[IPython-dev] Min: Cmd-P/Ctrl-P for new print code question..

MinRK benjaminrk at gmail.com
Tue Oct 26 16:35:25 EDT 2010

On Tue, Oct 26, 2010 at 13:06, Fernando Perez <fperez.net at gmail.com> wrote:

> Hey Min,
> in console/console_widget.py:
> e11b615e (MinRK          2010-10-18 16:34:07 -0700  170)         #
> Configure actions.
> e11b615e (MinRK          2010-10-18 16:34:07 -0700  171)
> action = QtGui.QAction('Print', None)
> e11b615e (MinRK          2010-10-18 16:34:07 -0700  172)
> action.setEnabled(True)
> e11b615e (MinRK          2010-10-18 16:34:07 -0700  173)
> action.setShortcut(QtGui.QKeySequence.Print)
> e11b615e (MinRK          2010-10-18 16:34:07 -0700  174)
> action.triggered.connect(self.print_)
> e11b615e (MinRK          2010-10-18 16:34:07 -0700  175)
> self.addAction(action)
> e11b615e (MinRK          2010-10-18 16:34:07 -0700  176)
> self._print_action = action
> you added in line 173 the default print keybinding to the Print
> action.  One problem that introduces is that it overwrites the
> keybinding we had for Ctrl-P, which was equivalent to 'smart up arrow'
> (history-aware).

Hm, that's annoying, sorry I didn't catch it.

One of my very favorite things about OSX is that since the standard meta key
is cmd instead of ctrl, all regular GUI bindings (entirely cmd-based) and
all emacs-style bindings (ctrl-based) have no degeneracy, so you don't have
to choose between having ctrl-a be home or select-all, or this cmd/ctrl-P
behavior, and basic emacs navigation works in *all* GUI apps by default.

Since that keybinding has been there for a long
> time, is consistent with the terminal and we want to preserve as much
> similarity as reasonable with habits from the terminal, we need to
> change this.  I think a reasonable compromise is to make:

> Ctrl-P -> 'smart up arrow'
> Ctrl-Shift-P -> Print
> But I don't want to make any changes, as I don't know if on the Mac,
> there is no problem.  I don't know if on the mac, Control-p and Cmd-p
> are different, so that Ctrl-p remains as before and only Cmd-p goes to
> print.
> If that's the case, then we should probably leave it as you did for
> the Mac, and only change the keybinding for Linux/windows (which don't
> have a separate Cmd key).

Yes, we should do a platform check, since it would be completely hideous to
be the only Mac app in the world that doesn't use cmd-P for print.

Is it just Linux, or will there also be a conflict in Windows?
 Specifically: is OSX the only one without a problem, or is Linux the only
one with a problem?

Is there a similar conflict on ctrl-S?


> Thoughts?
> Cheers,
> f
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