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List:       koffice-devel
Subject:    Re: improving speed of painting
From:       Norbert Andres <nandres () web ! de>
Date:       2002-09-02 20:12:26
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I put a kdDebug() in paintCell and did the following:
mark A1:C1, merge and click somewhere else. After clicking some place else
each cell gets painted _5_ times. That's a little bit too much, isn't it?
(By the way the cells should get painted after merging, but they are not. This 
is something we could backport in the 1.2 branch - if we fix it)

On Saturday 31 August 2002 09:12, Ariya Hidayat wrote:
> Run KSpread with empty sheet, switch to 30% zoom and you'll see that
> painting is done cell-by-cell. On my slow machine, it takes almost 2 sec
> for the whole screen. Is there anything we can do to speed it up ? Perhaps
> something like setUpdatesEnabled() in QWidget or another totally different
> tricks.
>
> In addition, I found that all KOffice apps uses its own "canvas". Is it
> possible to create a unified canvas, i.e KoCanvas, which will used though
> all application ? Has anyone done any research on item-based canvas ala
> GnomeCanvas, especially with respect to the performance ?
>
> FYI, I'm thinking of adding simple draw feature for spreadsheet, e.g
> creating arrow and other humble shapes. IMHO it's easier to duplicate what
> KPresenter or Karbon have done, or move such things into KOffice library.
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