Esempio drag&drop [wicket dnd][sc]
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This document provides code samples for implementing drag-and-drop functionality in a Wicket application using the wicket-dnd library. It includes the HTML and Java code for a simple page with two labels that can be dragged and dropped within a container component. The code adds DragSource and DropTarget behaviors to the container to enable dragging and dropping of the label components. It also defines handlers for drag and drop events.
![DRAG&DROP CON WICKET DnD [Santi Caltabiano]
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Libreria: wicket-dnd
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- https://code.google.com/p/wicket-dnd/
Wicket DnD per wicket 1.5 e 1.6
- https://github.com/svenmeier/wicket-dnd
Wicket DnD per wicket 1.7
> https://github.com/svenmeier/wicket-dnd
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HTML: Homepage.html
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<?xml version="1.0" encoding="UTF-8"?>
<html>
<head>
<title>osanet</title>
</head>
<body>
<wicket:extend>
<table wicket:id="container01" style="background: red;">
<tr style="background: green;">
<td><span wicket:id="label01">CCC</span></td>
</tr>
<tr>
<td>BBBB</td>
</tr>
<tr style="background: yellow;">
<td><span wicket:id="label02">CCC</span></td>
</tr>
</table>
</wicket:extend>
</body>
</html>
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Homepage.java
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/*
* HomePage.java
*
* Created on 3 settembre 2008, 14.46
*/](https://image.slidesharecdn.com/esempiodragdropwicket-dndsc-150418133221-conversion-gate02/85/Esempio-drag-drop-wicket-dnd-sc-1-320.jpg)
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Esempio drag&drop [wicket dnd][sc]
- 1. DRAG&DROP CON WICKET DnD [Santi Caltabiano] -------------------------------------------------------------------------------- -------------------------------------------------- Libreria: wicket-dnd -------------------------------------------------------------------------------- -------------------------------------------------- - https://code.google.com/p/wicket-dnd/ Wicket DnD per wicket 1.5 e 1.6 - https://github.com/svenmeier/wicket-dnd Wicket DnD per wicket 1.7 > https://github.com/svenmeier/wicket-dnd -------------------------------------------------------------------------------- -------------------------------------------------- HTML: Homepage.html -------------------------------------------------------------------------------- -------------------------------------------------- <?xml version="1.0" encoding="UTF-8"?> <html> <head> <title>osanet</title> </head> <body> <wicket:extend> <table wicket:id="container01" style="background: red;"> <tr style="background: green;"> <td><span wicket:id="label01">CCC</span></td> </tr> <tr> <td>BBBB</td> </tr> <tr style="background: yellow;"> <td><span wicket:id="label02">CCC</span></td> </tr> </table> </wicket:extend> </body> </html> -------------------------------------------------------------------------------- -------------------------------------------------- Homepage.java -------------------------------------------------------------------------------- -------------------------------------------------- /* * HomePage.java * * Created on 3 settembre 2008, 14.46 */
- 2. package com.osanet.pages.secured; import com.osanet.application.annotations.SecuredPage; import com.osanet.pages.templates.TemplatePageWithMenubar; import static com.osanet.application.log.Log.appLog; import com.osanet.application.log.Log; import com.osanet.components.Label; import org.apache.wicket.Component; import org.apache.wicket.ajax.AjaxRequestTarget; import org.apache.wicket.markup.html.WebMarkupContainer; import wicketdnd.DragSource; import wicketdnd.DropTarget; import wicketdnd.Location; import wicketdnd.Operation; import wicketdnd.Reject; import wicketdnd.Transfer; import wicketdnd.theme.HumanTheme; import wicketdnd.theme.WindowsTheme; /** * Homepage per l'utente standard * @author Santino */ @SecuredPage public class HomePage extends TemplatePageWithMenubar { private WebMarkupContainer container01; private Label label01; private Label label02; public HomePage() { // Container contenente i componenti interessati dal D&D container01=new WebMarkupContainer("container01"); container01.setOutputMarkupId(true); add(container01); // Tema per il drag&drop container01.add(new HumanTheme()); // Oggetto per la gestione dei drag. Operazioni previste: move e copy DragSource dragSource=new DragSource(Operation.MOVE, Operation.COPY){ @Override public void onAfterDrop(AjaxRequestTarget target, Transfer transfer) { System.out.println("After Drop"); } @Override public void onBeforeDrop(Component drag, Transfer transfer) throws Reject { System.out.println("Before Drop"); } }; container01.add(dragSource); // Il tag da trascinare è di tipo span dragSource.drag("span"); // Container per la gestione dei drop. Operazioni consentite: move e copy DropTarget dropTarget=new DropTarget(Operation.MOVE, Operation.COPY){
- 3. @Override public void onDrop(AjaxRequestTarget target, Transfer transfer, Location location) throws Reject { System.out.println("XXXXX03:"+location.getModel().toString()); } }; container01.add(dropTarget); // Il interessato dal drop è di tipo span dropTarget.dropCenter("span"); // Oggetto interessato dal D&D label01=new Label("label01","AAAAA"); label01.setOutputMarkupId(true); container01.add(label01); // Oggetto interessato dal D&D label02=new Label("label02","CCCCC"); label02.setOutputMarkupId(true); container01.add(label02); } }