/*
* Created on Oct 21, 2008
* Created by Paul Gardner
*
* Copyright 2008 Vuze, Inc. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License only.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
*/
package org.gudy.azureus2.ui.swt.components;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableItem;
public class
CustomTableTooltipHandler
implements Listener
{
Shell toolTipShell = null;
Shell mainShell = null;
Label toolTipLabel = null;
private final Table table;
/**
* Initialize
*/
public CustomTableTooltipHandler(
Table _table)
{
table = _table;
mainShell = table.getShell();
table.addListener(SWT.Dispose, this);
table.addListener(SWT.KeyDown, this);
table.addListener(SWT.MouseMove, this);
table.addListener(SWT.MouseHover, this);
mainShell.addListener(SWT.Deactivate, this);
table.addListener(SWT.Deactivate, this);
table.setToolTipText( "" ); // disable native tooltip
}
public void handleEvent(Event event) {
switch (event.type) {
case SWT.MouseHover: {
if (toolTipShell != null && !toolTipShell.isDisposed())
toolTipShell.dispose();
TableItem item = table.getItem( new Point( event.x, event.y ));
if (item == null)
return;
Object oToolTip = item.getData( "tooltip" );
if ( oToolTip == null ){
oToolTip = item.getText(0);
}
// TODO: support composite, image, etc
if (oToolTip == null || !(oToolTip instanceof String))
return;
String sToolTip = (String) oToolTip;
Display d = table.getDisplay();
if (d == null)
return;
// We don't get mouse down notifications on trim or borders..
toolTipShell = new Shell(table.getShell(), SWT.ON_TOP);
FillLayout f = new FillLayout();
try {
f.marginWidth = 3;
f.marginHeight = 1;
} catch (NoSuchFieldError e) {
/* Ignore for Pre 3.0 SWT.. */
}
toolTipShell.setLayout(f);
toolTipShell.setBackground(d.getSystemColor(SWT.COLOR_INFO_BACKGROUND));
toolTipLabel = new Label(toolTipShell, SWT.WRAP);
toolTipLabel.setForeground(d.getSystemColor(SWT.COLOR_INFO_FOREGROUND));
toolTipLabel.setBackground(d.getSystemColor(SWT.COLOR_INFO_BACKGROUND));
//toolTipShell.setData("TableCellSWT", item);
toolTipLabel.setText(sToolTip.replaceAll("&", "&&"));
// compute size on label instead of shell because label
// calculates wrap, while shell doesn't
Point size = toolTipLabel.computeSize(SWT.DEFAULT, SWT.DEFAULT);
if (size.x > 600) {
size = toolTipLabel.computeSize(600, SWT.DEFAULT, true);
}
size.x += toolTipShell.getBorderWidth() * 2 + 2;
size.y += toolTipShell.getBorderWidth() * 2;
try {
size.x += toolTipShell.getBorderWidth() * 2 + (f.marginWidth * 2);
size.y += toolTipShell.getBorderWidth() * 2 + (f.marginHeight * 2);
} catch (NoSuchFieldError e) {
/* Ignore for Pre 3.0 SWT.. */
}
Point pt = table.toDisplay(event.x, event.y);
Rectangle displayRect;
try {
displayRect = table.getMonitor().getClientArea();
} catch (NoSuchMethodError e) {
displayRect = table.getDisplay().getClientArea();
}
if (pt.x + size.x > displayRect.x + displayRect.width) {
pt.x = displayRect.x + displayRect.width - size.x;
}
if (pt.y + size.y > displayRect.y + displayRect.height) {
pt.y -= size.y + 2;
} else {
pt.y += 21;
}
if (pt.y < displayRect.y)
pt.y = displayRect.y;
toolTipShell.setBounds(pt.x, pt.y, size.x, size.y);
toolTipShell.setVisible(true);
break;
}
case SWT.Dispose:
if (mainShell != null && !mainShell.isDisposed())
mainShell.removeListener(SWT.Deactivate, this);
if (table != null && !table.isDisposed())
mainShell.removeListener(SWT.Deactivate, this);
// fall through
default:
if (toolTipShell != null) {
toolTipShell.dispose();
toolTipShell = null;
toolTipLabel = null;
}
break;
} // switch
} // handlEvent()
}