When I zoom by chartjs-plugin-zoom library, the children of tree move on the screen, and the zooming speed is very slow in the mobile size.

[mirzaeianfar]

When I zoom by chartjs-plugin-zoom library, the children of tree move on the screen, and the zooming speed is very slow in the mobile size.
How can I avoid moving the items of tree and touch speed more in mobile size?

[mirzaeianfar]

You can test it in the address:
https://bv.emofid.com/map
@stockiNail

[stockiNail]

If understood well, we could always calculate the sizes based on chartArea (as it was before) and transform the canvas before drawing based on new coordinates of new scale size

[stockiNail]

It works. Some options are not working (like overflow) because we just resizing the canvas, always with the same size. I need to do some additional tests. Let me move the discussion in a issue

[stockiNail]

@kurkle there is a bug in the arrayNotEquals function:

chartjs-chart-treemap/src/controller.js

Line 20 in 4a0b22a

if (a1.lenght !== a2.length) {

wrong array option: a1.lenght

[stockiNail]

@mirzaeianfar I have submitted a PR #157. I'm not able to understand if this new implementation is really improving your use case because I don't have old mobile to test. If I provide the new controller JS file (in some way), are you able to test in the mobile?

[stockiNail]

@mirzaeianfar I’m not 100% sure that the slowness depends on update phase. Could you provide the whole configuration of the chart, mainly the dataset one ? I think you are using scriptable options which could affect the draw phase.

[kurkle]

@mirzaeianfar can you test with version 2.1.3 and see if it is better and if it is good enough for your use case?