I'm creating a PyQt5 application in which I want to put some of QLineEdit widgets inside a QGroupBox.
When I run my application, GroupBox is visible and LineEdit is not.
In CreateLinesEdit() I commented a line which sets the line edit visible, but it opens lineEdit in a new window.
from PyQt5.QtWidgets import QGroupBox, QApplication, QLineEdit, QVBoxLayout, QWidget, QHBoxLayout
import sys
class Window(QWidget):
def __init__(self):
super().__init__()
self.InitWindow()
def InitWindow(self):
self.BoxLayout()
self.AddBox()
self.CreateLinesEdit()
self.show()
def BoxLayout(self):
self.groupBoxScreen = QGroupBox()
self.vbox = QVBoxLayout()
self.vbox_screenGame = QVBoxLayout()
self.hbox_lineEdit = QHBoxLayout()
def AddBox(self):
self.vbox_screenGame.addItem(self.hbox_lineEdit)
self.groupBoxScreen.setLayout(self.vbox_screenGame)
self.vbox.addWidget(self.groupBoxScreen)
self.setLayout(self.vbox)
def CreateLinesEdit(self):
self.lines_edit = []
for i in range(0, 4):
LineEdit = QLineEdit()
# LineEdit.setVisible(True)
self.lines_edit.append(LineEdit)
self.hbox_lineEdit.addWidget(self.lines_edit[i])
if __name__ == "__main__":
App = QApplication(sys.argv)
window = Window()
sys.exit(App.exec())
Related
Force repainting does not repaint PyQt5 widget (Qlabel, QTextEdit, even QProgressBar and etc)
Tested platforms: Linux, MacOS
PyQt5 version: 5.15.7
Installed from pip
As example I created simple app that updating text in QLabel widget in for loop. Force repainting doesnt working
import sys
from time import sleep
from PyQt5.QtWidgets import (QWidget, QApplication, QPushButton, QLabel)
class Example(QWidget):
def __init__(self):
super().__init__()
self.text = QLabel('Test', self)
self.text.move(10, 10)
self.text.resize(60,20)
self.button = QPushButton('Run', self)
self.button.move(17,40)
self.button.clicked.connect(self.some_activity)
self.setGeometry(300, 300, 100, 80)
self.show()
def some_activity(self):
for i in range(100):
text = f'i = {i}'
self.text.setText(text)
# self.text.update() -> Nothing happens (it shouldnt: https://doc.qt.io/qt-5/qwidget.html#update)
self.text.repaint() # -> Nothing happens
self.repaint() # -> Nothing happens
print(f'Text updated: {text}')
sleep(0.03)
if __name__ == '__main__':
app = QApplication(sys.argv)
ex = Example()
sys.exit(app.exec_())
Video demonstration: link
Just needed to use QThread to use for loop in my program
Thanks #musicamante for helping.
import sys
from time import sleep
from PyQt5 import QtCore
from PyQt5.QtWidgets import (QWidget, QApplication, QPushButton, QLabel)
class Thread(QtCore.QThread):
signal = QtCore.pyqtSignal(str)
def __init__(self, parent=None): QtCore.QThread.__init__(self, parent)
def run(self):
for i in range(100):
text = f'i = {i}'
print(f'Text updated: {text}')
self.signal.emit(text)
sleep(.3)
class Example(QWidget):
def __init__(self):
super().__init__()
self.text = QLabel('Test', self)
self.text.move(10, 10)
self.text.resize(60,20)
self.thread = Thread()
self.thread.signal.connect(self.signal, QtCore.Qt.QueuedConnection)
self.button = QPushButton('Run', self)
self.button.move(17,40)
self.button.clicked.connect(self.thread.start)
self.setGeometry(300, 300, 100, 80)
self.show()
def signal(self, text): self.text.setText(text)
if __name__ == '__main__':
app = QApplication(sys.argv)
ex = Example()
sys.exit(app.exec_())
so I'm currently working on a little project but I have an issue and all what I've tried did not work. I have 2 files :
Page1test :
from PyQt5 import QtWidgets
from PyQt5.QtWidgets import QPushButton, QWidget, QLabel
import sys
from page2test import Page2
class Page1(QWidget):
def __init__(self):
super(Page1, self).__init__()
self.setWindowTitle("Page 1")
label1 = QLabel(self)
label1.setText("\n PAGE 1")
self.btn_inMyApp = QPushButton ('Next page', self)
self.btn_inMyApp.setGeometry(1500,800,275,125)
self.btn_inMyApp.clicked.connect(self.closePage1_OpenPage2)
self.show()
def closePage1_OpenPage2(self):
self.Open = Page2()
self.Open.showMaximized()
self.close()
if __name__ == "__main__":
app = QtWidgets.QApplication(sys.argv)
window = Page1()
window.showMaximized()
sys.exit(app.exec_())
And page2test :
from PyQt5.QtWidgets import QPushButton, QWidget, QLabel
from Page1test import Page1
class Page2(QWidget):
def __init__(self):
super(Page2, self).__init__()
self.setWindowTitle("Test window principale")
label1 = QLabel(self)
label1.setText("\n Page2")
self.btn_inMyApp = QPushButton ('previous Page', self)
self.btn_inMyApp.setGeometry(1500,800,275,125)
self.btn_inMyApp.clicked.connect(self.closePage2_OpenPage1)
self.show()
def closePage2_OpenPage1(self):
self.Open = Page1()
self.Open.showMaximized()
self.close()
I run the code of Page1test : empty window with just a Qpushbutton "Next Page", goal : we click on it and it open Page 2 (and close Page 1). And, when we are in Page 2, we have A Qpushbutton with "Previous Page" and when we click on it, it opens page 1, and close Page 2. Like a loop.
But, when I run the code, it returns an error :
cannot import name 'Page2' from partially initialized module 'page2test' (most likely due to a circular import)
and I have no idea how to fix it...
If someone had an idea, it would be really helpful.
So, I've finally found the solution, that was not so difficult in the end. Here it is (if it can help someone) :
Instead of making 2 files, I've done just 1 file. Here is the code :
from PyQt5 import QtWidgets
from PyQt5.QtWidgets import QPushButton, QWidget, QLabel, QMainWindow
import sys
class MyApp(QWidget):
def __init__(self):
super(MyApp, self).__init__()
self.setWindowTitle("Page 1")
label1 = QLabel(self)
label1.setText("\n PAGE 1")
self.btn_inMyApp = QPushButton ('Page suivante', self)
self.btn_inMyApp.setGeometry(1500,800,275,125)
self.btn_inMyApp.clicked.connect(self.closePage1_OpenPage2)
self.show()
def btn1_onClicked(self):
pass
def closePage1_OpenPage2(self):
self.Open = NewApp()
self.Open.showMaximized()
self.close()
class NewApp(QMainWindow):
def __init__(self):
super(NewApp, self).__init__()
self.setWindowTitle("Test window principale")
label1 = QLabel(self)
label1.setText("\n Page2")
self.btn_inMyApp = QPushButton ('previous Page', self)
self.btn_inMyApp.setGeometry(1500,800,275,125)
self.btn_inMyApp.clicked.connect(self.closePage2_OpenPage1)
self.show()
def closePage2_OpenPage1(self):
self.Open = MyApp()
self.Open.showMaximized()
self.close()
if __name__ == "__main__":
app = QtWidgets.QApplication(sys.argv)
window = MyApp()
window.showMaximized()
sys.exit(app.exec_())
```
I can pass values between two windows using signal,
and I want the plain text change, while I press a button from another window.
but the insertPlainText and even text.show() are not working
I've tried sending the signal to the init part of the Mainwindow,
tried update, repaint, but none of them works.
appreciate for any of your help, thanks!
the search_send method in class SearchWindow to MainWindow method test_
class MainWindow(QtWidgets.QMainWindow):
def __init__(self):
super(MainWindow, self).__init__()
self.ui = Ui_Dialog()
self.ui.setupUi(self)
self.ui.tag_box.hide()
def test_(self, i): # -------problem here------------------
print(i) // <- value here were right
self.ui.tag_box.insertPlainText(i) # -------Plain Text does not change-------
self.ui.tag_box.show()# -------Plain Text does not show either--------------
class SearchWindow(QtWidgets.QMainWindow):
signal=pyqtSignal(str)
def __init__(self, endpoint=None, user=None, password=None, points_link=None):
super(SearchWindow, self).__init__()
self.ui = Ui_Search()
self.ui.setupUi(self)
self.ui.pushButton_2.clicked.connect(self.search_send)
def search_send(self): # -------problem here------------------
tag_list = [tag1,tag2, tag3]
otherClass = MainWindow()
self.signal.connect(otherClass.test_)
for k in tag_list:
self.signal.emit(k)
if __name__ == '__main__':
app = QtWidgets.QApplication([])
window = MainWindow()
window.show()
sys.exit(app.exec_())
As we're unclear what Ui_Dialog contains, I can't tell what's wrong exactly, but can show you how Signal should be used.
This is example of Signal that's transferring text to Slot. Name may differ in PyQt5 - change accordingly.
from PySide2.QtWidgets import QWidget, QApplication, QPlainTextEdit, QTextEdit, QVBoxLayout
from PySide2.QtCore import Signal, Slot
import sys
class MainWindow(QWidget):
sig = Signal(str)
def __init__(self):
super(MainWindow, self).__init__()
self.setWindowTitle("Main")
self.layout = QVBoxLayout()
self.text = QTextEdit()
self.layout.addWidget(self.text)
self.setLayout(self.layout)
self.text.textChanged.connect(self.onChange)
def onChange(self):
self.sig.emit(self.text.toPlainText())
class SubWindow(QWidget):
def __init__(self, connect_target: MainWindow):
super(SubWindow, self).__init__()
self.setWindowTitle("Sub")
self.layout = QVBoxLayout()
self.text = QPlainTextEdit()
self.layout.addWidget(self.text)
self.setLayout(self.layout)
connect_target.sig.connect(self.onSignal)
#Slot(str)
def onSignal(self, text):
self.text.insertPlainText(text + '\r\n')
if __name__ == '__main__':
app = QApplication(sys.argv)
window = MainWindow()
window.show()
window_sub = SubWindow(window)
window_sub.show()
sys.exit(app.exec_())
Anything inside Main will be inserted to QPlainTextEdit as you wanted.
I am trying to keep window by a Pin button. Here is the code:
import sys
from PyQt5.QtWidgets import QApplication, QWidget, QVBoxLayout, QPushButton, QPushButton
from PyQt5 import QtCore
class App(QWidget):
def __init__(self):
super().__init__()
self.title = 'Keep Going'
self.width = 480
self.height = 360
self.initUI()
def initUI(self):
self.setWindowTitle(self.title)
self.setFixedSize(self.width, self.height)
self.layout = QVBoxLayout()
self.button = QPushButton('PinTop')
self.button.setCheckable(True)
self.button.clicked.connect(self.winPinTop)
self.layout.addWidget(self.button)
# add tabs to widget
self.setLayout(self.layout)
self.show()
def winPinTop(self):
print('Pin')
button = self.sender()
if button.isChecked():
print('on top')
self.setWindowFlags(QtCore.Qt.WindowStaysOnTopHint)
self.show()
else:
print('no top')
self.setWindowFlags(self.windowFlags())
self.show()
if __name__ == '__main__':
app = QApplication(sys.argv)
ex = App()
sys.exit(app.exec_())
The window can not keep on top after clicking the button. I don't know how to fix this.
Infomation may help:
Python 3.6.8
PyQt version: 5.13.0
Ubuntu 19.04
UPDATE
I replace QWidget with QMainWindow class to check this bug.
import sys
from PyQt5.QtWidgets import QMainWindow,QApplication, QWidget, QVBoxLayout, QPushButton, QPushButton
from PyQt5 import QtCore
class App(QMainWindow):
def __init__(self):
super().__init__()
self.title = 'Keep Going'
self.width = 480
self.height = 360
self.initUI()
def initUI(self):
self.setWindowTitle(self.title)
win = QWidget()
win.setFixedSize(self.width, self.height)
layout = QVBoxLayout()
button = QPushButton('PinTop')
button.setCheckable(True)
button.clicked.connect(self.winPinTop)
layout.addWidget(button)
# add tabs to widget
win.setLayout(layout)
self.setCentralWidget(win)
self.show()
def winPinTop(self):
print('Pin')
button = self.sender()
if button.isChecked():
print('on top')
self.setWindowFlags(QtCore.Qt.WindowStaysOnTopHint | QtCore.Qt.Dialog )
print(self.windowFlags())
self.show()
else:
print('no top')
self.setWindowFlags(self.windowFlags() & ~QtCore.Qt.WindowStaysOnTopHint )
print(self.windowFlags())
self.show()
if __name__ == '__main__':
app = QApplication(sys.argv)
ex = App()
sys.exit(app.exec_())
The problem is still here.
UPDATE 2019-9-11
After remove the show function. I can get the window on top.
def winPinTop(self):
print('Pin')
button = self.sender()
if button.isChecked():
print('on top')
self.setWindowFlags(QtCore.Qt.WindowStaysOnTopHint | QtCore.Qt.Dialog )
print(self.windowFlags())
#self.show()
else:
print('no top')
self.setWindowFlags(self.windowFlags() & ~QtCore.Qt.WindowStaysOnTopHint )
print(self.windowFlags())
#self.show()
But the window will close after I click the pin button. When I show this window, it stays on the top.
I don't know why this happened.
Reference: PyQt: Always on top
I'm trying to create a simple UI that has the functionality to close when I use the shortcut Ctrl+Q or when I use the Exit into the File menu, to make it clearer I've created a fairly simple UI that goes with the code:
import sys
from PyQt5.QtWidgets import QApplication, QMainWindow, QAction, qApp
class MGen(QMainWindow):
def __init__(self):
super().__init__()
self.init_ui()
def init_ui(self):
exit_action = QAction('Exit', self)
exit_action.setShortcut('Ctrl+Q')
exit_action.triggered.connect(qApp.quit)
menu_bar = self.menuBar()
file_menu = menu_bar.addMenu('&File')
file_menu.addAction(exit_action)
self.setGeometry(0, 0, 500, 500)
self.setWindowTitle('MGen')
self.show()
if __name__ == '__main__':
app = QApplication(sys.argv)
mgen = MGen()
sys.exit(app.exec_())
Could anyone point what I'm doing wrong?