Please describe the problem:
The logo is rendered incorrectly when the exposed area does not cover the entire area of the widget.


Steps to reproduce:
This bug will probably only be reproducable when the user is not using an X compositing manager. Turn off xcompmgr/compiz etc. Go to the System tab in System Monitor. Open the menus such as Monitor and Edit and notice that the logo is rendered at an incorrect offset.


Actual results:


Expected results:


Does this happen every time?


Other information:
The Cairo logic in sysinfo_logo_expose() in sysinfo.cpp is flawed:

cairo_translate(cr, event->area.x, event->area.y);

This translates the starting point of the Cairo context to the origin of the exposure event which may be any point within the widget. Thus the entire logo is drawn starting from the point of the exposure event which is incorrect.

There are many examples of rendering a widget properly using Cairo in Gnome and on the Web.