/*----------------    FILE HEADER ---------------------------------------
 This file is part of Geoide.
 Copyright (C) 2005-2006 by:
 IDgis B.V.
 http://www.idgis.nl

 This library 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 2.1 of the License, or (at your option) any later version.

 This library 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.

 You should have received a copy of the GNU Lesser General Public
 License along with this library; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA

 Contact:

 Herman Assink
 IDgis bv
 P.O. Box 15
 7450 AA Holten
 The Netherlands
 E-Mail: herman.assink@idgis.nl

 * @version 1.4.0
 * @author IDgis team
 * 
 ------------------------------------------------------------------------*/
import nl.idgis.giclient.gis.Feature;
import nl.idgis.giclient.gis.Layer;
import nl.idgis.giclient.util.SynchListener;

class nl.idgis.giclient.gis.LayerSession {

    private var layer:Layer = null;
    private var synchListener:SynchListener = null;

    private var filteredChanged:Boolean = false;
    private var selectedChanged:Boolean = false;
    private var subSelectedChanged:Boolean = false;
    private var currentChanged:Boolean = false;
    private var requestingFeatures:Array = null;

    function LayerSession(layer:Layer, synchListener:SynchListener) {
        this.layer = layer;
        this.synchListener = synchListener;
        requestingFeatures = new Array();
    }

    function setFilteredChanged(filteredChanged:Boolean):Void {
        this.filteredChanged = filteredChanged;
    }

    function setSelectedChanged(selectedChanged:Boolean):Void {
        this.selectedChanged = selectedChanged;
    }

    function setSubSelectedChanged(subSelectedChanged:Boolean):Void {
        this.subSelectedChanged = subSelectedChanged;
    }

    function setCurrentChanged(currentChanged:Boolean):Void {
        this.currentChanged = currentChanged;
    }

    function addRequestingFeature(feature:Feature):Void {
        requestingFeatures.push(feature);
    }

    function removeRequestingFeature(feature:Feature):Void {
        for (var i:Number = 0; i < requestingFeatures.length; i++) {
            if (requestingFeatures[i] == feature) {
                requestingFeatures.splice(i, 1);
                return;
            }
        }
    }

    function getNumRequestingFeatures():Number {
        return requestingFeatures.length;
    }

    function flush():Void {
        if (synchListener != null) {
            synchListener.onSynch(layer, "SELECTION"); // Only the action SELECT currently works with synch listeners.
        }

        if (filteredChanged) {
            layer.layerEventDispatcher.changeFilteredFeatures(layer);
        }
        if ((selectedChanged) || (subSelectedChanged) || (currentChanged)) {
            //trace("LayerSession.flush, changeSelectedFeatures: " + layer.getName() + ";" + selectedChanged + ";" + subSelectedChanged + ";" + currentChanged);
            layer.layerEventDispatcher.changeSelectedFeatures(layer, selectedChanged,
                                                             subSelectedChanged, currentChanged);
        }
    }

}