pyqt5 qmessagebox information example

1import sys
2from PyQt4.QtGui import *
3from PyQt4.QtCore import *
4
5def window():
6   app = QApplication(sys.argv)
7   w = QWidget()
8   b = QPushButton(w)
9   b.setText("Show message!")
10
11   b.move(50,50)
12   b.clicked.connect(showdialog)
13   w.setWindowTitle("PyQt Dialog demo")
14   w.show()
15   sys.exit(app.exec_())
16	
17def showdialog():
18   msg = QMessageBox()
19   msg.setIcon(QMessageBox.Information)
20
21   msg.setText("This is a message box")
22   msg.setInformativeText("This is additional information")
23   msg.setWindowTitle("MessageBox demo")
24   msg.setDetailedText("The details are as follows:")
25   msg.setStandardButtons(QMessageBox.Ok | QMessageBox.Cancel)
26   msg.buttonClicked.connect(msgbtn)
27	
28   retval = msg.exec_()
29   print "value of pressed message box button:", retval
30	
31def msgbtn(i):
32   print "Button pressed is:",i.text()
33	
34if __name__ == '__main__': 
35   window()

1def open_database(self, filename=''):
2    """ This function opens a database and set this on the UI """
3 
4    # If not filename provide, then open dialog to select
5    if self.created:
6        QMessageBox.information(self,
7                                self.tr("Information"),
8                                self.tr("You may only have one database"
9                                        " open at time."))
10        DEBUG("Ya existe una base de datos abierta")
11        return
12    if not filename:
13        if self.__last_open_folder is None:
14            directory = os.path.expanduser("~")
15        else:
16            directory = self.__last_open_folder
17        filter_ = settings.SUPPORTED_FILES.split(';;')[0]
18        filename, _ = QFileDialog.getOpenFileName(self,
19                                                  self.tr("Open Database"),
20                                                  directory,
21                                                  filter_)
22        # If is canceled, return
23        if not filename:
24            return
25 
26        # Remember the folder
27        self.__last_open_folder = file_manager.get_path(filename)
28 
29    DEBUG("Abriendo la base de datos: '{}'".format(filename))
30 
31    # If filename provide
32    try:
33        # Read pdb file
34        pfile_object = pfile.File(filename)
35        db_data = pfile_object.read()
36        # Create a dict to manipulate data more easy
37        db_data = self.__sanitize_data(db_data)
38    except Exception as reason:
39        QMessageBox.information(self,
40                                self.tr("The file couldn't be open"),
41                                str(reason))
42        CRITICAL("Error al intentar abrir el archivo: {}".format(reason))
43        return
44 
45    # Create a database container widget
46    db_container = database_container.DatabaseContainer()
47 
48    try:
49        db_container.create_database(db_data)
50    except Exception as reason:
51        QMessageBox.information(self,
52                                self.tr("Error"),
53                                str(reason))
54        CRITICAL("Error al crear la base de datos: {}".format(reason))
55        return
56 
57    # Set the PFile object to the new database
58    db_container.pfile = pfile_object
59    # Add data base container to stacked
60    self.add_widget(db_container)
61    # Database name
62    db_name = file_manager.get_basename(filename)
63    # Update title with the new database name, and enable some actions
64    pireal = Pireal.get_service("pireal")
65    pireal.change_title(db_name)
66    pireal.set_enabled_db_actions(True)
67    pireal.set_enabled_relation_actions(True)
68    # Add to recent databases
69    self.recent_databases = filename
70    self.created = True
71