Difference between revisions of "Adding AJAX to your component"
From Joomla! Documentation
| Line 1: | Line 1: | ||
To add ajax to your component: | To add ajax to your component: | ||
| + | == Phase 1 == | ||
1- Make the necessary javascript ajax functionality in your default.php (or other layout) | 1- Make the necessary javascript ajax functionality in your default.php (or other layout) | ||
ex. | ex. | ||
| − | + | <source lang="javascript"> | |
| − | + | ||
function ajxGetCitys(country_id){ | function ajxGetCitys(country_id){ | ||
| Line 54: | Line 55: | ||
xhr.open("GET","index2.php?option=com_user&task=listcity&country_id="+country_id,true); | xhr.open("GET","index2.php?option=com_user&task=listcity&country_id="+country_id,true); | ||
xhr.send(null); | xhr.send(null); | ||
| − | } | + | }</source> |
| − | </ | ||
| + | == Phase 2 == | ||
2- in the controller.php add new function (or task)like listcity in the above example: | 2- in the controller.php add new function (or task)like listcity in the above example: | ||
example: | example: | ||
| − | + | <source lang="php"> | |
function listcity() | function listcity() | ||
{ | { | ||
| Line 82: | Line 83: | ||
$mainframe->close(); | $mainframe->close(); | ||
| − | } | + | }</source> |
| − | 3- Here i have a methode getStates($country_id) in the register model to extract the list countries from my bdd ,you can adapt to your needs | + | 3- Here i have a methode getStates($country_id) in the register model to extract the list countries from my bdd ,you can adapt it to your needs .Good luck |
Revision as of 09:11, 30 July 2008
The "J1.5" namespace is an archived namespace. This page contains information for a Joomla! version which is no longer supported. It exists only as a historical reference, it will not be improved and its content may be incomplete and/or contain broken links.
To add ajax to your component:
Phase 1[edit]
1- Make the necessary javascript ajax functionality in your default.php (or other layout)
ex.
function ajxGetCitys(country_id){
var xhr = getXhr();
// On défini ce qu'on va faire quand on aura la réponse
xhr.onreadystatechange = function(){
// On ne fait quelque chose que si on a tout reçu et que le serveur est ok
if(xhr.readyState == 4 && xhr.status == 200){
var city=document.getElementById('city');
try //Internet Explorer
{
xmlDoc=new ActiveXObject("Microsoft.XMLDOM");
xmlDoc.async="false";
xmlDoc.loadXML(xhr.responseText);
}
catch(e)
{
try //Firefox, Mozilla, Opera, etc.
{
parser=new DOMParser();
xmlDoc=parser.parseFromString(xhr.responseText,"text/xml");
}
catch(e) {alert(e.message)}
}
var options =xmlDoc.getElementsByTagName('options').item(0);
city.innerHTML='';
for (i=0; i < options.childNodes.length; i++){
var newoption=document.createElement("option");
var myoption=options.childNodes[i];
var newtext=document.createTextNode(myoption.childNodes[0].nodeValue);
newoption.setAttribute("value",myoption.getAttributeNode('id').value)
newoption.appendChild(newtext);
city.appendChild(newoption);
// alert( myoption.getAttributeNode('id').value+ " " + myoption.childNodes[0].nodeValue);
}
}
}
xhr.open("GET","index2.php?option=com_user&task=listcity&country_id="+country_id,true);
xhr.send(null);
}
Phase 2[edit]
2- in the controller.php add new function (or task)like listcity in the above example:
example:
function listcity()
{
global $mainframe;
$country_id=JRequest::getVar( 'country_id');
$model = $this->getModel('register');
$states = $model->getStates($country_id);
$return = "<?xml version=\"1.0\" encoding=\"utf8\" ?>";
$return .= "<options>";
$return .= "<option id='0'>".JText::_( '---Select city---' )."</option>";
if(is_array($states)) {
foreach ($states as $state) {
$return .="<option id='".$state->state_id."'>".JText::_($state->state_name)."</option>";
}
}
$return .= "</options>";
echo $return;
$mainframe->close();
}3- Here i have a methode getStates($country_id) in the register model to extract the list countries from my bdd ,you can adapt it to your needs .Good luck