Question

I am using pyQT 4.8.3 in order to create a proper GUI for a QGIS plugin

There are three widgets in the form

my_comboBox , my_lineEdit , my_spinBox

Assume that comboBox has three entries

'combo_first_item' , 'combo_second_item' , 'combo_third_item'

What exactly I want is;

if 'combo_second_item' is selected, then my_lineEdit toggles state to disabled
if 'combo_third_item' selected, then my_spinBox toggles state to disabled

So, how can I toggle enabled state of widgets in the form based on selected string (or index value) from the combobox?

What should be the proper signal -> slot assignment?
Unlike QbuttonBox, QcomboBox does not fire SetDisabled slot

Thanks.

Answer 1

Make a dictionary that maps the string to widget:

widgets = {'combo_first_item': my_comboBox,
           'combo_second_item': my_lineEdit,
           'combo_third_item': my_spinBox}

And a slot:

def disableWidget(currentIndex):
     widget = widgets[currentIndex]
     widget.setEnabled(False)
     # or anything else you want to do on the widget

Then you can connect the currentIndexChanged[QString] signal to this:

comboBox.currentIndexChanged['QString'].connect(disableWidget)

Alternatively you can use currentIndexChanged[int] and a list instead of a dictionary.

PS: If this is inside a class instance, put self accordingly.