@TrilecStudios for the sake of completeness:
This is the current implementation for those interested.
//a simple implementation the calls the styling function
void CharcoalStyle::drawComplexControl(ComplexControl control, const QStyleOptionComplex *option, QPainter *painter, const QWidget *widget) const
{
switch (control) {
case CC_ComboBox:
{
setComboboxStyle(option, painter, widget ) ;
break;
}
default:
QProxyStyle::drawComplexControl(control, option, painter, widget);
break;
}
}
//the basic implementation of drawing a style for combobox
void CharcoalStyle::setComboboxStyle(const QStyleOption *option, QPainter* painter, const QWidget *widget) const
{
const auto comboOption = qstyleoption_cast<const QStyleOptionComboBox *>(option);
const auto comboBox = qobject_cast<QComboBox*>(const_cast<QWidget*>(widget));
if(!comboOption ) return;
bool isDown = (option->state & QStyle::State_Sunken);
bool isEnabled = (option->state & QStyle::State_Enabled);
bool hasFocus = (option->state & QStyle::State_HasFocus && option->state & QStyle::State_KeyboardFocusChange);
bool isOver = (option->state & QStyle::State_MouseOver);
bool isOn = (option->state & QStyle::State_On);
enum DESIGN {
NormalDesign = 0,
FlatDesign = 1,
Design1 = 2,
Design2 = 3
};
int design = NormalDesign;
QColor bgColor = ComboboxBg;
QColor fgColor = ComboboxFg;
QColor borderColor = ComboBoxBorder;
QColor iconColor = ComboBoxIcon;
QRect rect = comboOption->rect;
// prepare and load existing defaults
QFont font = comboBox->font();
Qt::Alignment alignment = Qt::AlignLeft | Qt::AlignVCenter;
// override any additional settings to take care of a design property being set (defined in header)
if (comboBox->property(Design1Property.toStdString().c_str()).toBool()) {
design = Design1;
bgColor = design1Bg;
fgColor = design1Fg;
borderColor = design1Border;
iconColor = design1Icon;
}
// design = NormalDesign; //defined at top of function as default
// ajust the colours if it's on to being slightly brighter for on state
if( isDown ) {
bgColor = bgColor.lighter(140);
fgColor = fgColor.lighter(110);
borderColor = borderColor.lighter(110);
iconColor = iconColor.lighter(110);
}
// ajust the colours on a disabled state adjusting saturation, lightness and transparency
if( !isEnabled ) {
// Convert the base color to HSL and adjust the saturation and brightness
bgColor = QColor::fromHslF(bgColor.hslHueF(), bgColor.hslSaturationF() * 0.7, bgColor.lightnessF() * 0.8);
fgColor = QColor::fromHslF(fgColor.hslHueF(), fgColor.hslSaturationF() * 0.7, fgColor.lightnessF() * 0.8);
iconColor = QColor::fromHslF(iconColor.hslHueF(), iconColor.hslSaturationF() * 0.7, iconColor.lightnessF() * 0.8);
bgColor.setAlpha(128); //a little bit of transparency
borderColor = bgColor;
}
// ajust the colours if we are hovering over the button or widget
if( isOver ) {
bgColor = bgColor.lighter(112);
fgColor = fgColor.lighter(112);
borderColor = borderColor.lighter(112);
iconColor = iconColor.lighter(112);
}
//setup the painter
painter->save();
//painter->setRenderHint(QPainter::Antialiasing);
painter->setRenderHints(QPainter::Antialiasing | QPainter::SmoothPixmapTransform);
painter->setBrush(bgColor);
painter->setFont(font);
//path handles anti-aliasing a lot better specially for rounded
QPainterPath path;
// draw the appropriate style
switch (design) {
case Design1:
path.addRect( rect );
painter->setPen(QPen( borderColor,2 ));
if( isOn ) {
painter->drawPath(path);
drawArrow( painter, Qt::DownArrow, rect, comboOption,iconColor);
}
else {
painter->fillPath(path, bgColor);
drawArrow( painter, Qt::RightArrow, rect, comboOption,iconColor);
}
painter->setPen(QPen(fgColor, 1));
painter->drawText(rect.adjusted(4, 0, -18, 0), alignment, comboOption->currentText);
break;
default:
painter->setPen(QPen( borderColor,1 ));
qreal radius = option->rect.height() / 2;
path.addRoundedRect(rect, radius,radius);
if( isOn ) {
painter->drawPath(path);
painter->setBrush(bgColor);
drawArrow( painter, Qt::DownArrow, rect, comboOption,iconColor);
}
else {
painter->fillPath(path, bgColor);
drawArrow( painter, Qt::RightArrow, rect, comboOption,iconColor);
}
painter->setPen(QPen(fgColor, 1));
painter->drawText(rect.adjusted( radius , 0, -18, 0), alignment, comboOption->currentText);
break;
}
painter->restore();
}
