Paint ticks sur personnalisé QProgressBar dans Pyside

Question

J'essaie de peindre quelques ticks dans ma barre de progression personnalisée, mais je ne comprends pas pourquoi la ligne n'apparaît pas du tout?

import sys 
import os 

sys.path.append('Z:\\pipeline\\site-packages') 
sys.path.append(os.path.dirname(os.path.abspath(__file__))) 

from PySide import QtGui, QtCore 

class QProgressBarPro(QtGui.QProgressBar): 

    progressClicked = QtCore.Signal() 
    progressChanging = QtCore.Signal() 
    progressChanged = QtCore.Signal() 

    def __init__(self, parent=None): 
     super(QProgressBarPro, self).__init__(parent) 
     self.default_value = 50.0 
     self.lmb_pressed = False 
     self.setFormat('%p') 
     self.setRange(0.0, 100.0) 
     self.stepEnabled = True 
     self.step = 5 
     self.setToolTip('<strong>Press+Hold+Ctrl</strong> for percise values<br><strong>Right-Click</strong> to reset default value') 

    def step_round(self, x, base=5): 
     return int(base * round(float(x)/base)) 

    def set_value_from_cursor(self, xpos): 
     width = self.frameGeometry().width() 
     percent = float(xpos)/width 
     val = self.maximum() * percent 

     if self.stepEnabled: 
      modifiers = QtGui.QApplication.keyboardModifiers() 
      if modifiers != QtCore.Qt.ControlModifier: 
       val = self.step_round(val, self.step) 

     self.setValue(val) 

    def mousePressEvent(self, event): 
     self.progressClicked.emit() 
     mouse_button = event.button() 

     if mouse_button == QtCore.Qt.RightButton: 
      self.setValue(self.default_value) 
     else: 
      xpos = event.pos().x() 
      self.set_value_from_cursor(xpos) 
      self.lmb_pressed = True 
     self.progressChanging.emit() 

    def mouseReleaseEvent(self, event): 
     self.lmb_pressed = False 
     self.progressChanged.emit() 

    def mouseMoveEvent(self, event): 
     if self.lmb_pressed: 
      xpos = event.pos().x() 
      self.set_value_from_cursor(xpos) 
      self.progressChanging.emit() 

    def paintEvent(self, event): 
     painter = QtGui.QPainter() 
     painter.drawLine(10, 0, 10, 10) 
     QtGui.QProgressBar.paintEvent(self, event) 


# DEMO 
class Example(QtGui.QWidget): 

    def __init__(self): 
     super(Example, self).__init__() 

     self.initUI() 

    def initUI(self): 

     self.ui_progress = QProgressBarPro() 
     self.ui_progress.setAlignment(QtCore.Qt.AlignRight | QtCore.Qt.AlignVCenter) 
     self.ui_progress.setValue(10) 

     gdl = QtGui.QVBoxLayout() 
     gdl.addWidget(self.ui_progress) 
     self.setLayout(gdl) 

     self.resize(300, 300) 
     self.setWindowTitle('Tooltips')  
     self.show() 

def main(): 

    app = QtGui.QApplication(sys.argv) 
    ex = Example() 
    sys.exit(app.exec_()) 


if __name__ == '__main__': 
    main() 

Answer 1

Vous devez changer votre fonction paintEvent.

j'ai écrit une première approche qui fournit le même résultat que dans l'image:

def paintEvent(self, event): 
    QtGui.QProgressBar.paintEvent(self, event) 
    painter = QtGui.QPainter(self) 
    brush = QtGui.QBrush(QtCore.Qt.SolidPattern) 
    # Set gray color 
    brush.setColor(QtGui.QColor(204,204,204)) 
    painter.setPen(QtGui.QPen(brush, 2, QtCore.Qt.SolidLine,QtCore.Qt.RoundCap)) 
    #print(str(self.width())+","+str(self.height())) 
    progressbarwidth = self.width() 
    progressbarheight = self.height() 
    ## Drawing one vertical line each 1/5 
    painter.drawLine(progressbarwidth*1/5, 0, progressbarwidth*1/5, progressbarheight) 
    painter.drawLine(progressbarwidth*2/5, 0, progressbarwidth*2/5, progressbarheight) 
    painter.drawLine(progressbarwidth*3/5, 0, progressbarwidth*3/5, progressbarheight) 
    painter.drawLine(progressbarwidth*4/5, 0, progressbarwidth*4/5, progressbarheight) 

Le résultat obtenu est montré here.