Update pimoroni_trackball.py (#1014)

Author: regicidalplutophage

docs/en/pimoroni_trackball.md

@@ -31,12 +31,12 @@ trackball = Trackball(
     # optional: set rotation angle of the trackball breakout board, default is 1
     angle_offset=1.6, 
     handlers=[
-        # act like an encoder, input arrow keys
+        # act like an encoder, input arrow keys, enter when pressed
         KeyHandler(KC.UP, KC.RIGHT, KC.DOWN, KC.LEFT, KC.ENTER), 
-        # on layer 1 and above use the default pointing behavior
-        PointingHandler(),
-        # use ScrollDirection.NATURAL (default) or REVERSE to change the scrolling direction
-        ScrollHandler(scroll_direction=ScrollDirection.NATURAL)
+        # on layer 1 and above use the default pointing behavior, left click when pressed
+        PointingHandler(on_press=KC.MB_LMB),
+        # use ScrollDirection.NATURAL (default) or REVERSE to change the scrolling direction, left click when pressed
+        ScrollHandler(scroll_direction=ScrollDirection.NATURAL, on_press=KC.MB_LMB)
     ]
 )
 

kmk/modules/pimoroni_trackball.py

@@ -76,19 +76,23 @@ def handle(self, keyboard, trackball, x, y, switch, state):
 
 
 class PointingHandler(TrackballHandler):
+    def __init__(self, on_press=KC.MB_LMB):
+        self.on_press = on_press
+
     def handle(self, keyboard, trackball, x, y, switch, state):
         if x:
             AX.X.move(keyboard, x)
         if y:
             AX.Y.move(keyboard, y)
 
         if switch == 1:  # Button changed state
-            keyboard.pre_process_key(KC.MB_LMB, is_pressed=state)
+            keyboard.pre_process_key(self.on_press, is_pressed=state)
 
 
 class ScrollHandler(TrackballHandler):
-    def __init__(self, scroll_direction=ScrollDirection.NATURAL):
+    def __init__(self, scroll_direction=ScrollDirection.NATURAL, on_press=KC.MB_LMB):
         self.scroll_direction = scroll_direction
+        self.on_press = on_press
 
     def handle(self, keyboard, trackball, x, y, switch, state):
         if self.scroll_direction == ScrollDirection.REVERSE:
@@ -98,7 +102,7 @@ def handle(self, keyboard, trackball, x, y, switch, state):
             AX.W.move(keyboard, y)
 
         if switch == 1:  # Button changed state
-            keyboard.pre_process_key(KC.MB_LMB, is_pressed=state)
+            keyboard.pre_process_key(self.on_press, is_pressed=state)
 
 
 class KeyHandler(TrackballHandler):