Activate/deactivate a pie slice on legend click instead of toggling

Type tutorial

Normally, when you click an item in PieChart’s legend, relative slice is hidden or revealed. This quick tutorial will show you how to make the slice activate/deactivate (pull out/in) instead. Setting up To make this work we’ll have to do two things: Disable regular toggling of the items. Add custom event that toggles isActive state […]

Auto-hide value axes

Type tutorial

Normally, all initialized Value Axes are shown, even if they do not have any visible Series attached to them. This also means that when Series is toggled off, the related Value Axis will remain. This tutorial will show how we can toggle axes off together with Series. The problem Let’s take a simple multi-series multi-axes […]

Map polygon hover via API

Type tutorial

In most map setups, a polygon (country) will change color and show a tooltip with its name when hovered. This tutorial will show how you can “simulate” hover via API, without user actually interacting with the map. Base map Here’s what we are going to start with. The map below has already set up states […]

Handling axis zoom events via API

Type tutorial

Any axis in amCharts 4 can be zoomed. And sometimes we need to know when that happens, as well as the range of the new zoom. This tutorial will walk through all the necessary information to make that happen. This works a bit differently on different axis types, so we’ll explore them separately. Catching zoom […]

Pre-zooming Map to a list of countries

Type tutorial

In this tutorial we explained how you can pre-zoom your map to a specific country. This tutorial builds on it to produce an example that pre-zooms the map to several countries. One-country solution In the previous tutorial we have used Map series’ method getPolygonById(id) to extract a polygon object of a specific country by its […]

Highlighting column series on legend click

Type tutorial

During the course of this tutorial we’ll modify the functionality of the legend from toggling series on and off, to rather highlighting it. Base chart Here’s our base chart we’re going to be working with: It has a legend, which acts normally: toggles relative series on and off on click. We’ve also set up our […]

Automatic labels over map polygons

Type tutorial

During the course of this article we’re going to learn how to automatically place labels over map polygons, as well as make them positioned just the right way. Base map As a polygon of our development, let’s use a map of the United States in an Albers USA projection. Series for polygons Setting up Polygon […]

Toggling multiple series with a single legend item

Type tutorial

This tutorial will show how you can toggle several Series at once, with a single Legend item. Base chart Let’s start with a basic chart with three Line series. Each Series has its own entry in the Legend. Click any of those will toggle its corresponding Series on and off. Suppose, we need to have […]

Hide map images until zoomed in

Type tutorial

Showing a lot of markers on the map may render it cluttered beyond usability. This tutorial will show how you can easily specify custom zoom levels for each individual image to be shown at. The problem Say we have a map with a lot of images in a MapImageSeries: While not exactly “unusable”, still a […]

Custom static multi-value tooltip

Type tutorial

Its easy to consolidate a lot of data into a single tooltip that is displayed over Series using Cursor. We’ve covered it in this tutorial. But what if we don’t want a huge square following our cursor, and would rather display that info in a fixed place in the corner? Read on, as we show […]