Zoom

[HernandoSergio]

Is there a way to add zooming?
I could adjust the domain axis viewport, but as there is no controller I cannot know the current view to be able to zoom around the currently viewd center...

[indratrisnar]

there is no way to add zooming. at least for now (but I can't guarantee this feature will be there in the future).

maybe you can adjust by modifying domain viewport and measure viewport, you can also combine with allowSliding

[indratrisnar]

for example if you want to zoom in vertically you can set lower measure viewport.
if you want to zoom in horizontally you can set shorter domain viewport.

[HernandoSergio]

Thanks for the answer, though it is a pity.

I had already thought about that solution, but as I do not know which is the current domain viewport (if the user has slided the chart), I cannot zoom to the area that is currently being displayed.

[indratrisnar]

for that, you can refer to this: Withour Measure ViewPort

try to pay attention to the change in axis size:

[HernandoSergio]

Thanks for the info. I had already played with all that, and I have a configuration for the slide just how I need it.
But, as I said, the problem is knowing the currently viewed domain interval to be able to set the new domain viewport centered in the same area.

[indratrisnar]

you can try these property to listen changes:

onChangedListener
onUpdatedListener

[HernandoSergio]

But as far as I understand (and see), those events only provides the Data point the user has clicked on, and nothing when the user slides the chart....
Besides, I am now seing another problem: I was using those events to show the user the values of the point clicked (as a marker, that would be a reallly nice feature to include), but as I need to include a setState in it, the chart reverts to the domain viewport of the build, so the current slide position is lost.....

[indratrisnar]

Yes, because the widget doesn't have ScrollController, not able to save slide position.

If you need more flexibility and full customization, you can refer to this.

Maybe alternative solution from me:

• create variable to handle state of (domainViewport & mesaureViewport).
• you can use setState or using State Management.
• create 2 button on left and right (like on the calendar) to navigate. This navigation mean is to change state of (domainViewport & mesaureViewport).

[HernandoSergio]

Yes, including something like that would be great.

In the meantime I will take a look at using the "community_charts" directly.

Thanks

[indratrisnar]

anytime, i will update this issue if in the future i found another solution.