Draggable 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.widgets.Canvas;
import com.smartgwt.client.widgets.Img;
import com.smartgwt.client.widgets.events.ClickEvent;
import com.smartgwt.client.widgets.events.ClickHandler;
import com.smartgwt.client.widgets.events.MouseStillDownEvent;
import com.smartgwt.client.widgets.events.MouseStillDownHandler;
import com.smartgwt.client.widgets.layout.HLayout;
import com.smartgwt.client.widgets.layout.VLayout;
public class Showcase implements EntryPoint{
public void onModuleLoad() {
RootPanel.get().add(getViewPanel());
}
public Canvas getViewPanel() {
VLayout layout = new VLayout();
layout.setMembersMargin(10);
layout.setAutoHeight();
HLayout hLayout = new HLayout();
final Img vanImg = new Img("crystal/128/apps/virussafe.png", 96, 96);
vanImg.setCanDragReposition(true);
vanImg.setTop(0);
vanImg.setLeft(50);
Img resetImg = new Img("icons/48/reset.png", 48, 48);
resetImg.addClickHandler(new ClickHandler() {
public void onClick(ClickEvent event) {
vanImg.moveTo(50, 0);
}
});
Img moveImg = new Img("icons/48/downright.png", 48, 48);
moveImg.setShowRollOver(true);
moveImg.addMouseStillDownHandler(new MouseStillDownHandler() {
public void onMouseStillDown(MouseStillDownEvent event) {
vanImg.moveBy(20, 20);
}
});
hLayout.addMember(resetImg);
hLayout.addMember(moveImg);
//were positioning the vanImg using absolute poitioning relative to its containing canvas
Canvas vanCanvas = new Canvas();
vanCanvas.addChild(vanImg);
layout.addMember(hLayout);
layout.addMember(vanCanvas);
return layout;
}
}
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