pad.py

#!/usr/bin/python3
import tkinter,tkinter.ttk,subprocess

class Group:
  def __init__(self,keys):
    self.keys=keys

root=tkinter.Tk()
frame=tkinter.ttk.Frame(root,padding="3 3 12 12")
rows=[[Group('qwer')],
      [Group('asdf')],
      [Group('zxcv')],
      [Group('7'),Group('8'),Group('9')],
      [Group('4'),Group('5'),Group('6')],
      [Group('1'),Group('2'),Group('3')]]
origin=[78,186]
active=set()
window=False

def run(command):
  return subprocess.run(command,shell=True,capture_output=True,encoding='utf8')
  
def find(key):
  i=0
  for groups in rows:
    for g in groups:
      for k in g.keys:
        if k==key:
          return origin[1]+32*i
        i+=1
  raise Exception('No key?')
        
def group(key):
  for groups in rows:
    for g in groups:
      if key in g.keys:
        return g
  raise Exception('No group?')

def focus():
  global window
  if not window:
    window=run('xdotool search --name "LMMS pad"').stdout.strip()
  run(f'xdotool windowfocus {window}')

def activate(key):
  for k in group(key).keys:
    if k==key and k not in active:
      active.add(k)
    elif k in active:
      active.remove(k)
    else:
      continue
    x=origin[0]
    y=find(k)
    run(f'xdotool mousemove {x} {y} click 1')
  focus()
  
def mute():
  for a in list(active):
    activate(a)
    
def reset():
  global active
  active=set()

def setup():
  root.title("LMMS pad")
  root.columnconfigure(0,weight=1)
  root.rowconfigure(0,weight=1)
  frame.grid(column=0,row=0)
  for i,groups in enumerate(rows):
    column=0
    for group in groups:
      for k in group.keys:
        do=lambda k=k:activate(k)
        tkinter.ttk.Button(frame,text=k,command=do).grid(column=column,row=i)
        root.bind(k,lambda x,k=k:activate(k))
        if k.isnumeric():
          root.bind(f'<KP_{k}>',lambda x,k=k:activate(k))
        column+=1
  tkinter.ttk.Button(frame,text='Mute',command=mute).grid(column=0,row=6)
  tkinter.ttk.Button(frame,text='Reset',command=reset).grid(column=1,row=6)
  root.bind('m',lambda x:mute())
  root.bind('<Escape>',lambda x:root.destroy())
  root.mainloop()

setup()