Re: Printing and blocking ui

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
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.


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