Pseudo Radio Buttons (from CheckBoxes)

[Scott Ferguson]

Create groups of CheckBoxes to be used as radio buttons.

When one of the checkboxes in a group is checked, the others are cleared.

A Changed event is used for each checkbox and each should contain the TickCheckBox procedure.

The TickCheckbox procedure tests if the checkbox was checked.

if so, it clears all checkboxes in the group then sets the selected checkbox.

Two procedures with result are included:

CheckBoxesSelection returns either a group's ticked checkbox text or empty text if none was ticked

CheckBoxesSelectionIndex returns either a group's ticked checkbox index or 0 if none was ticked

Any number of checkboxes in a group is supported so this is a general solution.

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[Sjaak Bosman]

Scott,

By using .Checked the user is able to uncheck a checked checkbox, leaving the radio button group with no selection at all. You can find a detailed description on how to avoid that on http://appinventor.mit.edu/explore/blogs/karen/2016/07-0.html. At a glance:

Grtz,

Sjaak

http://appinventor.mit.edu/explore/master-trainers.html#bosman

Op woensdag 10 februari 2016 14:37:10 UTC+1 schreef Scott Ferguson:

[Scott Ferguson]

Thanks for pointing this out, and nice tutorial!

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[Sjaak Bosman]

Thanks Scott :-)