Python QWebView.print_方法代码示例

# 需要导入模块: from PySide.QtWebKit import QWebView [as 别名]
# 或者: from PySide.QtWebKit.QWebView import print_ [as 别名]
def convert_html_to_pdf(
        source, destination, page_size=QPrinter.Letter,
        print_format=QPrinter.PdfFormat, timeout=10000, app=None):
    """Converts an .html file at the source to a .pdf at the destination

    Any external files linked in the source file must be paths relative to
    the location of the source file itself.  If building the html file
    dynamically, the rel_path function can be used to create proper
    relative paths using the .html location as the source location.

    The conversion is done using th ability of a QPrinter to print
    a QWebView to a PDF.  This means we must have some Qt bindings, either
    PySide (default) or PyQt4 (5 support incoming?), but then are only
    limited by what the QWebView can display.

    While the intent is so print to a PDF, the format parameter is exposed
    so that this can be used to print directly to a printer or (if >=Qt4.2)
    PostScript format.

    If this is being used in a larger QApplication, we should only have one
    instance of QApplication, so pass the existing instance to the `app`
    parameter.
    """
    if app is None:
        app = QApplication(sys.argv)

    view = QWebView()

    # We want to ensure the page was fully loaded before printing, so
    # we wait for the loadFinished event to fire.
    with wait_for_signal(view.loadFinished, timeout=timeout):
        # QUrl requires absolute path names
        view.load(QUrl.fromLocalFile(os.path.abspath(source)))

    # With the QWebView loaded, we now print to the destination PDF
    printer = QPrinter()
    printer.setPageSize(page_size)
    printer.setOutputFormat(print_format)
    printer.setOutputFileName(destination)
    view.print_(printer)

    # Exit the application
    app.exit()

# 需要导入模块: from PySide.QtWebKit import QWebView [as 别名]
# 或者: from PySide.QtWebKit.QWebView import print_ [as 别名]
class HTMLViewer(QtGui.QWidget):
    def __init__(self, parent=None):
        super(HTMLViewer, self).__init__(parent)

        self.view = QWebView(self)
        layout = QtGui.QVBoxLayout(self)
        layout.setSpacing(0)
        layout.setContentsMargins(0, 0, 0, 0)
        layout.addWidget(self.view)

        # Create ContextMenu
        context_menu = QtGui.QMenu(self.view)
        def open_context_menu(point):
            context_menu.exec_(self.view.mapToGlobal(point))
        self.view.setContextMenuPolicy(QtCore.Qt.CustomContextMenu)
        self.view.customContextMenuRequested.connect(open_context_menu)

        action = QtGui.QAction('&Back', self,
                shortcut=QtGui.QKeySequence.Back,
                statusTip="Click to go back",
                triggered=self.view.back)
        action.setShortcut('Backspace')
        context_menu.addAction(action)

        action = QtGui.QAction('&Forward', self,
                shortcut=QtGui.QKeySequence.Forward,
                statusTip="Click to go forward",
                triggered=self.view.forward)
        action.setShortcut('Shift + Backspace')
        context_menu.addAction(action)

        action = QtGui.QAction('&Reload', self,
                shortcut=QtGui.QKeySequence.Refresh,
                statusTip="Click to refresh",
                triggered=self.view.reload)
        context_menu.addAction(action)
        context_menu.addSeparator()

        action = QtGui.QAction('&Print', self,
                shortcut=QtGui.QKeySequence.Print,
                statusTip="Click to print",
                triggered=self.print_)
        context_menu.addAction(action)
        
    def contextMenuEvent(self, event):
        self.context_menu.exec_(event.globalPos())

    def print_(self):
        printer = QtGui.QPrinter()
        printer_dialog = QtGui.QPrintDialog(printer, self.view)
        if printer_dialog.exec_() != QtGui.QDialog.Accepted:
            # do nothing
            return
        # printout the view with selected printer
        self.view.print_(printer)

    # --- slots
    @QtCore.Slot(unicode)
    def update(self, value):
        # save vertical/horizontal scrollbar value
        m = self.view.page().mainFrame()
        v = m.scrollBarValue(QtCore.Qt.Vertical)
        h = m.scrollBarValue(QtCore.Qt.Horizontal)
        # set new HTML (value should be unicode)
        self.view.setHtml(value)
        # update vertical/horizontal scrollbar value
        m = self.view.page().mainFrame()
        m.setScrollBarValue(QtCore.Qt.Vertical, v)
        m.setScrollBarValue(QtCore.Qt.Horizontal, h)