org.eclipse.jface.viewers.TreeViewerRow Maven / Gradle / Ivy
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/*******************************************************************************
* Copyright (c) 2006, 2014 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
* Tom Schindl - initial API and implementation
* - fix in bug: 174355,171126,,195908,198035,215069,227421
*******************************************************************************/
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.
*/
TreeViewerRow(TreeItem item) {
this.item = item;
}
@Override
public Rectangle getBounds(int columnIndex) {
return item.getBounds(columnIndex);
}
@Override
public Rectangle getBounds() {
return item.getBounds();
}
@Override
public int getColumnCount() {
return item.getParent().getColumnCount();
}
@Override
public Widget getItem() {
return item;
}
@Override
public Color getBackground(int columnIndex) {
return item.getBackground(columnIndex);
}
@Override
public Font getFont(int columnIndex) {
return item.getFont(columnIndex);
}
@Override
public Color getForeground(int columnIndex) {
return item.getForeground(columnIndex);
}
@Override
public Image getImage(int columnIndex) {
return item.getImage(columnIndex);
}
@Override
public String getText(int columnIndex) {
return item.getText(columnIndex);
}
@Override
public void setBackground(int columnIndex, Color color) {
item.setBackground(columnIndex, color);
}
@Override
public void setFont(int columnIndex, Font font) {
item.setFont(columnIndex, font);
}
@Override
public void setForeground(int columnIndex, Color color) {
item.setForeground(columnIndex, color);
}
@Override
public void setImage(int columnIndex, Image image) {
Image oldImage = item.getImage(columnIndex);
if (image != oldImage) {
item.setImage(columnIndex, image);
}
}
@Override
public void setText(int columnIndex, String text) {
item.setText(columnIndex, text == null ? "" : text); //$NON-NLS-1$
}
@Override
public Control getControl() {
return item.getParent();
}
@Override
public ViewerRow getNeighbor(int direction, boolean sameLevel) {
switch (direction) {
case ViewerRow.ABOVE:
return getRowAbove(sameLevel);
case ViewerRow.BELOW:
return getRowBelow(sameLevel);
default:
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;
}
@Override
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;
}
@Override
public Object clone() {
return new TreeViewerRow(item);
}
@Override
public Object getElement() {
return item.getData();
}
@Override
public int getVisualIndex(int creationIndex) {
int[] order = item.getParent().getColumnOrder();
for (int i = 0; i < order.length; i++) {
if (order[i] == creationIndex) {
return i;
}
}
return super.getVisualIndex(creationIndex);
}
@Override
public int getCreationIndex(int visualIndex) {
if (item != null && !item.isDisposed() && hasColumns()
&& isValidOrderIndex(visualIndex)) {
return item.getParent().getColumnOrder()[visualIndex];
}
return super.getCreationIndex(visualIndex);
}
@Override
public Rectangle getTextBounds(int index) {
return item.getTextBounds(index);
}
@Override
public Rectangle getImageBounds(int index) {
return item.getImageBounds(index);
}
private boolean hasColumns() {
return this.item.getParent().getColumnCount() != 0;
}
private boolean isValidOrderIndex(int currentIndex) {
return currentIndex < this.item.getParent().getColumnOrder().length;
}
@Override
int getWidth(int columnIndex) {
return item.getParent().getColumn(columnIndex).getWidth();
}
@Override
protected boolean scrollCellIntoView(int columnIndex) {
item.getParent().showItem(item);
if (hasColumns()) {
item.getParent()
.showColumn(item.getParent().getColumn(columnIndex));
}
return true;
}
}