Question

我目前正在尝试从 Wacom 数位板中提取相关信息（坐标、压力等）并且已经能够成功地做到这一点，但是我与每个事件关联的时间戳有时是相同的或由于时钟而重叠错误。我想看看是否有办法在 PyQt5 中设置最大数据速率，以便将平板电脑数据限制在一致的 60 或 100 Hz？这将有助于在此数据上获得正确的时间戳，而不会出现波动/重复值。

这是我目前的代码，感谢您的任何想法！

from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
from PyQt5 import QtCore
import time 
import platform
import numpy as np 
import os

data = []

class TabletSampleWindow(QWidget):
    def __init__(self, parent=None):
        super(TabletSampleWindow, self).__init__(parent)
        # self.timer = QtCore.QTimer(self)
        # self.timer.timeout.connect(self.tabletEvent)
        # self.timer.start(2000)
        self.pen_is_down = False
        self.pen_x = 0
        self.pen_y = 0
        self.pen_pressure = 0
        self.text = ""
        # self.count = 0
        # Resizing the sample window to full desktop size:
        frame_rect = app.desktop().frameGeometry()
        width, height = frame_rect.width(), frame_rect.height()
        self.resize(width, height)
        self.move(-9, 0)
        self.setWindowTitle("Sample Tablet Event Handling")

    def tabletEvent(self, tabletEvent):
        self.pen_x = tabletEvent.globalX()
        self.pen_y = tabletEvent.globalY()
        self.pen_pressure = int(tabletEvent.pressure() * 100)
        if tabletEvent.type() == QTabletEvent.TabletPress:
            self.pen_is_down = True
            self.text = "TabletPress event"
        elif tabletEvent.type() == QTabletEvent.TabletMove:
            self.pen_is_down = True
            self.text = "TabletMove event"
        elif tabletEvent.type() == QTabletEvent.TabletRelease:
            self.pen_is_down = False
            self.text = "TabletRelease event"
        elif tabletEvent.type() == QTabletEvent.TabletEnterProximity:
            self.pen_is_down = False
            self.text = "TabletEnterProximity event"
        elif tabletEvent.type() == QTabletEvent.TabletLeaveProximity:
            self.pen_is_down = False
            # self.pen_x, self.pen_y, self.pen_pressure = None, None, None
            self.text = "TabletLeaveProximity event"
            
        tabletEvent.accept()
        t = time.time()
        self.text += " at x={0}, y={1}, pressure={2}%,".format(self.pen_x, self.pen_y, self.pen_pressure)
        if self.pen_is_down:
            self.text += " Pen is down. " + str(t)
        else:
            self.text += " Pen is up. " + str(t)
        data.append([t, self.pen_x, self.pen_y, self.pen_is_down, self.pen_pressure])
        self.update()

    def paintEvent(self, event):
        text = self.text
        i = text.find("\n\n")
        if i >= 0:
            text = text.left(i)
        painter = QPainter(self)
        painter.setRenderHint(QPainter.TextAntialiasing)
        painter.drawText(self.rect(), Qt.AlignTop | Qt.AlignLeft , text)

app = QApplication(sys.argv)
mainform = TabletSampleWindow()
mainform.show()
app.exec_()

# write data to file

使用 PyQt5 从 Wacom 平板电脑获取数据

0 个答案: