Subclassing QLabel to show native 'Mouse Hover Button indicator'

Question

I have a QLabel with a 'StyledPanel, raised' frame.
It is clickable, by subclassing QLabel;

class InteractiveLabel(QtGui.QLabel):
    def __init__(self, parent):  
        QtGui.QLabel.__init__(self, parent)

    def mouseReleaseEvent(self, event):  
        self.emit(QtCore.SIGNAL('clicked()'))

However, a general opinion is that this 'Box' is not easily recognised as clickable.
In an effort toward usability, I'd like the 'Box' to show it is clickable when the mouse is hovered over it.
Obviously a reaction to a mouse hover is easily achieved by connecting the mouseHoverEvent.

However, the 'button indicator' must be natively inherited, since my Qt application allows the User to change the style (out of Windows XP, Windows 7, plastique, motif, cde).

This image shows the particular widget (bottom right corner) and the mouseHover aesthetics I desire in two different styles.

When a mouse is hovered over 'Box', I'd like it to respond like the combobox has in the top, middle.
(The 'response' is aesthetically native and occurs with all Qt buttons, except in 'CDE' and 'motif'styles.).

Is there a way to implement this with PyQt4?
(I suppose non-native solutions would involve QGradient and checking the native style, but that's yucky.)

UPDATE:
lol4t0's idea of a QLabel over a QPushButton.

Here's my pythonic implementation with signals working properly and all the appropriate button aesthetics. The RichTextBox is the widget you would embed into the program.

from PyQt4 import QtCore, QtGui

class RichTextButton(QtGui.QPushButton):
    def __init__(self, parent=None):  
        QtGui.QPushButton.__init__(self, parent)
        self.UnitText = QtGui.QLabel(self)
        self.UnitText.setTextInteractionFlags(QtCore.Qt.NoTextInteraction)
        self.UnitText.setAlignment(QtCore.Qt.AlignCenter)
        self.UnitText.setMouseTracking(False)
        self.setLayout(QtGui.QVBoxLayout())
        self.layout().setMargin(0)
        self.layout().addWidget(self.UnitText)

Thanks!

---

Specs:
- python 2.7.2
- Windows 7
- PyQt4