keyboard controllers

[balthazarneveu]

Tasks

• [x] add special keyboard controls
• [x] ON/OFF (True/False) with a single key
• [x] str list with modulo
• [x] int sliders
• [x] Qt Backend
• [x] Qt backend updates on labels
• [x] Display help properly
• [x] Matplotlib backend
• [x] pageup , pagedown, up , down are supported

  Description

  use a special Control class to use a key (or 2 keys) to control an underlying

• a slider (up/down)
• a slider with a single key: to navigate like next , next, next, go back to the begining.
• a tickbox toggle (true/false when pressing A for instance)
• a dropdown list (to navigate next , next, next, go back to the begining)

@interactive(
    rotation = Control(ROTATIONS[0], ROTATIONS, name="rotation")
)

can become

@interactive(
    rotation = KeyboardSlider(ROTATIONS[0], ROTATIONS, name="rotation", keydown="-", keyup="+", modulo=True)
)

:gift: added the QT info box to view shortcuts information. Keyboard sliders appear here