处理QTabletEvent时，如何将平板电脑的整个表面映射到Widget客户端区域？

Question

我正在尝试处理WACOM Intuos艺术平板电脑生成的QTabletEvent事件。在

我成功地完成了以下代码，但不得不将处理平板电脑事件的QWidget调整为Windows桌面的完整大小，以便从其所有表面（无论笔位于何处）接收平板电脑事件。默认情况下，平板电脑表面似乎映射到整个桌面。我想把它映射到我自己的widget客户端区域。在

怎么做？在

import sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *

class TabletSampleWindow(QWidget):
    def __init__(self, parent=None):
        super(TabletSampleWindow, self).__init__(parent)
        self.pen_is_down = False
        self.pen_x = 0
        self.pen_y = 0
        self.pen_pressure = 0
        self.text = ""
        # 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"
        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."
        else:
            self.text += " Pen is up."
        tabletEvent.accept()
        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_()