topic Re: calculate value according to a mathematical function in ArcGIS Web AppBuilder Questions

calculate value according to a mathematical function

JunxuanZhao — Sat, 14 May 2016 13:43:31 GMT

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?

Re: calculate value according to a mathematical function

AdrianWelsh — Sun, 15 May 2016 02:33:35 GMT

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.

Re: calculate value according to a mathematical function

RobertScheitlin__GISP — Sun, 15 May 2016 19:18:11 GMT

Junxuan,

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

Re: calculate value according to a mathematical function

JunxuanZhao — Mon, 16 May 2016 00:23:29 GMT

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 Developers ), 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

Re: calculate value according to a mathematical function

RobertScheitlin__GISP — Mon, 16 May 2016 00:35:58 GMT

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.