Pinch to zoom no longer works on OSX, causing unwanted jump to 1% zoom

[bfod]

in .15 I could pinch-to-zoom in OSX, but in .16 if I pinch at all it jumps to 1% zoom and can't be zoomed back. That would be a non-fatal bug, except the pinch gesture is often detected in OSX so the display is often unwantedly jumping to 1% zoom.

[bjorn]

That's bad news. Unfortunately, I have no way to test this myself. :S

Since I don't think I changed anything related to this in Tiled 0.16, I fear it may be a Qt bug. I'll have to check which version of Qt Tiled 0.15 was built against to see if it could be a regression. Also, could you try if this still happens in the current snapshot, which is built against Qt 5.6?

https://update.mapeditor.org/snapshots-osx/

[pouwelsjochem]

Hi Bjorn,

I just had a look at the new OS X snapshot.. It's different :p It does not go to 1% anymore, but what happens now is the following:

200% zoom
pinching to zoom
It starts zooming, but get's pulled back again every frame or so, something like this happens (made up numbers): 200% -> 210% -> 201% -> 220% -> 203% -> 236% -> 206%
stopped pinching, zoom stopped at 206%
but expected zoom to be more like 250% or something

I hope this makes sense, if extra information is needed for debug I could record my screen.

[bjorn]

Tiled 0.17 was released against Qt 5.7. Did that change anything regarding this issue?

[pouwelsjochem]

Hi, sorry for the late reply.
I am using Tiled 0.18 but the issue is still here.
Do you want me to make a screen recording?

[bjorn]

@pouwelsjochem I'm sad to hear it's still there. A recording could be illustrative. Ultimately, I'm wondering how to reproduce this issue myself. I recently got a Wacom Intuos Pro and I wonder if I could reproduce it if connected to my Mac Mini.

[pouwelsjochem]

Ah alright, perhaps that will also result in the same bug. But for now, here's the video :)
Video

Explanation of what is happening:

• I start off with a very slow 'pinch to zoom', which jumps back all the time
• At around 0:06 I do a quick 'pinch to zoom', this does work
• At around 0:10 I start doing the same as the first 2 steps but with zooming-out

[necrotek]

Pinch to zoom also does not work with windows 10 tablet mode Tiled v 0.18.2. I am not sure if this is a related issue so did not want to start a new topic. 2 finger swipe to move the map Does not work either. It moves the map but snaps back to the original location on release.

[bjorn]

@necrotek Ah, thanks for mentioning that. I think that should be possible for me to reproduce, and if I can fix that then we can see if it also fixes the problems on macOS

[bjorn]

Alright, I can reproduce this also on my Mac Mini with an Intuos Wacom tablet. Will see if I can find an issue in the code.