Re: [Help-smalltalk] GtkComboBox doesn't understand me...

[Joachim Jaeckel]

Hello Paolo,

thanks for your support! :-)

I got it! :-D

But maybe I've a small extension to the ComboBox Object. But please read on:

The source-code you send, brought me to the right place to look. I had 
completely overseen the CellRenderer part. But the ComboBox doesn't 
provide an "insertColumn" method. So I tried to look for a GTK-Tutorial, 
which handles these. On the gtk.org WEB-Site, the tutorial about a 
ComboBox doesn't subscribe the "model way", so I had to look on other 
places. I found a pygtk-description where I saw that they provide a 
Method "packStart" to the ComboBox. And I found a C-source which does a 
"gtk_cell_layout_pack_start(GTK_CELL_LAYOUT(combo), cell, TRUE);"

So the solution would be (I don't know, if it's the right place for the 
methods or if you would place them to another class, but it's likely to 
the pygtk description) an extension for the ComboBox like this one:

GTK.GtkComboBox extend [

    packStart: cell expand: expand [
        <cCall: 'gtk_cell_layout_pack_start' returning: #void
            args: #( #self #cObject #boolean )>
    ]

    addAttribute: cell attribute: attribute column: column [
        <cCall: 'gtk_cell_layout_add_attribute' returning: #void
            args: #( #self #cObject #string  #int)>
    ]
]

or would you prefer somthing like setLayout to the comboBox which 
handles a GtkCellLayout, but I don't know how this could be managed, 
currently.

Regards,
Joachim.

Paolo Bonzini schrieb:
> Joachim Jaeckel wrote:
> > Hello Paolo,
> >
> > thanks for your answer!
> >
> > > I think you need to connect the text of the combobox to column 0 of the
> > > model?  (See example-tree.st).
> > But isn't that, which I did with:
> > "setOop: iterator column: 0 value: 'One'." ?
> >
> > Or am I wrong?
>
> The model is a table of information, but you have to connect the model
> to the view explicitly.  Here is the relevant code for GtkTreeView, I
> think it should be similar for comboboxes:
>
>         col := GtkTreeViewColumn new.
>         treeView insertColumn: col position: -1.
>         col setTitle: 'Class'.
>         col packStart: (rend := GtkCellRendererText new) expand: true.
>         col
>             addAttribute: rend
>             attribute: 'text'
>             column: 1.
>         treeView setModel: tree.
>
> Paolo