Hi Eero,<br><br>I tried reducing the hierarchy and it helped, but I am still trying to reduce it further. Currently I am using 24 bit png (24 bit bmp converted to png) images for all image widgets. Will it help if I use 8-bit bitmaps (converted to png) to lighten the UI? Is there any other image format supported by Maemo/GTK which would make it lighter?<br>
<br>Thanks for the help,<br>Lomash<br><br><div class="gmail_quote">On Fri, Mar 7, 2008 at 1:58 PM, Eero Tamminen <<a href="mailto:eero.tamminen@nokia.com">eero.tamminen@nokia.com</a>> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Hi,<br>
<div class="Ih2E3d"><br>
ext kumar lomash wrote:<br>
> I have been developing GUI using GTK +2.0 and now I am facing some<br>
> performance issues. Let me first describe<br>
><br>
> The implementation: -<br>
> The UI consists of layouts (GtkContainers) which have event box and image<br>
> widgets. At any given time only one of the four layouts is visible and the<br>
> user can select a layout at any given time. On an average each layout has 25<br>
> buttons (internally event boxes and image widgets). Every button has 3<br>
> states so there are 6 (3 event + 3 image) widgets for every button. A total<br>
> of 4 layouts make 600 widgets roughly at any given time.<br>
><br>
> The Problem: -<br>
> Whenever user switches between layouts, I hide other layouts (hide the<br>
> containers) and show the selected layout. The problem is that it takes very<br>
> long to do these operations.<br>
<br>
</div>You need to profile your application to see what is the bottleneck.<br>
I think you could do it even on x86 (e.g. using Valgrind/callgrind<br>
+ Kcachegrind).<br>
<br>
If you have deep widget hierarchy, you could try reducing levels in it<br>
(deep widget hierarchies can greatly increase the number of signals<br>
needed to propagate changes).<br>
<div><div></div><div class="Wj3C7c"><br>
<br>
> Is there a better way of doing this? I used event boxes and image widgets in<br>
> place of gtkbuttons because I needed custom shaped buttons with custom<br>
> bitmaps over them.<br>
<br>
<br>
</div></div><font color="#888888"> - Eero<br>
<br>
</font></blockquote></div><br>