C++/Qt/QWindowsStyle

Custom style

<source lang="cpp"> /****************************************************************************

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1. ifndef CUSTOMSTYLE_H
2. define CUSTOMSTYLE_H
3. include <QWindowsStyle>

class CustomStyle : public QWindowsStyle {

   Q_OBJECT

public:

   CustomStyle()
   ~CustomStyle() {}
   void drawPrimitive(PrimitiveElement element, const QStyleOption *option,
                      QPainter *painter, const QWidget *widget) const;

};

1. endif

1. include <QtGui>
2. include "customstyle.h"

CustomStyle::CustomStyle() {

   QSpinBox *spinBox = qobject_cast<QSpinBox *>(widget);
   if (spinBox) {
   }

} void CustomStyle::drawPrimitive(PrimitiveElement element, const QStyleOption *option,

                               QPainter *painter, const QWidget *widget) const

{

   if (element == PE_IndicatorSpinUp || element == PE_IndicatorSpinDown) {
 QPolygon points(3);
 int x = option->rect.x();
 int y = option->rect.y();
 int w = option->rect.width() / 2;
 int h = option->rect.height() / 2;
 x += (option->rect.width() - w) / 2;
 y += (option->rect.height() - h) / 2;
 if (element == PE_IndicatorSpinUp) {
     points[0] = QPoint(x, y + h);
     points[1] = QPoint(x + w, y + h);
     points[2] = QPoint(x + w / 2, y);
 } else { // PE_SpinBoxDown
     points[0] = QPoint(x, y);
     points[1] = QPoint(x + w, y);
     points[2] = QPoint(x + w / 2, y + h);
 }
 if (option->state & State_Enabled) {
     painter->setPen(option->palette.mid().color());
     painter->setBrush(option->palette.buttonText());
 } else {
     painter->setPen(option->palette.buttonText().color());
     painter->setBrush(option->palette.mid());
 }
 painter->drawPolygon(points);
   } else {
 QWindowsStyle::drawPrimitive(element, option, painter, widget);
   }

}

1. include <QtGui>
2. include "customstyle.h"

int main(int argc, char *argv[]) {

   QApplication::setStyle(new CustomStyle);
   QApplication app(argc, argv);
   QSpinBox spinBox;
   spinBox.show();
   return app.exec();

}

 </source>