Can a QListView have different vertical and horizontal spacing?

Question

I am trying to make a QListView set to IconMode have a different spacing horizontally and vertically. Can this be achieved using this class?

Also, all of my icons have the same width but they change in height and I would like the view to adapt to these different sizes.

Answer 1

both can be done by QStyledItemDelegate(). In my example (pyqt5) model.data() returns the path of the icons, all icons have a width of 100. The return-value of sizeHint() depends on the height of the items icon and vertical- and horizontalSpacing:

class MyDelegate(QtWidgets.QStyledItemDelegate):
    def __init__(self):
        QtWidgets.QItemDelegate.__init__(self)
        self.pen= QtGui.QPen(QtGui.QColor(0,0,0))
        self.imageWidth = 100
        self.horizontalSpacing = 5
        self.verticalSpacing = 10

    def sizeHint(self, option, index):
        width = self.imageWidth + 2*self.horizontalSpacing
        height = QtGui.QImage(index.data()).height() + 2*self.verticalSpacing
        return QtCore.QSize(width, height)

    def paint(self, painter, option, index):
        border = option.rect    # item.rect in the view
        image = QtGui.QImage(index.data())  # model.data() returns the path of the imagefile
        painter.save()
        painter.setPen(self.pen)
        painter.drawRect(border)
        painter.drawImage(QtCore.QPointF(border.x() + self.horizontalSpacing, border.top() + self.verticalSpacing), image)
        painter.restore()

set the delegate to the view by setItemDelegate()

looks like this: