98 lines
3 KiB
Python
98 lines
3 KiB
Python
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""" QWebEngineView in QPrintPreviewDialog"""
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"""
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Created on 2019-01-17 <br>
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description: 摘抄自 eric6 和 https://github.com/pandel/opsiPackageBuilder/blob/c0e660ecc8d4ec8fb8dc242d2174490c5dc67930/oPB/gui/utilities.py <br>
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author: 625781186@qq.com <br>
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site: https://github.com/625781186 <br>
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更多经典例子:https://github.com/892768447/PyQt <br>
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课件: https://github.com/625781186/WoHowLearn_PyQt5 <br>
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视频教程: https://space.bilibili.com/1863103/#/ <br>
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"""
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from PyQt5 import QtGui, QtWidgets, QtCore
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from PyQt5.QtCore import *
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from PyQt5.QtGui import *
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from PyQt5.QtWidgets import *
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from PyQt5.QtPrintSupport import *
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from PyQt5.QtWebEngineWidgets import *
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import sys
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class HtmlView(QWebEngineView):
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"""Subclass QWebView and connect to a QPrintPreviewDialog object"""
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def __init__(self, url="", parent=None, ):
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"""
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Constructor of HtmlView
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:param parent: parent of the view
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:param url: url to load, if set, a loadFInished signal is emitted
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"""
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super().__init__(parent)
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self.html = ""
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self.setUrl(QUrl(url))
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self.preview = QPrintPreviewDialog()
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self.textedit = QTextEdit()
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self.preview.paintRequested.connect(self.printPreview)
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if url != "":
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self.loadFinished.connect(self.execpreview)
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def execpreview(self, arg):
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self.preview.exec()
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# -------------法一------------- ↓
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## 通过将Html 写到textedit , 再将textedit渲染到printpreviewdialog
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# def execpreview(self, arg):
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# self.page().toHtml(self.setHtml_)
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# self.preview.exec()
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#
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# def printPreview(self, printer):
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#
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# self.textedit.print(printer)
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#
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# def setHtml_(self, html):
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#
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# self.textedit.setHtml(html)
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#
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# # small workaround to find the QPrintPreviewWidget inside the pre-defined dialog and force it to update its content
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# wdg = self.preview.findChild(QPrintPreviewWidget)
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# if wdg is not None:
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# wdg.updatePreview()
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# -------------法一------------- ↑
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def printPreview(self, printer):
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# 打印机颜色
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printer.setColorMode(QPrinter.GrayScale)
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# 起始页?
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printer.setPageOrder(QPrinter.FirstPageFirst)
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# 页边距
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printer.setPageMargins(
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1.0 * 10, 1.0 * 10, 1.0 * 10, 1.0 * 10,
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QPrinter.Millimeter
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)
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# 文档名
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# printer.setPrinterName("打印机里显示的文档名")
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# 设置DPI
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printer.setResolution(150)
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# ----------------------------------------------
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## !需要开启事件循环 , 否则无法渲染到 printpreviewdialog
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loop = QEventLoop()
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QTimer.singleShot(10000, loop.quit)
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self.page().print(printer,
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lambda *a: loop.quit() if loop and loop.isRunning() else None)
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loop.exec_()
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if __name__ == "__main__":
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app = QtWidgets.QApplication(sys.argv)
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main_window = HtmlView(url="file:///报警记录2019-04-12 16-52-53.html")
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main_window.show()
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app.exec_()
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