Allow zoom with trackpad

[roomrys]

Description

This PR allows zooming with the trackpad on a laptop. Zooming with the trackpad actually passes a MouseButton into the events.buttons(), so previously this was being passed over in the wheelEvent.

Now, we just check that the event modifier is not the Alt key (which is the only other action that uses the wheelEvent - for rotating an instance about a node).

Types of changes

• [ ] Bugfix
• [x] New feature
• [ ] Refactor / Code style update (no logical changes)
• [ ] Build / CI changes
• [ ] Documentation Update
• [ ] Other (explain)

Does this address any currently open issues?

• 1528

Outside contributors checklist

• [ ] Review the guidelines for contributing to this repository
• [ ] Read and sign the CLA and add yourself to the authors list
• [ ] Make sure you are making a pull request against the develop branch (not main). Also you should start your branch off develop
• [ ] Add tests that prove your fix is effective or that your feature works
• [ ] Add necessary documentation (if appropriate)

Thank you for contributing to SLEAP!

:heart:

Summary by CodeRabbit

• Refactor: Updated event handlers and function calls in sleap/gui/widgets/video.py for improved code readability and maintainability.
• Style: Removed unnecessary empty lines and if conditions in sleap/gui/widgets/video.py to streamline the code.
• New Feature: Adjusted zoom behavior in sleap/gui/widgets/video.py for a more intuitive user experience.
• Chore: Minor graphical element manipulations in sleap/gui/widgets/video.py for better UI consistency.

[codecov[bot]]

Codecov Report

Merging #1540 (c8e9a8e) into develop (ed77b49) will decrease coverage by 0.01%. The diff coverage is 50.00%.

@@             Coverage Diff             @@
##           develop    #1540      +/-   ##
===========================================
- Coverage    73.39%   73.39%   -0.01%     
===========================================
  Files          134      134              
  Lines        23961    23961              
===========================================
- Hits         17586    17585       -1     
- Misses        6375     6376       +1     

Files	Coverage Δ
sleap/gui/app.py	75.34% <ø> (ø)
sleap/gui/widgets/video.py	64.34% <50.00%> (ø)

... and 1 file with indirect coverage changes

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[coderabbitai[bot]]

Walkthrough

The proposed changes primarily focus on refining the user interface and improving the user experience. They include minor adjustments such as removing empty lines and unnecessary conditions, as well as significant modifications related to zoom behavior, event handling, and graphical element manipulation.

Changes

File Path	Summary
sleap/gui/app.py	An empty line was removed in the dropEvent method.
sleap/gui/widgets/video.py	Various changes were made, including adjustments to zoom behavior, event handlers, and function calls. Also, the creation and manipulation of graphical elements were updated.

🐇

In the land of code, where the brackets lie,

Changes small and large, under the digital sky.

Zooming, dropping, handling events,

Each line of code, makes a difference immense.

So here's to the coder, with their keen sight,

Making the user's journey, ever so light. 🎉

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[roomrys]

This needs to be revisited with a different approach