Application Debugging

[Robert Clove]

Hi All,

It is just an Linux question.
I have downloaded some linux software when i install it and then run it it
shows gui and allow us to do various things.
It is an open source software so we have the code also.
for what is was wondering can i debug the code.
Like when the gui is opened which function is executed and when i press
some button on gui which function is executed.
If yes please tell how,i am all new to linux .

Thanks
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