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Date: Sun, 28 Feb 2016 11:24:17 -0900
Message-ID: <CAC4O8c9z2Se0dz9fqMfq3Wf_Bbn-ie3xTpvdLV09JjjyKTO32Q@mail.gmail.com>
Subject: Re: [geda-user] Re: re-instituting GetXY()
From: "Britton Kerin (britton DOT kerin AT gmail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
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On Sat, Feb 27, 2016 at 11:32 PM, Bert Timmerman
(bert DOT timmerman AT xs4all DOT nl) [via geda-user AT delorie DOT com]
<geda-user AT delorie DOT com> wrote:
> Britton Kerin (britton DOT kerin AT gmail DOT com) [via geda-user AT delorie DOT com] wrote:
>>
>> On Sat, Feb 27, 2016 at 2:22 PM, DJ Delorie<dj AT delorie DOT com>  wrote:
>>
>>>
>>>
>>>>
>>>> Seems to work.  So I guess doing things this way the&x and&y args aren't
>>>>
>>>> used for anything, and the rest of the actions in the sequence know to
>>>> get
>>>> the coordinates from a global somewhere?
>>>>
>>>
>>> Yup.
>>>
>>>
>>>>
>>>> It looks like there are only a handful of actions that set
>>>> need_coord_msg
>>>> non-NULL.  Is there any reason to have both mechanisms?  I haven't run
>>>> into
>>>> anything that seems to need multiple clicks.
>>>>
>>>
>>> Sometimes an action itself needs a point, and provides a reason.  It
>>> would fail without one, so it says so.
>>>
>>> Sometimes you mix many actions together, some of which need points,
>>> but the reason for the *mix* differs, so you can change the message
>>> the user sees.  For example, the list of actions that converts a
>>> selection to an element needs a point for the element's mark, but none
>>> of the individual actions involved know that (IIRC the cut() needs a
>>> point, but it doesn't know it's being used to convert an element).
>>>
>>> In these cases, GetXY() lets you "document" a set of actions in a way
>>> that's meaningful to the user.
>>>
>>
>> Ok thanks.  At first glance it's highly surprising that GetXY() ends up
>> needing
>> to declare itself as an action that doesn't require a point, and I suppose
>> that's why it's got it's present "".  GetXY() effectively acts only on
>> behalf
>> of other actions.  If there's any small renaming or refactor that might
>> make
>> all this clearer it might be worth it.  I don't know what it would be
>> though
>> so unless you have ideas I'll just comment it in GetXY() and make this
>> change.
>>
>> Britton
>>
>
> Hi,
>
> These may help:
>
> http://git.geda-project.org/pcb/commit/?h=home/bert/doxygen&id=8c138288c086870eea9368d119590d68f82a849f
>
> and
>
> http://git.geda-project.org/pcb/commit/?h=home/bert/doxygen&id=81d21282cb24d32f376791a3f1e79d86a5c70b1e

Nice.  I think we're about to change it so it doesn't work exactly that way
anymore, so the explanatory tips for the menu items/hotkeys that use GetXY()
can work.  If you can go ahead and merge these to master I'll update them
as appropriate.

Britton