使用 pyside 克隆 QtWebKit Fancy Browser

这两天算真正接触 QtWebKit 的功能，实在是强大无比，加上 pyside 可以快速实现浏览器的很多功能。在网上找了 pyside + QtWebKit 的例子程序，其实能找到的例子很少。所以就借着克隆Qt自带的Fancy Browser 作为一个起点，写个pyside + QtWebKit的浏览器程序。

 

目前的状况：

  • 实现了界面菜单的功能：调用Javascript进行图片翻转，a元素的高亮显示。增加高亮操作的取消功能。
  • 修复Javascript执行无法立即返回的BUG。
  • 初步实现网页保存为图片的功能。

 

  1 #coding:utf8
  2 
  3 import sys
  4 from PySide import QtCore
  5 from PySide import QtGui
  6 from PySide import QtWebKit
  7 from PySide import QtNetwork
  8 from pprint import pprint
  9 from PySide.QtGui import QImage
 10 from PySide.QtGui import QPainter
 11 from PySide.QtCore import QFile, QIODevice
 12 
 13 class Mainwin(QtGui.QMainWindow):
 14     def __init__(self, parent= None):
 15         super(Mainwin, self).__init__( parent)
 16 
 17         QtNetwork.QNetworkProxyFactory.setUseSystemConfiguration(True)
 18 
 19         splitter = self.splitter = QtGui.QSplitter(self)
 20 
 21         self.view = QtWebKit.QWebView(splitter)
 22         #self.view.load("about:blank")
 23         self.view.load("http://www.baidu.com")
 24         self.view.loadStarted.connect(self.adjustLocation)
 25         self.view.titleChanged.connect(self.adjustTitle)
 26         self.view.loadProgress.connect(self.setProgress)
 27         self.view.loadFinished.connect(self.adjustLocation)
 28 
 29         self.locationEdit = QtGui.QLineEdit(self)
 30         self.locationEdit.setSizePolicy(QtGui.QSizePolicy.Expanding,
 31                 self.locationEdit.sizePolicy().verticalPolicy())
 32         self.locationEdit.returnPressed.connect(self.changeLocation)
 33 
 34         toolBar = self.addToolBar("Navigation")
 35         toolBar.addAction(self.view.pageAction(QtWebKit.QWebPage.Back))
 36         toolBar.addAction(self.view.pageAction(QtWebKit.QWebPage.Forward))
 37         toolBar.addAction(self.view.pageAction(QtWebKit.QWebPage.Reload))
 38         toolBar.addAction(self.view.pageAction(QtWebKit.QWebPage.Stop))
 39         act = QtGui.QAction(self)
 40         toolBar.addAction(act)
 41         act.triggered.connect(self.loadPage)
 42         toolBar.addWidget(self.locationEdit)
 43 
 44         viewMenu = self.menuBar().addMenu("&View")
 45         viewSourceAction = QtGui.QAction("Page Source", self)
 46         viewSourceAction.triggered.connect(self.viewSource)
 47         viewMenu.addAction(viewSourceAction)
 48 
 49         savePageAction = QtGui.QAction("Save page as image", self)
 50         savePageAction.triggered.connect(self.savePage)
 51         viewMenu.addAction(savePageAction)
 52 
 53         effectMenu = self.menuBar().addMenu("&Effect")
 54         highlightLinkAction = QtGui.QAction("Highlight all links", self)
 55         highlightLinkAction.setCheckable(True);
 56         highlightLinkAction.toggled.connect(self.highlightAllLinks)
 57         effectMenu.addAction(highlightLinkAction);
 58 
 59         rotateImageAction = QtGui.QAction("Turn images upside down", self)
 60         rotateImageAction.setCheckable(True);
 61         rotateImageAction.toggled.connect(self.turnUpDownImages)
 62         effectMenu.addAction(rotateImageAction)
 63 
 64 #        listview =  QtGui.QListView()
 65 #        splitter.addWidget(listview)
 66 #        treeview =  QtGui.QTreeView()
 67 #        splitter.addWidget(treeview)
 68         textedit =  QtGui.QTextEdit()
 69         splitter.addWidget(textedit)
 70 
 71         splitter.addWidget(self.view)
 72 
 73         self.setCentralWidget(splitter)
 74 
 75         sb = self.createStatusbar()
 76         self.setStatusBar(sb)
 77         page = self.view.page()
 78         page.linkHovered.connect(self.linkHovered)
 79         #act.connect(sb.showMessage)
 80         frame = page.mainFrame()
 81         frame.loadFinished.connect(self.load_finished)
 82 
 83     def loadPage(self):
 84         self.view.load("http://localhost")
 85 
 86     def load_finished(self):
 87         file = QFile("jquery.min.js");
 88         file.open(QIODevice.ReadOnly | QIODevice.Text);
 89         jQuery = file.readAll().data();
 90         file.close();
 91         self.view.page().mainFrame().evaluateJavaScript(jQuery)
 92 
 93     def linkHovered(self, p):
 94         sb = self.statusBar()
 95         sb.showMessage(p)
 96 
 97     def viewSource(self):
 98         accessManager = self.view.page().networkAccessManager()
 99         request = QtNetwork.QNetworkRequest(self.view.url())
100         reply = accessManager.get(request)
101         reply.finished.connect(self.slotSourceDownloaded)
102 
103     def savePage(self):
104         size = self.view.page().mainFrame().contentsSize()
105         image = QImage(size, QImage.Format_ARGB32_Premultiplied)
106         image.fill(QtCore.Qt.transparent)
107         p = QPainter(image)
108         p.setRenderHint(QPainter.Antialiasing, 1)
109         p.setRenderHint(QPainter.TextAntialiasing, 1)
110         p.setRenderHint(QPainter.SmoothPixmapTransform, 1)
111         self.view.page().setViewportSize(self.view.page().mainFrame().contentsSize())
112         self.view.page().mainFrame().render(p)
113         p.end();
114         image.save("capture.png")
115 
116     def turnUpDownImages(self, checked):
117         print checked
118         if (checked):
119             code = "$('img').each( function () { $(this).css('-webkit-transition', '-webkit-transform 1s'); $(this).css('-webkit-transform', 'rotate(180deg)') } ); null"
120         else:
121             code = "$('img').each( function () { $(this).css('-webkit-transition', '-webkit-transform 1s'); $(this).css('-webkit-transform', 'rotate(0deg)') } ); null"
122         self.view.page().mainFrame().evaluateJavaScript(code)
123 
124     def highlightAllLinks(self, checked):
125         if checked:
126             code = "$('a').each( function () { $(this).css('background-color', 'yellow') }); null";
127         else:
128             code = "$('a').each( function () { $(this).css('background-color', '') } ); null";
129         self.view.page().mainFrame().evaluateJavaScript(code);
130 
131     def slotSourceDownloaded(self):
132         reply = self.sender()
133         self.textEdit = QtGui.QTextEdit(None)
134         self.textEdit.setAttribute(QtCore.Qt.WA_DeleteOnClose)
135         self.textEdit.show()
136         self.textEdit.setPlainText(QtCore.QTextStream(reply).readAll())
137         self.textEdit.resize(600, 400)
138         reply.deleteLater()
139 
140     def createStatusbar(self):
141         sb = self.statusBar()
142         sb.progress = QtGui.QProgressBar()
143         sb.addPermanentWidget(sb.progress)
144         return sb
145 
146     def adjustTitle(self):
147         self.setWindowTitle(self.view.title())
148 
149     def adjustLocation(self):
150         self.locationEdit.setText(self.view.url().toString())
151 
152     def changeLocation(self):
153         url = QtCore.QUrl.fromUserInput(self.locationEdit.text())
154         self.view.load(url)
155         self.view.setFocus()
156 
157     def setProgress(self, progress):
158         self.statusBar().progress.setValue(progress)
159 
160 
161 def main():
162     app = QtGui.QApplication(sys.argv)
163     mw = Mainwin()
164     mw.show()
165     app.exec_()
166 
167 
168 if __name__ == "__main__":
169     main()

 

参考链接：

http://stackoverflow.com/questions/1409522/qt4-how-to-call-javascript-functions-in-a-page-from-c-via-qtwebkit

posted @ 2012-09-02 13:44  独木  阅读(1818)  评论(1)  编辑  收藏  举报