/**
*
* geo-platform
* Rich webgis framework
* http://geo-platform.org
* ====================================================================
*
* Copyright (C) 2008-2017 geoSDI Group (CNR IMAA - Potenza - ITALY).
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version. This program 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 General Public License
* for more details. You should have received a copy of the GNU General
* Public License along with this program. If not, see http://www.gnu.org/licenses/
*
* ====================================================================
*
* Linking this library statically or dynamically with other modules is
* making a combined work based on this library. Thus, the terms and
* conditions of the GNU General Public License cover the whole combination.
*
* As a special exception, the copyright holders of this library give you permission
* to link this library with independent modules to produce an executable, regardless
* of the license terms of these independent modules, and to copy and distribute
* the resulting executable under terms of your choice, provided that you also meet,
* for each linked independent module, the terms and conditions of the license of
* that module. An independent module is a module which is not derived from or
* based on this library. If you modify this library, you may extend this exception
* to your version of the library, but you are not obligated to do so. If you do not
* wish to do so, delete this exception statement from your version.
*/
package org.geosdi.geoplatform.gui.client.listener;
import com.extjs.gxt.ui.client.event.EventType;
import org.geosdi.geoplatform.gui.client.model.visitor.VisitorPosition;
import org.geosdi.geoplatform.gui.model.tree.GPBeanTreeModel;
import com.extjs.gxt.ui.client.event.Listener;
import com.extjs.gxt.ui.client.store.Store;
import com.extjs.gxt.ui.client.store.TreeStore;
import com.extjs.gxt.ui.client.store.TreeStoreEvent;
import org.geosdi.geoplatform.gui.action.ISave;
import org.geosdi.geoplatform.gui.client.command.memento.dnd.chain.GPSaveTreeElementManager;
import org.geosdi.geoplatform.gui.client.command.memento.dnd.chain.SaveTreeElementManager;
import org.geosdi.geoplatform.gui.client.config.MementoModuleInjector;
import org.geosdi.geoplatform.gui.model.tree.LayerEvents;
import org.geosdi.geoplatform.gui.client.model.FolderTreeNode;
import org.geosdi.geoplatform.gui.client.model.memento.save.bean.MementoSaveDragDrop;
import org.geosdi.geoplatform.gui.client.model.memento.save.IMementoSave;
import org.geosdi.geoplatform.gui.client.model.visitor.VisitorDisplayHide;
public class GPDNDListener implements Listener<TreeStoreEvent<GPBeanTreeModel>>,
ISave<MementoSaveDragDrop> {
private VisitorDisplayHide checkerVisitor;
private VisitorPosition visitor = new VisitorPosition();
private GPBeanTreeModel changedElement;
private GPBeanTreeModel parentDestination;
private int newIndex;
private boolean isActiveDrop = false;
private boolean isFolderDrop = false;
private GPSaveTreeElementManager saveTreeElement = new SaveTreeElementManager();
public GPDNDListener(VisitorDisplayHide visitorDisplayHide) {
this.checkerVisitor = visitorDisplayHide;
}
/*We need to manager three kinds of DND Events:
* LayerEvents.GP_DRAG_START
* LayerEvents.GP_DRAG_LOST
* LayerEvents.GP_DROP
* and the Store.Add event, in this way we can manage the visit on tree
*/
@SuppressWarnings("unchecked")
@Override
public void handleEvent(TreeStoreEvent<GPBeanTreeModel> be) {
this.manageDropActivation(be.getType());
if (be.getParent() != null && Store.Add.equals(be.getType()) && this.isFolderDrop == false) {
TreeStore<GPBeanTreeModel> treeStore = (TreeStore<GPBeanTreeModel>) be.getSource();
this.parentDestination = be.getParent();
this.newIndex = be.getIndex();
this.changedElement = treeStore.getChild(parentDestination, newIndex);
if (this.changedElement instanceof FolderTreeNode) {
this.isFolderDrop = true;
}
} else if (this.isActiveDrop && LayerEvents.GP_DROP.equals(be.getType())) {
this.visitor.fixPosition(changedElement, parentDestination, newIndex);
MementoSaveDragDrop mementoSaveDND = new MementoSaveDragDrop(this);
mementoSaveDND.setRefBaseElement(changedElement);
mementoSaveDND.setNewZIndex(changedElement.getzIndex());
mementoSaveDND.setRefNewParent(
(parentDestination instanceof FolderTreeNode)
? (FolderTreeNode) parentDestination : null);
mementoSaveDND.setDescendantMap(
this.visitor.getFolderDescendantMap());
IMementoSave mementoSave = MementoModuleInjector.MainInjector.getInstance().getMementoSave();
mementoSave.add(mementoSaveDND);
this.isActiveDrop = false;
this.isFolderDrop = false;
this.checkerVisitor.realignViewState(changedElement);
}
}
private void manageDropActivation(EventType eventType) {
if (LayerEvents.GP_DRAG_START.equals(eventType)) {
this.isActiveDrop = true;
this.isFolderDrop = false;
} else if (LayerEvents.GP_DRAG_LOST.equals(eventType)) {
this.isActiveDrop = false;
}
}
@Override
public void executeSave(final MementoSaveDragDrop memento) {
this.saveTreeElement.bind(memento);
}
}