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import traceback
import win32api
import win32con
import win32ui
from . import IDLEenvironment, keycodes
HANDLER_ARGS_GUESS = 0
HANDLER_ARGS_NATIVE = 1
HANDLER_ARGS_IDLE = 2
HANDLER_ARGS_EXTENSION = 3
next_id = 5000
event_to_commands = {} # dict of integer IDs to event names.
command_to_events = {} # dict of event names to int IDs
def assign_command_id(event, id=0):
global next_id
if id == 0:
id = event_to_commands.get(event, 0)
if id == 0:
id = next_id
next_id = next_id + 1
# Only map the ones we allocated - specified ones are assumed to have a handler
command_to_events[id] = event
event_to_commands[event] = id
return id
class SendCommandHandler:
def __init__(self, cmd):
self.cmd = cmd
def __call__(self, *args):
win32ui.GetMainFrame().SendMessage(win32con.WM_COMMAND, self.cmd)
class Binding:
def __init__(self, handler, handler_args_type):
self.handler = handler
self.handler_args_type = handler_args_type
class BindingsManager:
def __init__(self, parent_view):
self.parent_view = parent_view
self.bindings = {} # dict of Binding instances.
self.keymap = {}
def prepare_configure(self):
self.keymap = {}
def complete_configure(self):
for id in command_to_events.keys():
self.parent_view.HookCommand(self._OnCommand, id)
def close(self):
self.parent_view = self.bindings = self.keymap = None
def report_error(self, problem):
try:
win32ui.SetStatusText(problem, 1)
except win32ui.error:
# No status bar!
print(problem)
def update_keymap(self, keymap):
self.keymap.update(keymap)
def bind(self, event, handler, handler_args_type=HANDLER_ARGS_GUESS, cid=0):
if handler is None:
handler = SendCommandHandler(cid)
self.bindings[event] = self._new_binding(handler, handler_args_type)
self.bind_command(event, cid)
def bind_command(self, event, id=0):
"Binds an event to a Windows control/command ID"
id = assign_command_id(event, id)
return id
def get_command_id(self, event):
id = event_to_commands.get(event)
if id is None:
# See if we even have an event of that name!?
if event not in self.bindings:
return None
id = self.bind_command(event)
return id
def _OnCommand(self, id, code):
event = command_to_events.get(id)
if event is None:
self.report_error("No event associated with event ID %d" % id)
return 1
return self.fire(event)
def _new_binding(self, event, handler_args_type):
return Binding(event, handler_args_type)
def _get_IDLE_handler(self, ext, handler):
try:
instance = self.parent_view.idle.IDLEExtension(ext)
name = handler.replace("-", "_") + "_event"
return getattr(instance, name)
except (ImportError, AttributeError):
msg = "Can not find event '%s' in IDLE extension '%s'" % (handler, ext)
self.report_error(msg)
return None
def fire(self, event, event_param=None):
# Fire the specified event. Result is native Pythonwin result
# (ie, 1==pass one, 0 or None==handled)
# First look up the event directly - if there, we are set.
binding = self.bindings.get(event)
if binding is None:
# If possible, find it!
# A native method name
handler = getattr(self.parent_view, event + "Event", None)
if handler is None:
# Can't decide if I should report an error??
self.report_error("The event name '%s' can not be found." % event)
# Either way, just let the default handlers grab it.
return 1
binding = self._new_binding(handler, HANDLER_ARGS_NATIVE)
# Cache it.
self.bindings[event] = binding
handler_args_type = binding.handler_args_type
# Now actually fire it.
if handler_args_type == HANDLER_ARGS_GUESS:
# Can't be native, as natives are never added with "guess".
# Must be extension or IDLE.
if event[0] == "<":
handler_args_type = HANDLER_ARGS_IDLE
else:
handler_args_type = HANDLER_ARGS_EXTENSION
try:
if handler_args_type == HANDLER_ARGS_EXTENSION:
args = self.parent_view.idle, event_param
else:
args = (event_param,)
rc = binding.handler(*args)
if handler_args_type == HANDLER_ARGS_IDLE:
# Convert to our return code.
if rc in (None, "break"):
rc = 0
else:
rc = 1
except:
message = "Firing event '%s' failed." % event
print(message)
traceback.print_exc()
self.report_error(message)
rc = 1 # Let any default handlers have a go!
return rc
def fire_key_event(self, msg):
key = msg[2]
keyState = 0
if win32api.GetKeyState(win32con.VK_CONTROL) & 0x8000:
keyState = (
keyState | win32con.RIGHT_CTRL_PRESSED | win32con.LEFT_CTRL_PRESSED
)
if win32api.GetKeyState(win32con.VK_SHIFT) & 0x8000:
keyState = keyState | win32con.SHIFT_PRESSED
if win32api.GetKeyState(win32con.VK_MENU) & 0x8000:
keyState = keyState | win32con.LEFT_ALT_PRESSED | win32con.RIGHT_ALT_PRESSED
keyinfo = key, keyState
# Special hacks for the dead-char key on non-US keyboards.
# (XXX - which do not work :-(
event = self.keymap.get(keyinfo)
if event is None:
return 1
return self.fire(event, None)