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List:       gtkmm
Subject:    Re: [gtkmm] TreeView selection question
From:       Marco <schwein () chello ! nl>
Date:       2004-09-29 17:33:42
Message-ID: opse3m2geq4qw8xz () mail ! chello ! nl
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On Wed, 29 Sep 2004 10:57:45 -0400, Carl Nygard <cjnygard@fast.net> wrote:

> On Wed, 2004-09-29 at 03:57, Marco Scholten wrote:
>> ----- Original Message -----
>> From: "Carl Nygard" <cjnygard@fast.net>
>> To: <gtkmm-list@gnome.org>
>> Sent: Wednesday, September 29, 2004 5:05 AM
>> Subject: [gtkmm] TreeView selection question
>>
>>
>> >
>> > I have a treeview with two columns, first is a simple check button,
>> > second column is a label.
>> >
>> > I'd like to be able to toggle the check buttons in various rows 
>> without
>> > actually selecting the row.
>> >
>> > But of course, I don't know how to accomplish that.  Clues???
>> >
>> > Regards,
>> > Carl
>> >
>> > _______________________________________________
>> > gtkmm-list mailing list
>> > gtkmm-list@gnome.org
>> > http://mail.gnome.org/mailman/listinfo/gtkmm-list
>> >
>>
>> Maybe this will help, taken form
>> http://www.gtkmm.org/gtkmm2/docs/tutorial/html/ch08s04.html
>>
>> Preventing row selection
>>
>> Maybe the user should not be able to select every item in your list or 
>> tree.
>> For instance, in the gtk-demo, you can select a demo to see the source 
>> code,
>> but it doesn't make any sense to select a demo category.
>>
>> To control which rows can be selected, use the set_select_function() 
>> method,
>> providing a SigC::Slot callback. For instance:
>>
>> m_refTreeSelection->set_select_function( SigC::slot(*this,
>> &DemoWindow::select_function) );
>>
>> and then
>>
>> bool DemoWindow::select_function(const Glib::RefPtr<Gtk::TreeModel>& 
>> model,
>>                                  const Gtk::TreeModel::Path& path, bool)
>> {
>>   const Gtk::TreeModel::iterator iter = model->get_iter(path);
>>   return iter->children().empty(); // only allow leaf nodes to be 
>> selected
>> }
>
> That's fine, but how do I decide to ignore it?  The problem is that I
> only want to ignore the selection if the checkbox was toggled, but I
> don't know that information.  Unless the Path tells me which cell was
> chosen?
>
> _______________________________________________
> gtkmm-list mailing list
> gtkmm-list@gnome.org
> http://mail.gnome.org/mailman/listinfo/gtkmm-list

Experiment a little with Gtk::CellRendererToggle::signal_toggled () to 
detect if the checkbox was toggled or 
Gtk::TreeViewColumn::signal_clicked() to detect wich column was clicked, 
set some variable like last_clicked_column, and return 
(last_clicked_column != 0) in DemoWindow::select_function()
I don't know if this will work because i don't know if these signals get 
fired before or after the select function.

Regards,
  Marco
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