The Qt C/C++ perspective defines a set of common views that make developing Qt programs faster and easier. It is essentially the same as the Carbide C/C++ perspective except that the Symbian Project Navigator view is removed, and the following views added:
See the Qt SDK documentation for more information on these views.
Figure 1. Qt C/C++ perspective
The Qt perspective watches the .pro file associated with the project and will update the derived project bld.inf and .mmp files to match. You can control this behavior with the Run qmake when .pro file changes option in the Qt Properties panel.