Make winmouse generate double click events

mouse/__init__.py

@@ -40,6 +40,9 @@
 - To avoid depending on X the Linux parts reads raw device files (`/dev/input/input*`) but this requries root.
 - Other applications, such as some games, may register hooks that swallow all key events. In this case `mouse` will be unable to report events.
 """
+# TODO
+# - infinite wait
+# - mouse.on_move
 import time as _time
 
 import platform as _platform

mouse/_winmouse.py

@@ -46,6 +46,8 @@ class MSLLHOOKSTRUCT(Structure):
 DispatchMessage = user32.DispatchMessageA
 DispatchMessage.argtypes = [LPMSG]
 
+GetDoubleClickTime = user32.GetDoubleClickTime
+
 # Beware, as of 2016-01-30 the official docs have a very incomplete list.
 # This one was compiled from experience and may be incomplete.
 WM_MOUSEMOVE = 0x200
@@ -128,8 +130,12 @@ class MSLLHOOKSTRUCT(Structure):
 
 init = lambda: None
 
+previous_button_event = None # defined in global scope
 def listen(queue):
+
     def low_level_mouse_handler(nCode, wParam, lParam):
+        global previous_button_event
+
         struct = lParam.contents
         # Can't use struct.time because it's usually zero.
         t = time.time()
@@ -144,6 +150,12 @@ def low_level_mouse_handler(nCode, wParam, lParam):
                 button = {0x10000: X, 0x20000: X2}[struct.data]
             event = ButtonEvent(type, button, t)
 
+            if (event.event_type == DOWN) and previous_button_event is not None:
+                if event.time - previous_button_event.time <= GetDoubleClickTime() / 1000.0:
+                    event = ButtonEvent(DOUBLE, event.button, event.time)
+
+            previous_button_event = event
+
         queue.put(event)
         return CallNextHookEx(NULL, nCode, wParam, lParam)