[Bug] Panning is broken in the multi-dataset public treemap example "How $3.7 Trillion is Spent"

[erosca]

Version

5.5.1

Link to Minimal Reproduction

https://echarts.apache.org/examples/en/editor.html?c=treemap-obama&lang=js&version=5.5.1

Steps to Reproduce

1. Open public example: https://echarts.apache.org/examples/en/editor.html?c=treemap-obama&lang=js&version=5.5.1
2. Hold left mouse click, make sure that panning works on the dataset opened by default (2012Budget)
3. Switch to 2011Budget by pressing the button in the Legend. Panning by left-mouse-click-hold still works.
4. Switch back to 2012Budget. Panning no longer works. Position of the chart is fixed.

Current Behavior

See "Steps to Reproduce"

Expected Behavior

Panning by mouse click should work regardless how many times you switch between legend datasets/tabs.

Environment

- OS: Ubuntu 22.04
- Browser: Firefox 130.0.1, Chrome 128.0.6613.137
- Framework: https://echarts.apache.org/

Any additional comments?

No response

[helgasoft]

confirmed bug in treemap. It seems legend switch resets roam to false. Series types tree and graph are not affected. Demo

[erosca]

@helgasoft Do you have any feeling how serious the issue is (looks like it's deep in the core implementation) and do you know if there is anyone likely to provide some guidance on the way to fixing it?

[helgasoft]

My feeling is that this bug is low priority and heavy workload, and wont be fixed anytime soon. Would love to be wrong though...

[erosca]

Thanks @helgasoft . Sounds like a detour to d3 is unavoidable in this case, since switching between tabs (w/o losing panning/zooming) is a core feature in my personal application/use-case.

[helgasoft]

d3 is a big bag to carry. CSS is simpler, just some way of keeping charts separate and avoid legend - Demo.

[erosca]

d3 is a big bag to carry. CSS is simpler, just some way of keeping charts separate and avoid legend - Demo.

Cool. Wonderful insight and advice 👍. Appreciated 🙏.

[helgasoft]

actually, legend can be replaced with graphic buttons (or toolbar custom buttons) - Demo

[erosca]

actually, legend can be replaced with graphic buttons (or toolbar custom buttons) - Demo

Great tip for those who will be running into the same issue and will hopefully find this page.