Re: [jazzplusplus-devel] Selection

[Joakim V. <jo...@ve...>]

Dave Fancella wrote:

>
>The dialog explains everything! :)  So, when you select, the GUI sets the 
>filter to the events you selected.  Then, when you copy or cut, the GUI uses 
>the filter to copy or cut the events from the track into the clipboard.  Then 
>when you paste, it just copies events from the clipboard into the track.  
>Hurray!  ;)
>
>So I'm thinking we should keep the Filter around but put it in jppProject 
>rather than have it hanging around as a global variable.
>  
>
That sounds about right...

Im not shure any copying is done until very late in the process.

That is because the selection + filter is used as a source for a number 
of commands.

So I dont think there really is a clipboard in the classical sense, just 
a way to indicate
which events you want to act on, and different commands that take this 
notion of selected
events as argument, and then acts on them.

/Joakim

>Dave
>
>  
>
>>/Joakim
>>
>>Dave Fancella wrote:
>>    
>>
>>>All,
>>>
>>>Ok, now I'm pretty thoroughly confused, again.  :(  I'm working on making
>>>selection and the clipboard exist inside jppProject instead of inside the
>>>GUI.  Here's what I've got:
>>>
>>>With an empty project, I can select events.  There aren't any to select. 
>>>When I load a midi file, selection doesn't work anymore at all.  (I may
>>>have broken that, sorry!)
>>>
>>>I'm thoroughly confused for several reasons.  First, I'm not very good at
>>>graphics/GUI stuff when I have to build my own, so I use stock widgets
>>>pretty much all the time.  :)  So I don't understand the drawing code all
>>>that well, well, not at all, really.  Second, the selection code is
>>>extremely convoluted.  I've narrowed it down, I think.
>>>
>>>It looks like when you're done selecting, jazz uses a Filter object to
>>>store the selection.  I feel like Marty McFly, but what the hell's a
>>>Filter?  ;) So when you do have a selection with real events in it, do
>>>the events get copied to the filter object, or does the filter object
>>>just store locations of those events?
>>>
>>>Dave
>>>      
>>>
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