Jump to content
JChartFX Community
  • 0

JChartFX pie chart drawing before data has been returned



The goal is to have a pie chart that is drawn when the page loads using data from my database.  I am using Angular typescript for the front end.

The relevant section of code is as follows:

pieData; //the object I intend to load the pie chart data into


ngOnInit() {
this.getPieData(); //calls the database and loads the results into pieData
this.createPieChart(); //creates the pie chart, based on the information in pieData

When that runs, the pie chart drawn uses seemingly random data, but the console readout prints out the pieData correctly, so I know getPieData is working the way it should.  When I've put some random console.log commands into getPieData and createPieChart, I've learned that createPieChart seems to be running before getPieData.

I've tried using Promises to force it to wait for the data:


ngOnInit() {
    new Promise ((resolve, reject) => {
    .then(() => {this.createPieCharts();})

but the same thing occurs.

I have tried preloading some data into pieData, and in that case it only ever displays the preloaded data.

How can I consistently force getPieData to run before createPieCharts?

Link to comment
Share on other sites

0 answers to this question

Recommended Posts

There have been no answers to this question yet

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Answer this question...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...