Re: Getting the middle of an object to snap to grid - how?

[Arv Evans <arvid evans gmail com>]

Making the resistor one step wider or narrower will get rid of the problem
of it's endpoint being half way between a pair of grid lines.  It the grid is
set too coarse this may make the resistor wider or narrower than desired,
so the fix is to adjust the grid lines closer or further apart.



Arv
_._


On 12/28/2010 03:23 PM, Chris G wrote:

On Tue, Dec 28, 2010 at 05:05:40PM -0500, Michael Ross wrote:

   If I place a resistor, and then a zig zag line, then I move an end of the
   zzline near an end point of the resistor the resistor get a red outline
   indicating there is a connection between the "grips,"  if I let the line
   go while the red outline is present then when I move the resistor the line
   tracks it.  If I move the line the resistor does not track the line.
   The four extents for the resistor symbol snap to the grid.  If you want
   the center of the resistor to snap exactly just so to the grid, you will
   have to size the grid so that when you place a corner the leg of the
   resistor is on a grid line.  

With the grid the way I have it I can't even get to connect the line to
the resistor because the centre line of the resistor is between grid lines.

I have to turn 'Snap to Grid' off to connect the line to the resistor,
then turn it back on and it acts as you say.

   Sorry you don't like this functionality, but it makes sense to me, the
   grid is essentially arbitrary so there is no particular reason why the
   symbols should be constrained to it.   If you really need it to be just so
   then you can control the size and shape of the symbol and grid to produce
   the result you are after.  I prefer the more general solution that is
   implemented where any symbol of any size has connection points to which a
   line will glom onto it and move with the symbol.

That's OK if *every* symbol you want has a ready made representation
with connection points, however I've found I always want quite a few
extra symbols (e.g. in the current circuit I'm drawing I have several
multiway switches) and then it begins to get clumsy.

Maybe I simply need to reduce the grid size so that sensibly small
resistors are two grid lines wide and thus their centre lines are on a
grid line.

   If you can make a good case for the function you want, then perhaps the
   developers will be able to implement it.  or you can implement it
   yourself.  This is free open source software so you can learn to program
   it to do as you wish.

Of course, but it's a long term way of getting what I want.  It's always
good to ask knowledgeable people on a list such as this because very
often there are ways to get what one wants which are not immediately
obvious. 

Thanks for all the help.  I'm off to play some more and see if I can get
closer to what suits me.

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