Re: Are there any easy methods to draw and update piechart than this?

[Tristan Van Berkom <vantr touchtunes com>]

This function:
   
http://developer.gnome.org/doc/API/2.0/gdk/gdk-Drawing-Primitives.html#gdk-draw-arc

could be used.

praveen manja wrote:

> Hi Gnomites,
>
> Please let me know if there are there any easy methods to draw and 
> update piechart than this.
>
>
>  I am developing a cluster management tool along with dynamic resource 
> monitoring component.
>  In GUI I have developed dynamically updated piecharts and barcharts 
> to show sys-resources.(as you can see process bars in GTOP) .
>
>  I didn't use GnomeCanvasEllipse to draw the piechart, as the whole 
> ellipse has to be filled by a single color. But I need different 
> colors to be filled amongst the units of the piechart.
>   (Eg. In a piechart showing meminfo, I need green for Memfree and 
> orange for Mem used.)
>
>  Hence I was forced to use 360 isosceles triangles with :
>
>              length of a, b (of equal sides) =  radius,
>              length of c     =     1 unit (converted to canvas unit)
>              angle = 1 deg (converted to radian)
>
>   Using the above info I iterated a loop to draw  360 polygons(triangle)
> and later I updated the polygon points using
>
>   gtk_timeout_add()
>
> and
>
>   gnome_canvas_item_set()           in my  callback to set the new 
> color of the already created triangle .
>
>     It is workin fine.
>
> Please let me know if there are there any easy methods to draw and 
> update piechart than this.
>
>
> Thanks,
>
> Praveen S Manja.
>
>
>
>
>
>
>
>
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