sábado, 8 de agosto de 2009

jQuery UI – Dialog, Mostrar un Dialog Cargando…

jQuery UI Solo En un articulo anterior comenté sobre jQuery Tools, una moderna colección de componentes de interfaces de usuarios.

Hoy pretendo hablar de otra colección jQuery UI, y en particular del control Dialog. jQuery UI es una biblioteca de componentes para jQuery, con interesantísimos efectos visuales para la creación de aplicaciones web.

jQuery UI, Dialog

Pero como siempre veamos el componente a través de un ejemplo. Imaginemos que estamos desarrollando una pagina web en la cual después de captar una ciudad de origen,  destino y una fecha, buscaremos los vuelos disponibles.

Es de suponer que el proceso de búsqueda de vuelos, tarde un poco, y por ende seria interesante mostrar una ventana modal de cargando datos…, que además de no impacientar al usuario, también nos asegura que este no haga clic más de una vez en el botón de búsqueda.

En el código de solución que está mas abajo veremos lo siguiente:

1. Lo primero será hacer referencia a la hoja de estilo css y a los js (jQuery y jQuery UI)

2. Definir el componente Dialog.

3. Definir el botón que abrirá el dialogo y el contenido a mostrar.

4. Y por ultimo la función javascript asociada al botón.

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>Página ShowDialog Cargando...</title>
    <link type="text/css" href="http://jquery-ui.googlecode.com/svn/tags/1.7/themes/redmond/jquery-ui.css" rel="stylesheet" />
    <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script>
    <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.7.2/jquery-ui.min.js"></script>
    <style type="text/css">
	body{ font: 62.5% "Trebuchet MS", sans-serif; margin: 50px;}
    <%--Mostrar Dialogo con botones--%>
    <script type="text/javascript">
 	// Dialog Cargando Sin Botones		
	    autoOpen: false,
	    width: 300,
	    modal: true
    <form id="form1" runat="server">
        <asp:Button ID="btnTest" Text="Prueba" OnClientClick="return btnTest_Click()" OnClick="btnTest_Click" runat="server" />    
        <!--En el div colocamos el contenido a mostrar-->
	<div id="dialogLoading" title="Cargando Datos...">
           <p>Espere miestras se cargan los datos...</p>
    <script type="text/javascript">
      function btnTest_Click()
        return true;

En este punto solo nos queda el código del codebihind, que es donde deberíamos hacer la búsqueda de los vuelos, en nuestro caso solo haremos una espera de 5 segundos para simular la demora.

protected void btnTest_Click(object sender, EventArgs e)

jQuery-UI-Dialog Cargando

Hasta aquí el ejemplo de uso de jQuery UI, Dialog. Espero te halla servido para iniciarte en esta interesante biblioteca de componentes.

Si deseas conocer como resolver este mismo ejemplo pero utilizando JQuery Tools – Overlay, entonces pincha aquí.

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