python - adding QProgress bar within QLineEdit in PyQt or PySide -

hi want add qprogressbar behind qlineedit, in safari browser or ie, here starting point how can hook progressbar , mylineedit when user done entering path progress bar should show progress while path opened !!!

from pyqt4 import qtgui, qtcore import sys  class progressbar(qtgui.qprogressbar):     """ docstring progressbar     """     def __init__(self, parent=none):         super(progressbar, self).__init__(parent)         self.timer = qtcore.qbasictimer()         self.step = 0         self.doaction()      def timerevent(self, e):          if self.step >= 100:              self.timer.stop()             return          self.step = self.step + 15         self.setvalue(self.step)      def doaction(self):          if self.timer.isactive():             self.timer.stop()         else:             self.timer.start(100, self)     class mylineedit(qtgui.qlineedit):     """ docstring mylineedit     """     def __init__(self, parent=none):         super(mylineedit, self).__init__(parent)         # want hook bar @ backgroind of mylineedit         pbar = progressbar()   class example(qtgui.qwidget):     def __init__(self, parent=none):         super(example, self).__init__(parent)          self.pbar = progressbar(self)         self.editbx = mylineedit(self.pbar)         newpalette = qtgui.qpalette()         newpalette.setcolor(self.editbx.backgroundrole(), qtcore.qt.transparent)         self.editbx.setpalette(newpalette)         self.editbx.settext("defaukt text set")         self.editbx.setstylesheet("qlineedit { border:none;}")         self.pbar.setstylesheet("qprogressbar {border:none;}")          self.initui()      def initui(self):         # self.pbar.setgeometry(30, 40, 200, 25)         self.setgeometry(300, 300, 280, 170)         self.setwindowtitle('qtgui.qprogressbar')         self.show()    def main():     app = qtgui.qapplication(sys.argv)     win = example()     sys.exit(app.exec_())  if __name__ == '__main__':     main() 

i looking forward add qcombobox in place of text entered can list other existing folders, not way qcompleter uses though becuase doesnt has of qcombobox, , not want allow user enter doesnt exists.

any appreciated.

i've attached example of qlineedit progress bar behind it. heavily influenced post: http://www.qtcentre.org/threads/54758-progress-bar-form-qlineedit-issue

basically have manage painting yourself. unfortunately didn't seem work when tried same thing qcombobox. suggest posting new question painting progress bar on qcombobox once it!

import sys pyqt4.qtgui import * pyqt4.qtcore import *  class mylineedit(qlineedit):     def __init__(self, parent=none):         qlineedit.__init__(self, parent)         self.timer = qbasictimer()         self.step = 0         self.doaction()      def timerevent(self, e):         if self.step >= 100:             self.timer.stop()             return          self.step = self.step + 10         self.repaint()              def doaction(self):         if self.timer.isactive():             self.timer.stop()         else:             self.timer.start(1000, self)      def generategradient(self, color):         gradient = qlineargradient(0, 0, 0, self.height());         m_defaultbasecolor = self.palette().color(qpalette.base)         gradient.setcolorat(0, m_defaultbasecolor)         gradient.setcolorat(0.15, color.lighter(120))         gradient.setcolorat(0.5, color)         gradient.setcolorat(0.85, color.lighter(120))         gradient.setcolorat(1, m_defaultbasecolor)         return gradient      def paintevent(self, event):         p = qpainter(self)         panel = qstyleoptionframev2()         self.initstyleoption(panel)         self.style().drawprimitive(qstyle.pe_panellineedit, panel, p, self)          # alternative painting qlineedit when widget has focus , progress bar finished         #if self.hasfocus() or self.step >= 100: qlineedit.paintevent(self, event)          # i've chosen paint         qlineedit.paintevent(self, event)          painter = qpainter(self)         lenap = qstyleoptionframev2()         self.initstyleoption(lenap)         backgroundrect = self.style().subelementrect(qstyle.se_lineeditcontents, lenap, self)          # alternative if statements might use instead...         #         # if not self.hasfocus() , self.step < 100:         # if self.step < 100:         if true:             loadingcolor = qcolor(116,192,250)             painter.setbrush(self.generategradient(loadingcolor))             painter.setpen(qt.transparent)             mid = int(backgroundrect.width()/100.0*self.step)             progressrect = qrect(backgroundrect.x(), backgroundrect.y(), mid, backgroundrect.height())             painter.drawrect(progressrect)              painter.setpen(qt.solidline)             painter.drawtext(backgroundrect, qt.alignleft|qt.alignvcenter, " " + self.text())   class window(qmainwindow):     def __init__(self):         qmainwindow.__init__(self)          self._control = qwidget()         self.setcentralwidget(self._control)          l = qvboxlayout(self._control)         e = mylineedit()         l.addwidget(e)         b = qpushbutton('a')         l.addwidget(b)          self.show()  if __name__ == '__main__':     app = qapplication(sys.argv)     ex = window()     sys.exit(app.exec_())