Changing QStyleOptionButton (QCheckbox) to use StyleSheet not working????

[jonathan_MVE]

HI,

I am trying to use a style sheet to change a QStyleOptionButton to work as a QCheckBox but display with my own checked/unchecked indicators. I have had success setting the stylesheet on normal checkboxes but in this case I need to use a QStyleOptionButton and this doesnt seem to work? My code is as follows:

QStyleOptionButton option;
//m_checkBoxRect is previously setup
m_checkboxRect.setY(rect.height() / 2 - m_checkboxRect.height() / 2);
 
QCheckBox* styledCheckBox = new QCheckBox();
styledCheckBox->setGeometry(m_checkboxRect);
styledCheckBox->setCheckState(m_checkboxState);
styledCheckBox->setStyleSheet(
			"QCheckedBox::indicator:unchecked { image: url(:/Resources/indicator_off.png);}"
			"QCheckedBox::indicator:checked { image: url(:/Resources/indicator_on.png);}"
			"QCheckedBox::indicator:indeterminate { image: url(:/Resources/indicator_partial.png);}"
			);
 
option.initFrom(styledCheckBox);	
option.rect = m_checkboxRect;		
 
style()->drawControl(QStyle::CE_CheckBox, &option, painter, this);

QStyleOptionButton option;
//m_checkBoxRect is previously setup
m_checkboxRect.setY(rect.height() / 2 - m_checkboxRect.height() / 2);

QCheckBox* styledCheckBox = new QCheckBox();
styledCheckBox->setGeometry(m_checkboxRect);
styledCheckBox->setCheckState(m_checkboxState);
styledCheckBox->setStyleSheet(
			"QCheckedBox::indicator:unchecked { image: url(:/Resources/indicator_off.png);}"
			"QCheckedBox::indicator:checked { image: url(:/Resources/indicator_on.png);}"
			"QCheckedBox::indicator:indeterminate { image: url(:/Resources/indicator_partial.png);}"
			);
				
option.initFrom(styledCheckBox);	
option.rect = m_checkboxRect;		

style()->drawControl(QStyle::CE_CheckBox, &option, painter, this);

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All I seem to get back is an unchecked checkbox which doesn't respond to my mouse presses.

Does anyone have any ideas as to why this wont work, or perhaps another route??