/* MailDragAndDropListener.java
Copyright (c) 2009 Juergen Schlierf, All Rights Reserved
This file is part of Cubusmail (http://code.google.com/p/cubusmail/).
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 3 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 Cubusmail. If not, see <http://www.gnu.org/licenses/>.
*/
package com.cubusmail.gwtui.client.panels;
import com.google.gwt.core.client.GWT;
import com.gwtext.client.data.Record;
import com.gwtext.client.dd.DragData;
import com.gwtext.client.dd.DragDrop;
import com.gwtext.client.widgets.grid.GridDragData;
import com.gwtext.client.widgets.tree.DropNodeCallback;
import com.gwtext.client.widgets.tree.TreeDragData;
import com.gwtext.client.widgets.tree.TreeNode;
import com.gwtext.client.widgets.tree.TreePanel;
import com.gwtext.client.widgets.tree.event.TreePanelListenerAdapter;
import com.cubusmail.gwtui.client.actions.ActionRegistry;
import com.cubusmail.gwtui.client.actions.folder.MoveFolderAction;
import com.cubusmail.gwtui.client.actions.message.CopyMoveMessagesAction;
import com.cubusmail.gwtui.client.model.GWTMailFolder;
import com.cubusmail.gwtui.client.model.IGWTFolder;
/**
* Manage the drag and drop Operations for moving mail foders and messages.
*
* @author Juergen Schlierf
*/
public class MailDragAndDropListener extends TreePanelListenerAdapter {
private final static String POINT_APPEND = "append";
/*
* (non-Javadoc)
*
* @seecom.gwtext.client.widgets.tree.event.TreePanelListenerAdapter#
* doBeforeNodeDrop(com.gwtext.client.widgets.tree.TreePanel,
* com.gwtext.client.widgets.tree.TreeNode, com.gwtext.client.dd.DragData,
* java.lang.String, com.gwtext.client.dd.DragDrop,
* com.gwtext.client.widgets.tree.TreeNode,
* com.gwtext.client.widgets.tree.DropNodeCallback)
*/
public boolean doBeforeNodeDrop( TreePanel treePanel, TreeNode target, DragData dragData, String point,
DragDrop source, TreeNode dropNode, DropNodeCallback dropNodeCallback ) {
try {
if ( dragData instanceof TreeDragData ) {
IGWTFolder sourceFolder = (IGWTFolder) dropNode.getUserObject();
IGWTFolder targedFolder = (IGWTFolder) target.getUserObject();
ActionRegistry.MOVE_FOLDER.get( MoveFolderAction.class ).moveFolder( sourceFolder.getId(),
targedFolder.getId() );
return true;
}
else if ( dragData instanceof GridDragData ) {
if ( POINT_APPEND.equals( point ) ) {
GWTMailFolder targetFolder = (GWTMailFolder) target.getUserObject();
long[] messageIds = getSelectedMessageIds( ((GridDragData) dragData).getSelections() );
ActionRegistry.MOVE_MESSAGES.get( CopyMoveMessagesAction.class ).copyMoveMessagesTo( targetFolder,
messageIds );
return true;
}
return false;
}
}
catch (Throwable e) {
GWT.log( e.getMessage(), e );
}
return false;
}
/*
* (non-Javadoc)
*
* @seecom.gwtext.client.widgets.tree.event.TreePanelListenerAdapter#
* onNodeDragOver(com.gwtext.client.widgets.tree.TreePanel,
* com.gwtext.client.widgets.tree.TreeNode, com.gwtext.client.dd.DragData,
* java.lang.String, com.gwtext.client.dd.DragDrop,
* com.gwtext.client.widgets.tree.TreeNode)
*/
public boolean onNodeDragOver( TreePanel treePanel, TreeNode target, DragData dragData, String point,
DragDrop source, TreeNode dropNode ) {
// is drop node allowed to move
try {
if ( dragData instanceof TreeDragData ) {
IGWTFolder sourceFolder = (IGWTFolder) dropNode.getUserObject();
IGWTFolder targedFolder = (IGWTFolder) target.getUserObject();
return POINT_APPEND.equals( point ) && allowMoving( sourceFolder, targedFolder );
}
else if ( dragData instanceof GridDragData ) {
return POINT_APPEND.equals( point );
}
}
catch (Throwable e) {
GWT.log( e.getMessage(), e );
}
return false;
}
private long[] getSelectedMessageIds( Record[] selectedMsgs ) {
if ( selectedMsgs != null && selectedMsgs.length > 0 ) {
long[] messsageIds = new long[selectedMsgs.length];
for (int i = 0; i < selectedMsgs.length; i++) {
messsageIds[i] = Long.parseLong( selectedMsgs[i].getId() );
}
return messsageIds;
}
return null;
}
/**
* @param source
* @param target
* @return
*/
private boolean allowMoving( IGWTFolder source, IGWTFolder target ) {
if ( source == null || target == null ) {
return false;
}
if ( !source.isMoveSupported() ) {
return false;
}
if ( source.getParent().getId().equals( target.getId() ) ) {
return false;
}
if ( source.getId().equals( target.getId() ) ) {
return false;
}
return true;
}
}