Re: Printing and blocking ui

[Yevgen Muntyan <muntyan tamu edu>]

Alexander Larsson wrote:

> On Thu, 2006-06-15 at 14:04 -0500, Yevgen Muntyan wrote:
>  
>
> > Hi there,
> >
> > I print a text document from GtkTextView here. There is a problem
> > with pagination: pagination is potentially slow, so some sort of progress
> > dialog should be shown during it. From the other hand, the text buffer
> > must not be modified during pagination.
> > How to solve it? Should I show my own modal dialog and make sure user
> > doesn't modify the buffer, or GtkPrintOperation can take care of it?
> >    
>
> This is supported now with the Gtkprintoperation::paginate signal and
> gtk_print_operation_set_show_progress().
>  
I don't know how paginate works, but the dialog which shows
up during printing is not modal, and it appears only after some
delay. I can erase text in the buffer between clicking Print button
and the time when progress dialog appears.

> > Actually, it would be good to ensure printing blocks the text widget too,
> > since in this case it wouldn't be necessary to calculate and store all 
> > the pango
> > layouts in begin-print. Maybe just show a modal dialog between begin-print
> > and end-print.
> >    
>
> Locking the editing widget is probably something you have to do
> yourself. You could also do a snapshot of the data at print time.
>  
Well, locking is easy, but I have to tell user about what's
happening. So I guess the solution is to have my own modal
progress dialog.

Regards,
Yevgen