[GUI in Python] PyQt5-Dialog-

Continuation of Last time

Dialogs I will summarize this site roughly in Japanese.

[Simple dialog display]

QInputDialog.py

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


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


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

        self.btn = QPushButton('Dialog', self)
        self.btn.move(20, 20)
        self.btn.clicked.connect(self.showDialog)
        
        self.le = QLineEdit(self)
        self.le.move(130, 22)
        
        self.setGeometry(300, 300, 290, 150)
        self.setWindowTitle('Input dialog')
        self.show()
        
        
    def showDialog(self):
        
        #Dialog display
        text, ok = QInputDialog.getText(self, '---Input Dialog---', 
            'Enter your name:')
        
        #Set the entered text to the le object
        if ok:
            self.le.setText(str(text))
        
        
if __name__ == '__main__':
    
    app = QApplication(sys.argv)
    ex = Example()
    sys.exit(app.exec_())

[Dialog display of color selection screen]

QColorDialog.py

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


import sys
from PyQt5.QtWidgets import (QWidget, QPushButton, QFrame, 
    QColorDialog, QApplication)
from PyQt5.QtGui import QColor


class Example(QWidget):
    
    def __init__(self):
        super().__init__()
        
        self.initUI()
        
        
    def initUI(self):      
        
        #Initial color setting (make it black)
        col = QColor(0, 0, 0) 

        self.btn = QPushButton('Dialog', self)
        self.btn.move(20, 20)

        self.btn.clicked.connect(self.showDialog)

        self.frm = QFrame(self)
        self.frm.setStyleSheet("QWidget { background-color: %s }" 
            % col.name())
        self.frm.setGeometry(130, 22, 100, 100)            
        
        self.setGeometry(300, 300, 250, 180)
        self.setWindowTitle('Color dialog')
        self.show()
        
        
    def showDialog(self):
      
        #Dialog display of color selection screen
        col = QColorDialog.getColor()

        #Display the selected color in the main window
        if col.isValid():
            self.frm.setStyleSheet("QWidget { background-color: %s }"
                % col.name())   
        
if __name__ == '__main__':
    
    app = QApplication(sys.argv)
    ex = Example()
    sys.exit(app.exec_())

[Dialog display of font selection screen]

QFontDialog.py

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


import sys
from PyQt5.QtWidgets import (QWidget, QVBoxLayout, QPushButton, 
    QSizePolicy, QLabel, QFontDialog, QApplication)


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

        vbox = QVBoxLayout()

        btn = QPushButton('Dialog', self)
        btn.setSizePolicy(QSizePolicy.Fixed,
            QSizePolicy.Fixed)
        
        btn.move(20, 20)

        vbox.addWidget(btn)

        btn.clicked.connect(self.showDialog)
        
        self.lbl = QLabel('Knowledge only matters', self)
        self.lbl.move(130, 20)

        vbox.addWidget(self.lbl)
        self.setLayout(vbox)          
        
        self.setGeometry(300, 300, 250, 180)
        self.setWindowTitle('Font dialog')
        self.show()
        
        
    def showDialog(self):

        #Set selected font to lbl object
        font, ok = QFontDialog.getFont()
        if ok:
            self.lbl.setFont(font)
        
        
if __name__ == '__main__':
    
    app = QApplication(sys.argv)
    ex = Example()
    sys.exit(app.exec_())

[File dialog display]

QFileDialog.py

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


import sys
from PyQt5.QtWidgets import (QMainWindow, QTextEdit, 
    QAction, QFileDialog, QApplication)
from PyQt5.QtGui import QIcon

#Inherit QMainWindow for text form-centric screen
class Example(QMainWindow):
    
    def __init__(self):
        super().__init__()
        
        self.initUI()
        
        
    def initUI(self):      

        self.textEdit = QTextEdit()
        self.setCentralWidget(self.textEdit)
        self.statusBar()

        #Menu bar icon settings
        openFile = QAction(QIcon('imoyokan.jpg'), 'Open', self)
        #Shortcut settings
        openFile.setShortcut('Ctrl+O')
        #Status bar settings
        openFile.setStatusTip('Open new File')
        openFile.triggered.connect(self.showDialog)

        #Create menu bar
        menubar = self.menuBar()
        fileMenu = menubar.addMenu('&File')
        fileMenu.addAction(openFile)       
        
        self.setGeometry(300, 300, 350, 300)
        self.setWindowTitle('File dialog')
        self.show()
        
        
    def showDialog(self):

        #The second argument is the title of the dialog and the third argument is the path to display
        fname = QFileDialog.getOpenFileName(self, 'Open file', '/home')

        # fname[0]Is the path of the selected file (including the file name)
        if fname[0]:
            #File reading
            f = open(fname[0], 'r')

            #Write file contents to a text editor
            with f:
                data = f.read()
                self.textEdit.setText(data)        
        
if __name__ == '__main__':
    
    app = QApplication(sys.argv)
    ex = Example()
    sys.exit(app.exec_())

Next time will try Widgets roughly.