com.rcpcompany.uibindings.internal.FocusCellUIPainterHighlighter.java Source code

Introduction

Here is the source code for com.rcpcompany.uibindings.internal.FocusCellUIPainterHighlighter.java

Source

/*******************************************************************************
 * Copyright (c) 2006-2013 The RCP Company 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:
 *     The RCP Company - initial API and implementation
 *******************************************************************************/
package com.rcpcompany.uibindings.internal;

import org.eclipse.jface.viewers.ColumnViewer;
import org.eclipse.jface.viewers.FocusCellHighlighter;
import org.eclipse.jface.viewers.TreeViewerFocusCellManager;
import org.eclipse.jface.viewers.ViewerCell;
import org.eclipse.swt.graphics.Rectangle;

/**
 * Implementation of {@link FocusCellHighlighter} that delegates the real "painting" of cells to.
 */
public class FocusCellUIPainterHighlighter extends FocusCellHighlighter {
    /**
     * Create a new instance which can be passed to a {@link TreeViewerFocusCellManager}.
     * 
     * @param viewer the viewer
     */
    public FocusCellUIPainterHighlighter(ColumnViewer viewer) {
        super(viewer);
    }

    @Override
    protected void focusCellChanged(ViewerCell newCell, ViewerCell oldCell) {
        super.focusCellChanged(newCell, oldCell);

        // Redraw new area
        if (newCell != null) {
            final Rectangle rect = newCell.getBounds();
            final int x = newCell.getColumnIndex() == 0 ? 0 : rect.x;
            final int width = newCell.getColumnIndex() == 0 ? rect.x + rect.width : rect.width;
            // 1 is a fix for Linux-GTK
            newCell.getControl().redraw(x, rect.y - 1, width, rect.height + 1, true);
        }

        if (oldCell != null) {
            final Rectangle rect = oldCell.getBounds();
            final int x = oldCell.getColumnIndex() == 0 ? 0 : rect.x;
            final int width = oldCell.getColumnIndex() == 0 ? rect.x + rect.width : rect.width;
            // 1 is a fix for Linux-GTK
            oldCell.getControl().redraw(x, rect.y - 1, width, rect.height + 1, true);
        }
    }
}