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/*******************************************************************************
* 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:
* [email protected] - initial API and implementation
* Tom Schindl - various significant contributions
* Mark-Oliver Reiser - support for differing row heights ; fix in bug 191216
*******************************************************************************/
package org.eclipse.nebula.jface.gridviewer;
import org.eclipse.jface.viewers.ColumnViewer;
import org.eclipse.jface.viewers.EditingSupport;
import org.eclipse.jface.viewers.ViewerColumn;
import org.eclipse.nebula.widgets.grid.Grid;
import org.eclipse.nebula.widgets.grid.GridColumn;
import org.eclipse.nebula.widgets.grid.GridItem;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
/**
* The concrete implementation of the ColumnViewer for the grid.
*/
public final class GridViewerColumn extends ViewerColumn {
/** This is either a GridTableViewer or a GridTreeViewer. */
private ColumnViewer viewer;
/** The concrete grid column that is being represented by the {@code ViewerColumn}. */
private GridColumn column;
/** Editor support for handling check events. */
private CheckEditingSupport checkEditingSupport;
/** Listener used to get informed when the colum resizes */
protected Listener columnResizeListener = null;
/**
* Create a new column in the {@link GridTableViewer}
*
* @param viewer the viewer the column belongs to
* @param style the style used to create the column for style bits see {@link GridColumn}
* @see GridColumn#GridColumn(Grid, int)
*/
public GridViewerColumn( GridTableViewer viewer, int style ) {
this( viewer, style, -1 );
}
/**
* Create a new column in the {@link GridTreeViewer}
*
* @param viewer the viewer the column belongs to
* @param style the style used to create the column for style bits see {@link GridColumn}
* @see GridColumn#GridColumn(Grid, int)
*/
public GridViewerColumn( GridTreeViewer viewer, int style ) {
this( viewer, style, -1 );
}
/**
* Create a new column in the {@link GridTableViewer}
*
* @param viewer the viewer the column belongs to
* @param style the style used to create the column for style bits see {@link GridColumn}
* @param index the index of the newly created column
* @see GridColumn#GridColumn(Grid, int, int)
*/
public GridViewerColumn( GridTableViewer viewer, int style, int index ) {
this( viewer, createColumn( ( Grid )viewer.getControl(), style, index ) );
}
/**
* Create a new column in the {@link GridTreeViewer}
*
* @param viewer the viewer the column belongs to
* @param style the style used to create the column for style bits see {@link GridColumn}
* @param index the index of the newly created column
* @see GridColumn#GridColumn(Grid, int, int)
*/
public GridViewerColumn( GridTreeViewer viewer, int style, int index ) {
this( viewer, createColumn( ( Grid )viewer.getControl(), style, index ) );
}
/**
* @param viewer the viewer the column belongs to
* @param column the column the viewer is attached to
*/
public GridViewerColumn( GridTreeViewer viewer, GridColumn column ) {
this( ( ColumnViewer )viewer, column );
}
/**
* @param viewer the viewer the column belongs to
* @param column the column the viewer is attached to
*/
public GridViewerColumn( GridTableViewer viewer, GridColumn column ) {
this( ( ColumnViewer )viewer, column );
}
GridViewerColumn( ColumnViewer viewer, GridColumn column ) {
super( viewer, column );
this.viewer = viewer;
this.column = column;
hookColumnResizeListener();
}
private static GridColumn createColumn( Grid table, int style, int index ) {
if( index >= 0 ) {
return new GridColumn( table, style, index );
}
return new GridColumn( table, style );
}
/**
* Returns the underlying column.
*
* @return the underlying Nebula column
*/
public GridColumn getColumn() {
return column;
}
/** {@inheritDoc} */
@Override
public void setEditingSupport( EditingSupport editingSupport ) {
if( editingSupport instanceof CheckEditingSupport ) {
if( checkEditingSupport == null ) {
final int colIndex = getColumn().getParent().indexOf( getColumn() );
getColumn().getParent().addListener( SWT.Selection, new Listener() {
public void handleEvent( Event event ) {
if( event.detail == SWT.CHECK && event.index == colIndex ) {
GridItem item = ( GridItem )event.item;
Object element = item.getData();
checkEditingSupport.setValue( element, new Boolean( item.getChecked( colIndex ) ) );
}
}
} );
}
checkEditingSupport = ( CheckEditingSupport )editingSupport;
} else {
super.setEditingSupport( editingSupport );
}
}
private void hookColumnResizeListener() {
if( columnResizeListener == null ) {
columnResizeListener = new Listener() {
public void handleEvent( Event event ) {
boolean autoPreferredSize = false;
if( viewer instanceof GridTableViewer ) {
autoPreferredSize = ( ( GridTableViewer )viewer ).getAutoPreferredHeight();
}
if( viewer instanceof GridTreeViewer ) {
autoPreferredSize = ( ( GridTreeViewer )viewer ).getAutoPreferredHeight();
}
if( autoPreferredSize && column.getWordWrap() ) {
Grid grid = column.getParent();
for( int cnt = 0; cnt < grid.getItemCount(); cnt++ ) {
grid.getItem( cnt ).pack();
}
grid.redraw();
}
}
};
column.addListener( SWT.Resize, columnResizeListener );
column.addListener( SWT.Hide, columnResizeListener );
column.addListener( SWT.Show, columnResizeListener );
}
}
private void unhookColumnResizeListener() {
if( columnResizeListener != null ) {
column.removeListener( SWT.Resize, columnResizeListener );
columnResizeListener = null;
}
}
/**
* {@inheritDoc}
*/
@Override
protected void handleDispose() {
unhookColumnResizeListener();
super.handleDispose();
}
}
