I have a program that will allow people to track certain tasks that they are working on. I have stored the tasks in a list, and have created a widget (called "taskWidget") which I would like to use to represent each task on the list. I would like a widget instead of a regular row to make editing/comprehension easier.

I have created a scrollArea as my central widget and created a custom widget as my TaskView.

From what I understand, in TaskView I need to re-implement paintEvent(). My question is: how do I create and paint my taskWidget from inside paintEvent()?

I have used Mark Summerfield's excellent Rapid GUI Programming, and am basing my paintEvent off of his WaterModelView in chapter 16. I have spent 4 days scouring this forum, the internet, and PyQt's mailing lists, but cannot get anything to paint. I feel like I'm missing something fundamental.

I started with a QItemDelegate, and got my widget to appear as an editor, but not as the underlying task. I then moved away from QItemDelegate to subclassing QWidget and adding it to the scrollArea, so I know it needs to handle all painting inside that scrollArea.

Any help that can be provided would be greatly appreciated. It's in PyQt, but I understand enough C++ to get the gist of things if that helps anyone to respond.

Qt Code: 
  1. def paintEvent(self, event):
  2.         if self.model is None:
  3.             return
  4.         task = TaskWidget("999-999", 
  5.                           "THIS IS A RATHER LONG TASK NAME", 
  6.                           99999, 
  7.                           False)
  8.         size = task.height()
  9.         minY = event.rect().y()
  10.         maxY = minY + event.rect().height() + size
  11.         minY -= size
  12.         painter = QPainter(self)
  13.         painter.setRenderHint(QPainter.Antialiasing)
  14.         painter.setRenderHint(QPainter.TextAntialiasing)
  15.  
  16.         y = 0
  17.         for row in range(self.model.rowCount()):
  18.             if minY <= y <= maxY:
  19.                 painter.save()
  20.                 t = TaskWidget(self.model.tasks[row].studyNumber, 
  21.                                self.model.tasks[row].taskName, 
  22.                                self.model.tasks[row].timeInMinutes)
  23.                 painter.initFrom(t)
  24.                 painter.restore()
  25.             y += size
  26.             if y > maxY:
  27.                 break
To copy to clipboard, switch view to plain text mode