#Goland zoom in how to#
#Goland zoom in update#
#Goland zoom in code#

#Goland zoom in code#

The code is similar to the DrawTimeLine(), but there is something different.ДЄt the end we are creating brush.

#Goland zoom in how to#

How to create D3js v6 timeline Updating DrawTimeLinePanel() function This work is based on previous article, please check it for detailed information. DrawTimeline() creates the timeline and DrawTimeLinePanel() draws our panel for zooming funcitonality. Again, nothing special, this code just sends a JSON request to /get_timeline_data and prints whatever it getsВ back.Д«y inserting d3.json fetch method (which builts on standard javascript fetch method) we started using D3В library. Switch to homepage.js and insert code below. Switch to homepage.css and insert code below. There is nothing special in here, just loading those two javascript files, creating heading and two elements, that will hold our timeline and our zoomВ panel.

#Goland zoom in update#

Switch to homepage.html and update it with code below. If all is running, we are ready to goВ further. Run the main.go and donвЂ™t forget to set it to package mode. Synchronise all Go modules either using built-in Goland functionality or using command go get -u all. The function getTimelineData() will generate some pseudorandom data for last 24 hours and send it back to theВ browser.Д«y Data I mean two arrays, containing just a date in UNIX format and value (either 1 or 0, meaning ON orВ OFF). This code is the basis, on which we will build right on. This file contains nothing more, than a function for serving the homepage. This file is responsible for logging to console only, not too much codeВ here. if you want to know an explanation on each part, please use link in the front of theВ article. In case you want to know, why we are using Go in here, please check thisВ article.Д§ Reasons You Should Try Go Updating theВ backend Updating main.goД«elow is a complete go code for creating and running a web server service. Of course, you can use any backend language you want.

Create three new files in main project directory: main.go, homepage.go, timeline.go andВ log.go.

Create new file homepage.css in css directory.

Create new file homepage.html in html directory.

Create new file homepage.js in this js directory.

Download latest D3 library and save it into this js directory.

Create three new directories: css, html and js.

This tutorial is bases on work done in those two tutorials, but can be treated separately.Д¬reate new project in Goland, name it medium_d3_timeline Here is a more descriptive tutorial on creating web server inВ Go. As always, youвЂ™ll find link to Github repository at the end of theВ article. You can skip Preparing the project, if you only need the D3js information. We will use Go as a web server to simulate some pseudo-real world backend data sending.

We will use latest version of D3js, which is version 6.5.0, as of February 13, 2021.

Set up interactions, in this case, zoomВ panel.

In this article, we will use strategy I learnt in Amelia WattenbergerвЂ™s book and we will build on thoseВ steps: Please note, that this work stands on shoulders of otherВ people. I was not able to find out working example of version 6 timeline chart, so I decided to makeВ one. It is not easy, nowadays, to find an up-to-date version 6 examples of D3jsВ charts. Official examples gallery doesnвЂ™t use Javascript, instead it uses special Observable Notebook language. In the year 2020, it was upgraded to versionВ 6.ДЄnd this brings us a little problem. D3js is a Javascript library for doing graphical magic on data.