[PySide] QComboBox - rect of actual menu vs widget area

[Frank Rueter | OHUfx]

Here is the basic functional code (to have a QComboBox with integrated 
buy bar):

class TaskWidget(QtWidgets.QComboBox):
     """combo box with simple bar animation to indicate that the items 
are not ready yet"""

     def __init__(self, parent=None):
         super(TaskWidget, self).__init__(parent)
         self.counter = 0
         self.position = 0
         self.indicator_width = 20
         self.finished = False
         self.start_anim()

     def start_anim(self):
         self.timer_id = self.startTimer(50)

     def stop_anim(self):
         self.finished = not self.finished
         self.killTimer(self.timer_id)

     def timerEvent(self, event):
         if not self.finished:
             self.counter += .2
             self.position = ((math.sin(self.counter) + 1) * .5) * 
(self.width() - self.indicator_width)
             self.update()

     def paintEvent(self, event):
         super(TaskWidget, self).paintEvent(event)
         painter = QtGui.QPainter()
         painter.begin(self)
         indicator = QtCore.QRect(self.position,0,self.indicator_width, 
event.rect().height())
         painter.fillRect(indicator, QtCore.Qt.gray)
         painter.end()


On 23/12/18 10:03 PM, Frank Rueter | OHUfx wrote:
> Hi,
>
> I am trying to draw a simple busy indicator into a QCombobox while 
> it's being populated with items.
> I thought I'd use with a custom paint event that checks is a certain 
> condition is true, and if so it will draw custom stuff in to the menu, 
> otherwise it just does it's default thing and draw the items as usual.
> This is the bit I started with:
>
> class TaskWidget(QtWidgets.QComboBox):
>     def __init__(self, parent=None):
>         super(TaskWidget, self).__init__(parent)
>
>     def paintEvent(self, event):
>         super(TaskWidget, self).paintEvent(event)
>         painter = QtGui.QPainter()
>         painter.begin(self)
>         indicator = QtCore.QRect(0,0,5, event.rect().height())
>         painter.fillRect(indicator, QtCore.Qt.red)
>         painter.end()
>
> which yields this:
>
> How do I get the (rounded) rectangle of the menu itself though? I.e. I 
> only want to draw the red bar inside the menu area that will show the 
> items.
>
> I guess I should try to query the item view's rect via it's item 
> delegate or something, but I can't get it right.
> Any help would be appreciated.
>
> Happy Christmas!
>
> Cheers,
> frank
>
>
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