ProfessorCad: Components

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Christopher J Ward
Engineer & Software
Developer

GUI Components

Additional GUI Components to enhance your Apps!

Radio Buttons

Radio Buttons are a simple and popular way to make one selection from a group

A good way to collect User Preferences for your app
Present Surveys to your App Users
Make a quick-fire quiz for your friends

Package consists of Predefined Graphics and Sample Code

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Components for App Inventor: Radio Buttons

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Ratings Bars

Ratings Bars are a quick, interactive way for the App User to express opinion

Collect User Ratings for your app experience
Present Surveys to your App Users to Rate items from music to muffins
A novel way for App Users to input values
Display "lives remaining" and/or "collectables available" in your game

Package consists of Predefined Graphics and Sample Code

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Components for App Inventor: Ratings Bars

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Slide Switches

Slide Switches are popular because you can see their on/off state at a glance

Provide your App Users with on/off yes/no Preferences input
Give your GUI a professional appearance
A novel way for App Users to answer simple questions
A slick alternative to Check Boxes for Check Lists

Package consists of Predefined Graphics and Sample Code

Video

Components for App Inventor: Slide Switches

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Spinners

Spinners are an easy way to input precise increments

Provide your App Users with an input method that prevents typing errors
Values can be integer or decimal

Package consists of Predefined Graphics and Sample Code

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Components for App Inventor: Spinner

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Sliders

Sliders are an easy way to input/output varying values

App Inventor has a Slider Component, but it does not properly support integers
Scale can be an integer or decimal range of any increment
Detect when the Thumb is released - allowing auto-reset if required

Package consists of Predefined Graphics and Sample Code

Video

Components for App Inventor: Slider

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