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# This file is part of ranger, the console file manager.
# License: GNU GPL version 3, see the file "AUTHORS" for details.
from __future__ import (absolute_import, division, print_function)
import curses
class MouseEvent(object):
PRESSED = [
0,
curses.BUTTON1_PRESSED,
curses.BUTTON2_PRESSED,
curses.BUTTON3_PRESSED,
curses.BUTTON4_PRESSED,
]
CTRL_SCROLLWHEEL_MULTIPLIER = 5
def __init__(self, getmouse):
"""Creates a MouseEvent object from the result of win.getmouse()"""
_, self.x, self.y, _, self.bstate = getmouse
# x-values above ~220 suddenly became negative, apparently
# it's sufficient to add 0xFF to fix that error.
if self.x < 0:
self.x += 0xFF
if self.y < 0:
self.y += 0xFF
def pressed(self, n):
"""Returns whether the mouse key n is pressed"""
try:
return (self.bstate & MouseEvent.PRESSED[n]) != 0
except IndexError:
return False
def mouse_wheel_direction(self):
"""Returns the direction of the scroll action, 0 if there was none"""
# If the bstate > ALL_MOUSE_EVENTS, it's an invalid mouse button.
# I interpret invalid buttons as "scroll down" because all tested
# systems have a broken curses implementation and this is a workaround.
# Recently it seems to have been fixed, as 2**21 was introduced as
# the code for the "scroll down" button.
if self.bstate & curses.BUTTON4_PRESSED:
return -self.CTRL_SCROLLWHEEL_MULTIPLIER if self.ctrl() else -1
elif self.bstate & curses.BUTTON2_PRESSED \
or self.bstate & 2**21 \
or self.bstate > curses.ALL_MOUSE_EVENTS:
return self.CTRL_SCROLLWHEEL_MULTIPLIER if self.ctrl() else 1
return 0
def ctrl(self):
return self.bstate & curses.BUTTON_CTRL
def alt(self):
return self.bstate & curses.BUTTON_ALT
def shift(self):
return self.bstate & curses.BUTTON_SHIFT
def key_invalid(self):
return self.bstate > curses.ALL_MOUSE_EVENTS
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