Touchscreen audio controller for presentation sound
The pause Function
The pause function is called when the pause button is touched on the touchscreen. Because I don't want to immediately start the next track, I disable the end event by calling self.channel.set_endevent with no arguments. Then, I can fadeout the current track (line 136) and set the class state to PAUSED (line 137).
The checkStopped Function
checkStopped first checks whether this instance is playing (line 140). If so, then it checks whether the channel it's been assigned is currently playing. If get_busy is False, then no playback is occuring (line 141). In that case, it's time to start the next track.
Line 142 clears the end event on self.channel, then increments trackIndex (line 143). Line 144 checks to see if trackIndex has run over the top, and if so, resets it to 0. Lines 145-151 are the same as the play function above to start playback.
Buy this article as PDF
Pages: 2
(incl. VAT)
Buy Raspberry Pi Geek
US / Canada
UK / Australia
Related content
-
Pygame modules for interactive programs
Pygame modules are particularly suited to programming highly interactive software. We look at the modules dedicated to events, sound, and input by keyboard, mouse, and game controller.
-
Graphical displays with Python and Pygame
As its name implies, Pygame is a set of Python modules designed to write games. However, many Pygame modules are useful for any number of projects. We introduce you to a few Pygame modules that you can use to create custom graphical displays for your project.
-
Build a complete game with Python and PyGame
We show how to use PyGame to implement a fully playable version of the classic "robots" game.
-
Using a temperature and humidity sensor to monitor a terrarium
An Arduino sensor, a Raspberry Pi, and a Python program help a budding naturalist keep tabs on the conditions in his snake's terrarium.
-
A Python interface to a large-format pen plotter
Getting a large-format plotter operational presented a personal challenge. A Raspberry Pi with a USB-to-serial dongle was the easiest way to start plotting on my home network.
