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authorzecke <zecke>2002-09-21 15:29:37 (UTC)
committer zecke <zecke>2002-09-21 15:29:37 (UTC)
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THE OPIE PIM Design.....
I did not know what to write
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1Hija to the DESIGN of our OPIE PIM stuff
2
3This design was firstly discussed in the train
4from Frankfurt to Hannover between me (zecke ) and eilers.
5
6We had a look at our pim implementation and the one from
7trolltech and we looked what was missing.
8
9GOALS:
10 - clean implementation
11 - share code
12 - ObjectOriented Design
13 - Scalable
14 - Integration into common solutions like STL and Qt
15 - Addition
16 - Ease of Use
17
18GENERAL:
19 - use templates
20 - have a common base class for all Records OPimRecord
21 - use references instead of pointers
22 - make use of QShared internally memory consumption
23
24We've a 'public' and 'private' part in our lib
25OPimAccessTemplate is the public part. This will be used
26by 3rd party developers to access the PIMs.
27OPimAccessBackend is the backend. You could also call it
28resource.
29
30Both things need to be implemented for different kind of records.
31By using templates we can make sure we share code and the reason
32not to use simple inheretance is that we can specialise quite easy.
33
34For example we have OTodoAccess : public OPimAccessTemplate<OTodo>;
35the we would do
36OTodoAccess::List list = otodoAccess.all();
37OTodoAccess::List::Iterator it;
38for( it = list.begin(); it != list.end(); ++it );
39
40
41as you can see from here it just behaves like you expect from Qt or STL.
42
43The kewlest thing is that List and List::Iterator is free to use if you
44want to implement your own OPimAccessTemplate.
45You just have to sub class it and voila you're done
46
47
48Hope you enjoy using OPIE PIM
49
50regards Holger 'zecke' Freyther \ No newline at end of file