From: Joe Laughlin <Joseph.V.Laughlin@...>
Date: 2004-08-17T03:51:03+09:00
Subject: Re: GTK weirdness

Joao Pedrosa wrote:
> Hi,
>
> --- Joe Laughlin <Joseph.V.Laughlin@boeing.com> wrote:
>
>> I'm creating a Gtk::TreeViewColumn and attaching its
>> model to a
>> Gtk::ListStore.  The liststore is created to have
>> one column of type Object.
>> I then create a bunch of columns  and renderers and
>> and call
>> set_cell_data_func() on each column, setting the
>> renderer.text attribute to
>> equal some atribute in an object that's contained in
>> the Gtk::ListStore.
>>
>> (hope that makes sense!)
>>
>> So when I run the application, I get a bunch of
>> these warnings when I move
>> my mouse over the treeview:
>>
>>  GLib-GObject-WARNING **: unable to set property
>> `text' of type `gchararray'
>> from value of type `VALUE'
>>
>> Ideas?
>
> On Windows 2000, ruby 1.8.2 (2004-06-29)
> [i386-mswin32], with the "One Click Ruby Install"
> (OCRI), GTK 2.4.3 by Tor, Ruby/GTK from the CVS, I was
> able to create the following example, which seemed to
> work fine. By the way, great Idea. :)
>
> ---->--- cut ---->-----
> require 'gtk2'
> include Gtk
>
> def create_treeview
>   model = ListStore.new(Object)
>   treeview = TreeView.new(model)
>   3.times{|n|
>     column = TreeViewColumn.new
>     column.set_title("Etc#{n}")
>     text_renderer = CellRendererText.new
>     column.pack_start(text_renderer, true)
>     text_renderer.signal_connect('edited'){|cell,
> path, value| }
>     column.set_cell_data_func(text_renderer){|column,
> cell, model, iter|
>       cell.text = iter[0][n].to_s
>     }
>     treeview.append_column(column)
>   }
>   fill_random_data model
>   treeview
> end
>
> def fill_random_data model
>   10.times{|i|
>     iter = model.append
>     iter[0] = ["one#{i}", 2 + i, "three#{i}"]
>   }
> end
>
> Gtk.init
> w = Window.new
> w.signal_connect('destroy'){ Gtk.main_quit }
> w.title = 'A Test'
> w.set_default_size 500,400
> w.add(create_treeview)
> w.show_all
> Gtk.main
> ---->--- cut ---->-----
>
> Cheers,
> Joao
>
>
>
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Thanks for the information.

I tracked it down to how I created the TreeViewColumn.  I was setting :text
equal to 0 when creating the TreeViewColumn, which tells the TreeViewColumn
to try to find the text for the column in the first column of the model,
which is an Object.  So when I removed ":text = 0", it worked.

Joe