wire up mouse move handler

0001-on

@@ -12,6 +12,7 @@ on = {
   --   on.focus
   --   on.mouse_press (see love.mousepressed)
   --   on.mouse_release (see love.mousereleased)
+  --   on.mouse_move (see love.mousemoved)
   --   on.mouse_wheel_move (see love.wheelmoved)
   --   on.keychord_press (see keychord.lua in this repo)
   --   on.text_input (see love.textinput)

main.lua

@@ -191,6 +191,10 @@ function App.mousereleased(x,y, mouse_button)
   if on.mouse_release then on.mouse_release(x,y, mouse_button) end
 end
 
+function App.mousemoved(x,y, dx,dy, istouch)
+  if on.mouse_move then on.mouse_move(x,y, dx,dy, istouch) end
+end
+
 function App.wheelmoved(dx,dy)
   if Mode == 'error' then return end
   Cursor_time = 0  -- ensure cursor is visible immediately after it moves

reference.md

@@ -85,6 +85,12 @@ two categories.
   button. Provides the same arguments as `on.mouse_press()` above.
   (Based on [LÖVE](https://love2d.org/wiki/love.mousereleased).)
 
+* `on.mouse_move(x,y, dx,dy, istouch)` -- called when you move the mouse.
+  Provides in `x` and `y` the point on the screen at which the click occurred
+  and in `dx` and `dy` the amount moved since the previous call of
+  `mouse_move`.
+  (Based on [LÖVE](https://love2d.org/wiki/love.mousemoved).)
+
 * `on.mouse_wheel_move(dx,dy)` -- called when you use the scroll wheel on a
   mouse that has it. Provides in `dx` and `dy` an indication of how fast the
   wheel is being scrolled. Positive values for `dx` indicate movement to the