Clickable elements or child widgets inside custom-painted delegate - qt

Question

I have a QListView, where I display items using a custom delegate with custom painting. Within each item (i.e. each list row) I want to be able to show a couple of "hyperlinks" which the user could click on and which would then call on some functions.
I have already tried to check the official documentation (e.g. Model/View Programming) as well as quite a lot of googling, but haven't been able to figure out how to accomplish this.
I have two ideas, each with their own problems:
I could draw them using child widgets, like a flat QPushButton. How do I then position and display these widgets?
I could also draw them as text strings. How do I then make them clickable? Or can I capture click events on the parent QListView and somehow determine coordinates from those? I could then match coordinates to these clickable elements and act accordingly.
My initial approach was to use QListWidget with .setItemWidget(), where I had a proper widget with a layout and child widgets. Unfortunately this was too slow when my list grew to hundreds or thousands of items. That's why I changed to QListView with a delegate.

Answer 1

I seem to be closing in on a solution.
I can receive clicks on the elements by overriding the delegate's .editorEvent(event, model, option, index). I can then find out the event.type(), the clicked row from index.row() and the actual coordinates from event.x() and event.y() (since, if the event type is MouseButtonRelease, the event is a QMouseEvent).
From these, I think I can correlate the coordinates to my elements on screen and act accordingly.
I will update this answer once I have working code.
EDIT
A simple working example, using PySide:
class MyModel(QtGui.QStandardItemModel):
def __init__(self):
super(MyModel, self).__init__()
for i in range(10): self.appendRow(QtGui.QStandardItem("Row %d" % i))
class MyDelegate(QtGui.QStyledItemDelegate):
def __init__(self, parent=None):
super(MyDelegate, self).__init__(parent)
self.links = {}
def makeLinkFunc(self, row, text):
def linkFunc(): print("Clicked on %s in row %d" % (text, row))
return linkFunc
def paint(self, painter, option, index):
painter.save()
textHeight = QtGui.QFontMetrics(painter.font()).height()
painter.drawText(option.rect.x()+2, option.rect.y()+2+textHeight, index.data())
rowLinks = {}
for i in range(3):
text = "Link %d" % (3-i)
linkWidth = QtGui.QFontMetrics(font).width(text)
x = option.rect.right() - (i+1) * (linkWidth + 10)
painter.drawText(x, y, text)
rect = QtCore.QRect(x, y - textHeight, linkWidth, textHeight)
rowLinks[rect] = self.makeLinkFunc(index.row(), text)
self.links[index.row()] = rowLinks
painter.restore()
def sizeHint(self, option, index):
hint = super().sizeHint(option, index)
hint.setHeight(30)
return hint
def editorEvent(self, event, model, option, index):
if event.type() == QtCore.QEvent.MouseButtonRelease:
for rect, link in self.links[index.row()].items():
if rect.contains(event.pos()):
link()
return True
return False
listmodel = MyModel()
listview = QtGui.QListView()
listview.setModel(listmodel)
listview.setItemDelegate(MyDelegate(parent=listview))
listview.setSelectionMode(QtGui.QAbstractItemView.NoSelection)