On Tuesday 28 December 2004 5:14 pm, Hernan Tylim wrote:

Maybe I already asked you when you first released Connectors 2, but could you please make a very brief description of what I should take into account to port Jacaranda to Connectors 2?

I will try. It's been a while since I looked at Connectors 1. Off the top of my head (I'm sure I'm missing some things):

Changes between Connectors 1.9 and Connectors 2.2 installation and packaging since 3.8 includes most of the fix changesets, Connectors2 does not include these for 3.8 packages broken up a bit more user-level appearance improvements anti-aliased drawing of all connectors curved connectors are now quadratic Bezier splines added shape classes NCCurveMorph new Arrow editor can define arrows from TrueType fonts more consistent yellow-button menus no world-level serialization included project saving works OK though no dashed lines will do someday but haven't yet but have bitmap and gradient fills connections to same object work much better now programmer-level different connector class NCAAConnectorMorph replaces NCConnectorMorph they can't coexist (incompatible changes to NCLineEndConstraintMorph) different FSM class supports hierarchical state machines easier to extend event handling has changed significantly including event-related callbacks allows easy logging of events suspension, cloning, and copying fixes event handler put to sleep when used as prototype API changes added hooks for graph model geometry changes end decorations should now be defined as curves addShape: has not been tested, and is usually not the best way to change ends easier to override menu definitions etoy changes connection methods separated into "connection" and "connections to me" for clarity embeddings methods addition of user-level embedding support PinMorph added: automatically offers to embed when dropped on another Morph

In Jacaranda I have my own subclass of NCConnectorMorph and NCLabelMorph. I already tried to replace NCConnectorMorph with NCAAConnectorMorph but it didn't work, I had for example problems with the positioning of the arrow heads and other things. Did something change on how you handle the constraints?

I tried to look at your code but the Squeak Swiki was down. Is there another place that Jacaranda.20.sar (or your latest code) can be found?

I think that the main problem you're having with positioning arrows is if you use addShape: to change the end decorations. This is deprecated, and though it may work, it was never tested. Specifically, I don't think I'm moving the end vertices of the connector when a submorph is added to an end.

Instead, end decorations (arrows, etc.) should be defined as curves. These can be created (as code if you want) from glyphs in TrueType fonts (there is a tool provided to do this).