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This tutorial shows how to make a script that detects if the mouse wheel is scrolling in Scratch 1.4, 2.0 and 3.0.
Script
The When () Key Pressed block fires either when the mouse wheel scrolls up or down, while the Key () Pressed? block returns true only if the arrow up or arrow down keys are pressed.
Add these scripts to the project:
when [up arrow v] key pressed if <not <key [up arrow v] pressed?>> then set [sliding direction v] to [up] end when [down arrow v] key pressed if <not <key [down arrow v] pressed?>> then set [sliding direction v] to [down] end
The script is now complete.
Example Uses
- Making a webpage in an OS
- Creating a long list of things
