[GUI with Python] PyQt5 -Widget II-

Last time continued

widgets Ⅱ I will summarize this site roughly in Japanese.

[Optimization of image display]

QPixmap.py

#!/usr/bin/python3
# -*- coding: utf-8 -*-


import sys
from PyQt5.QtWidgets import (QWidget, QHBoxLayout, 
    QLabel, QApplication)
from PyQt5.QtGui import QPixmap


class Example(QWidget):
    
    def __init__(self):
        super().__init__()
        
        self.initUI()
        
        
    def initUI(self):      

        hbox = QHBoxLayout(self)
        #Create QPixmap object
        pixmap = QPixmap("imoyokan.jpg ")

        #Make a label and put an image in it
        lbl = QLabel(self)
        lbl.setPixmap(pixmap)

        hbox.addWidget(lbl)
        self.setLayout(hbox)
        
        self.move(300, 200)
        self.setWindowTitle('Imoyokan')
        self.show()        
        
        
if __name__ == '__main__':
    
    app = QApplication(sys.argv)
    ex = Example()
    sys.exit(app.exec_())

[Display the entered text on the label]

QLineEdit.py

#!/usr/bin/python3
# -*- coding: utf-8 -*-


import sys
from PyQt5.QtWidgets import (QWidget, QLabel, 
    QLineEdit, QApplication)


class Example(QWidget):
    
    def __init__(self):
        super().__init__()
        
        self.initUI()
        
        
    def initUI(self):      

        #Label object creation
        self.lbl = QLabel(self)
        #QLineEdit object creation
        qle = QLineEdit(self)
        
        qle.move(60, 100)
        self.lbl.move(60, 40)

        #Call the onChanged function when a character is entered in qle
        qle.textChanged[str].connect(self.onChanged)
        
        self.setGeometry(300, 300, 280, 170)
        self.setWindowTitle('QLineEdit')
        self.show()
        
        
    def onChanged(self, text):
        
        #Insert the text entered on the label
        self.lbl.setText(text)
        #Adjust label length according to the text entered
        self.lbl.adjustSize()        
        
        
if __name__ == '__main__':
    
    app = QApplication(sys.argv)
    ex = Example()
    sys.exit(app.exec_())

[Change widget size by dragging]

QSplitter

#!/usr/bin/python3
# -*- coding: utf-8 -*-


import sys
from PyQt5.QtWidgets import (QWidget, QHBoxLayout, QFrame, 
    QSplitter, QStyleFactory, QApplication)
from PyQt5.QtCore import Qt


class Example(QWidget):
    
    def __init__(self):
        super().__init__()
        
        self.initUI()
        
        
    def initUI(self):      

        hbox = QHBoxLayout(self)

        #Creating a frame object
        topleft = QFrame(self)
        #Frame shape setting
        topleft.setFrameShape(QFrame.StyledPanel)
 
        topright = QFrame(self)
        topright.setFrameShape(QFrame.StyledPanel)

        bottom = QFrame(self)
        bottom.setFrameShape(QFrame.StyledPanel)

        #Create a horizontal QSplitter object and add a frame
        splitter1 = QSplitter(Qt.Horizontal)
        splitter1.addWidget(topleft)
        splitter1.addWidget(topright)

        # #Create a vertical QSplitter object and add a frame
        splitter2 = QSplitter(Qt.Vertical)
        splitter2.addWidget(splitter1)
        splitter2.addWidget(bottom)

        hbox.addWidget(splitter2)
        self.setLayout(hbox)
        
        self.setGeometry(300, 300, 300, 200)
        self.setWindowTitle('QSplitter')
        self.show()
        
        
    def onChanged(self, text):
        
        self.lbl.setText(text)
        self.lbl.adjustSize()        
        
        
if __name__ == '__main__':
    
    app = QApplication(sys.argv)
    ex = Example()
    sys.exit(app.exec_())

【combo box】

QComboBox.py

#!/usr/bin/python3
# -*- coding: utf-8 -*-


import sys
from PyQt5.QtWidgets import (QWidget, QLabel, 
    QComboBox, QApplication)


class Example(QWidget):
    
    def __init__(self):
        super().__init__()
        
        self.initUI()
        
        
    def initUI(self):      

        #Label creation, initial name to Ubuntu
        self.lbl = QLabel("Ubuntu", self)

        #Creating a QComboBox object
        combo = QComboBox(self)
        #Item naming
        combo.addItem("Ubuntu")
        combo.addItem("Mandriva")
        combo.addItem("Fedora")
        combo.addItem("Arch")
        combo.addItem("Gentoo")

        combo.move(50, 50)
        self.lbl.move(50, 150)

        #Call the onActivated function when an item is selected
        combo.activated[str].connect(self.onActivated)        
         
        self.setGeometry(300, 300, 300, 200)
        self.setWindowTitle('QComboBox')
        self.show()
        
        
    def onActivated(self, text):
        
        #Set the name of the selected item on the label
        self.lbl.setText(text)
        #Adjust label length
        self.lbl.adjustSize()  
        
                
if __name__ == '__main__':
    
    app = QApplication(sys.argv)
    ex = Example()
    sys.exit(app.exec_())

Next time will try Drag & drop roughly.