Add digital signature pad in sencha touch 2 - sencha-touch-2

In my app I want to add digital signature pad.
When I click on button say sign then pop up of signature pad should be get open and when I click on save signature should get save in image format.
I have refer the following links but I am not able to get that ...
Please Explain me what should I do. Thanks in advance..
Links are :
1: http://www.sencha.com/forum/showthread.php?121136-simFla.ux.plugins.signaturePad
2: http://j-query.blogspot.in/2011/02/sencha-touch-ipad-signature-javascript.html

Hi please refer this link to use canvas github plugin for digital signature click link
Hope this help. good luck ...

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