Difference between revisions of "Adding interface verbs"

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=Introduction to Verbs=
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Commands in Inkscape are called 'Verbs'.  They permit invoking internal functionality through menus and keyboard shortcuts.
 
Verbs are not terribly difficult to add.  You don't need to have much coding know-how in order to add a verb, and only a minimal knowledge of Inkscape internals.  The aim of this page is to provide novice coders with a "paint by numbers" process that can be followed to add a new verb to Inkscape.
 
 
=How to Add a Verb=
 
First, add IDs for your new verbs to verbs.h:
 
[http://svn.sourceforge.net/viewvc/inkscape/inkscape/trunk/src/verbs.h?r1=13280&r2=13309&sortby=date verbs.h]
 
The place of the ID in the list determines to which group it belongs
(EditVerbs, FileVerbs, etc) - however, this is pretty arbitrary, so
don't sweat if you can't find a perfect group for your verb, just use
whichever makes most sense.
 
Then is the meat of the matter.  In verbs.cpp, fill in the verb structure with the name,
description, action ID, etc; also in the same file, write the actual
commands that the verb will do, in a switch case in one of ::perform
methods:
 
[http://svn.sourceforge.net/viewvc/inkscape/inkscape/trunk/src/verbs.cpp?r1=13281&r2=13311&sortby=date verbs.cpp]
 
As you see, these verbs do different things depending on which tool
you are in. Before verbification, this was coded into tool context
files, and now we can remove that:
 
[http://svn.sourceforge.net/viewvc/inkscape/inkscape/trunk/src/node-context.cpp?r1=13296&r2=13309&sortby=date  node-context.cpp]
[http://svn.sourceforge.net/viewvc/inkscape/inkscape/trunk/src/select-context.cpp?r1=13200&r2=13309&sortby=date select-context.cpp]
[http://svn.sourceforge.net/viewvc/inkscape/inkscape/trunk/src/draw-context.cpp?r1=13148&r2=13310&sortby=date draw-context.cpp]
[http://svn.sourceforge.net/viewvc/inkscape/inkscape/trunk/src/draw-context.cpp?r1=13148&r2=13310&sortby=date draw-context.cpp]
 
(the last one required writing two functions that will be called by the
verb).
 
Now assign the keys to the newly created verbs:
 
[http://svn.sourceforge.net/viewvc/inkscape/inkscape/trunk/share/keys/inkscape.xml?r1=13302&r2=13307&sortby=date inkscape.xml]
 
and then copy inkscape.xml to default.xml.
 
Note: even if you are not assigning any key, you MUST list the new
verb in inkscape.xml, using a <bind> without a key. Not only this file
is a keymap, but it's also a reference for keymap writers, so it must
have all verbs, assigned or not.
 
If you added a shortcut which didn't exist before, update also doc/keys.xml.
 
If you want the new verb in the menu, edit menus-skeleton.cpp and
insert it there in an appropriate place.
 
Also review the other keymaps to see if you can assign the new verb to
some key that would make sense. So in adobe-illustrator.xml, I
assigned the new verbs to Alt+Ctrl+[], which seems to be the same
thing according to the comments:
 
[http://svn.sourceforge.net/viewvc/inkscape/inkscape/trunk/share/keys/adobe-illustrator-cs2.xml?r1=13304&r2=13308&sortby=date adobe-illustrator-cs2.xml]
 
Finally update the [[ReleaseNotes]] with your new work!  :-)

Latest revision as of 14:51, 13 March 2023

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