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Add Undo and Redo to Your Web Application With Cappuccino
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05/15/2009, by Francisco Tolmasky
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Cappuccino has built-in support that can allow you to plug undo and redo right in by just by adding a few lines of code. In this tutorial, we will be exploring how to add sophisticated undo and redo support to a graphical application in the browser. We won’t be creating the entire application from scratch however, but instead building off of an existing example. We’re doing this for two reasons. For starters, we don’t want to get distracted from our main task by having to wade through unrelated code. Instead we’ll simply review whatever code we need to as we get to it.
More importantly, the sample provided is complex enough to serve as a true real-world example, as opposed to the contrived code we’d be forced to put together in the limited scope of space and time of this tutorial. This also has the benefit of displaying the modular nature of undo support in Cappuccino, and how we can add it to an application without knowing every detail of its implementation.
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