On Tue, Sep 9, 2008 at 9:39 AM, Edgar J. De Cleene edgardec2001@yahoo.com.ar wrote:
El 9/9/08 4:45 AM, "Ian J Cottee" icottee@bluefountain.com escribió:
Hi all
I've spent the last month or so working through the Squeak By Example book and now need to actually try to do something in order to make it all gel in my mind. My current requirement seems quite 'simple' to describe but I am not quite sure where to go from here.
For a very simple first step I want to take two text boxes, draw an arrow between them and then, when I switch the box 'on' - box1 will send an item (represented as a simple shape) along the arrow to box2. When it reaches box2, box1 will send the next. As each item reaches box2, box2 will be doing 'something'. This is the first stage of modelling a production system where items are sent from machine to machine down a production line.
I've found the Connectors framework which solves the problem of drawing boxes and linking them together. What I can't work out is that if I have a box, how do I know what arrows are connected to it? How do I know if the arrow is pointing out of the box or into the box (so should I be sending down it or receiving through it) and how do I animate that arrow to show an item passing down it?
I guess the main question is (first of all) just working out what arrows are joined to a box. Having browsed through the classes NCTextRectangleMorph (my current box class) and NCAAConnectorMorph (my current arrow class) I'm none the wiser. Is there any documentation for programming the Connectors framework? I've googled but turned nothing up so far.
Any pointers/advice gratefully received.
Ian
See my LogicCircus http://wiki.squeak.org/squeak/5991
Click on picture and download the .pr
It's a very bacic Logic Gates simulator, which "wire" components when you click from first to second. If you study , could solve some of your needs IMHO.
Edgar
Many thanks for the pointer Edgar. I've installed and taken a look. It's obviously a lot easier to understand as a unit than the Connectors framework and if I don't make any progress I may well use your simulator as a starting point instead.
I'll let you know how I get on :)
Many thanks again
Ian