title: Generate Call-Tree from cscope database
body: <p>I want to generate Full and Partially Call Trees from cscope database of c and c++ projects in Linux.</p>
  
  <p>The project is rather large, so it can be not easy to work with the full call tree of project, so I want to limit call tree generation with grep-like filter of function names.</p>
  
  <p>And also I want to be able to build "called by" and "called from" sub-trees from any point.</p>
  
  <p>So tool must be interactive and easy to patch.</p>
  
  <p>PS:
  I want use cscope database, because it is already used in project and generating of it is rather fast. I use vim editor and have X windows system.</p>
  
  <p>There is cbrowser program on sourceforge, but its call-tree (callgraph) functionality is broken.</p>