org.eclipse.papyrus.infra.gmfdiag.dnd.preferences.DropStrategyLabelProvider.java Source code

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Here is the source code for org.eclipse.papyrus.infra.gmfdiag.dnd.preferences.DropStrategyLabelProvider.java

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/*****************************************************************************
 * Copyright (c) 2012 CEA LIST.
 * 
 * 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:
 *  Camille Letavernier (CEA LIST) camille.letavernier@cea.fr - Initial API and implementation
 *****************************************************************************/
package org.eclipse.papyrus.infra.gmfdiag.dnd.preferences;

import org.eclipse.jface.viewers.ColumnLabelProvider;
import org.eclipse.jface.viewers.ViewerCell;
import org.eclipse.papyrus.infra.gmfdiag.dnd.policy.DropStrategyManager;
import org.eclipse.papyrus.infra.gmfdiag.dnd.strategy.DropStrategy;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.Display;

/**
 * A LabelProvider for DropStrategy
 * 
 * @author Camille Letavernier
 */
public class DropStrategyLabelProvider extends ColumnLabelProvider {

    @Override
    public String getText(Object element) {
        if (element instanceof DropStrategy) {
            return ((DropStrategy) element).getLabel();
        }
        return super.getText(element);
    }

    @Override
    public Image getImage(Object element) {
        if (element instanceof DropStrategy) {
            return ((DropStrategy) element).getImage();
        }
        return super.getImage(element);
    }

    @Override
    public String getToolTipText(Object element) {
        if (element instanceof DropStrategy) {
            return ((DropStrategy) element).getDescription();
        }
        return null;
    }

    @Override
    public void update(ViewerCell cell) {
        Object element = cell.getElement();

        if (element instanceof DropStrategy) {
            DropStrategy strategy = (DropStrategy) element;
            if (cell.getColumnIndex() == DropStrategyEditor.LABEL_COLUMN) {
                cell.setImage(strategy.getImage());

                int foreground;

                if (DropStrategyManager.instance.isActive(strategy)) {
                    foreground = SWT.COLOR_BLACK;
                } else {
                    foreground = SWT.COLOR_GRAY;
                }
                cell.setForeground(Display.getCurrent().getSystemColor(foreground));
                cell.setText(strategy.getLabel());
            }
        }
    }
}