vertically-split plots become decoupled when one is dragged

[v4hn]

encountered with version 3.4.3 (ROS noetic)

Steps to reproduce:

split plots vertically and add related time series:

zoom in to one plot, the other plot aligns on the x axis:

drag top plot with middle mouse button. X axis of bottom view should follow, but does not:

[facontidavide]

drag top plot with middle mouse button

I don't think you can drag and drop with middle mouse. I surely can't on my computer

[v4hn]

I'm sure I can (and I actually don't remember a time I couldn't).
Here's a screen recording: MP4/H264 / WEBM.
Notice how

• the cursor changes to a "drag" shape when middle mouse button is pressed
• dragging leaves the other plot not moving
• zooming in/out realigns the two plots
• by dragging I can actually move past the end of the data series (towards the end of the video)

It seems you/plotjuggler were just not aware of the callbacks for this?
I just made this screencast with Qt5.15.2 / qwt6.2.0 / ROS noetic / PlotJuggler commit d1544ff (almost current main), but I can definitely reproduce (at work) with a standard Ubuntu 20.04 / ROS noetic released plotjuggler.

[Bartimaeus-]

Am able to reproduce the bug on Windows with commit e4ee67b:

Plotjuggler.Drag.-.Issue.642.mp4

[facontidavide]

fixed

[v4hn]

Thank you so much! 💐

I am wondering whether it might feel better to move all plots around already on drag and not just on drop for "smoother" user experience, but I absolutely love the fix as is, so I will close this issue. 🦕