What does "Destroy Changeset" mean?When I do this,
changes I made in this Changset are still there.
>Welcome John,
>
>--- John Denver <magesmail at yahoo.com> wrote:
>> I want the following effect.
>> 1.i create a category in which i create new classes,
>> play around with them till I am satisfied.
>
>In Smalltalk, there is a concept called a "Change
>Set". There can be many change sets present in any
>Smalltalk image, and they basically record all of the
>modifications that you do to the image from the point
>of creating that change set onwards. If you click on
>the Squeak desktop, you get a main menu. Choosing the
>"open" item, and then the "simple change sorter" will
>open up a single view change set window. You'll see
>all of the change sets there that other programmers
>have created, and when you check out the menu for that
>window, you'll see that there is an option for a "new
>change set...". There is also a "make changes go to
>me" item which establishes the currently selected
>change set as the active one in use. Every time you
>accept a new class definition, a new method or
>whatever in a browser, those details are moved into
>the change set. Basically, the change set is like
>documenting all the things you did to the image
>(code-wise) to put it in it's current state. Imagine
>that when the system files in the change set, it's
>actually building back that code into the image, thus
>restoring your established state.
>Once you create a new change set, and make the changes
>go to it, create a new category in a browser called
>"MyCategory". Within that category, you'll make new
>classes, modify existing, and all of this work get's
>recorded in your change set. So if you create a stack
>of classes, and extent exisitng ones in other
>categories, the entire effort is recorded in full
>detail (have a look at the info that the change set
>holds).
>
>> 2.When i'm done I file out this category (let's call
>> it MyCategory) and I get a nice MyCategory.st file.
>
>Go to your "MyCategory" change set, and choose "file
>out" from the window menu. A MyCategory.cs file will
>be created in the same folder as Squeak. This is now
>your own personal copy of all the work you did on-top
>of the existing image, ready to be filed back into
>another image. Remember that all of the changes you
>did to anything, be it a new class, an existing class,
>renaming, whatever, will be constructed by Squeak as
>it reads in the change set.
>
>> 3.I exit squeak *without* saving!!
>If you're building up an image, then just save. The
>good thing about Smalltalk, is that you can treat an
>image as your development world. You don't always use
>one image, you may have a folder full of em. You might
>also be developing a sub-system in one, file it out,
>and then file it back into a new fresh clean compacted
>one, ready for distribution.
>
>> 4,When I start squeak again I want to open the
>> MyCategory.st file and invoke a "filein".
>> What I want to do is for this category to appear in
>> the Browser window so I can continue adding classes
>> etc.
>
>Once you file back in, if it isn't already a defined
>change set, it'll be added to the change set
>collection. Don't forget to "make changes go to me",
>so that any further work you do is being sent to that
>change set.
>
>No Worries,
>Ali.
>
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            JacobFan
            JacobFan123 at telekbird.com.cn