Re: [Denemo-devel] PDF window

[Richard Shann]

On Thu, 2011-10-20 at 23:23 -0500, Jeremiah Benham wrote:
> On 10/20/2011 12:07 PM, Richard Shann wrote:
> > Jeremiah,
> >
> > I have now got the pdf widget working inside Denemo. The old print view
> > window is now showing a pdf of the score, and point and click now works
> > entirely internally inside Denemo (the previous version only worked with
> > xpdf and used external files and Unix signals to do the business).
> > For some reason, although the Print Dialog pops up, and lists my printer
> > correctly, I get no printing. This is not critical, because the previous
> > route to printing (ie the PrintPreview command) is still working as
> > before, launching an external pdf viewer.
> > Before I can check in though, I need the new dependency, which is
> > libevince2 (for building Denemo you need libevince-dev).
> > Can you create this dependency in the make system, so that the compile
> > and link steps have
> > -I/usr/include/evince/2.30
> >    -levview
> > (or whatever pkgconfig says are the include and lib flags)
> 
> Debian Sid has evince >= 3.0. 
I am not sure you are right here. Looking at this page

http://packages.debian.org/search?keywords=libevince&searchon=names&suite=all&section=all

it seems that the numbering system is a bit complex. 
Package libevince3 has the version of evince marked as 2.32 (which is
still gtk2 I am told). It is only package libevince3-3 that is version
3.2
So either libevince2 or libevince3 should be ok. But not libevince3-3
which only the latest gtk3 programs could use.

I think what this all means is they are continuing to make a gtk2
version available well into the future (because it will be a long time
before everyone is ready for gtk3). 

> This is going to require some massaging 
Are you sure? I am thinking that the package creators are probably
trying to minimize breakage of existing packages' dependencies. But,
beyond that thought, I really don't know. It may be that if it is
libevince3 we will need to omit the call to ev_init(), no longer needed,
or they may have provided a dummy to make the transition painless.

I suggest to check in the most straightforward thing first, to provide
the libevince library and include flags. I can then test if it will
build  at least with Debian Stable, and then we can add other cases if
they break.

Richard



> because the pkg-config file is named evince-view-3.0.pc. your version 
> would be called evince-view-2.3.pc. We use to do something similar to 
> this with portaudio versions. Theses lines would needed to be added for 
> 2.3.
> 
> PKG_CHECK_MODULES(EVINCE, evince-view-2.3 >= 2.3)
> CFLAGS="$CFLAGS $EVINCE_CFLAGS"
> LIBS="$LIBS $EVINCE_LIBS"
> 
> 
> PKG_CHECK_MODULES(EVINCE, evince-view-3.0 >= 3.0)
> CFLAGS="$CFLAGS $EVINCE_CFLAGS"
> LIBS="$LIBS $EVINCE_LIBS"
> 
> Perhaps I need to create a couple booleans to set the results of the 
> pkg_check. Something like VERSION2 VERSION3.
> sudo code:
> 
> if (VERSION2 || VERSION3)
>    CFLAGS="$CFLAGS $EVINCE_CFLAGS"
>    LIBS="$LIBS $EVINCE_LIBS"
> else
>    stop ./configure with error message
> 
> 
> Jeremiah
> 
> 
> 
> 
> 
> >   and I can then check in the code I have?
> > I believe if the version is greater than 2.32 there is a possibility
> > that some conditional code may be needed as the ev_init() call is no
> > longer needed (but perhaps they have made it a dummy).
> >
> > Richard
> >
> >
> >
> > On Tue, 2011-10-18 at 19:20 +0100, Richard Shann wrote:
> >> While asking about evince I was tipped off by a very helpful guy about
> >> an evince widget which we can embed in Denemo.
> >> This will mean that we have the pdf as a window inside Denemo and can
> >> not only do point and click without going outside in the present clunky
> >> fashion but can do all sorts of other stuff (dragging objects in the pdf
> >> window and having Denemo insert the needed LilyPond in the score).
> >> This will mark a major improvement - substituting for the current
> >> PrintPreview window with an evince widget which knows how to print and
> >> which denemo can talk too.
> >> Richard
> >>
> >>
> >>
> >> _______________________________________________
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> >
> >
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> 
> 
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