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Sightlines
Sightlines is a framework for using a Novation Launchpad as an information display and control panel for general computing tasks.
Sightlines is made possible by the launchpad.py
library, written by @FMMT666.
Quick Start
- Install Sightlines:
pip install git+ssh://git@github.com/jarpy/sightlines
- Run a sample app:
sightlines-rainbow
Writing an App (WIP)
Cell
Grid
Individual cells are not much fun. The Grid
class collect all the cells in the main 8x8 grid of the launchpad together. You can then look up cells in various ways.
Linear Addressing
All the grid cells are available for lookup by linear index. They are numbered 0 to 63, starting top-left and proceeding left-to right, then top to bottom (revealing the cultural bias of the author).
grid = Grid()
top_left_cell = grid[0]
bottom_right_cell = grid[63]
Cartesian Addressing
You can use x/y coordinates to get a cell in a more spatial way.
grid = Grid()
top_left_cell = grid[0, 0]
bottom_right_cell = grid[7, 7]
Slicing
Finally, you can use Python's slicing syntax.
grid = Grid()
second_row = grid[8:15]
CellRunner
As a rule, information displays periodically gather some data and then update the display output with what they learned. Sightlines encapsulates this behaviour in the CellRunner
class. A CellRunner
takes a collection of cells, and a function. It then periodically calls the function and does whatever is in it, generally setting the color of the cells.
def be_green(cells):
for cell in cells:
cell.set_rgb(0, 127, 0)
CellRunner()
Cell Functions
When you press a cell on the Launchpad, it can do... stuff.
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