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Posted to commits@echarts.apache.org by GitBox <gi...@apache.org> on 2021/11/24 07:06:38 UTC
[GitHub] [echarts] grigiada opened a new issue #16103: zoom / datazoom in touchscreen
grigiada opened a new issue #16103:
URL: https://github.com/apache/echarts/issues/16103
### Version
5.2.2
### Steps to reproduce
It is possible to reproduce the problem with any example graphic also present on your site.
### What is expected?
I cannot change the zoom area using a normal touchscreen connected to a Windows PC. The same function on phone and tablet works fine.
It is possible to reproduce the problem with any example graphic also present on your site.
### What is actually happening?
I cannot change the zoom area using a normal touchscreen connected to a Windows PC.
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[GitHub] [echarts] grigiada commented on issue #16103: zoom / datazoom in touchscreen
Posted by GitBox <gi...@apache.org>.
grigiada commented on issue #16103:
URL: https://github.com/apache/echarts/issues/16103#issuecomment-979724403
Thank you for your reply.
No particular device is needed to test the malfunction but any touch
monitor connected to a windows pc.
I seem to have solved this problem by rewriting the function that
recognizes the touch capabilities of the monitor.
In echarts.js I substitute this condition
env.touchEventsSupported = 'ontouchstart' in window && !browser.ie &&
!browser.edge;
with this one:
env.touchEventsSupported = detectTouchscreen();
where the function detectTouchscreen() is implemented as follows:
function detectTouchscreen() {
var result = false;
if (window.PointerEvent && ('maxTouchPoints' in navigator)) {
// if Pointer Events are supported, just check maxTouchPoints
if (navigator.maxTouchPoints > 0) {
result = true;
}
} else {
// no Pointer Events...
if (window.matchMedia &&
window.matchMedia("(any-pointer:coarse)").matches) {
// check for any-pointer:coarse which mostly means
touchscreen
result = true;
} else if (window.TouchEvent || ('ontouchstart' in window)) {
// last resort - check for exposed touch events API / event
handler
result = true;
}
}
return result;
}
I hope it will be useful to improve the functioning of your library.
Reading the forums I am not the only one with this problem and it would be
very useful if the next release had this function.
Have a good day.
Giada
Il giorno ven 26 nov 2021 alle ore 06:03 Yi Shen ***@***.***>
ha scritto:
> @grigiada <https://github.com/grigiada> I'm afraid we don't have the
> specifc device to do the test. Do you mind taking a deep look at it and
> report us with more detail?
>
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[GitHub] [echarts] echarts-bot[bot] commented on issue #16103: zoom / datazoom in touchscreen
Posted by GitBox <gi...@apache.org>.
echarts-bot[bot] commented on issue #16103:
URL: https://github.com/apache/echarts/issues/16103#issuecomment-977590325
Hi! We've received your issue and please be patient to get responded. 🎉
The average response time is expected to be within one day for weekdays.
In the meanwhile, please make sure that it contains **a minimum reproducible demo** and necessary **images** to illustrate. Otherwise, our committers will ask you to do so.
*A minimum reproducible demo* should contain as little data and components as possible but can still illustrate your problem. This is the best way for us to reproduce it and solve the problem faster.
You may also check out the [API](https://echarts.apache.org/api.html) and [chart option](https://echarts.apache.org/option.html) to get the answer.
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Have a nice day! 🍵
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[GitHub] [echarts] pissang commented on issue #16103: zoom / datazoom in touchscreen
Posted by GitBox <gi...@apache.org>.
pissang commented on issue #16103:
URL: https://github.com/apache/echarts/issues/16103#issuecomment-979698876
@grigiada I'm afraid we don't have the specifc device to do the test. Do you mind taking a deep look at it and report us with more detail?
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