ControlP5 Event Handling

[vsquared]

Event handling for cp5 buttons in py5 appears to work differently than in Java:

# Uses Imported mode for py5
from controlP5 import ControlP5

this = get_current_sketch()
print(this)

def settings():
  size(400,200)

def setup():
  global btn1
  
  window_title("Button cp5 Demo")  
  cp5 = ControlP5(this)
  btn1 = cp5.addButton("btn1").setValue(0).setPosition(100,40).setSize(100,20)

# Never called
def btn1(value):
  print("a button event from btn1: " + value);

# Never called
def controlEvent(e):
  print(e.getController().getName())

# This works
def mouse_pressed(e):
  if(btn1.isPressed()):
    print("btn1 was pressed.")

[villares]

😀

[vsquared]

Good to know cp5 controls work cross-platform so far. I didn't see any arrows in the cp5 line-up but it's not too hard to make your own image buttons.

# Uses Imported mode for py5
from controlP5 import ControlP5

def drawArrow(l):
  arrw = create_graphics(20,20)
  arrw.begin_draw()
  arrw.background(255)
  arrw.fill(0,255,0)
  arrw.triangle(l[0],l[1],l[2],l[3],l[4],l[5])
  arrw.end_draw()        
  return arrw

def settings():
  size(200,150)

def setup():
  global up
  global dwn
  
  window_title("Arrow Demo")  
  cp5 = ControlP5(get_current_sketch())
  upl = [10,2,2,18,18,18]
  upArrw = drawArrow(upl)
  up = cp5.addButton("up").setId(2).setPosition(60,20).setSize(20,20)
  up.setImage(upArrw)
  dwnl = [2,2,18,2,10,18]
  dwnArrw = drawArrow(dwnl)
  dwn = cp5.addButton("dwn").setId(1).setPosition(60,40).setSize(20,20)
  dwn.setImage(dwnArrw)
 
def mouse_pressed(e):
  if(up.isPressed()):
    print("up arrow was pressed.")  
  if(dwn.isPressed()):
    print("down arrow was pressed.")

Output:

[hx2A]

# Never called
def btn1(value):
  print("a button event from btn1: " + value);

# Never called
def controlEvent(e):
  print(e.getController().getName())

Right, @vsquared , this is the problem I'd like to fix. It would require some Java code to facilitate the callbacks from the ControlP5 library to Python. It could be done - similar callbacks are fundamental to how py5 works.

[GoToLoop]

It would require some Java code to facilitate the callbacks from the ControlP5 library to Python.

Processing's Python Mode (Jython) relied on such callback "hacks" for some common Processing's libraries:
https://github.com/jdf/processing.py/blob/4001/runtime/src/jycessing/PAppletJythonDriver.java#L197-L219
https://github.com/jdf/processing.py/blob/4001/runtime/src/jycessing/PAppletJythonDriver.java#L714-L729