Python - PyQt5 – Ohidur's Blog

Install PyQt5

pip install pyqt5
pip install pyqt5-tools

Convert .ui file to .py

pyuic5 -x demo.ui -o demo.py

QLabel

lable=QLabel()

Signals

linkActivated: If the label containing embedded hyperlink is clicked, the URL will open. setOpenExternalLinks feature must be set to true.
linkHovered: Slot method associated with this signal will be called when the label having embedded hyperlinked is hovered by the mouse.

Methods

setText()
setAlignment()
setPixmap(QPixmap(‘image.png’))
setOpenExternalLinks(bool)
setTextInteractionFlags(Qt.TextSelectableByMouse)

Example

import sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *

def l2_clicked():
    print("L2 Clicked")

def l2_hover():
    print("L2 Hover")


app=QApplication(sys.argv)


window=QWidget()

vLayout=QVBoxLayout()

# QLabel

l1=QLabel()
l1.setText("This is a label")
l1.setAlignment(Qt.AlignCenter)

l2=QLabel()
l2.setText("https://www.ohidur.com")
l2.setOpenExternalLinks(True)
l2.linkHovered.connect(l2_hover)
l2.linkActivated.connect(l2_clicked)



l3=QLabel()
l3.setPixmap(QPixmap('vs.png'))

l4=QLabel()
l4.setText("This text is selectable")
l4.setAlignment(Qt.AlignRight)
l4.setTextInteractionFlags(Qt.TextSelectableByMouse)


vLayout.addWidget(l1)
vLayout.addWidget(l2)
vLayout.addWidget(l3)
vLayout.addWidget(l4)


window.setLayout(vLayout)
window.show()
sys.exit(app.exec())

QLineEdit

Methods

setAlignment()
clear()
setEchoMode()
setMaxLength()
setReadOnly()
setText()
text()
setValidator()
setInputMask()
setFont()

Alignment

Qt.AlignLeft
Qt.AlignRight
Qt.AlignCenter
Qt.AlignJustify

Echo Mode
QLineEdit.Normal
QLineEdit.NoEcho
QLineEdit.Password
QLineEdit.PasswordEchoOnEdit

Validation Rules

QIntValidator − Restricts input to integer
QDoubleValidator − Fraction part of number limited to specified decimals
QRegexpValidator − Checks input against a Regex expression

Signals

cursorPositionChanged()
editingFinished()
returnPressed()
selectionChanged()
textChanged()
textEdited()

import sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *

def window():
   app = QApplication(sys.argv)
   win = QWidget()
	
   e1 = QLineEdit()
   e1.setValidator(QIntValidator())
   e1.setMaxLength(4)
   e1.setAlignment(Qt.AlignRight)
   e1.setFont(QFont("Arial",20))
	
   e2 = QLineEdit()
   e2.setValidator(QDoubleValidator(0.99,99.99,2))
	
   flo = QFormLayout()
   flo.addRow("integer validator", e1)
   flo.addRow("Double validator",e2)
	
   e3 = QLineEdit()
   e3.setInputMask('+99_9999_999999')
   flo.addRow("Input Mask",e3)
	
   e4 = QLineEdit()
   e4.textChanged.connect(textchanged)
   flo.addRow("Text changed",e4)
	
   e5 = QLineEdit()
   e5.setEchoMode(QLineEdit.Password)
   flo.addRow("Password",e5)
	
   e6 = QLineEdit("Hello Python")
   e6.setReadOnly(True)
   flo.addRow("Read Only",e6)
	
   e5.editingFinished.connect(enterPress)
   win.setLayout(flo)
   win.setWindowTitle("PyQt")
   win.show()
	
   sys.exit(app.exec_())

def textchanged(text):
   print ("contents of text box: "+text)
	
def enterPress():
   print ("edited")

if __name__ == '__main__':
   window()

QPushButton

Methods

setCheckable()
toggle()
isChecked()
setIcon()
setText()
setDefault()
text()
setEnabled()
setFont()

Signals

clicked

import sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *

class Form(QDialog):
   def __init__(self, parent=None):
      super(Form, self).__init__(parent)
		
      layout = QVBoxLayout()
      self.b1 = QPushButton("Button1")
      self.b1.setCheckable(True)
      self.b1.toggle()
      self.b1.clicked.connect(lambda:self.whichbtn(self.b1))
      self.b1.clicked.connect(self.btnstate)
      layout.addWidget(self.b1)
		
      self.b2 = QPushButton()
      self.b2.setIcon(QIcon(QPixmap("python.gif")))
      self.b2.clicked.connect(lambda:self.whichbtn(self.b2))
      layout.addWidget(self.b2)
      self.setLayout(layout)
      self.b3 = QPushButton("Disabled")
      self.b3.setEnabled(False)
      layout.addWidget(self.b3)
		
      self.b4 = QPushButton("&Default")
      self.b4.setDefault(True)
      self.b4.clicked.connect(lambda:self.whichbtn(self.b4))
      layout.addWidget(self.b4)
      
      self.setWindowTitle("Button demo")

   def btnstate(self):
      if self.b1.isChecked():
         print ("button pressed")
      else:
         print ("button released")
			
   def whichbtn(self,b):
      print ("clicked button is "+b.text())

def main():
   app = QApplication(sys.argv)
   ex = Form()
   ex.show()
   sys.exit(app.exec_())
	
if __name__ == '__main__':
   main()

QRadioButton

Methods

setChecked()
isChecked()
setText()
text()

Signals

toggled

Radio buttons can also be put in a QGroupBox or QButtonGroup to create more than one selectable fields on the parent window.

import sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *

class Radiodemo(QWidget):
   def __init__(self, parent = None):
      super(Radiodemo, self).__init__(parent)
		
      layout = QHBoxLayout()
      self.b1 = QRadioButton("Button1")
      self.b1.setChecked(True)
      self.b1.toggled.connect(lambda:self.btnstate(self.b1))
      layout.addWidget(self.b1)
		
      self.b2 = QRadioButton("Button2")
      self.b2.toggled.connect(lambda:self.btnstate(self.b2))

      layout.addWidget(self.b2)
      self.setLayout(layout)
      self.setWindowTitle("RadioButton demo")
		
   def btnstate(self,b):
      if b.text() == "Button1":
         if b.isChecked() == True:
            print (b.text()+" is selected")
         else:
            print (b.text()+" is deselected")
				
      if b.text() == "Button2":
         if b.isChecked() == True:
            print (b.text()+" is selected")
         else:
            print (b.text()+" is deselected")
				
def main():

   app = QApplication(sys.argv)
   ex = Radiodemo()
   ex.show()
   sys.exit(app.exec_())
	
if __name__ == '__main__':
   main()

QCheckBox

Methods

setChecked()
isChecked()
setText()
text()
setTriState() : Provides no change state to checkbox

Signals

toggled
stateChanged

import sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *

class checkdemo(QWidget):
   def __init__(self, parent = None):
      super(checkdemo, self).__init__(parent)
      
      layout = QHBoxLayout()
      self.b1 = QCheckBox("Button1")
      self.b1.setChecked(True)
      self.b1.stateChanged.connect(lambda:self.btnstate(self.b1))
      layout.addWidget(self.b1)
		
      self.b2 = QCheckBox("Button2")
      self.b2.toggled.connect(lambda:self.btnstate(self.b2))

      layout.addWidget(self.b2)
      self.setLayout(layout)
      self.setWindowTitle("checkbox demo")

   def btnstate(self,b):
      if b.text() == "Button1":
         if b.isChecked() == True:
            print (b.text()+" is selected")
         else:
            print (b.text()+" is deselected")
				
      if b.text() == "Button2":
         if b.isChecked() == True:
            print (b.text()+" is selected")
         else:
            print (b.text()+" is deselected")
				
def main():

   app = QApplication(sys.argv)
   ex = checkdemo()
   ex.show()
   sys.exit(app.exec_())
	
if __name__ == '__main__':
   main()

QComboBox

Methods

addItem()
addItems()
clear()
count()
currentText()
itemText()
currentIndex()
setItemText()

Signals

activated() : When the user chooses an item
currentIndexChanged()
highlighted() : When an item in the list is highlighted

import sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *

class combodemo(QWidget):
   def __init__(self, parent = None):
      super(combodemo, self).__init__(parent)
      
      layout = QHBoxLayout()
      self.cb = QComboBox()
      self.cb.addItem("C")
      self.cb.addItem("C++")
      self.cb.addItems(["Java", "C#", "Python"])
      self.cb.currentIndexChanged.connect(self.selectionchange)
		
      layout.addWidget(self.cb)
      self.setLayout(layout)
      self.setWindowTitle("combo box demo")

   def selectionchange(self,i):
      print ("Items in the list are :")
		
      for count in range(self.cb.count()):
         print (self.cb.itemText(count))
      print ("Current index",i,"selection changed ",self.cb.currentText())
		
def main():
   app = QApplication(sys.argv)
   ex = combodemo()
   ex.show()
   sys.exit(app.exec_())

if __name__ == '__main__':
   main()

QSpinBox

Methods

setMinimum()
setMaximum()
setRange() : Sets the minimum, maximum and step value
setValue()
Value() : Returns the current value
singleStep() : Sets the step value of counter

Signals

valueChanged

import sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *

class spindemo(QWidget):
   def __init__(self, parent = None):
      super(spindemo, self).__init__(parent)
      
      layout = QVBoxLayout()
      self.l1 = QLabel("current value:")
      self.l1.setAlignment(Qt.AlignCenter)
      layout.addWidget(self.l1)
      self.sp = QSpinBox()
		
      layout.addWidget(self.sp)
      self.sp.valueChanged.connect(self.valuechange)
      self.setLayout(layout)
      self.setWindowTitle("SpinBox demo")
		
   def valuechange(self):
      self.l1.setText("current value:"+str(self.sp.value()))

def main():
   app = QApplication(sys.argv)
   ex = spindemo()
   ex.show()
   sys.exit(app.exec_())
	
if __name__ == '__main__':
   main()

QSlider

Methods

setMinimum()
setMaximum()
setRange() : Sets the minimum, maximum and step value
setValue()
setTickInterval(): Puts the number of ticks on the groove
Value() : Returns the current value
setSingleStep() : Sets the step value of counter
setTickPosition()

Tick positions

QSlider.NoTicks No tick marks
QSlider.TicksBothSides Tick marks on both sides
QSlider.TicksAbove Tick marks above the slider
QSlider.TicksBelow Tick marks below the slider
QSlider.TicksLeft Tick marks to the left of the slider
QSlider.TicksRight Tick marks to the right of the slider

Signals

valueChanged
sliderPressed
sliderMoved
sliderReleased

import sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *

class sliderdemo(QWidget):
   def __init__(self, parent = None):
      super(sliderdemo, self).__init__(parent)

      layout = QVBoxLayout()
      self.l1 = QLabel("Hello")
      self.l1.setAlignment(Qt.AlignCenter)
      layout.addWidget(self.l1)
		
      self.sl = QSlider(Qt.Horizontal)
      self.sl.setMinimum(10)
      self.sl.setMaximum(30)
      self.sl.setValue(20)
      self.sl.setTickPosition(QSlider.TicksBelow)
      self.sl.setTickInterval(5)
		
      layout.addWidget(self.sl)
      self.sl.valueChanged.connect(self.valuechange)
      self.setLayout(layout)
      self.setWindowTitle("SpinBox demo")

   def valuechange(self):
      size = self.sl.value()
      self.l1.setFont(QFont("Arial",size))
		
def main():
   app = QApplication(sys.argv)
   ex = sliderdemo()
   ex.show()
   sys.exit(app.exec_())
	
if __name__ == '__main__':
   main()

QMenubar QMenu QAction

Methods

menuBar(): Returns main window’s QMenuBar object
addMenu()
addAction()
setEnabled()
addSeparator()
Clear()
setShortcut(): Associates keyboard shortcut to action button
setText()
setTitle()
text()
title()

Signals

triggered()

import sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *

class menudemo(QMainWindow):
   def __init__(self, parent = None):
      super(menudemo, self).__init__(parent)
		
      layout = QHBoxLayout()
      bar = self.menuBar()
      file = bar.addMenu("File")
      file.addAction("New")
		
      save = QAction("Save",self)
      save.setShortcut("Ctrl+S")
      file.addAction(save)
		
      edit = file.addMenu("Edit")
      edit.addAction("copy")
      edit.addAction("paste")
		
      quit = QAction("Quit",self) 
      file.addAction(quit)
      file.triggered[QAction].connect(self.processtrigger)
      self.setLayout(layout)
      self.setWindowTitle("menu demo")
		
   def processtrigger(self,q):
      print (q.text()+" is triggered")
		
def main():
   app = QApplication(sys.argv)
   ex = menudemo()
   ex.show()
   sys.exit(app.exec_())
	
if __name__ == '__main__':
   main()

QToolBar

Methods

addWidget()
setMovable()
addAction()
addSeparator()
setOrientation()
addToolBar()

Signals

actionTriggered

import sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *

class tooldemo(QMainWindow):
   def __init__(self, parent = None):
      super(tooldemo, self).__init__(parent)
      layout = QVBoxLayout()
      tb = self.addToolBar("File")
		
      new = QAction(QIcon("new.bmp"),"new",self)
      tb.addAction(new)
		
      open = QAction(QIcon("open.bmp"),"open",self)
      tb.addAction(open)
      save = QAction(QIcon("save.bmp"),"save",self)
      tb.addAction(save)
      tb.actionTriggered[QAction].connect(self.toolbtnpressed)
      self.setLayout(layout)
      self.setWindowTitle("toolbar demo")
		
   def toolbtnpressed(self,a):
      print ("pressed tool button is",a.text())
		
def main():
   app = QApplication(sys.argv)
   
   ex = tooldemo()
   ex.show()
   sys.exit(app.exec_())
	
if __name__ == '__main__':
   main()

QInputDialog

Methods

getInt()
getDouble()
getText()
getItem()

import sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *

class inputdialogdemo(QWidget):
   def __init__(self, parent = None):
      super(inputdialogdemo, self).__init__(parent)
		
      layout = QFormLayout()
      self.btn = QPushButton("Choose from list")
      self.btn.clicked.connect(self.getItem)
		
      self.le = QLineEdit()
      layout.addRow(self.btn,self.le)
      self.btn1 = QPushButton("get name")
      self.btn1.clicked.connect(self.gettext)
		
      self.le1 = QLineEdit()
      layout.addRow(self.btn1,self.le1)
      self.btn2 = QPushButton("Enter an integer")
      self.btn2.clicked.connect(self.getint)
		
      self.le2 = QLineEdit()
      layout.addRow(self.btn2,self.le2)
      self.setLayout(layout)
      self.setWindowTitle("Input Dialog demo")
		
   def getItem(self):
      items = ("C", "C++", "Java", "Python")
		
      item, ok = QInputDialog.getItem(
         self, "select input dialog", "list of languages", items, 0, False
      )
			
      if ok and item:
         self.le.setText(item)
			
   def gettext(self):
      text, ok = QInputDialog.getText(self, 'Text Input Dialog', 'Enter your name:')
		
      if ok:
         self.le1.setText(str(text))
			
   def getint(self):
      num,ok = QInputDialog.getInt(self,"integer input dualog","enter a number")
		
      if ok:
         self.le2.setText(str(num))
			
def main():
   app = QApplication(sys.argv)
   ex = inputdialogdemo()
   ex.show()
   sys.exit(app.exec_())
	
if __name__ == '__main__':
   main()

QFontDialog

Methods

getFont()

import sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *

class fontdialogdemo(QWidget):
   def __init__(self, parent = None):
      super(fontdialogdemo, self).__init__(parent)
		
      layout = QVBoxLayout()
      self.btn = QPushButton("choose font")
      self.btn.clicked.connect(self.getfont)
		
      layout.addWidget(self.btn)
      self.le = QLabel("Hello")
		
      layout.addWidget(self.le)
      self.setLayout(layout)
      self.setWindowTitle("Font Dialog demo")
		
   def getfont(self):
      font, ok = QFontDialog.getFont()
		
      if ok:
         self.le.setFont(font)
			
def main():
   app = QApplication(sys.argv)
   ex = fontdialogdemo()
   ex.show()
   sys.exit(app.exec_())
	
if __name__ == '__main__':
   main()

QFileDialog

Methods

getOpenFileName()
getSaveFileName()
setacceptMode()
setFileMode()
setFilter()

AcceptMode

QFileDialog.AcceptOpen
QFileDialog.AcceptSave

File Mode
QFileDialog.AnyFile
QFileDialog.ExistingFile
QFileDialog.Directory
QFileDialog.ExistingFiles

import sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *

class filedialogdemo(QWidget):
   def __init__(self, parent = None):
      super(filedialogdemo, self).__init__(parent)
		
      layout = QVBoxLayout()
      self.btn = QPushButton("QFileDialog static method demo")
      self.btn.clicked.connect(self.getfile)
		
      layout.addWidget(self.btn)
      self.le = QLabel("Hello")
		
      layout.addWidget(self.le)
      self.btn1 = QPushButton("QFileDialog object")
      self.btn1.clicked.connect(self.getfiles)
      layout.addWidget(self.btn1)
		
      self.contents = QTextEdit()
      layout.addWidget(self.contents)
      self.setLayout(layout)
      self.setWindowTitle("File Dialog demo")
		
   def getfile(self):
      fname,ba = QFileDialog.getOpenFileName(self, 'Open file', 
         'c:\\',"Image files (*.jpg *.gif)")
      self.le.setPixmap(QPixmap(fname))
		
   def getfiles(self):
      dlg = QFileDialog()
      dlg.setFileMode(QFileDialog.AnyFile)
    #   dlg.setFilter("Text files (*.txt)")
      filenames = QStringListModel()
		
      if dlg.exec_():
         filenames = dlg.selectedFiles()
         f = open(filenames[0], 'r')
			
         with f:
            data = f.read()
            self.contents.setText(data)
				
def main():
   app = QApplication(sys.argv)
   ex = filedialogdemo()
   ex.show()
   sys.exit(app.exec_())
	
if __name__ == '__main__':
   main()

Another Example

import sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
class CustomDialog(QFileDialog):

   def __init__(self, *args, **kwargs):
      super(CustomDialog, self).__init__(*args, **kwargs)
      
      self.setWindowTitle("HELLO!")

      QBtn = QDialogButtonBox.Ok | QDialogButtonBox.Cancel

      self.buttonBox = QDialogButtonBox(QBtn)
      self.buttonBox.accepted.connect(self.accept)
      self.buttonBox.rejected.connect(self.reject)

      self.layout = QVBoxLayout()
      self.layout.addWidget(self.buttonBox)
      self.setLayout(self.layout)

class filedialogdemo(QWidget):
   def __init__(self, parent = None):

      super(filedialogdemo, self).__init__(parent)

      layout = QVBoxLayout()

      self.btn1 = QPushButton("QFileDialog object")
      self.btn1.clicked.connect(self.getfiles)
      layout.addWidget(self.btn1)

      self.contents = QTextEdit()
      layout.addWidget(self.contents)
      self.setLayout(layout)
      self.setWindowTitle("File Dialog demo")

   def getfiles(self, s):
      print("click", s)
      dlg = CustomDialog(self)
      if dlg.exec_():
        filenames = dlg.selectedFiles()
        f = open(filenames[0], 'r')

        with f:
            data = f.read()
            self.contents.setText(data)
def main():

   app = QApplication(sys.argv)
   ex = filedialogdemo()
   ex.show()
   sys.exit(app.exec_())

if __name__ == '__main__':
   main()

QTab

Methods

addTab()
insertTab()
removeTab()
setCurrentIndex()
setCurrentWidget()
setTabBar()
setTabPosition()
setTabText()

Tab Position

QTabWidget.North above the pages
QTabWidget.South below the pages
QTabWidget.West to the left of the pages
QTabWidget.East to the right of the pages

Signals

currentChanged()
tabClosedRequested()

import sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *

class tabdemo(QTabWidget):
   def __init__(self, parent = None):
      super(tabdemo, self).__init__(parent)
      self.tab1 = QWidget()
      self.tab2 = QWidget()
      self.tab3 = QWidget()
		
      self.addTab(self.tab1,"Tab 1")
      self.addTab(self.tab2,"Tab 2")
      self.addTab(self.tab3,"Tab 3")
      self.tab1UI()
      self.tab2UI()
      self.tab3UI()
      self.setWindowTitle("tab demo")
		
   def tab1UI(self):
      layout = QFormLayout()
      layout.addRow("Name",QLineEdit())
      layout.addRow("Address",QLineEdit())
      self.setTabText(0,"Contact Details")
      self.tab1.setLayout(layout)
		
   def tab2UI(self):
      layout = QFormLayout()
      sex = QHBoxLayout()
      sex.addWidget(QRadioButton("Male"))
      sex.addWidget(QRadioButton("Female"))
      layout.addRow(QLabel("Sex"),sex)
      layout.addRow("Date of Birth",QLineEdit())
      self.setTabText(1,"Personal Details")
      self.tab2.setLayout(layout)
		
   def tab3UI(self):
      layout = QHBoxLayout()
      layout.addWidget(QLabel("subjects")) 
      layout.addWidget(QCheckBox("Physics"))
      layout.addWidget(QCheckBox("Maths"))
      self.setTabText(2,"Education Details")
      self.tab3.setLayout(layout)
		
def main():
   app = QApplication(sys.argv)
   ex = tabdemo()
   ex.show()
   sys.exit(app.exec_())
	
if __name__ == '__main__':
   main()

QStackedWidget

Methods

addWidget()

import sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *

class stackedExample(QWidget):
   def __init__(self):
        super(stackedExample, self).__init__()
        self.leftlist = QListWidget ()
        self.leftlist.insertItem (0, 'Contact' )
        self.leftlist.insertItem (1, 'Personal' )
        self.leftlist.insertItem (2, 'Educational' )

        self.stack1 = QWidget()
        self.stack2 = QWidget()
        self.stack3 = QWidget()

        self.stack1UI()
        self.stack2UI()
        self.stack3UI()

        self.Stack = QStackedWidget (self)
        self.Stack.addWidget (self.stack1)
        self.Stack.addWidget (self.stack2)
        self.Stack.addWidget (self.stack3)

        hbox = QHBoxLayout(self)
        hbox.addWidget(self.leftlist)
        hbox.addWidget(self.Stack)

        self.setLayout(hbox)
        self.leftlist.currentRowChanged.connect(self.display)
        self.setGeometry(300, 50, 10,10)
        self.setWindowTitle('StackedWidget demo')
        self.show()
		
   def stack1UI(self):
      layout = QFormLayout()
      layout.addRow("Name",QLineEdit())
      layout.addRow("Address",QLineEdit())
      #self.setTabText(0,"Contact Details")
      self.stack1.setLayout(layout)
		
   def stack2UI(self):
      layout = QFormLayout()
      sex = QHBoxLayout()
      sex.addWidget(QRadioButton("Male"))
      sex.addWidget(QRadioButton("Female"))
      layout.addRow(QLabel("Sex"),sex)
      layout.addRow("Date of Birth",QLineEdit())
		
      self.stack2.setLayout(layout)
		
   def stack3UI(self):
      layout = QHBoxLayout()
      layout.addWidget(QLabel("subjects"))
      layout.addWidget(QCheckBox("Physics"))
      layout.addWidget(QCheckBox("Maths"))
      self.stack3.setLayout(layout)
		
   def display(self,i):
      self.Stack.setCurrentIndex(i)
		
def main():
   app = QApplication(sys.argv)
   ex = stackedExample()
   sys.exit(app.exec_())
	
if __name__ == '__main__':
   main()

QSplitter

Methods

addWidget()
indexOf()
insertWidget()
setOrientation()
setSizes()
count()

import sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *

class Example(QWidget):
   def __init__(self):
    super(Example, self).__init__()
    self.initUI()
	
   def initUI(self):
      hbox = QHBoxLayout(self)
		
      topleft = QFrame()
      topleft.setFrameShape(QFrame.StyledPanel)
      bottom = QFrame()
      bottom.setFrameShape(QFrame.StyledPanel)
		
      splitter1 = QSplitter(Qt.Horizontal)
      textedit = QTextEdit()
      splitter1.addWidget(topleft)
      splitter1.addWidget(textedit)
      splitter1.setSizes([100,200])
		
      splitter2 = QSplitter(Qt.Vertical)
      splitter2.addWidget(splitter1)
      splitter2.addWidget(bottom)
		
      hbox.addWidget(splitter2)
		
      self.setLayout(hbox)
      QApplication.setStyle(QStyleFactory.create('Cleanlooks'))
		
      self.setGeometry(300, 300, 300, 200)
      self.setWindowTitle('QSplitter demo')
      self.show()
		
def main():
   app = QApplication(sys.argv)
   ex = Example()
   sys.exit(app.exec_())
	
if __name__ == '__main__':
   main()

QDockWidget

Methods

setWidget()
setFloating()

import sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *

class dockdemo(QMainWindow):
   def __init__(self, parent = None):
      super(dockdemo, self).__init__(parent)
		
      layout = QHBoxLayout()
      bar = self.menuBar()
      file = bar.addMenu("File")
      file.addAction("New")
      file.addAction("save")
      file.addAction("quit")
		
      self.items = QDockWidget("Dockable", self)
      self.listWidget = QListWidget()
      self.listWidget.addItem("item1")
      self.listWidget.addItem("item2")
      self.listWidget.addItem("item3")
		
      self.items.setWidget(self.listWidget)
      self.items.setFloating(False)
      self.setCentralWidget(QTextEdit())
      self.addDockWidget(Qt.RightDockWidgetArea, self.items)
      self.setLayout(layout)
      self.setWindowTitle("Dock demo")
		
def main():
   app = QApplication(sys.argv)
   ex = dockdemo()
   ex.show()
   sys.exit(app.exec_())
	
if __name__ == '__main__':
   main()

QStatusBar

Methods

addWidget()
addPermanentWidget()
showMessage()
clearMessage()
removeWidget()

import sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *

class statusdemo(QMainWindow):
   def __init__(self, parent = None):
      super(statusdemo, self).__init__(parent)
		
      bar = self.menuBar()
      file = bar.addMenu("File")
      file.addAction("show")
      file.addAction("add")
      file.addAction("remove")
      file.triggered[QAction].connect(self.processtrigger)
      self.setCentralWidget(QTextEdit())
		
      self.statusBar = QStatusBar()
      self.b = QPushButton("click here")
      self.setWindowTitle("QStatusBar Example")
      self.setStatusBar(self.statusBar)
		
   def processtrigger(self,q):
	
      if (q.text() == "show"):
         self.statusBar.showMessage(q.text()+" is clicked",2000)
			
      if q.text() == "add":
         self.statusBar.addWidget(self.b)
			
      if q.text() == "remove":
         self.statusBar.removeWidget(self.b)
         self.statusBar.show()
			
def main():
   app = QApplication(sys.argv)
   ex = statusdemo()
   ex.show()
   sys.exit(app.exec_())
	
if __name__ == '__main__':
   main()

QListWidget

Methods

addItem()
addItems()
insertItem()
clear()
setCurrentItem()
sortItems()

Signals

currentItemChanged()
itemClicked()

from PyQt5.QtGui import *
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *

import sys

class myListWidget(QListWidget):
   def Clicked(self,item):
      QMessageBox.information(self, "ListWidget", "You clicked: "+item.text())
		
def main():
   app = QApplication(sys.argv)
   listWidget = myListWidget()
	
   #Resize width and height
   listWidget.resize(300,120)
	
   listWidget.addItem("Item 1"); 
   listWidget.addItem("Item 2");
   listWidget.addItem("Item 3");
   listWidget.addItem("Item 4");
	
   listWidget.setWindowTitle('PyQT QListwidget Demo')
   listWidget.itemClicked.connect(listWidget.Clicked)
   
   listWidget.show()
   sys.exit(app.exec_())
	
if __name__ == '__main__':
   main()

QScrollbar

Control

slider
Two Scroll arrows
Page control
Scroll Bar

Methods

setMaximum()

Signals

valueChanged()
sliderMoved()

import sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *

class Example(QWidget):
   def __init__(self):
      super(Example, self).__init__()
      self.initUI()
		
   def initUI(self):
      vbox = QVBoxLayout(self)
    #   vbox.addLayout(self)
      self.setLayout(vbox)
      hbox = QHBoxLayout()
      self.l1 = QLabel("Drag scrollbar sliders to change color")
      self.l1.setFont(QFont("Arial",16))
		
      hbox.addWidget(self.l1)
      self.s1 = QScrollBar()
      self.s1.setMaximum(255)
		
      self.s1.sliderMoved.connect(self.sliderval)
      self.s2 = QScrollBar()
      self.s2.setMaximum(255)
      self.s2.sliderMoved.connect(self.sliderval)
		
      self.s3 = QScrollBar()
      self.s3.setMaximum(255)
      self.s3.sliderMoved.connect(self.sliderval)
		
      hbox.addWidget(self.s1)
      hbox.addWidget(self.s2)
      hbox.addWidget(self.s3)
		
      self.setGeometry(300, 300, 300, 200)
      self.setWindowTitle('QSplitter demo')
      self.show()
		
   def sliderval(self):
      print (self.s1.value(),self.s2.value(), self.s3.value())
      palette = QPalette()
      c = QColor(self.s1.value(),self.s2.value(), self.s3.value(),255)
      palette.setColor(QPalette.Foreground,c)
      self.l1.setPalette(palette)
		
def main():
   app = QApplication(sys.argv)
   ex = Example()
   sys.exit(app.exec_())
	
if __name__ == '__main__':
   main()

Calendar

import sys
import sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *

class Example(QWidget):
   def __init__(self):
      super(Example, self).__init__()
      self.initUI()
		
   def initUI(self):
      cal = QCalendarWidget(self)
      cal.setGridVisible(True)
      cal.move(20, 20)
      cal.clicked[QDate].connect(self.showDate)
		
      self.lbl = QLabel(self)
      date = cal.selectedDate()
      self.lbl.setText(date.toString())
      self.lbl.move(20, 200)
		
      self.setGeometry(100,100,300,300)
      self.setWindowTitle('Calendar')
      self.show()
		
   def showDate(self, date):
	
      self.lbl.setText(date.toString())
		
def main():

   app = QApplication(sys.argv)
   ex = Example()
   sys.exit(app.exec_())
	
if __name__ == '__main__':
   main()

QThread

Threading in PyQT


import sys
import time

from PyQt5.QtCore import (QCoreApplication, QObject, QRunnable, QThread,QThreadPool, pyqtSignal)

# Subclassing QThread
# http://qt-project.org/doc/latest/qthread.html
class AThread(QThread):

    def run(self):
        count = 0
        while count < 5:
            time.sleep(1)
            print("A Increasing")
            count += 1

# Subclassing QObject and using moveToThread
# http://blog.qt.digia.com/blog/2007/07/05/qthreads-no-longer-abstract
class SomeObject(QObject):

    finished = pyqtSignal()

    def long_running(self):
        count = 0
        while count < 5:
            time.sleep(1)
            print("B Increasing")
            count += 1
        self.finished.emit()

# Using a QRunnable
# http://qt-project.org/doc/latest/qthreadpool.html
# Note that a QRunnable isn't a subclass of QObject and therefore does
# not provide signals and slots.
class Runnable(QRunnable):

    def run(self):
        count = 0
        app = QCoreApplication.instance()
        while count < 5:
            print("C Increasing")
            time.sleep(1)
            count += 1
        app.quit()


def using_q_thread():
    app = QCoreApplication([])
    thread = AThread()
    thread.finished.connect(app.exit)
    thread.start()
    sys.exit(app.exec_())

def using_move_to_thread():
    app = QCoreApplication([])
    objThread = QThread()
    obj = SomeObject()
    obj.moveToThread(objThread)
    obj.finished.connect(objThread.quit)
    objThread.started.connect(obj.long_running)
    objThread.finished.connect(app.exit)
    objThread.start()
    sys.exit(app.exec_())

def using_q_runnable():
    app = QCoreApplication([])
    runnable = Runnable()
    QThreadPool.globalInstance().start(runnable)
    sys.exit(app.exec_())

if __name__ == "__main__":
    #using_q_thread()
    #using_move_to_thread()
    using_q_runnable()

Python - PyQt5

Install PyQt5

Convert .ui file to .py

QLabel

QLineEdit

QPushButton

QRadioButton

QCheckBox

QComboBox

QSpinBox

QSlider

QMenubar QMenu QAction

QToolBar

QInputDialog

QFontDialog

QFileDialog

QTab

QStackedWidget

QSplitter

QDockWidget

QStatusBar

QListWidget

QScrollbar

Calendar

QThread

See Also