LabelEditManager.java

/** 
 * This file is protected by Copyright. 
 * Please refer to the COPYRIGHT file distributed with this source distribution.
 * 
 * This file is part of REDHAWK IDE.
 * 
 * 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.
 *
 */
package gov.redhawk.sca.sad.diagram.palette;

import org.eclipse.gef.tools.CellEditorLocator;
import org.eclipse.gef.tools.DirectEditManager;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.viewers.CellEditor;
import org.eclipse.jface.viewers.TextCellEditor;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Text;
import org.eclipse.ui.IActionBars;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.actions.ActionFactory;
import org.eclipse.ui.part.CellEditorActionHandler;


/**
 * @since 3.2
 */
public class LabelEditManager extends DirectEditManager {

	private IActionBars actionBars;
	private CellEditorActionHandler actionHandler;
	private IAction copy, cut, paste, undo, redo, find, selectAll, delete;
	private PaletteFilter filter;

	public LabelEditManager(LabelEditPart source, CellEditorLocator locator, PaletteFilter filter) {
		super(source, null, locator);
		this.filter = filter;
	}

	/**
	 * @see org.eclipse.gef.tools.DirectEditManager#bringDown()
	 */
	protected void bringDown() {
		if (actionHandler != null) {
			actionHandler.dispose();
			actionHandler = null;
		}
		if (actionBars != null) {
			restoreSavedActions(actionBars);
			actionBars.updateActionBars();
			actionBars = null;
		}

		super.bringDown();
	}

	protected CellEditor createCellEditorOn(Composite composite) {
		final TextCellEditor retVal = new TextCellEditor(composite, SWT.SINGLE);
		retVal.getControl().setForeground(composite.getDisplay().getSystemColor(SWT.COLOR_BLACK));
		retVal.getControl().setBackground(composite.getDisplay().getSystemColor(SWT.COLOR_WHITE));
		final Text textControl = ((Text) retVal.getControl());
		textControl.addModifyListener(new ModifyListener() {

			@Override
			public void modifyText(ModifyEvent e) {
				String text = textControl.getText().trim();
				filter.setFilter(text);
			}
		});
		textControl.addSelectionListener(new SelectionAdapter() {
			@Override
			public void widgetDefaultSelected(SelectionEvent e) {
				commit();
			}
		});
		
		return retVal;
	}

	/*
	 * @see org.eclipse.gef.tools.DirectEditManager#showFeedback()
	 */
	@Override
	public void showFeedback() {
		// DO nothing
	}

	protected void initCellEditor() {
		// update text
		LabelFigure stickyNote = (LabelFigure) getEditPart().getFigure();
		String text = filter.getFilter();
		if (text == null) {
			text = "";
		}
		getCellEditor().setValue(text);
		// update font
		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());
	}

}