org.polymap.p4.imports.labels.AbstractShapeImportCellLabelProvider.java Source code

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Here is the source code for org.polymap.p4.imports.labels.AbstractShapeImportCellLabelProvider.java

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/*
 * polymap.org 
 * Copyright (C) 2015 individual contributors as indicated by the @authors tag. 
 * All rights reserved.
 * 
 * This is free software; you can redistribute it and/or modify it under the terms of
 * the GNU Lesser General Public License as published by the Free Software
 * Foundation; either version 3 of the License, or (at your option) any later
 * version.
 * 
 * This software 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 Lesser General Public License for more details.
 */
package org.polymap.p4.imports.labels;

import org.eclipse.jface.viewers.CellLabelProvider;
import org.eclipse.jface.viewers.ViewerCell;
import org.eclipse.jface.viewers.ViewerRow;
import org.eclipse.rap.rwt.RWT;
import org.eclipse.swt.widgets.TreeItem;

/**
 * 
 * @author Joerg Reichert <joerg@mapzone.io>
 */
public abstract class AbstractShapeImportCellLabelProvider extends CellLabelProvider {

    private static final String CSS_FIRST_ROW = "firstRow";

    protected void handleBackgroundColor(ViewerCell cell) {
        String data;
        if (isCellExpanded(cell)) {
            data = CSS_FIRST_ROW;
        } else {
            data = null;
        }
        setCellData(cell, RWT.CUSTOM_VARIANT, data);
    }

    protected void setCellData(ViewerCell cell, String key, String data) {
        ViewerRow row = cell.getViewerRow();
        ((TreeItem) row.getItem()).setData(key, data);
    }

    protected boolean isCellExpanded(ViewerCell cell) {
        TreeItem treeItem = getTreeItem(cell);
        return treeItem.getExpanded();
    }

    protected TreeItem getTreeItem(ViewerCell cell) {
        return (TreeItem) cell.getViewerRow().getItem();
    }
}