Enhancement: Before/After lock-unlock (see issue 1017)

Lock: keep the Before view unchanged -
useful to evaluate the cumulative effect of multiple tools.
Additionally, comparison can be made to any state in the History

Unlock: the Before view will follow the After view 1 step behind,
showing image before the effect of the currently used tool
This commit is contained in:
michael
2011-09-26 22:45:00 -04:00
parent 73e8f043ee
commit ea5a0dfb72
7 changed files with 40 additions and 7 deletions

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