Hi,
Usually, the drawer mechanism is something that needs to be done by the template itself.
What the template developer does is that he creates a position inside the drawer area so that the user of the template can add the modules he wants in the drawer. And this can potentially be the cart module we provide by default with HikaShop.
For example, most templates from L Theme have that kind of drawer system:
www.hikashop.com/download/templates-for-hikashop.html
And so, you could configure the cart module to display inside the drawer.
Opening the drawer when a product is added to the cart is not a function these templates provide unfortunately as far as I know. However, it's not impossible to add. HikaShop has a javascript event fired when a product is added to the cart:
www.hikashop.com/support/documentation/6...ocumentation.html#js
So the developer of the template, or any developer, actually, could add a few lines of code to handle this.
However, while researching a bit in order to answer, I think I've got a good idea on what to do in order to add these capabilities to the cart module by default for a future version of HikaShop. So it will likely take a few weeks / months before you would be able to use it.