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List:       kde-core-devel
Subject:    kpanelapplet.h
From:       Matthias Ettrich <ettrich () trolltech ! com>
Date:       2000-03-28 21:18:22
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Hi,

I don't understand the kpanelapplet API. It's supposed to replace kapplet, but
I can't see how and why.

Missing things:

      - slots for remove- or move-requests. They are needed in order to allow
         the applet to tell the panel that it should be moved or removed. Try
        'exampleapplet' and use the RMB menu.

      - a virtual setupGeometry function or at least a setup() handler. This is
         needed to notify the applet when the geometry of the panel changes. 
         Run 'exampleapplet' in a horizontal panel and then move the panel to
         the left:  the applet automatically adjusts itself to be a vertical
         applet. The new class kpannelapplet cannot do that.

Bad things:

       - orientation() and position() are probably queried quite often ( for
          example in paint event handling). Having them doing synchonous dcop
          calls is too slow. Rather cache these values in the applet and
          implement a callback were the panel informs the applets about position
          or orientation changes. But again, the old class did that.


The only benefit I see are the heightForWidth() and widthForHeight() functions.
What's the purpose of KPanelApplet? Or better: what's wrong with KApplet that
can't be fixed?


Matthias

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