package de.intevation.flys.client.client.ui;

import com.smartgwt.client.widgets.Canvas;

import java.util.ArrayList;
import java.util.List;


/**
 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
 */
public class FLYSWorkspace extends Canvas {

    /** The maximal number of windows that fit into the browser view when an
     * offset is used to move windows initially.*/
    public static int MAX_WINDOWS = 10;

    /** The number of pixels used to move windows.*/
    public static int WINDOW_OFFSET = 20;


    /** A map that contains the open CollectionViews. */
    protected List<CollectionView> views;


    /**
     * The default constructor creates an empty FLYSWorkspace with no
     * CollectionViews opened.
     */
    public FLYSWorkspace() {
        views = new ArrayList<CollectionView>();
    }


    /**
     * This method adds a new CollectionView to this workspace and stores a
     * reference in {@link views}.
     *
     * @param collectionView A new CollectionView.
     */
    public void addView(CollectionView collectionView) {
        int num    = views != null ? views.size() : 0;
        int factor = num % MAX_WINDOWS;

        collectionView.moveTo(factor * WINDOW_OFFSET, factor * WINDOW_OFFSET);

        views.add(collectionView);
        addChild(collectionView);
    }
}
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