Up/down arrow key events captured by browser

[pllim]

UPDATE: I also see this on RHEL 7 64-bit using Firefox 52.8.0.

Discovered during Scipy 2018. While panning using Ginga viewer with ipyevents, the up/down arrows where somehow captured by the browser. This resulted in notebook jumping up and down, instead of panning up and down. I was running eteq/astrowidgets#1 on Windows 7 64-bit:

• Python 3.6.5
• Numpy 1.14.5
• Astropy 3.1.dev22186
• Ginga 2.7.1.dev1944
• ipyevents 0.3.1
• freetype 2.8.1
• aggdraw from https://github.com/ejeschke/aggdraw/tree/vectorized-drawing
• jupyter 1.0.0
• jupyter_client 5.2.3
• jupyter_console 5.2.0
• jupyter_core 4.4.0
• jupyterlab 0.32.1
• jupyterlab_launcher 0.10.5

I think I see the image did pan like a few pixels but I am not sure because the browser was also unintentionally scrolling at the same time.

[mwcraig]

@pllim -- I think this is fixed in ipyevents 0.4.0.....I was able to pan in the ginga widget with shift+arrow key without scrolling the browser, at least.

[pllim]

Thanks, Matt. I'll follow up when I get the chance.