Hi Ferran,
The waveforms are a little twisty-turny. Here are some hints to get you
started:
WaveformMark represents the skin's definition of what the hotcue should be
rendered as (an image from file, an auto-generated image, the text to show,
etc.). WaveformRenderMark is a WaveformRendererAbstract class that takes a
WaveformMark and draws it to the screen when its turn comes.
A waveform widget has a stack of WaveformRendererAbstract classes in a list
that are drawn one after the other -- they're like layers. A typical
waveform widget's render stack looks like this:
* background (WaveformRenderBackground)
* end of track highlight (WaveformRendererEndOfTrack)
* preroll drawing (WaveformRendererPreroll)
* mark range (green loop highlight) rendering (WaveformRenderMarkRange)
* signal rendering (the waveform itself -- a class named something like
WaveforRenderXXXSignalXXX depending on the widget)
* beat rendering (WaveformRenderBeat)
* hotcue / cue / loop in-out point rendering (WaveformRenderMark)
So WaveformRenderMark uses WaveformMark as a description of what to draw.
WaveformMark doesn't have access to the track that's loaded while
WaveformRenderMark can get access. Here's an example from
WaveformRenderBeat:
https://github.com/mixxxdj/mixxx/blob/master/src/waveform/renderers/waveformrenderbeat.cpp#L41
One tricky bit is that WaveformRenderMark pre-generates a pixmap that is
drawn during the render step as a performance optimization. In the draw
method of WaveformRenderMark you should set the text of the currently
loaded cue point's label (you can fetch the cues from the track with
TrackInfoObject::getCues) on the WaveformMark (via some new method you
add). If the label changed since the last render then you'll need to
re-generate the pixmap.
Hope that gets you started,
RJ
On Fri, Jan 9, 2015 at 6:02 PM, Ferran Pujol Camins <
ferranpujolcam...@gmail.com> wrote:
> Now I want the hotcue marks to show their cue's name. I see in
> WaveformMark::setKeyAndIndex that m_text place marker is replaced by the
> hotcue number so I could just append the cue's label there. But I have no
> clue about how to bring the hotcue name to this function. Some quick
> guidance with the waveform rendering system will help a lot :)
>
> 2015-01-09 20:31 GMT+01:00 Ferran Pujol Camins <
> ferranpujolcam...@gmail.com>:
>
>> Thank you both I have a better picture now. :)
>>
>> 2015-01-09 19:55 GMT+01:00 RJ Ryan <russelljr...@gmail.com>:
>>
>>> This doc is a bit out of date now (doesn't cover ControlObjectSlave) but
>>> it gives the overview of what the heck ControlObject is used for in Mixxx:
>>>
>>> http://mixxx.org/wiki/doku.php/developer_guide_control
>>>
>>> See also: http://mixxx.org/wiki/doku.php/developer_guide
>>>
>>> On Fri, Jan 9, 2015 at 6:19 AM, Daniel Schürmann <dasch...@mixxx.org>
>>> wrote:
>>>
>>>> Hi Ferran,
>>>>
>>>> do not know what exactly you need.
>>>>
>>>> ControlDoublePrivate is th container that holds the double data value
>>>> for atomic read and writes (also on 32 bit targets).
>>>> The ControlObject is the interface, you can use from your code that
>>>> holds a reference to the ControlDoublePrivate.
>>>>
>>>> ControlObject should be used to create a new ControlDoublePrivate and
>>>> should only be used from one object (You will find exceptions in the legacy
>>>> engine code)
>>>>
>>>> All other Objects should use the ControlObjectSlave to access the
>>>> underlying ControlDoublePrivate.
>>>>
>>>> Hope that helps.
>>>>
>>>>
>>>> Kind regards,
>>>>
>>>> Daniel
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> 2015-01-09 11:16 GMT+01:00 Ferran Pujol Camins <
>>>> ferranpujolcam...@gmail.com>:
>>>>
>>>>> Hello, could someone give me a short explanation about how
>>>>> ControlObject and ControlDoublePrivate interact? I'm quite confused right
>>>>> now and it would help me digest the code quicker.
>>>>>
>>>>>
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>>>>
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>>>
>>
>>
>> --
>> Ferran Pujol Camins
>>
>
>
>
> --
> Ferran Pujol Camins
>
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