/*******************************************************************************
* Copyright (c) 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:
* rmcamara@us.ibm.com - initial API and implementation
* tom.schindl@bestsolution.at - various significant contributions
* mirko.paturzo@exeura.eu - improve performance
*******************************************************************************/
package org.eclipse.nebula.jface.gridviewer;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Comparator;
import java.util.Iterator;
import java.util.List;
import org.eclipse.jface.viewers.AbstractTableViewer;
import org.eclipse.jface.viewers.CellLabelProvider;
import org.eclipse.jface.viewers.ColumnViewerEditor;
import org.eclipse.jface.viewers.ColumnViewerEditorActivationEvent;
import org.eclipse.jface.viewers.ColumnViewerEditorActivationStrategy;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.ViewerCell;
import org.eclipse.jface.viewers.ViewerRow;
import org.eclipse.nebula.jface.gridviewer.internal.CellSelection;
import org.eclipse.nebula.jface.gridviewer.internal.SelectionWithFocusRow;
import org.eclipse.nebula.widgets.grid.DataVisualizer;
import org.eclipse.nebula.widgets.grid.Grid;
import org.eclipse.nebula.widgets.grid.GridItem;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.DisposeEvent;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Item;
import org.eclipse.swt.widgets.Widget;
/**
* A concrete viewer based on an Grid control.
* <p>
* This class is not intended to be subclassed outside the viewer framework. It
* is designed to be instantiated with a pre-existing Grid control and
* configured with a domain-specific content provider, label provider, element
* filter (optional), and element sorter (optional).
* <p>
* Content providers for grid table viewers must not implement the {@code
* ITreeContentProvider} interface. Instead a {@link GridTreeViewer} should be
* used.
* <p>
*
* @author Unknown...
* @author Mirko Paturzo <mirko.paturzo@exeura.eu>
*
* Mirko modified improve performace and reduce used memory fix memory
* leak and slow disposed object
*/
public class GridTableViewer extends AbstractTableViewer {
/** This viewer's grid control. */
private final Grid grid;
private GridViewerRow cachedRow;
private CellLabelProvider rowHeaderLabelProvider;
/**
* If true, this grid viewer will ensure that the grid's rows / GridItems
* are always sized to their preferred height.
*/
private boolean autoPreferredHeight = false;
/**
* Creates a grid viewer on a newly-created grid control under the given
* parent. The grid control is created using the SWT style bits
* <code>MULTI, H_SCROLL, V_SCROLL,</code> and <code>BORDER</code>. The
* viewer has no input, no content provider, a default label provider, no
* sorter, and no filters.
*
* @param parent
* the parent control
*/
public GridTableViewer(Composite parent) {
this(parent, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL | SWT.BORDER);
}
/**
* Creates a grid viewer on a newly-created grid control under the given
* parent. The grid control is created using the given SWT style bits. The
* viewer has no input, no content provider, a default label provider, no
* sorter, and no filters.
*
* @param dataVisualizer
* @param parent
* the parent control
* @param style
* the SWT style bits used to create the grid.
*/
public GridTableViewer(DataVisualizer dataVisualizer, Composite parent, int style) {
this(new Grid(dataVisualizer, parent, style));
}
/**
* Creates a grid viewer on a newly-created grid control under the given
* parent. The grid control is created using the SWT style bits
* <code>MULTI, H_SCROLL, V_SCROLL,</code> and <code>BORDER</code>. The
* viewer has no input, no content provider, a default label provider, no
* sorter, and no filters.
*
* @param dataVisualizer
* @param parent
* the parent control
*/
public GridTableViewer(DataVisualizer dataVisualizer, Composite parent) {
this(dataVisualizer, parent, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL | SWT.BORDER);
}
/**
* Creates a grid viewer on a newly-created grid control under the given
* parent. The grid control is created using the given SWT style bits. The
* viewer has no input, no content provider, a default label provider, no
* sorter, and no filters.
*
* @param parent
* the parent control
* @param style
* the SWT style bits used to create the grid.
*/
public GridTableViewer(Composite parent, int style) {
this(new Grid(parent, style));
}
/**
* Creates a grid viewer on the given grid control. The viewer has no input,
* no content provider, a default label provider, no sorter, and no filters.
*
* @param grid
* the grid control
*/
public GridTableViewer(Grid grid) {
this.grid = grid;
hookControl(grid);
}
/**
* Returns the underlying Grid Control.
*
* @return grid control.
*/
public Grid getGrid() {
return grid;
}
/** {@inheritDoc} */
@Override
protected ViewerRow internalCreateNewRowPart(int style, int rowIndex) {
GridItem item;
if (rowIndex >= 0) {
item = new GridItem(grid, style, rowIndex);
} else {
item = new GridItem(grid, style);
}
return getViewerRowFromItem(item);
}
/** {@inheritDoc} */
@Override
protected ColumnViewerEditor createViewerEditor() {
return new GridViewerEditor(this, new ColumnViewerEditorActivationStrategy(this), ColumnViewerEditor.DEFAULT);
}
/** {@inheritDoc} */
@Override
protected void doClear(int index) {
grid.getDataVisualizer().clearRow(grid.getItem(index));
}
/** {@inheritDoc} */
@Override
protected void doClearAll() {
grid.getDataVisualizer().clearAll();
}
/**
* @see org.eclipse.jface.viewers.StructuredViewer#refresh()
*/
@Override
public void refresh() {
try {
super.refresh();
} finally {
grid.refreshData();
}
}
/** {@inheritDoc} */
@Override
protected void doSetItemCount(int count) {
grid.setItemCount(count);
}
/** {@inheritDoc} */
@Override
protected void doDeselectAll() {
grid.deselectAll();
}
/** {@inheritDoc} */
@Override
protected Widget doGetColumn(int index) {
return grid.getColumn(index);
}
/** {@inheritDoc} */
@Override
protected int doGetColumnCount() {
return grid.getColumnCount();
}
/** {@inheritDoc} */
@Override
protected Item doGetItem(int index) {
return grid.getItem(index);
}
/** {@inheritDoc} */
@Override
protected int doGetItemCount() {
return grid.getItemCount();
}
/** {@inheritDoc} */
@Override
protected Item[] doGetItems() {
return grid.getItems();
}
/** {@inheritDoc} */
@Override
protected Item[] doGetSelection() {
return grid.getSelection();
}
/** {@inheritDoc} */
@Override
protected int[] doGetSelectionIndices() {
return grid.getSelectionIndices();
}
/** {@inheritDoc} */
@Override
protected int doIndexOf(Item item) {
return ((GridItem) item).getRowIndex();
}
/** {@inheritDoc} */
@Override
protected void doRemove(int[] indices) {
grid.remove(indices);
}
/** {@inheritDoc} */
@Override
protected void doRemove(int start, int end) {
grid.remove(start, end);
}
/** {@inheritDoc} */
@SuppressWarnings("deprecation")
@Override
protected void doRemoveAll() {
grid.removeAll();
}
/**
* (non-Javadoc)
*
* @see org.eclipse.jface.viewers.AbstractTableViewer#handleDispose(org.eclipse.swt.events.DisposeEvent)
* fix crossed reference for GC
*/
@Override
protected void handleDispose(final DisposeEvent event) {
super.handleDispose(event);
cachedRow = null;
rowHeaderLabelProvider = null;
getGrid().setRedraw(false);
getGrid().disposeAllItems();
getGrid().clearItems();
}
/** {@inheritDoc} */
@Override
protected void doSetSelection(Item[] items) {
GridItem[] items2 = new GridItem[items.length];
for (int i = 0; i < items.length; i++) {
items2[i] = (GridItem) items[i];
}
grid.setSelection(items2);
grid.showSelection();
}
/** {@inheritDoc} */
@Override
protected void doSetSelection(int[] indices) {
grid.setSelection(indices);
}
/** {@inheritDoc} */
@Override
protected void doShowItem(Item item) {
grid.showItem((GridItem) item);
}
/** {@inheritDoc} */
@Override
protected void doShowSelection() {
grid.showSelection();
}
/** {@inheritDoc} */
@Override
protected Item getItemAt(Point point) {
return grid.getItem(point);
}
/** {@inheritDoc} */
@Override
public Control getControl() {
return grid;
}
/** {@inheritDoc} */
@Override
protected ViewerRow getViewerRowFromItem(Widget item) {
if (cachedRow == null) {
cachedRow = new GridViewerRow((GridItem) item);
} else {
cachedRow.setItem((GridItem) item);
}
return cachedRow;
}
/**
* {@inheritDoc}
*/
@Override
protected void doResetItem(Item item) {
GridItem gridItem = (GridItem) item;
int columnCount = Math.max(1, grid.getColumnCount());
for (int i = 0; i < columnCount; i++) {
gridItem.setText(i, ""); //$NON-NLS-1$
gridItem.setImage(null);
}
}
/**
* {@inheritDoc}
*/
@Override
protected void doSelect(int[] indices) {
grid.select(indices);
}
/**
* When set to true, this grid viewer will ensure that each of the grid's
* items is always automatically sized to its preferred height. The default
* is false.
* <p>
* Since this mechanism usually leads to a grid with rows of different
* heights and thus to a grid with decreased performance, it should only be
* applied if that is intended. To set the height of all items to a specific
* value, use {@link Grid#setItemHeight(int)} instead.
* <p>
* When a column with activated word wrapping is resized by dragging the
* column resizer, the items are only auto-resized properly if you use
* {@link GridViewerColumn} to create the columns.
* <p>
* When this method is called, existing rows are not resized to their
* preferred height. Therefore it is suggested that this method be called
* before rows are populated (i.e. before setInput).
*
* @param autoPreferredHeight
*/
public void setAutoPreferredHeight(boolean autoPreferredHeight) {
this.autoPreferredHeight = autoPreferredHeight;
}
/**
* @return true if this grid viewer sizes its rows to their preferred height
* @see #setAutoPreferredHeight(boolean)
*/
public boolean getAutoPreferredHeight() {
return autoPreferredHeight;
}
/** {@inheritDoc} */
@Override
protected void doUpdateItem(Widget widget, Object element, boolean fullMap) {
super.doUpdateItem(widget, element, fullMap);
updateRowHeader(widget);
if (autoPreferredHeight && !widget.isDisposed())
((GridItem) widget).pack();
}
private void updateRowHeader(Widget widget) {
if (rowHeaderLabelProvider != null) {
ViewerCell cell = getViewerRowFromItem(widget).getCell(Integer.MAX_VALUE);
rowHeaderLabelProvider.update(cell);
}
}
/**
* Label provider used by calculate the row header text
*
* @param rowHeaderLabelProvider
* the provider
*/
public void setRowHeaderLabelProvider(CellLabelProvider rowHeaderLabelProvider) {
this.rowHeaderLabelProvider = rowHeaderLabelProvider;
}
/**
* Refresh row headers only
*
* @param element
* the element to start or <code>null</code> if all rows should
* be refreshed
*/
public void refreshRowHeaders(Object element) {
boolean refresh = element == null;
for (int i = 0; i < getGrid().getItemCount(); i++) {
if (refresh || element.equals(getGrid().getItem(i).getData())) {
refresh = true;
updateRowHeader(getGrid().getItem(i));
}
}
}
/**
* {@inheritDoc}
*/
@Override
public void editElement(Object element, int column) {
try {
getControl().setRedraw(false);
Widget item = findItem(element);
if (item != null) {
ViewerRow row = getViewerRowFromItem(item);
if (row != null) {
ViewerCell cell = row.getCell(column);
if (cell != null) {
triggerEditorActivationEvent(new ColumnViewerEditorActivationEvent(cell));
}
}
}
} finally {
getControl().setRedraw(true);
}
// }
}
/**
* {@inheritDoc}
*/
@SuppressWarnings({ "rawtypes", "unchecked" })
@Override
protected void setSelectionToWidget(ISelection selection, boolean reveal) {
if (!grid.isCellSelectionEnabled() || !(selection instanceof CellSelection)) {
super.setSelectionToWidget(selection, reveal);
if (selection instanceof SelectionWithFocusRow) {
Object el = ((SelectionWithFocusRow) selection).getFocusElement();
if (el != null) {
for (int i = 0; i < grid.getItemCount(); i++) {
GridItem item = grid.getItem(i);
if (item.getData() == el || el.equals(item.getData())
|| (getComparer() != null && getComparer().equals(item.getData(), el))) {
grid.setFocusItem(item);
break;
}
}
}
}
} else {
CellSelection cellSelection = (CellSelection) selection;
List l = cellSelection.toList();
ArrayList pts = new ArrayList();
for (int i = 0; i < grid.getItemCount(); i++) {
Iterator it = l.iterator();
Object itemObject = grid.getItem(i).getData();
while (it.hasNext()) {
Object checkObject = it.next();
if (itemObject == checkObject
|| (getComparer() != null && getComparer().equals(itemObject, checkObject))) {
Iterator idxIt = cellSelection.getIndices(checkObject).iterator();
while (idxIt.hasNext()) {
Integer idx = (Integer) idxIt.next();
pts.add(new Point(idx.intValue(), i));
}
}
}
}
Point[] tmp = new Point[pts.size()];
pts.toArray(tmp);
grid.setCellSelection(tmp);
if (cellSelection.getFocusElement() != null) {
Object el = cellSelection.getFocusElement();
for (int i = 0; i < grid.getItemCount(); i++) {
GridItem item = grid.getItem(i);
if (item.getData() == el || item.getData().equals(el)
|| (getComparer() != null && getComparer().equals(item.getData(), el))) {
grid.setFocusItem(item);
break;
}
}
}
}
}
/**
* {@inheritDoc}
*/
@Override
public ISelection getSelection() {
if (!grid.isCellSelectionEnabled()) {
IStructuredSelection selection = (IStructuredSelection) super.getSelection();
Object el = null;
if (grid.getFocusItem() != null) {
el = grid.getFocusItem().getData();
}
return new SelectionWithFocusRow(selection.toList(), el, getComparer());
} else {
return createCellSelection();
}
}
@SuppressWarnings({ "unchecked", "rawtypes" })
private CellSelection createCellSelection() {
Point[] ps = grid.getCellSelection();
Arrays.sort(ps, new Comparator() {
@Override
public int compare(Object arg0, Object arg1) {
Point a = (Point) arg0;
Point b = (Point) arg1;
int rv = a.y - b.y;
if (rv == 0) {
rv = a.x - b.x;
}
return rv;
}
});
ArrayList objectList = new ArrayList();
ArrayList indiceLists = new ArrayList();
ArrayList indiceList = new ArrayList();
int curLine = -1;
for (int i = 0; i < ps.length; i++) {
if (curLine != ps[i].y) {
curLine = ps[i].y;
indiceList = new ArrayList();
indiceLists.add(indiceList);
objectList.add(grid.getItem(curLine).getData());
}
indiceList.add(new Integer(ps[i].x));
}
Object focusElement = null;
if (grid.getFocusItem() != null && !grid.getFocusItem().isDisposed()) {
focusElement = grid.getFocusItem().getData();
}
return new CellSelection(objectList, indiceLists, focusElement, getComparer());
}
}