Nine, Pyqt5 progress bar --QProgressBar

QProgressBar member progress bar, the progress bar is horizontal or vertical. In dealing with a longer time-consuming task, you might use the progress bar component. Because the image using the progress bar can tell the user's current task in progress.

Progress of common functions as follows:

function	value	content
setInvertedAppearance	True/False	Set to the progress bar. Ture: from left to right or top to bottom False: right to left or from bottom to top The default is True
setOrientation	Qt.Horizontal/ Qt.Vertical	Set the progress bar is horizontal, vertical. The default is level
setMinimum	0~99	Set the minimum, default 0
setMinimum	0~99	Set the maximum value, the default 99
setFormat	％p % v ％m	Text next to the progress bar display settings: Expressed as a percentage; It represents the current value; Expressed as total steps. The default is the percentage (% p).

Examples are as follows:

. 1  Import SYS, Time
 2  from PyQt5.QtWidgets Import the QApplication, the QWidget, QProgressBar, the QPushButton, QVBoxLayout,
 . 3  from PyQt5.QtCore Import the Qt
 . 4  
. 5  
. 6  class mywin (the QWidget):
 . 7      DEF  the __init__ (Self):
 . 8          . Super () the __init__ ( )
 . 9          self.setWindowTitle ( ' progress bar ' )
 10          self.step = 0 # initial value is set to 0 
. 11          self.initUI ()
 12 is  
13 is      DEFinitUI (Self):
 14          self.pbar = QProgressBar ()
 15  
16          self.pbar.setInvertedAppearance (False)    # to the progress bar 
. 17          self.pbar.setOrientation (Qt.Horizontal)    # direction of the progress bar 
18 is          self.btn the QPushButton = ( ' start ' , Self)
 . 19  
20 is          self.v_layout = QVBoxLayout, ()
 21 is          self.v_layout.addWidget (self.pbar)
 22 is          self.v_layout.addWidget (self.btn)
 23 is          self.setLayout (self.v_layout)
 24  
25          Self. btn.clicked.connect (self.action)
26 
27     def action(self):
28         self.pbar.setMinimum(0)
29         self.pbar.setMaximum(0)
30         while self.step < 1000:
31             self.pbar.setValue(self.step)
32             self.step += 1
33             time.sleep(0.001)
34         else:
35             self.step = 0
36             print('done')
37             self.pbar.setValue(self.step)
38 
39 
40 if __name__ == '__main__':
41      app = QApplication(sys.argv)
42      mywin = Mywin()
43      mywin.show()
44      sys.exit(app.exec_())

Marquee effect

Display as follows:

 

 Display for the Marquee effect, the text does not show progress. This is because the code was added to the

 self.pbar.setMinimum(0)
 self.pbar.setMaximum(0)

　　If the above two lines of code removed, displayed normal results, as follows: