Zoom to month by clicking on a DateAxis label
Type
demo This demo shows how we can implement hit event on DateAxis labels to automatically zoom to the clicked period.
Custom-ordered legend items
Type
demo This demo shows how we can use events to dynamically re-arrange Legend items per our completely custom criteria.
Building drill-down maps
Type
tutorial In this tutorial we’ll look at techniques for building various map-based drill-down scenarios. Requisites The techniques described in this tutorial rely on event infrastructure. If you’re not yet familiar how events work in amCharts 4, we suggest taking a look at “Event Listeners” article first. We also assume that you have basic knowledge of MapChart […]
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 […]