how to check canvas is empty or not

<canvas11″ height=”200px” width=”200px”>
<asp:Button runat=”server” ID=”btn1″ Text=”Save”  OnClientClick=”checkcanvas();” />
<script type=”text/javascript”>
function checkcanvas() {
var i = isCanvasTransparent();
//i =true    if canvas empty
//i =false       if canvas has image
}
function isCanvasTransparent() {
var canvas1 = document.getElementById(‘canvas11′);
// true if all pixels Alpha equals to zero
var ctx = canvas1.getContext(“2d”);
var result;
var imageData = ctx.getImageData(0, 0, canvas1.offsetWidth, canvas1.offsetHeight);
for (var i = 0; i < imageData.data.length; i += 4)
if (imageData.data[i + 3] !== 0) return false;
return true;
}
</script>

countdown timer in php,

$dateFormat = “d F Y — g:i a”;
$targetDate = $futureDate;//Change the 25 to however many minutes you want to countdown change date in strtotime
$actualDate = $date1;
$secondsDiff = $targetDate – $actualDate;
$remainingDay     = floor($secondsDiff/60/60/24);
$remainingHour    = floor(($secondsDiff-($remainingDay*60*60*24))/60/60);
$remainingMinutes = floor(($secondsDiff-($remainingDay*60*60*24)-($remainingHour*60*60))/60);
$remainingSeconds = floor(($secondsDiff-($remainingDay*60*60*24)-($remainingHour*60*60))-($remainingMinutes*60));
$actualDateDisplay = date($dateFormat,$actualDate);
$targetDateDisplay = date($dateFormat,$targetDate);
<script type=”text/javascript”>
var days = <?php echo $remainingDay; ?>
var hours = <?php echo $remainingHour; ?>
var minutes = <?php echo $remainingMinutes; ?>
var seconds = <?php echo $remainingSeconds; ?>
function setCountDown(statusfun)
{//alert(seconds);
var SD;
if(days >= 0 && minutes >= 0){
var dataReturn =  jQuery.ajax({
type: “GET”,
url: “<?php echo Mage::getBaseUrl(Mage_Core_Model_Store::URL_TYPE_WEB).’index.php/countdowncont/’; ?>”,
async: true,
success: function(data){
var data = data.split(“/”);
day =  data[0];
hours =  data[1];
minutes =  data[2];
seconds =  data[3];
}
});
seconds–;
if (seconds < 0){
minutes–;
seconds = 59
}
if (minutes < 0){
hours–;
minutes = 59
}
if (hours < 0){
days–;
hours = 23
}
document.getElementById(“remain”).style.display = “block”;
document.getElementById(“remain”).innerHTML = ” Your Product Reverse For “+minutes+” minutes, “+seconds+” seconds”;
SD=window.setTimeout( “setCountDown()”, 1000 );
}else{
document.getElementById(“remain”).innerHTML = “”;
seconds = “00″; window.clearTimeout(SD);
jQuery.ajax({
type: “GET”,
url: “<?php echo Mage::getBaseUrl(Mage_Core_Model_Store::URL_TYPE_WEB).’index.php/countdown/’; ?>”,
async: false,
success: function(html){
}
});
document.getElementById(“remain”).innerHTML = “”;
window.location = document.URL; // Add your redirect url
}
}
</script>
<?php
if($date1 < $futureDate &&  ($qtyCart > 0)){ ?>
<script type=”text/javascript”>
setCountDown();
</script>
<?php }else{ ?>
<style>
#remain{display:none;}
</style>
<?php }}?>
<div id=”remain”></div>

Prevent HttpContext.Current to be null in WCF service in .net

add following code in web.config file…..
<configuration>
<system.serviceModel>
<serviceHostingEnvironment aspNetCompatibilityEnabled=”true” />
</system.serviceModel>
</configuration>

get custom option name in filter.phtml(layred navigation)

<?php echo $_item->getName() ?>

Add module in artical in joomla

To insert a module inside an article, use the {loadposition xx} command, as follows:
Create a module and set its position to any value that doesn’t conflict with an existing template position. You can type in the position value instead of selecting it from the drop-down list. For example, use the position myposition.
Assign the module to the Menu Items that contain the articles that you want the module to show in. You can also just assign the module to all Menu Items.
Edit the articles where you want this module to appear and insert the text {loadposition myposition} in the article at the place where you want the module.

wysiwyg editor in Magento Custom Module

Step 1 – Go to app/code/local/Webkul/Faq/Block here webkul is namespace and faq is module name , under your _prepareLayout() function add this code
public function _prepareLayout()
{
if (Mage::getSingleton(‘cms/wysiwyg_config’)->isEnabled() && ($block = $this->getLayout()->getBlock(‘head’))) {
$block->setCanLoadTinyMce(true);
}
return parent::_prepareLayout();
}
Then go to app/code/local/Webkul/Faq/Block/Adminhtml/Faq/Edit/Tab
and add following code in your _prepareForm() function below your setform() . $this->setForm($form);
$wysiwygConfig = Mage::getSingleton(‘cms/wysiwyg_config’)->getConfig(array(‘add_variables’ => false, ‘add_widgets’ => false,’files_browser_window_url’=>$this->getBaseUrl().’admin/cms_wysiwyg_images/index/’));
then define this as $fieldset
$fieldset->addField(‘body’, ‘editor’, array(
‘name’ => ‘body’,
‘label’ => Mage::helper(‘faq’)->__(‘Content’),
‘title’ => Mage::helper(‘faq’)->__(‘Content’),
‘style’ => ‘width:700px; height:500px;’,
‘state’ => ‘html’,
‘config’ => $wysiwygConfig,
‘wysiwyg’ => true,
‘required’ => true,
));
This post is original on webkul

magento display attribute in dropdown

Create a attribute
and then
edit app/code/core/Mage/Catalog/Block/Navigation.php

public function getAllManu()
{
$product = Mage::getModel(‘catalog/product’);
$attributes = Mage::getResourceModel(‘eav/entity_attribute_collection’)
->setEntityTypeFilter($product->getResource()->getTypeId())
->addFieldToFilter(‘attribute_code’, ‘manufacturer’); //can be changed to any attribute
$attribute = $attributes->getFirstItem()->setEntity($product->getResource());
$manufacturers = $attribute->getSource()->getAllOptions(false);
return $manufacturers;
}
and then
edit app/design/frontend/default/default/template/catalog/navigation/top.phtml

1. <select id=“select-manufacturer” onchange=“window.location.href=this.value”>
2. <option value=“#” selected=“selected”>–Select Manufacturer–</option>
3.     <?php foreach ($this->getAllManu() as $manufacturer): ?>
4.         <option value=“/catalogsearch/advanced/result/?manufacturer[]=<?php echo $manufacturer['value'] ?>”><?php echo $manufacturer['label'] ?></option>
5.     <?php endforeach; ?>
6.     </select>