Drag and drop to move image (Smart GWT)
/*
* SmartGWT (GWT for SmartClient)
* Copyright 2008 and beyond, Isomorphic Software, Inc.
*
* SmartGWT is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License version 3
* as published by the Free Software Foundation. SmartGWT is also
* available under typical commercial license terms - see
* http://smartclient.com/license
* 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 com.smartgwt.sample.showcase.client;
import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.user.client.ui.RootPanel;
import com.smartgwt.client.types.Alignment;
import com.smartgwt.client.types.DragAppearance;
import com.smartgwt.client.widgets.Canvas;
import com.smartgwt.client.widgets.Img;
import com.smartgwt.client.widgets.layout.HStack;
import com.smartgwt.client.widgets.layout.VStack;
public class Showcase implements EntryPoint {
public void onModuleLoad() {
RootPanel.get().add(getViewPanel());
}
public Canvas getViewPanel() {
HStack hStack = new HStack(10);
hStack.setLayoutMargin(10);
hStack.setLeft(120);
hStack.setShowEdges(true);
hStack.setEdgeImage("edges/blue/6.png");
hStack.setCanAcceptDrop(true);
hStack.setAnimateMembers(true);
hStack.setShowDragPlaceHolder(true);
hStack.setBorder("1px solid #4040ff");
hStack.addMember(new DragPiece("cube_blue.png"));
hStack.addMember(new DragPiece("cube_green.png"));
hStack.addMember(new DragPiece("cube_yellow.png"));
VStack vStack = new VStack(10);
vStack.setLayoutMargin(10);
vStack.setShowEdges(true);
vStack.setEdgeImage("edges/green/6.png");
vStack.setCanAcceptDrop(true);
vStack.setAnimateMembers(true);
vStack.setDropLineThickness(4);
Canvas dropLineProp = new Canvas();
dropLineProp.setBackgroundColor("#40c040");
vStack.setDropLineProperties(dropLineProp);
vStack.addMember(new DragPiece("cube_blue.png"));
vStack.addMember(new DragPiece("cube_green.png"));
vStack.addMember(new DragPiece("cube_yellow.png"));
Canvas main = new Canvas();
main.addChild(hStack);
main.addChild(vStack);
return main;
}
private class DragPiece extends Img {
public DragPiece() {
setWidth(48);
setHeight(48);
setLayoutAlign(Alignment.CENTER);
setCanDragReposition(true);
setCanDrop(true);
setDragAppearance(DragAppearance.TARGET);
setAppImgDir("pieces/48/");
}
public DragPiece(String src) {
this();
setSrc(src);
}
}
}
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