[Gtk2-perl-bugs] [Bug 591070] New: no support for GType/GParamGType

[gnome-perl (bugzilla.gnome.org) <bug...@bu...>]

If you have any questions why you received this email, please see the text at
the end of this email. Replies to this email are NOT read, please see the text
at the end of this email. You can add comments to this bug at:
  http://bugzilla.gnome.org/show_bug.cgi?id=591070

  gnome-perl | Glib | Ver: unspecified
           Summary: no support for GType/GParamGType
           Product: gnome-perl
           Version: unspecified
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: Glib
        AssignedTo: gtk...@li...
        ReportedBy: eb...@gm...
         QAContact: gtk...@li...
     GNOME version: 2.27/2.28
   GNOME milestone: Unspecified


currently, Glib does not support values and GParamSpec dealing with GType, thus
it's impossible to deal with object properties storing a GType.

rationale: Clutter has a class which stores an interval between two values,
ClutterInterval; it would be probably more Perl-ish to override the bindings
completely and write intervals as arrayrefs, but one of the nice bits of the
class is that it allows subclasses to override the interval progress using
their own progress function, e.g.:

  interval('boolean') = [ false, true ]
  compute(interval, progress=0.0) = false
  compute(interval, progress=0.2) = false
  compute(interval, progress=0.4) = false
  compute(interval, progress=0.6) = true
  compute(interval, progress=0.8) = true
  compute(interval, progress=1.0) = true

  myinterval('boolean') = [ false, true ]
  myinterval.threshold = 0.7
  compute(myinterval, progress=0.0) = false
  compute(myinterval, progress=0.2) = false
  compute(myinterval, progress=0.4) = false
  compute(myinterval, progress=0.6) = false
  compute(myinterval, progress=0.8) = true
  compute(myinterval, progress=1.0) = true

the type of the value of the interval is stored as a :value-type property in
the C class, declared with g_param_spec_gtype(), since we allow interpolating
the progress even between boxed types (e.g. colors or geometries).

if I try to subclass ClutterInterval from Perl, and pass any value to the
:value-type property at construction time, Perl, Glib and GLib will get *very*
angry at me.


-- 
See http://bugzilla.gnome.org/page.cgi?id=email.html for more info about why you received
this email, why you can't respond via email, how to stop receiving
emails (or reduce the number you receive), and how to contact someone
if you are having problems with the system.

You can add comments to this bug at http://bugzilla.gnome.org/show_bug.cgi?id=591070.