/*******************************************************************************
* Copyright (c) 2000, 2005 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
*******************************************************************************/
package org.eclipse.gef.examples.logicdesigner.edit;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.FontData;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Text;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.viewers.CellEditor;
import org.eclipse.jface.viewers.TextCellEditor;
import org.eclipse.ui.IActionBars;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.actions.ActionFactory;
import org.eclipse.ui.part.CellEditorActionHandler;
import org.eclipse.gef.GraphicalEditPart;
import org.eclipse.gef.editparts.ZoomListener;
import org.eclipse.gef.editparts.ZoomManager;
import org.eclipse.gef.tools.CellEditorLocator;
import org.eclipse.gef.tools.DirectEditManager;
import org.eclipse.gef.examples.logicdesigner.figures.StickyNoteFigure;
public class LogicLabelEditManager
extends DirectEditManager
{
private IActionBars actionBars;
private CellEditorActionHandler actionHandler;
private IAction copy, cut, paste, undo, redo, find, selectAll, delete;
private double cachedZoom = -1.0;
private Font scaledFont;
private ZoomListener zoomListener = new ZoomListener() {
public void zoomChanged(double newZoom) {
updateScaledFont(newZoom);
}
};
public LogicLabelEditManager(GraphicalEditPart source, CellEditorLocator locator) {
super(source, null, locator);
}
/**
* @see org.eclipse.gef.tools.DirectEditManager#bringDown()
*/
protected void bringDown() {
ZoomManager zoomMgr = (ZoomManager)getEditPart().getViewer()
.getProperty(ZoomManager.class.toString());
if (zoomMgr != null)
zoomMgr.removeZoomListener(zoomListener);
if (actionHandler != null) {
actionHandler.dispose();
actionHandler = null;
}
if (actionBars != null) {
restoreSavedActions(actionBars);
actionBars.updateActionBars();
actionBars = null;
}
super.bringDown();
// dispose any scaled fonts that might have been created
disposeScaledFont();
}
protected CellEditor createCellEditorOn(Composite composite) {
return new TextCellEditor(composite, SWT.MULTI | SWT.WRAP);
}
private void disposeScaledFont() {
if (scaledFont != null) {
scaledFont.dispose();
scaledFont = null;
}
}
protected void initCellEditor() {
// update text
StickyNoteFigure stickyNote = (StickyNoteFigure)getEditPart().getFigure();
getCellEditor().setValue(stickyNote.getText());
// update font
ZoomManager zoomMgr = (ZoomManager)getEditPart().getViewer()
.getProperty(ZoomManager.class.toString());
if (zoomMgr != null) {
// this will force the font to be set
cachedZoom = -1.0;
updateScaledFont(zoomMgr.getZoom());
zoomMgr.addZoomListener(zoomListener);
} else
getCellEditor().getControl().setFont(stickyNote.getFont());
// Hook the cell editor's copy/paste actions to the actionBars so that they can
// be invoked via keyboard shortcuts.
actionBars = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage()
.getActiveEditor().getEditorSite().getActionBars();
saveCurrentActions(actionBars);
actionHandler = new CellEditorActionHandler(actionBars);
actionHandler.addCellEditor(getCellEditor());
actionBars.updateActionBars();
}
private void restoreSavedActions(IActionBars actionBars){
actionBars.setGlobalActionHandler(ActionFactory.COPY.getId(), copy);
actionBars.setGlobalActionHandler(ActionFactory.PASTE.getId(), paste);
actionBars.setGlobalActionHandler(ActionFactory.DELETE.getId(), delete);
actionBars.setGlobalActionHandler(ActionFactory.SELECT_ALL.getId(), selectAll);
actionBars.setGlobalActionHandler(ActionFactory.CUT.getId(), cut);
actionBars.setGlobalActionHandler(ActionFactory.FIND.getId(), find);
actionBars.setGlobalActionHandler(ActionFactory.UNDO.getId(), undo);
actionBars.setGlobalActionHandler(ActionFactory.REDO.getId(), redo);
}
private void saveCurrentActions(IActionBars actionBars) {
copy = actionBars.getGlobalActionHandler(ActionFactory.COPY.getId());
paste = actionBars.getGlobalActionHandler(ActionFactory.PASTE.getId());
delete = actionBars.getGlobalActionHandler(ActionFactory.DELETE.getId());
selectAll = actionBars.getGlobalActionHandler(ActionFactory.SELECT_ALL.getId());
cut = actionBars.getGlobalActionHandler(ActionFactory.CUT.getId());
find = actionBars.getGlobalActionHandler(ActionFactory.FIND.getId());
undo = actionBars.getGlobalActionHandler(ActionFactory.UNDO.getId());
redo = actionBars.getGlobalActionHandler(ActionFactory.REDO.getId());
}
private void updateScaledFont(double zoom) {
if (cachedZoom == zoom)
return;
Text text = (Text)getCellEditor().getControl();
Font font = getEditPart().getFigure().getFont();
disposeScaledFont();
cachedZoom = zoom;
if (zoom == 1.0)
text.setFont(font);
else {
FontData fd = font.getFontData()[0];
fd.setHeight((int)(fd.getHeight() * zoom));
text.setFont(scaledFont = new Font(null, fd));
}
}
}