Fix zooming and sliding of the waveform view in AudioFileProcessor

[szeli1]

closes #7375

fixes partially #7074

I have fixed some issues with the graph:

• sliding the start, loop, end indicator
• sliding the waveshape
• zooming in
• possibly segfaults

The sliding and the zooming was separated in mouseMoveEvent, if the user starts sliding or zooming, they will no longer be able to zoom or slide until next mouse press.

[Rossmaxx]

fixes partially #7074

can you fully fix it? with help from @michaelgregorius

[Rossmaxx]

some minor thoughts

[szeli1]

can you fully fix it? with help from @michaelgregorius

I would appreciate some help, but it isn't strictly needed.

[sakertooth]

Small code suggestions here. Will try to test later.

[bratpeki]

I'll test this ASAP.

[bratpeki]

When looking at this initially, it seems perfectly fine. I'll install it on my system at test it, you'll have more opinions from me in a few days.

@Rossmaxx says some users mentioned it didn't solve the issue for them. Would you like any info regarding my system and building process?

[szeli1]

@Rossmaxx says some users mentioned it didn't solve the issue for them. Would you like any info regarding my system and building process?

I'm hearing about this for the first time. I've changed how thing work so I'm not sure what is exactly the issue they are experiencing. I would like to hear info about what is the problem firstly. Thank you for reviewing it and communicating the issue. I would like to know how the testing goes.

[bratpeki]

@szeli1, what do the second and third point mean? I would like to be sure I've tested them, so if you could elaborate on them more, that would be terrific!

[szeli1]

@szeli1, what do the second and third point mean? I would like to be sure I've tested them, so if you could elaborate on them more, that would be terrific!

In other words:
I need to know what is the issue that they are talking about ("says some users mentioned it didn't solve the issue for them"). Thank you for notifying me that there is an issue and thank you for deciding that you will test this. I meant to say this by the last 3 sentences.

[bratpeki]

Oh, no, not that, that's something @Rossmaxx mentioned on Discord. I'm talking about "sliding the waveshape" and "zooming in". I would like you to elaborate on those in a bit more detail, so I can make sure I have tested them properly.

[sakertooth]

Haven't tested it, but the changes look sane.

[sakertooth]

Just tested it, it works a lot better now 👍. We should still address the outstanding comments if possible before merge though.

[szeli1]

I'm talking about "sliding the waveshape" and "zooming in".

Dragging the waveshape left and right or up and down.

[bratpeki]

LGTM, we've discussed the fact that sometimes sliding happens instead of zooming, and vice versa, but I believe this is the minor mouse/trackpad twitches, so it's fine.

If you still want to work on that, I'm more than willing to test it!

[Rossmaxx]

Looks good so far.