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"The attached patch adds a progress dialog to the dialogs available to scripts. Create
it by:
d = TW.progressDialog( parent )
Then, you can set the range by
d.setRange( min, max )
the label (indicating what the script is currently doing) by
d.setLabelText( str )
and the current value by
d.setValue( val )

The dialog will open when it is created, and will close when the max value of the
range is reached (you can also close it prematurely by d.reset()).
Note: Right now, the cancel button is removed from the dialog as there is no default
way to determine whether it was clicked or not from a script.

N.B. This dialogue needs to call .deleteLater() when you are finished with it.



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