Hello,
I completed drag&drop this weekend but i'm unhappy with it. The existing
implementation is relying on copyrighted code and the only way to finish
it was to copy more copyrighted code. Even with refactoring you can see
some pretty big fingerprints from borland. To avoid copyright questions
it would be best to rewrite the code, a necessary step i'm afraid
(unless somebody has better ideas?).
In order to do this we need to establish what interface is needed, but
first we need to decide if we need to be compatible with delphi. If we
want 100% compatibility we end up quickly with roughly the same code. if
we dont i don't think it has a huge impact as not many people are using
drag&drop. Also the current implementation uses wndproc messaging and i
would like to avoid that as much as possible (not sure if it can be
avoided though), so that would be the first break in compatibility.
What i have in mind for a new implementation is to replace the drag&drop
code in controls.pas with abstract classes. I would like to seperate the
drag&drop into a DragManager and DropManager. The managers could be in
TApplication so they can be replaced and tested seperately without
recompiling Lazarus.
Besides drag&drop are there any things you would like to see implemented
in a new approach? For instance Mattias wants autodocking and he wants
to save the dock-layout (desktop ideas?)
Youre ideas, opinions and observations please
Greetings,
Marius
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