Overview

Triggers either an event or sets a boolean when the widget's DIV is scrolled into view. This can be used to detect when a user has scrolled to the end of a terms and conditions form.

Documentation

Description

Triggers an event or sets a boolean when the widget's DIV is scrolled into view. This can be used to detect when a user has scrolled to the end of the terms and conditions form. View source code on Github.

Typical usage scenario

If you have a very long text, like terms and conditions, and you need a way of knowing when the user has reached the end of the form before allowing them to continue with a Wizard.

Could be used to prevent data on a page from loading until it has been scrolled into view. Do this by having the data view’s visibility disabled by a boolean and having the widget set the boolean blocking the date view to true when scrolled into view.

Features and limitations

Features:

• Trigger a Mendix event when the widget is scrolled into view
• Sets a Mendix boolean to true when the widget is scrolled into view

Limitations:

• None known

Dependencies

• None

Installation

1. Put the widget in your project’s Widget folder and go to App → Synchronize App Directory.
2. Place the widget on your page below the text you want to detect the end and inside the same container as that text (i.e.

    

   ).
3. If you want to set a boolean, change “Set a Boolean?” to Yes and select the “Boolean to Change”.
   1. Note: This requires the widget to be inside a data view and the boolean selection will be an attribute on the object the data view returns. 
4. If you want to call a Mendix action, set “Scrolled Into View Action”. Make sure “Set a Boolean?” is set to No.
5. After you’ve completed your testing, be sure the set “Debug Move?” to No.

Configuration

• Debug Mode
  • a blue and red message will display where the widget is rendered
  • the browser console will receive logs when actions are performed
  • use this to see the exact point the widget is activated
• Set a Boolean?
  • If true, the widget will update the boolean attribute defined in “Boolean to Change”
  • If false, the widget will execute the action defined in “Scrolled Into View Action”
  • Note: The current user needs read/ write permission for setting the boolean or permission to execute the action 
• Boolean to Change 
  • The attribute the widget will update when the widget is scrolled into view
  • This attribute is only changed if “Set a Boolean?” is true
• Scrolled Into View Action
  • The page, microflow, nanoflow etc. that widget will trigger when the widget is scrolled into view

Bugs

None Yet – please submit any to https://github.com/bsgriggs/mendix-scroll-into-view-detector/issues