def on_pressed(self):
"""Button pressed event handler
Shows color dialog and sets the chosen color.
"""
dlg = QColorDialog(self.parent())
dlg.setCurrentColor(self.color)
dlg.setWindowTitle(self.title)
dlg.setWindowFlags(Qt.Tool | Qt.FramelessWindowHint)
dlg.setWindowModality(Qt.ApplicationModal)
dlg.setOptions(QColorDialog.DontUseNativeDialog)
p = self.mapFromGlobal(QCursor.pos())
p.setX(p.x() + (self.rect().width() / 2))
p.setY(p.y() + (self.rect().height() / 2))
dlg.move(self.mapToGlobal(p))
if dlg.exec_():
self.color = dlg.currentColor()
self.colorChanged.emit()
