私は変更されたを使用するプロジェクトに取り組んでいますQWebView。次のエラーが表示されます。
Traceback (most recent call last):
File "/home/jorge/coders/universal-scraper/src/customwebview.py", line 63, in mouseMoveEvent
hittestresult = self.currentframe.hitTestContent(event.pos())
RuntimeError: Internal C++ object (PySide.QtWebKit.QWebFrame) already deleted.
PySide の落とし穴については既に読んでおり、ページの読み込みが終了したときに呼び出されるメソッドを使用して、そのオブジェクトを変更済みQtWebKit.QWebFrameの属性として保存しています。つまり、すべてがうまくいきました。QWebViewsetframeafterloadfinishedQWebView
機能的で最小限の例を次に示します (webelementinfo.pyテストを実行する前に、このコードと同じディレクトリにファイルを配置してください)。
#!/usr/bin/env python2
# coding: utf-8
# VENI, SANCTE SPIRITUS
from PySide.QtWebKit import QWebView
from PySide import QtCore, QtGui
try:
from . import webelementinfo
except ValueError:
import webelementinfo
class CustomQWebView(QWebView):
def __init__(self, *args, **kwargs):
""" Init the custom class
"""
super(CustomQWebView, self).__init__(*args, **kwargs)
self.colors = {0: QtGui.QColor(255, 165, 0, 127),
1: QtGui.QColor(135, 206, 235, 127),
2: QtGui.QColor(135, 235, 164, 127),
3: QtGui.QColor(235, 135, 206, 127),
4: QtGui.QColor(235, 164, 135, 127)}
self.color = None
self.currentframe = None
self.element = None
self.loadFinished.connect(self.setframeafterloadfinished)
self.selectCommentsArea()
@QtCore.Slot()
def selectCommentsArea(self):
""" For selecting the comment area
"""
self.setup_rectcolor_area(0)
@QtCore.Slot(QtGui.QMouseEvent)
def mouseMoveEvent(self, event):
super(CustomQWebView, self).mouseMoveEvent(event)
if self.drawrects:
if self.currentframe:
hittestresult = self.currentframe.hitTestContent(event.pos())
element = webelementinfo.WebElement(
hittestresult, self.color, self)
if not self.element:
self.element = element
elif self.element != element:
self.element = element
# FIXME: self.update should draw rects from WebElements too.
self.update()
@QtCore.Slot(QtGui.QPaintEvent)
def paintEvent(self, event):
# draw the content first
super(CustomQWebView, self).paintEvent(event)
if self.drawrects:
# then the rectangle
if self.element:
self.element.update()
def setframeafterloadfinished(self):
self.currentframe = self.page().mainFrame()
def setup_rectcolor_area(self, forarea):
"""Called when we want to select certain area of a web site
This method set-up the painter to a giving color so web elements are
drawn with a rect on top. Also activates the flag to allow painting
inside CustomQWebView.
:param int forarea: For which area we are going to set the painter\\
valid values are: 0 for Comments area, 1 for comment box, 2 for\\
commentator's user name, 3 for comment date and time, 4 for\\
commentary text.
"""
self.drawrects = True
self.color = self.colors[forarea]
# defines what we are looking to select
self.selecttype = forarea
if __name__ == "__main__":
app = QtGui.QApplication([])
mainwn = QtGui.QMainWindow()
mainwn.resize(800, 696)
centralwidget = QtGui.QWidget(mainwn)
centralwidget.resize(800, 600)
gridlayout = QtGui.QGridLayout(centralwidget)
web = CustomQWebView(parent=centralwidget)
gridlayout.addWidget(web, 0, 0, 1)
web.setUrl(QtCore.QUrl("http://duckduckgo.com"))
mainwn.show()
app.exec_()
WebElementこれは、私が作成して使用し始めた新しいクラスの定義を含む他のファイルです。
#!/usr/bin/env python2
# coding: utf-8
# VENI, SANCTE SPIRITUS
from PySide.QtWebKit import QWebElement, QWebHitTestResult
from PySide import QtGui
from PySide import QtCore
class WebElement(QtCore.QObject):
""" Holds information of webelements
"""
def __eq__(self, other):
if isinstance(other, WebElement):
return (self.web_element == other.web_element and
self.getrect() == other.getrect())
else:
raise ValueError("Not same objects")
def __ne__(self, other):
if isinstance(other, WebElement):
return (self.web_element != other.web_element and
self.getrect() != other.getrect())
else:
raise ValueError("Not same objects")
def __init__(self, hittestresult, color, parent=None):
super(WebElement, self).__init__(parent)
if (not isinstance(hittestresult, QWebHitTestResult) and
not isinstance(hittestresult, QWebElement)):
raise ValueError(
"Argument passed for 'hittestresult' is not"
" QtWebkit.QWenHitTestResult or QtWebkit.QWebElement instance"
)
if not isinstance(color, QtGui.QColor):
raise ValueError(
"Argument passed for 'color' is not QtGui.QColor instance"
)
try:
self.frame = hittestresult.frame()
except AttributeError:
self.frame = hittestresult.webFrame()
self.frame_scroll_x = self.frame.scrollPosition().x()
self.frame_scroll_y = self.frame.scrollPosition().y()
try:
rect = hittestresult.boundingRect()
except AttributeError:
rect = hittestresult.geometry()
self.element_rect_x = rect.x()
self.element_rect_y = rect.y()
self.element_rect_w = rect.width()
self.element_rect_h = rect.height()
try:
self.web_element = hittestresult.element()
except AttributeError:
self.web_element = hittestresult
self.color = color
self.color_darker = color.darker()
self.color_darker.setAlpha(255)
self.pen = QtGui.QPen(self.color_darker)
self.pen.setWidth(2)
#self.painter = QtGui.QPainter(self.parent)
self.painter = QtGui.QPainter()
self.painter.setPen(self.pen)
def update(self):
""" draw the rect for this element in the CustomQWebView
"""
rect = self.getrect()
rectf = QtCore.QRectF(rect)
self.painter.fillRect(rectf, self.color)
self.painter.drawRect(rectf)
def getrect(self):
""" Return the rect for this WebElement
"""
self.frame_scroll_x = self.frame.scrollPosition().x()
self.frame_scroll_y = self.frame.scrollPosition().y()
rect = QtCore.QRect()
rect.setRect(self.element_rect_x - self.frame_scroll_x,
self.element_rect_y - self.frame_scroll_y,
self.element_rect_w, self.element_rect_h)
return rect
私のプロジェクトは、何も変更していないかのように正しく動作するはずですが、これらの変更ではうまくいきません。私は何を間違っていますか？sについて何か不足していQWebFrameますか?