Problems programming a small graph-editor

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#1493

From: Uli Fraus
Date: Wed, 19 Jun 1991 17:23

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Hello all InterViews 2.6 experts,

I am trying to programm to program a small IV application for drawing simple
graphs (nodes & edges). This application should come up with an empty
GraphicBlock plus some Buttons and a Panner. I used the graphics demo as an
example. So I have Tray with the GraphicBlock (containing an empty Graphic)
and a VBox (containing Buttons and Panner). This seem ok to me.

But I have to two nasty problems:
 - First my window is coming up at minimal size (0x0) if the Graphic is empty.
   (I found no possibility to use a predefined Canvas! like SetCanvas() ??? )

 - Second: If I click inside the GraphicBlock to set a new node, the node
   appears about 2 inch left and up of the click-point. BUT if I click on a
   node for moving (function from graphics) it work quite well. So I think
   I have a problem with relative and absolute coordinates.

If you have any solutions or hints for these problems please tell me.
Thanks
				Uli Fraus.

-- 
Ulrich Fraus, FORWISS Passau, University of Passau, Germany        ||====
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Message-ID: <1991Jun19.172322.27647@forwiss.uni-passau.de>

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From: fraus@forwiss.uni-passau.de (Uli Fraus)
Newsgroups: comp.windows.interviews
Subject: Problems programming a small graph-editor
Message-ID: <1991Jun19.172322.27647@forwiss.uni-passau.de>
Date: 19 Jun 91 17:23:22 GMT
Sender: Uli Fraus (FORWISS Passau, Germany)
Followup-To: comp.windows.interviews
Organization: University of Passau, Germany
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Nntp-Posting-Host: forwiss.uni-passau.de