Question

问题是：我需要抓住鼠标滚轮的滚动事件（向上或向下），并将其从100个滚动计数减少到1个（没有那么精确）。所有这些都在树莓派3上的python 2.7中进行。然后继续滚动其他事件。我的想法是使用write()函数重新发送所有事件。我为此使用evdev。

到目前为止，滚动检测正在运行。我找不到只停止滚动事件并继续其他鼠标事件的方法。通过dev.grab（），所有事件都将停止，似乎阻止了dev.write（）函数。

任何建议如何实现这一目标？

到目前为止的代码：

import evdev
from evdev import UInput, AbsInfo, InputDevice, categorize, ecodes
from pprint import pprint
import sys
import time

#get the mouse and use it in dev
devices = [evdev.InputDevice(path) for path in evdev.list_devices()]
foundMouse = None
for device in devices:
    if "mouse" in device.name.lower():
        foundMouse = device
        print("Mouse found, using: ", device.path, device.name, device.phys)
        break

if foundMouse is None:
    print("No mouse found, exiting...")
    sys.exit()

dev = InputDevice(device.path)    
#pprint(dev.capabilities(verbose=True, absinfo=True))

#i guess these are not working because of the dev.grab()
#simulatedUserInput = UInput(dev.capabilities(), name='simulated-device', version=0x3)
simulatedUserInput = UInput()

#i guess this will block the dev.write(), bud it's not clear from the documentation
dev.grab()

scrollUps = 0
scrollDowns = 0
startingTime = time.time()
amountOfScrollsToReactOn = 10 #will be 100 or so, bud for testing just 10

for event in dev.read_loop():
    #catch the scroll wheel
    if event.type == evdev.ecodes.EV_REL and event.code == evdev.ecodes.REL_WHEEL:
    #if event.type == 0x02 and event.code == 0x08:
        currentTime = time.time()
        #print((currentTime - startingTime))
        if event.value > 0:
            scrollUps+=1
            scrollDowns = 0
        elif event.value < 0:
            scrollDowns+=1
            scrollUps = 0
        if (currentTime - startingTime) > 10:
            startingTime = time.time()
            scrollUps = 0
            scrollDowns = 0
        #if scrolled x amount of times in 10 seconds
        elif (currentTime - startingTime) < 10 and (scrollUps > amountOfScrollsToReactOn or scrollDowns > amountOfScrollsToReactOn):
            if scrollUps > amountOfScrollsToReactOn:
                print("UP")
            elif scrollDowns > amountOfScrollsToReactOn:
                print("DOWN")
            startingTime = time.time()
            scrollDowns = 0
            scrollUps = 0
        #pprint(str(event.type) + " " + str(event.code) + " " + str(event.value))
    #print(categorize(event))
    else:
        #pprint("sending: " + str(event.type) + " " + str(event.code) + " " + str(event.value))

        #both below are not doing anything
        #here the point is to reroute the other events then scrolling, bud any other way to archive this would be the solution
        #dev.write(e.EV_KEY, e.KEY_A, 0)
        simulatedUserInput.write(event.type, event.code, event.value)
        simulatedUserInput.syn()

减少鼠标输入evdev python

0 个答案: