NON-NLS-1$
}
}
private ViewerRow getRowBelow(boolean sameLevel) {
Tree tree = item.getParent();
// This means we have top-level item
if( item.getParentItem() == null ) {
if( sameLevel || ! item.getExpanded() ) {
int index = tree.indexOf(item) + 1;
if( index < tree.getItemCount() ) {
return new TreeViewerRow(tree.getItem(index));
}
} else if( item.getExpanded() && item.getItemCount() > 0 ) {
return new TreeViewerRow(item.getItem(0));
}
} else {
if( sameLevel || ! item.getExpanded() ) {
TreeItem parentItem = item.getParentItem();
int nextIndex = parentItem.indexOf(item) + 1;
int totalIndex = parentItem.getItemCount();
TreeItem itemAfter;
// This would mean that it was the last item
if( nextIndex == totalIndex ) {
itemAfter = findNextItem( parentItem );
} else {
itemAfter = parentItem.getItem(nextIndex);
}
if( itemAfter != null ) {
return new TreeViewerRow(itemAfter);
}
} else if( item.getExpanded() && item.getItemCount() > 0 ) {
return new TreeViewerRow(item.getItem(0));
}
}
return null;
}
private ViewerRow getRowAbove(boolean sameLevel) {
Tree tree = item.getParent();
// This means we have top-level item
if( item.getParentItem() == null ) {
int index = tree.indexOf(item) - 1;
TreeItem nextTopItem = null;
if( index >= 0 ) {
nextTopItem = tree.getItem(index);
}
if( nextTopItem != null ) {
if( sameLevel ) {
return new TreeViewerRow(nextTopItem);
}
return new TreeViewerRow(findLastVisibleItem(nextTopItem));
}
} else {
TreeItem parentItem = item.getParentItem();
int previousIndex = parentItem.indexOf(item) - 1;
TreeItem itemBefore;
if( previousIndex >= 0 ) {
if( sameLevel ) {
itemBefore = parentItem.getItem(previousIndex);
} else {
itemBefore = findLastVisibleItem(parentItem.getItem(previousIndex));
}
} else {
itemBefore = parentItem;
}
if( itemBefore != null ) {
return new TreeViewerRow(itemBefore);
}
}
return null;
}
private TreeItem findLastVisibleItem(TreeItem parentItem) {
TreeItem rv = parentItem;
while( rv.getExpanded() && rv.getItemCount() > 0 ) {
rv = rv.getItem(rv.getItemCount()-1);
}
return rv;
}
private TreeItem findNextItem(TreeItem item) {
TreeItem rv = null;
Tree tree = item.getParent();
TreeItem parentItem = item.getParentItem();
int nextIndex;
int totalItems;
if( parentItem == null ) {
nextIndex = tree.indexOf(item) + 1;
totalItems = tree.getItemCount();
} else {
nextIndex = parentItem.indexOf(item) + 1;
totalItems = parentItem.getItemCount();
}
// This is once more the last item in the tree
// Search on
if( nextIndex == totalItems ) {
if( item.getParentItem() != null ) {
rv = findNextItem(item.getParentItem());
}
} else {
if( parentItem == null ) {
rv = tree.getItem(nextIndex);
} else {
rv = parentItem.getItem(nextIndex);
}
}
return rv;
}
public TreePath getTreePath() {
TreeItem tItem = item;
LinkedList segments = new LinkedList();
while (tItem != null) {
Object segment = tItem.getData();
Assert.isNotNull(segment);
segments.addFirst(segment);
tItem = tItem.getParentItem();
}
return new TreePath(segments.toArray());
}
void setItem(TreeItem item) {
this.item = item;
}
public Object clone() {
return new TreeViewerRow(item);
}
public Object getElement() {
return item.getData();
}
}