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Distinguish between user and layout zoom/pan

See original GitHub issue

Description of new feature

I would like to distinguish between a layout zoom/pan and a user zoom/pan.

Motivation for new feature

As a default behaviour in my application, I want to fit everything to the screen using the layout fit: true.

However, if the user wants to explore the graph closer, I want to change the layout options to fit: false, in order for the user to be in control. The reason for this is that my layout runs everytime new data is coming in to the graph and when the user is in control the graph should not fit again.

This switch should only happen on the user initiated zoom/pan, however with the current event handlers for zoom and pan, I cannot distinguish whether it was the user or the layout.

Issue Analytics

State:
Created 3 years ago
Reactions:1
Comments:9 (8 by maintainers)

Top GitHub Comments

1reaction

maxkfranzcommented, Oct 6, 2020

What about the addition of events like these?

pinchzoom
scrollzoom
dragpan

Those kinds of events kill two birds with one stone: You can tell that they’re user generated, and you can also tell exactly what kind of gesture originated a viewport change.

I think that this would just involve adding extra emit()s nearby the existing emit() calls in the renderer and updating the docs. Would you be interested in making a PR for events like these?

0reactions

charles-stuart-appdetexcommented, Dec 11, 2020

I’ll try and take a look next week. Thanks for the details.

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