Drag n Drop Button and Drop-down menu PyQt/Qt designer

Question

I would like to know the \"best practice\" to change the behavior of some buttons to do the following:

I want with a click to appear a menu. Or when you drag this sa

Answer 1

In order to add code to a UI generated with QtDesigner, you must generate a .py file using pyuic:

pyuic myform.ui -o ui_myform.py

This ui_myform.py file, contains generated code that you should not edit, so later you can change your .ui file with QtDesigner, re-run pyuic, and get ui_myform.py updated without loosing any work.

The generated file will have a class Ui_myForm(object) (named after on your main widget's name), with a def setupUi(self, myForm) method inside. One way this can be used, is by creating your own class MyForm (on a separate file) which will inherit Ui_myForm, and some other Qt Class, like QWidget or QDialog:

myform.py:

from ui_myform import Ui_myForm
from PyQt4.QtGui import QDialog

class MyForm(QDialog, Ui_myForm):

    def __init__(self, parent = None):
        QDialog.__init__(self, parent)

        self.setupUi(self)    #here Ui_myForm creates all widgets as members 
                              #of this object.
                              #now you can access every widget defined in 
                              #myForm as attributes of self   

        #supposing you defined two pushbuttons on your .UI file:
        self.pushButtonB.setEnabled(False)

        #you can connect signals of the generated widgets
        self.pushButtonA.clicked.connect(self.pushButtonAClicked)



    def bucar_actualizaciones(self):
        self.pushButtonB.setEnabled(True)

The names of the widgets are the one you set on QtDesigner, but is easy to inspect ui_myform.py in order to see the available widgets and names.

In order to use a custom widget in QtDesigner, you can right-click the button, and go to Promote to.... There you'l have to enter:

• Base class name: QPushButton for example
• Promoted class name: MyPushButton (this must be the name of the class of your custom widget)
• Header file: mypushbutton.h. This will be converted to .py by pyuic.

Click Add and then Promote.

When you run pyuic, it will add this line at the end of ui_myform.py

from mypushbutton import MyPushButton

Also, you'll see that the generated code used MyPushButton instead of QPushButton