TouchDevelop: Programming on the Go, Third Edition

Chapter 3

The Wall – using the screen

A TouchDevelop script usually needs to interact with the user. While input via a microphone and output via speakers built into, or connected to, the device are certainly possibilities, a touchscreen or a screen plus a mouse is almost always used for input and output. In TouchDevelop, the screen is known as the wall. The API provides many ways in which a script can access the wall.

3.1 Output – the writing on the wall

3.2 Input of values from the touchscreen

3.3 Updating the wall’s content

3.4 Events on the touchscreen

3.5 Pushing and popping pages

3.6 Titles and subtitles

3.7 Wall buttons

3.8 On-demand creation of output

3.1    Output – the writing on the wall

3.1.1    Output of simple ...