How to update chart in Lets-Plot for Kotlin in realtime - kotlin

I'm trying to modify the simple example in lets-plot-mini-apps github repo which using Lets-Plot Kotlin API in JVM app and renders plot to JavaFX Scene in way to periodically update data on a chart.
This example rebuilds a plot panel each time after data is changed and the chart flickered.
How to update chart with new data and avoid such flickers?

Following #alshan's clue about CardLayout the issue was resolved by naive trick.
Reserved CardLayout with 2 cards.
On first data update a first card is shown and new chart is pushed to the second card. On next data update the second card is shown and new chart is pushed to the first card. And so on.

Related

How to create a list which sorts its self like games with the animation

I am creating a game in flutter in which I want to create my leader board page in which I want to achieve the list like Reorderable widget but in that we drag the tile manually but I need to get it automate ,it should elevate and lower another tiles same animation like Reorderable list but it should be automated
I hope I will find some solution with large community
You can take a look at the AnimatedList in Flutter: https://api.flutter.dev/flutter/widgets/AnimatedList-class.html
When a new value is inserted (or removed), it is automatically animated (and you can of course customize this animation to suit your needs).
I'm not sure how you would handle moving an item from one place to the next in the list, though.
Update
I found this other SO thread which mentions the great_list_view package, in which you can just update your underlying list (with the new score, or sort it again) and it will automatically animate it for you. That sounds like a good option, and the package has recently been updated and has a decent amount of likes on pub.
https://pub.dev/packages/great_list_view

Hicharts graph zoom on react native

I used Highcharts on my project in mobile react native and found after trying to pinch-to-zoom on graph x-axis and y-axis are not refreshing to shows smaller x-coordinate numbers.
However when I used to work in Expo, it was properly worked and showing correct number during pinch-to-zoom.
Please advise if you ran into same issue and how you fixed it? I am guessing there should be an event needs to be trigger to refresh charts.
Tried to use Highcharts zoon feature on react native code for my graph, expecting to see smaller numbers of X and Y axis on graph after pinch-to -zoom
I have found, that you have already asked your question on Freshdesk, our support channel. In the future, please do not duplicate topics across our support channels, as we work as a single team of developers.
The React-Native package is deprecated, so that means, that we dropped support for that package, and it now is in hands of the community. If you need any support with this package, you can create an Issue in GitHub and might find some help there. Alternatively, you can try to search for some new package, which is not official. On the other hand, you can try to use methods, like chart.redraw (https://api.highcharts.com/class-reference/Highcharts.Chart#redraw) or chart.reflow (https://api.highcharts.com/class-reference/Highcharts.Chart#reflow) - they are responsible for redrawing/reflowing the chart, which will refresh the chart.

Custom Sisense Bar Chart using Blox Progress Bar not working

I want a Progress Bar that will display my current sales in comparison to the target. I found a similar tutorial and followed it exactly
This is the tutorial I followed :
https://profusion.com/insights/custom-bar-charts-in-sisense-blox-with-diego-cordero/
I have watched the youtube video for the same and used the exact code snippet from this blog. I am unable to get the progress bar configured correctly after trying several times. The purple tooltip is pointing before the progress bar even starts and seems static. Below is a screenshot for reference.
Please let me know what I am doing wrong and how to correct it.
I faced the same issue.
There is some inconsistency in formatting the percentage value.
Here's the workaround that fixed it for me:
Change {panel:percentage} reference to {panel:percentage}% in the script and in the "percentage" field in the panel, multiply the value by 100 (so that instead of 0.21, You will have 21, for example)
Then it should display the values correctly :)

How to load geo-localised informations based on map configuration and interaction

I'm currently creating a new website based on geo-localised information to display on a map. I've never done this kind of development before, and my researches don't lead me to a decent result.
What I want to do is load a few POI on the map, say 15 by 15 until all POI are loaded on the map (This is to show the user that data is loading progressively).
I know how to load said POI 15 by 15 based on their update date in a scrollable list (Using limit and offset, but this implies that we have the same reference as a starting point), and now I want the same kind of behaviour, but based on their location instead of the timestamp.
What I'd like to do is trigger the update based on the center of the map when it moves, so that it starts loading POI in the displayed area, but without reloading what was already loaded.
I can't figure out how to do that.
Say the user moves the map to the side, but keeps some POI on the map, it should reload from the center to the edge of the map without re-adding the POI.
Also, when the user zooms out, it should load around the already present POI, as the center was already loaded on previous zoom.
The only think I was able to find and understand is how to sort POI based on a distance, with the Haversine formula from here:
http://www.plumislandmedia.net/mysql/haversine-mysql-nearest-loc/
But it doesn't cover the part where you interact with the map and need to load new data to add it to what's already there.
I'm using Leaflet to show information on the map and listen to events.
Any guidance welcome.

Plotting real-time/dynamic data with D3 js

I am completely new to D3 js, but I have exposure to Highcharts. I was able to plot real time/dynamic data using HighCharts and also see the old data as there was a scrollbar feature to scroll left/right on the x-axis. The chart in question was a time-series chart with dynamic values displayed as a bar/line graph.
Is there a way to plot a dynamic chart in D3 which updates every second or so. Also I would like to see old data using panning feature in D3 js as it doesnt support scrollbar.
If you are aware of other open source and non-commercial charts which meet my requirement,kindly let me know.
You can try and use C3,js - the pubnub folks have written an extension for (EON) it that readily handles dynamic data; see an overview at https://www.pubnub.com/blog/2015-02-26-building-realtime-live-updating-animated-graphs-c3-js/ and the code at https://github.com/pubnub/eon-chart