Gtkmm-forge Digest, Vol 6, Issue 2

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Today's Topics:

   1. [Bug 369335] New: Gtk::Adjustment ignores initial	value in
      constructor (gtkmm (bugzilla.gnome.org))


----------------------------------------------------------------------

Message: 1
Date: Thu,  2 Nov 2006 10:22:43 +0000 (UTC)
From: "gtkmm (bugzilla.gnome.org)"
	<bugzilla-daemon bugzilla gnome org>
Subject: [gtkmm bugzilla] [Bug 369335] New: Gtk::Adjustment ignores
	initial	value in constructor
To: gtkmm-forge lists sourceforge net
Message-ID: <bug-369335-5595 http bugzilla gnome org/>
Content-Type: text/plain; charset=utf-8

Do not reply to this via email (we are currently unable to handle email
responses and they get discarded).  You can add comments to this bug at
http://bugzilla.gnome.org/show_bug.cgi?id=369335

  gtkmm | general | Ver: 2.9.x

           Summary: Gtk::Adjustment ignores initial value in constructor
           Product: gtkmm
           Version: 2.9.x
          Platform: Other
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: general
        AssignedTo: gtkmm-forge lists sourceforge net
        ReportedBy: dholbach ubuntu com
         QAContact: gtkmm-forge lists sourceforge net
     GNOME version: Unspecified
   GNOME milestone: Unspecified


Forwarded from:
https://launchpad.net/distros/ubuntu/+source/gtkmm2.4/+bug/69806

Gtk::Adjustment seems to ignore the initial value it is given in its
constructor. In the attached example, an adjustment is initialized to 1 and
used with a SpinButton. When you run it though, the SpinButton has a value of 0
and get_value() returns 0. Using set_value() in the Window's constructor, on
the other hand, correctly sets the initial value.

I was able to reproduce this bug on two computers running Ubuntu 6.10 but not
on another one running Ubuntu 6.06. Using older versions of GCC doesn't seem to
help.

See attached sources files.

http://librarian.launchpad.net/4945898/main.cpp
http://librarian.launchpad.net/4945899/Makefile


On a brief glance:

Code in gtkmm 2.8.5:
Adjustment::Adjustment(double value,
                       double lower, double upper,
                       double step_increment, double page_increment,
                       double page_size)
:
  Glib::ObjectBase(0), //Mark this class as gtkmmproc-generated, rather than a
custom class, to allow vfunc optimisations.
  Gtk::Object(Glib::ConstructParams(adjustment_class_.init(), (char*) 0))
{
  gobj()->lower = lower;
  gobj()->upper = upper;
  gobj()->step_increment = step_increment;
  gobj()->page_increment = page_increment;
  gobj()->page_size = page_size;
  changed();

  set_value(value);
}

void Adjustment::set_value(double value)
{
    gtk_adjustment_set_value(gobj(), value);

}

(For some reason set_value() doesn't use
  gobj()->value = value;
  changed();
as the other set_*() do. But maybe that's a red herring.)

----

Code in gtkmm 2.10.2:
Adjustment::Adjustment(double value, double lower, double upper, double
step_increment, double page_increment, double page_si
ze)
:
  Glib::ObjectBase(0), //Mark this class as gtkmmproc-generated, rather than a
custom class, to allow vfunc optimisations.
  Gtk::Object(Glib::ConstructParams(adjustment_class_.init(), "value", value,
"lower", lower, "upper", upper, "step_increment
", step_increment, "page_increment", page_increment, "page_size", page_size,
(char*) 0))
{
  }


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