המרת קוד מPyQt5 לPyQt6

[הפצת אנקי]

אני מנסה להדפיס תוכן html המוצג בQWebEngineView על ידי מדפסת. להלן יובאו דוגמאות שמבצעות זאת על ידי מדפסת של Qt - QPrinter.
כאן יש דוגמא עובדת לpyqt5.
אני זקוק להמרה שלה לPyqt6.
ניסיתי לעשות זאת בעצמי ללא הצלחה.
יש כאן דוגמא מקבילה בqt5 ל C++
וכאן יש את אותה הדוגמא לqt6 לC++

זה הקוד שמובא בקישור הראשון לpyqt5.

from PyQt5.QtCore import (QCoreApplication, QEventLoop, QObject, QPointF, Qt,
                       QUrl, pyqtSlot)
from PyQt5.QtGui import QKeySequence, QPainter
from PyQt5.QtPrintSupport import QPrintDialog, QPrinter, QPrintPreviewDialog
from PyQt5.QtWebEngineWidgets import QWebEnginePage, QWebEngineView
from PyQt5.QtWidgets import QApplication, QDialog, QLabel, QProgressBar, QProgressDialog, QShortcut


class PrintHandler(QObject):
    def __init__(self, parent = None):
        super().__init__(parent)
        self.m_page = None
        self.m_inPrintPreview = False

    def setPage(self, page):
        assert not self.m_page
        self.m_page = page
        self.m_page.printRequested.connect(self.printPreview)

    @pyqtSlot()
    def print(self):
        printer = QPrinter(QPrinter.HighResolution)
        dialog = QPrintDialog(printer, self.m_page.view())
        if dialog.exec_() != QDialog.Accepted:
            return
        self.printDocument(printer)

    @pyqtSlot()
    def printPreview(self):
        if not self.m_page:
            return
        if self.m_inPrintPreview:
            return
        self.m_inPrintPreview = True
        printer = QPrinter()
        preview = QPrintPreviewDialog(printer, self.m_page.view())
        preview.paintRequested.connect(self.printDocument)
        preview.exec()
        self.m_inPrintPreview = False

    @pyqtSlot(QPrinter)
    def printDocument(self, printer):
        loop = QEventLoop()
        result = False

        def printPreview(success):
            nonlocal result
            result = success
            loop.quit()
        progressbar = QProgressDialog(self.m_page.view())
        progressbar.findChild(QProgressBar).setTextVisible(False)
        progressbar.setLabelText("Wait please...")
        progressbar.setRange(0, 0)
        progressbar.show()
        progressbar.canceled.connect(loop.quit)
        self.m_page.print(printer, printPreview)
        loop.exec_()
        progressbar.close()
        if not result:
            painter = QPainter()
            if painter.begin(printer):
                font = painter.font()
                font.setPixelSize(20)
                painter.setFont(font)
                painter.drawText(QPointF(10, 25), "Could not generate print preview.")
                painter.end()


def main():
    import sys

    QCoreApplication.setAttribute(Qt.AA_EnableHighDpiScaling)
    app = QApplication(sys.argv)
    app.setApplicationName("Previewer")

    view = QWebEngineView()
    view.setUrl(QUrl("https://stackoverflow.com/questions/59438021"))
    view.resize(1024, 750)
    view.show()

    handler = PrintHandler()
    handler.setPage(view.page())

    printPreviewShortCut = QShortcut(QKeySequence(Qt.CTRL + Qt.Key_P), view)
    printShortCut = QShortcut(QKeySequence(Qt.CTRL + Qt.SHIFT + Qt.Key_P), view)

    printPreviewShortCut.activated.connect(handler.printPreview)
    printShortCut.activated.connect(handler.print)

    sys.exit(app.exec_())


if __name__ == "__main__":
    main()

וזה מה שהספקתי לעשות לפני שהתייאשתי:

from PyQt6.QtCore import (QCoreApplication, QEventLoop, QObject, QPointF, Qt,
                       QUrl, pyqtSlot)
from PyQt6.QtGui import QKeySequence, QPainter, QShortcut
from PyQt6.QtPrintSupport import QPrintDialog, QPrinter, QPrintPreviewDialog, QAbstractPrintDialog
from PyQt6.QtWebEngineWidgets import QWebEngineView
from PyQt6.QtWidgets import QApplication, QDialog, QLabel, QProgressBar, QProgressDialog, QWidget


class PrintHandler(QObject):
    def __init__(self, parent = None):
        super().__init__(parent)
        self.m_page = None
        self.m_inPrintPreview = False

    def setPage(self, page):
        assert not self.m_page
        self.m_page = page
        self.m_page.printRequested.connect(self.printPreview)

    @pyqtSlot()
    def print(self):
        printer = QPrinter(QPrinter.PrinterMode.HighResolution)
        dialog = QPrintDialog(printer, self.m_page.view())
        if dialog.exec() != QDialog.accepted:
            return
        self.printDocument(printer)

    @pyqtSlot()
    def printPreview(self):
        if not self.m_page:
            return
        if self.m_inPrintPreview:
            return
        self.m_inPrintPreview = True
        printer = QPrinter()
        preview = QPrintPreviewDialog(printer)
        preview.paintRequested.connect(self.printDocument)
        preview.exec()
        self.m_inPrintPreview = False

    @pyqtSlot(QPrinter)
    def printDocument(self, printer):
        loop = QEventLoop()
        result = False

        def printPreview(success):
            nonlocal result
            result = success
            loop.quit()
        progressbar = QProgressDialog(self.m_page.view())
        progressbar.findChild(QProgressBar).setTextVisible(False)
        progressbar.setLabelText("Wait please...")
        progressbar.setRange(0, 0)
        progressbar.show()
        progressbar.canceled.connect(loop.quit)
        self.m_page.print(printer, printPreview)
        loop.exec_()
        progressbar.close()
        if not result:
            painter = QPainter()
            if painter.begin(printer):
                font = painter.font()
                font.setPixelSize(20)
                painter.setFont(font)
                painter.drawText(QPointF(10, 25), "Could not generate print preview.")
                painter.end()


def main():
    import sys

    # QCoreApplication.setAttribute(Qt.AA_EnableHighDpiScaling)
    app = QApplication(sys.argv)
    app.setApplicationName("Previewer")


    view = QWebEngineView()
    view.setUrl(QUrl("https://stackoverflow.com/questions/59438021"))
    view.resize(1024, 750)
    view.show()


    # printPreviewShortCut = QShortcut(QKeySequence(Qt.CTRL + Qt.Key_P), view)
    # printShortCut = QShortcut(QKeySequence(Qt.CTRL + Qt.SHIFT + Qt.Key_P), view)



    import threading
    def gfg():
        print("1234")
        handler = PrintHandler()
        handler.setPage(view.page())
        handler.print()
        # handler.printPreview()

    timer = threading.Timer(7.0, gfg)
    timer.start()

    sys.exit(app.exec())


if __name__ == "__main__":
    main()

תודה.

[הפצת אנקי]

אולי מישהו יודע בכל זאת?
(אני מעוניין להפיץ גרסת בדיקה חדשה וזה מתעכב רק בגלל הבעיה הזאת)