- perform scanning in a thread
- change the label of the scan button
- trigger cancel with the same button and with the ESC key
- process all GUI updates in asynchronous mode.
Do not use a top window as parent of popups:
- If a top window goes away in an application with multiple instances of
XInsaneWidget, any call to a scanner widget leads to a crash.
Minor changes.
Place one or multiple stamps on scanned pages in defined locations.
A stamp is understood here as
- a transparent text in a transparent frame with no borders
- an opaque text on an opaque background with no borders.
Stamp parameters:
- text
- font
- foreground colour
- background colour
- angle of rotation
- transparency.
Locations:
- centre
- cardinal directions
- inter-cardinal directions.
