I want to build something smiliar to http://www.exquisiteforest.com/tree/336334 in D3. In detail, i have tree and I only want to zoom in/out by mouse scroll and translate within tree scope(0 -> tree's width and 0 -> tree's height when zoom tree).Only zoom in/out by mouse scroll, i disable dblclick.zoom and it success but I don't know how to translate in tree scope. Moreover, how can I create version of small tree like this link aboveThanks in advance.