Synchronize an QOpengl line with audio file
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@mrjj When i use redLine =0, it gives me this result:
so 160 is the space between the small grey lines
and 320 is just a number that i added so the red line will be in the same line with my slider
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@HW-Developer
so the redline default offset is 320+160.
so if you add to that, it will move the redline.
Do you mean to hook up the slider so it moves the redline or what is task? -
@mrjj The slider was my first test so to have the same result i did have with my slider i initialize the red line on the same line with that slider so when the audio is playing, they will be moving in the same time
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@HW-Developer
ok.
so now you want a method in QOpenglWidget that also moves the redLine ? -
@HW-Developer
Ok, i assumed you subclassed it ?
like
class MyGLWidget : public QOpenGLWidget ...so you can just add a new method to it to alter the redLine variable.
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@mrjj Yes of course i already did what is necessary to have the drawing ruler that i upload it above
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@HW-Developer
ok but you question was
" how to create positionchanged method in my QOpenglWidget class,"
so i must be missing something you ask about ?
(if you already did make such method) -
@mrjj I already draw the qopenglwidget but I did not synchronize it with the audio file using positionchanged method that I did ask you about
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hi
well you can hook up the AUDIO positionchanged
signal to your own method (slot)
using connect.
http://doc.qt.io//qt-5/signalsandslots.htmlso it will directly call your method when it changes.
