Bug: drawing happening outside of expose-event

Heya,

yesterday I looked a bit into getting gkrellm working on OS X using  
the "native" GTK+ (i.e. without X11). OS X enforces drawing to happen  
in expose-events but gkrellm does timer-based drawing.

Basically all gdk_draw_drawable() calls that have drawing_area- 
 >window set as their destination are "wrong" if called from outside  
an expose event. I have tried replacing all these calls (found them  
in chart.c, panel.c and krell.c) with calls to  
gtk_widget_queue_draw_area() or gdk_window_invalidate_rect() (not  
sure which one to use). I'm not yet sure if the behaviour is  
completely correct on OS X but gkrellm at least updates about once or  
twice per second. Before that change I had to click on the main- 
window in order to produce a proper redraw via expose-event.

As I have little knowledge about how gkrellm actually assembles its  
window-contents I'm not sure if deferring all these redraws into  
expose-events will break something in gkrellm. OTOH GTK+ itself tells  
users to only draw onto windows inside an expose-event so gkrellm  
should be fixed in that regard.

Further talk about the OS X porting work I did so far can be found at  
http://developer.imendio.com/node/135.
Drawing in GTK+ is explained in http://library.gnome.org/devel/gtk- 
tutorial/stable/x2312.html and http://library.gnome.org/devel/gdk/ 
unstable/gdk-Windows.html#gdk-window-invalidate-region, just if  
anyone is searching for docs for all this stuff :)

Bye,
Stefan aka mETz

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