Tables and tree tables in Spec inplement a mechanism to edit string columns in place

in Spec, string columns can be edited by just declaring the column to be editable sending the beEditable message and adding a callback to process the edition by sending onAcceptEdition:, which receives two parameters, the object being editing and the edited string.

The following code will show how this can be done:

app := SpApplication new.
app useBackend: #Gtk.
 
presenter := SpPresenter new.
presenter application: app.

presenter layout: (SpBoxLayout newTopToBottom
    add: (tablePresenter := presenter newTable);
    yourself).

tablePresenter 
    addColumn: (SpStringTableColumn title: 'R/O' evaluated: #key);
    addColumn: ((SpStringTableColumn 
            title: 'Editable' 
            evaluated: #value)
        beEditable; 
        onAcceptEdition: [ :anAssociation :aString | anAssociation value: aString ];
        yourself).

tablePresenter items: { 1 -> 'One'. 2 -> 'Two'. 3 -> 'Three' }.
    
presenter asWindow 
    title: 'Example editing cells';
    open

This will produce (with the Gtk3 backend) this output: