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.
