calculate value according to a mathematical function

[JunxuanZhao]

I need to create a custom widget that could calculate the value according to a model( function). For example, the user enters two values for the parameter a and b, then we need to display the result of f(a,b).

Is there any sample code to recommend?

[AdrianWelsh]

Hi Junxuan,

I would suggest tagging the Web AppBuilder Custom Widgets​ place (or maybe moving your thread to that place).

Also, you could look through Robert Scheitlin, GISP​ 's Roberts Custom WAB Widgets

But, what you're asking for sounds pretty specific.

[RobertScheitlin__GISP · Accepted solution]

Junxuan,

  Here is a sample widget that just adds or multiplies to numbers from user input and displays the results in the widgets text.

[JunxuanZhao]

Hi Robert,

Thanks for your sample!

It works well in our web application. But when we copy the widget file to the samplewidgets files( follow the link:Create a custom in-panel widget—Web AppBuilder for ArcGIS (Developer Edition) | ArcGIS for Developer... ), it can not work in the demo widget. The error is as follow:

Error: dijit._WidgetsInTemplateMixin: parser returned unfilled promise (probably waiting for module auto-load), unsupported by _WidgetsInTemplateMixin.   Must pre-load all supporting widgets before instantiation.

Thanks,

Junxuan

[RobertScheitlin__GISP]

Junxuan,

  Nothing in the samplewidgets folder is included by WAB as there is a specific file .repoignore that tells WAB to ignore any file in the samplewidgets folder.