I need to generate a custom popup input window triggered by clicking a QPushButton in my app (via clicked). It needs to get several inputs from the user of different types and then return them to the calling function inside the main window app. I have found built in functions such as QInputDialog that can do this for single specific inputs, but I can't figure out how to do this in the case of a popup that asks for several inputs of different types at once (preferably in a window designed in Qt Designer). Does anyone know how to do this?
import sys
import os
from PyQt5.QtWidgets import QMainWindow, QApplication
from PyQt5 import uic
path = os.path.dirname(__file__) #uic paths from itself, not the active dir, so path needed
qtCreatorFile = "NAME.ui" #Ui file name, from QtDesigner
Ui_MainWindow, QtBaseClass = uic.loadUiType(path + qtCreatorFile) #process through pyuic
class MyApp(QMainWindow, Ui_MainWindow): #gui class
def __init__(self):
#Set up the gui via Qt
super(MyApp, self).__init__()
self.ui = Ui_MainWindow()
self.ui.setupUi(self)
self.ui.add_button.clicked.connect(self.add_row) #add_button is QPushButton
def add_row(self):
data1, data2, data3 = #popup form to get data (types are not the same)
#do stuff with data
pass
#start app
if __name__ == "__main__":
app = QApplication(sys.argv) #instantiate a QtGui (holder for the app)
window = MyApp()
window.show()
sys.exit(app.exec_())
There is no single solution but I will give you a guide to do what you want.
If you want to get a widget with the behavior of QInputDialog you must first choose the right template, in this case a good option is Dialog with Buttons Bottom or Dialog with Buttons Right, add the components you want, position it, etc.
Then as you show your code you create a class that inherits from QDialog and then create a method where you get the results but to do so do not use show() but exec_()
path = os.path.dirname(__file__)
qtCreatorFile = "some_dialog.ui"
Ui_Dialog, _ = uic.loadUiType(os.path.join(path,qtCreatorFile))
class CustomDialog(QDialog, Ui_Dialog):
def __init__(self):
super(CustomDialog, self).__init__()
self.setupUi(self)
# set initials values to widgets
def getResults(self):
if self.exec_() == QDialog.Accepted:
# get all values
val = self.some_widget.some_function()
val2 = self.some_widget2.some_another_function()
return val1, val2, ...
else:
return None
And then use it in your function:
class MyApp(QMainWindow, Ui_MainWindow): #gui class
def __init__(self):
#Set up the gui via Qt
super(MyApp, self).__init__()
self.setupUi(self)
self.add_button.clicked.connect(self.add_row) #add_button is QPushButton
def add_row(self):
w = CustomDialog()
values = w.getResults()
if values:
data1, data2, data3 = values
Related
Before writing the Python code, I already made a ui file to made QT designer. The UI file has one Qlabel containing the values. To output an external value, I've tried, but I never could never make it. This is the My QtCode
import sys
from PyQt5.QtWidgets import *
from PyQt5 import uic
form_class = uic.loadUiType("untitled.ui")[0]
class WindowClass(QMainWindow, form_class) :
def __init__(self) :
super().__init__()
self.setupUi(self)
self.InitUI()
def InitUI(self, name):
self.hello.setText("Hello. %s"%name)
if __name__ == "__main__" :
app = QApplication(sys.argv)
myWindow = WindowClass()
myWindow.show()
app.exec_()
I want to accept the name value in if__name__=="main_" and hand it over to the part that outputs the label of the Qt class. I am not that good at English.
What I can't do
I'm not able to send data back from a child to a parent window.
What I have
I've got a complex GUI with several windows sendÃng data to child windows. Each window represents a unique Python-script in the same directory. There was no need to explicitely specify parents and childs, as the communication was always unidirectional (parent to child). However, now I need to send back data from childs to parents and can't figure out how to do this as each window (i.e. each class) has its own file.
Example
Here's a minimal example showing the base of what I want to accomplish.
What it does: win01 opens win02 and win02 triggers func in win01.
# testfile01.py
import sys
from PyQt5.QtWidgets import *
import testfile02 as t02
class win01(QWidget):
def __init__(self, parent=None):
super(win01, self).__init__(parent)
self.win02 = t02.win02()
self.button = QPushButton("open win02", self)
self.button.move(100, 100)
self.button.clicked.connect(self.show_t02)
def initUI(self):
self.center
def show_t02(self):
self.win02.show()
def func(self):
print("yes!")
if __name__ == '__main__':
app = QApplication(sys.argv)
ex = win01()
ex.show()
sys.exit(app.exec_())
##########################################################################
# testfile02.py
from PyQt5.QtWidgets import *
import testfile01 as t01
class win02(QWidget):
def __init__(self, parent=None):
super(win02, self).__init__(parent)
self.win01 = t01.win01()
self.button = QPushButton()
self.button.clicked.connect(self.win01.func)
def initUI(self):
self.center()
What I tried
Importing testfile01 in the second window always leads to the error:
RecursionError: maximum recursion depth exceeded.
Then, I tried the following approaches, but they didn't work either:
Not importing testfile01 in win02 and adjusting parent=None to different other objects
Importing testfile01 within the __init__ call of win02
Creating a signal in win02 to trigger func in win01
The Question
Is there a solution how to properly trigger func in win01 from win02?
Why are you getting RecursionError: maximum recursion depth exceeded?
You are getting it because you have a circular import that generates an infinite loop, in testfile01 you are importing the file testfile02, and in testfile02 you are importing testfile01, .... So that is a shows of a bad design.
Qt offers the mechanism of signals for objects to communicate information to other objects, and this has the advantage of non-dependence between classes that is a great long-term benefit (as for example that avoids circular import), so for that reason I think it is the most appropriate.
For this I will create the clicked signal in the class win02 that will be triggered by the clicked signal of the button, and make that clicked signal call the func:
testfile01.py
import sys
from PyQt5.QtWidgets import QWidget, QPushButton, QApplication
import testfile02 as t02
class win01(QWidget):
def __init__(self, parent=None):
super(win01, self).__init__(parent)
self.win02 = t02.win02()
self.win02.clicked.connect(self.func)
self.button = QPushButton("open win02", self)
self.button.move(100, 100)
self.button.clicked.connect(self.show_t02)
def show_t02(self):
self.win02.show()
def func(self):
print("yes!")
if __name__ == "__main__":
app = QApplication(sys.argv)
ex = win01()
ex.show()
sys.exit(app.exec_())
testfile02.py
from PyQt5.QtCore import pyqtSignal
from PyQt5.QtWidgets import QWidget, QPushButton, QVBoxLayout
class win02(QWidget):
clicked = pyqtSignal()
def __init__(self, parent=None):
super(win02, self).__init__(parent)
self.button = QPushButton("call to func")
self.button.clicked.connect(self.clicked)
lay = QVBoxLayout(self)
lay.addWidget(self.button)
I recommend you read:
https://doc.qt.io/qt-5/signalsandslots.html
Both the Widgets are independent and have no link in between.
Set win01 parent of win02.
In class win01
Replace :
self.win01 = t02.win02()
#and
self.win02.show()
with:
self.win01 = t02.win02(self)
#and
self.win01.show()
and in class win02
Replace:
self.win02 = t01.win01()
#and
self.button.clicked.connect(self.win01.func)
with:
self.win02 = self.parent()
#and
self.button.clicked.connect(self.win02.func)
I am creating a small GUI program using PySide. I am having difficulty creating another object of same class. What exactly I am trying to do is that when clicked on a button on MainWindow it should create another independent window of same class.
import sys
from PySide import QtCore, QtGui
class Sticky(QtGui.QMainWindow):
def __init__(self,parent = None):
QtGui.QMainWindow.__init__(self,parent)
self.initUI()
def initUI(self):
....
self.addToolBarElements()
....
self.show()
def addToolBarElements(self):
....
self.newwindow = QtGui.QAction(QtGui.QIcon(os.path.join(os.path.dirname(__file__),'icons/new.png')),"New Note",self)
self.newwindow.setStatusTip("New")
self.newwindow.triggered.connect(newwindow)
self.toolBar.addAction(self.newwindow)
def newwindow(self):
#how to create new object of same class
def run():
app = QtGui.QApplication(sys.argv)
notes = Sticky()
sys.exit(app.exec_())
Here is what I have tried:
I have tried multiprocessing but I didn't understand much. I tried calling run() method again but it gives error.
Do not call with the same name 2 different elements, in your case self.newwindow refers to the QAction as the method of the class, avoid it, that is a type of error easy to commit but difficult to find.
going to the point, you just have to create a new object of the class, but the problem is that the garbage collector will eliminate it, to avoid it there are 2 possible options, the first is to make the new window member of the class, or second store it in a list, that's the one I choose because I think you want to have several windows.
import sys
import os
from PySide import QtCore, QtGui
class Sticky(QtGui.QMainWindow):
def __init__(self,parent = None):
QtGui.QMainWindow.__init__(self,parent)
self.others_windows = []
self.initUI()
def initUI(self):
self.addToolBarElements()
self.show()
def addToolBarElements(self):
self.toolBar = self.addToolBar("toolBar")
self.newwindow = QtGui.QAction(QtGui.QIcon(os.path.join(os.path.dirname(__file__),'icons/new.png')), "New Note",self)
self.newwindow.setStatusTip("New")
self.newwindow.triggered.connect(self.on_newwindow)
self.toolBar.addAction(self.newwindow)
def on_newwindow(self):
w = Sticky()
w.show()
self.others_windows.append(w)
def run():
app = QtGui.QApplication(sys.argv)
notes = Sticky()
sys.exit(app.exec_())
run()
I want to add startup window that when I click button, it will open another window and close current window. For each window, it has seperated UI which created from Qt Designer in .ui form.
I load both .ui file via uic.loadUiType(). The first window(first UI) can normally show its UI but when I click button to go to another window, another UI (second UI) doesn't work. It likes open blank window.
Another problem is if I load first UI and then change to second UI (delete that Class and change to another Class, also delete uic.loadUiType()), the second UI still doesn't work (show blank window)
Please help... I research before create this question but can't find the answer.
Here's my code. How can I fix it?
import sys
from PyQt5.QtWidgets import QApplication, QWidget
from PyQt5.QtGui import QIcon
from PyQt5 import uic
#load both ui file
uifile_1 = 'UI/openPage.ui'
form_1, base_1 = uic.loadUiType(uifile_1)
uifile_2 = 'UI/mainPage.ui'
form_2, base_2 = uic.loadUiType(uifile_2)
class Example(base_1, form_1):
def __init__(self):
super(base_1,self).__init__()
self.setupUi(self)
self.startButton.clicked.connect(self.change)
def change(self):
self.main = MainPage()
self.main.show()
class MainPage(base_2, form_2):
def __int__(self):
super(base_2, self).__init__()
self.setupUi(self)
if __name__ == '__main__':
app = QApplication(sys.argv)
ex = Example()
ex.show()
sys.exit(app.exec_())
First you have an error, you must change __int__ to __init__. To close the window call the close() method.
import sys
from PyQt5.QtWidgets import QApplication, QWidget
from PyQt5.QtGui import QIcon
from PyQt5 import uic
#load both ui file
uifile_1 = 'UI/openPage.ui'
form_1, base_1 = uic.loadUiType(uifile_1)
uifile_2 = 'UI/mainPage.ui'
form_2, base_2 = uic.loadUiType(uifile_2)
class Example(base_1, form_1):
def __init__(self):
super(base_1,self).__init__()
self.setupUi(self)
self.startButton.clicked.connect(self.change)
def change(self):
self.main = MainPage()
self.main.show()
self.close()
class MainPage(base_2, form_2):
def __init__(self):
super(base_2, self).__init__()
self.setupUi(self)
if __name__ == '__main__':
app = QApplication(sys.argv)
ex = Example()
ex.show()
sys.exit(app.exec_())
I've created an app which has an main window and the possibility to open an dialog (question, error and so on). I'm not using QMessageBox.warning() or QMessageBox.question() and so on because I wanted to customize the dialogs a bit.
But every time I open a new Dialog, in the Windows task bar (I'm working on Windows 10) a new 'tab' is opened, which is a little bit annoying.
My code (shortened):
from PySide import QtCore, QtGui
import sys
class MessageBox:
def __init__(self, title, message):
msg = QtGui.QMessageBox()
flags = QtCore.Qt.Dialog
flags |= QtCore.Qt.CustomizeWindowHint
flags |= QtCore.Qt.WindowTitleHint
msg.setWindowFlags(flags)
msg.setWindowTitle(title)
msg.setText(message)
msg.exec_()
class MainWindow(QtGui.QMainWindow):
def __init__(self):
super(MainWindow, self).__init__()
self.show()
MessageBox("Title", "My message here")
if __name__ == "__main__":
app = QtGui.QApplication([])
window = MainWindow()
sys.exit(app.exec_())
Note: Normally, the dialog is called from an menu or button.
Question: How can I make the dialog appear in the main window without creating a new 'task bar tab'?
The solution was quite simple: Passing an reference of QMainWindow to the constructor of QDialog will do the job, e.g:
class MessageBox(QtGui.QDialog):
def __init__(self, parent, title, message, icon="info"):
super(MessageBox, self).__init__(parent)
...
and then calling the dialog from an class that inherits from QMainWindow:
class MainWindow(QtGui.QMainWindow):
def __init__(self):
super(MainWindow, self).__init__()
#connect button with function, e.g.:
mybutton.clicked.connect(self.open_dialog)
def open_dialog(self):
MessageBox(self)
Maybe this helps anyone!
If you set the parent of the QDialog to the window, it will only show as one item on the task bar. This is generally the first argument to QMessageBox.
class MessageBox:
def __init__(self, parent, title, message):
msg = QtGui.QMessageBox(parent)
Also, if you really want to create a custom dialog, you might as well just subclass from QDialog.