an update to my code, based on the reply of Israel Unterman:
The Error-Class is now
from PyQt5 import QtWidgets
from PyQt5.QtWidgets import QMainWindow
class Error(QtWidgets.QMainWindow):
reply = False
last_reply_id = None
last_id = 0
def __init__(self, error_code_string, parent=None):
super().__init__(parent)
QtWidgets.QMessageBox.warning(self, "Warnung", error_code_string, QtWidgets.QMessageBox.Ok)
id = give_id(self)
def give_id(self):
self.last_id += 1
return self.last_id
def give_reply(self):
if last_id == last_reply_id:
return self.reply
else:
return None
def set_reply(self, button, id):
if button in (QMessageBox.Ok, QMessageBox.Yes):
reply = True
else:
reply = False
self.last_reply_id = id
return reply
And the Test-Script comes with
from ErrorHandling import Error
Error('Test')
If I am using the normal Code (practically the same Code, just wrapped in a class) the message appears and then at the line
id = give_id(self)
the Code stops without any errormessage from python, just:
Process finished with exit code 1
If I use the test-script, there is nothing (No QMessageBox!) than this:
Process finished with exit code 1
If I debug the Code, init() gets the same Objects and variables, but
super().__init__(parent)
fails without any message. So where is the mistake, or difference.
Here a shortend Version of the Class (it's too long to show all code here), from which the "Error" works nearly fine:
from ErrorHandling import Error
class MainWindow(QWidget):
def __init__(self, parent=None):
super().__init__(parent)
# set some variables
self.create_layout()
def create_layout(self):
# creates a GUI using QWidgets with some Inputboxes and one button
[...]
def button_start_clicked(self):
Error('Check the input')
Here is the old question:
I have a problem regarding the setup of QtWidgets.QMessageBox. All Code follows the description.
The ErrorHandling-Modul should give a message about an error. If needed it may ask a question too. The function ErrorMsg.errorMessage is called from other Moduls in case of an catched exception. There will be more functions added.
If I run the code the following error occurs:
Connected to pydev debugger (build 145.1504)
Traceback (most recent call last):
File "C:\Program Files (x86)\JetBrains\PyCharm Community Edition 2016.1.4\helpers\pydev\pydevd.py", line 1531, in <module>
globals = debugger.run(setup['file'], None, None, is_module)
File "C:\Program Files (x86)\JetBrains\PyCharm Community Edition 2016.1.4\helpers\pydev\pydevd.py", line 938, in run
pydev_imports.execfile(file, globals, locals) # execute the script
File "C:\Program Files (x86)\JetBrains\PyCharm Community Edition 2016.1.4\helpers\pydev\_pydev_imps\_pydev_execfile.py", line 18, in execfile
exec(compile(contents+"\n", file, 'exec'), glob, loc)
File "C:/Quellcode/AllgTest.py", line 5, in <module>
reply = errm.errorMessage('Test')
File "C:/Quellcode\ErrorHandling.py", line 20, in errorMessage
msg_box.setIcon(QMessageBox.Warning)
TypeError: QMessageBox.setIcon(QMessageBox.Icon): first argument of unbound method must have type 'QMessageBox'
Process finished with exit code 1
I tried quite some variations and googled, but I have no idea what the problem is since I found some examples that are using the line QMessageBox.setIcon(QMessageBox.Icon) So where is my mistake?
And now the Code:
There is the following testscript to test my ErrorMsg-class
from ErrorHandling import ErrorMsg
errm = ErrorMsg()
reply = errm.errorMessage('Test')
And here is my ErrorHandling-Modul
from PyQt5.QtWidgets import QMessageBox
from PyQt5.QtWidgets import QMainWindow
class ErrorMsg(QMainWindow):
def __init__(self):
pass
def giveback(self,button):
if button in (QMessageBox.Ok, QMessageBox.Yes):
reply = True
else:
reply = False
return reply
def errorMessage(self, error_msg, buttons='OK'):
msg_box = QMessageBox
msg_box.setIcon(QMessageBox.Warning)
msg_box.setWindowTitle('Warning')
if buttons == 'OK':
msg_box.setStandardButtons(QMessageBox.Ok)
elif buttons == 'YesNo':
msg_box.setStandardButtons(QMessageBox.Yes | QMessageBox.No)
else:
error_msg = 'Unknown Button >' + buttons + '<, use >OK< or >YesNo<'
raise ValueError(error_msg)
msg_box.setText(error_msg)
clicked_button = msg_box.exec()
return giveback(clicked_button)
Thanks for your help
James
You didn't create an object of the message box. To create an object use:
msg_box = QMessageBox()
But you don'y need to go through all this, since QMessageBox has static functions for showing messages, which you can call directly on the QMessageBox class. For example:
QMessageBox.warning(None, 'title', 'msg')
You also have some control over the butons, see QMessageBox