Creating a paint brush in opencv C++ [closed]

edit

I want to create an image editing tool in OpenCv with C++ and for that the I need to implement the 'painting with a brush' facility available in MSPaint or other paint applications. The workflow should work like this: - The users should select the 'Brush' tool from the right hand pane. - and then scribble on the image marking the areas they want to edit. - the tool should be able to identify the pixels marked by the user for further processing.

I wanted to know about similar projects in OpenCV so that I can see the source code and try to make a project doing the same. Suks