@SGaist The project consists of three cpp and two header files. The code of cpp files is listed below: myapp.cpp #include "myapp.h" myApp::myApp(QWidget *parent) : QMainWindow(parent) { QIcon icns(":/03_Images/simple_icon.png"); QPushButton* btnNormal = new QPushButton(this); btnNormal->setText("Normal"); btnNormal->setIcon(icns); QPushButton* btnActive = new QPushButton(this); btnActive->setText("Active"); btnActive->setIcon(icns); QPushButton* btnDisabled = new QPushButton(this); btnDisabled->setText("Disabled"); btnDisabled->setIcon(icns); btnDisabled->setEnabled(false); QHBoxLayout* layout = new QHBoxLayout(); layout->addWidget(btnNormal); layout->addWidget(btnActive); layout->addWidget(btnDisabled); QWidget* centralWidget = new QWidget(this); centralWidget->setLayout(layout); setCentralWidget(centralWidget); QMenu* menu = new QMenu(this); menu->setTitle("Menu"); QAction* actItem4_1 = menu -> addAction("Normal icon", this, SLOT(repaint())); actItem4_1 ->setIcon(icns); QAction* actItem4_2 = menu -> addAction("Active icon", this, SLOT(repaint())); actItem4_2 ->setIcon(icns); QAction* actItem4_3 = menu -> addAction("Disabled icon", this, SLOT(repaint())); actItem4_3 ->setIcon(icns); actItem4_3 ->setEnabled(false); QMenuBar* menuBar = new QMenuBar(this); menuBar->addMenu(menu); setMenuBar(menuBar); } mystyle.cpp #include "mystyle.h" MyStyle::MyStyle() : QProxyStyle(QStyleFactory::create("fusion")){ setObjectName("MyStyle"); } MyStyle::~MyStyle(){ // } void MyStyle::polish(QPalette& palette){ palette.setColor(QPalette::Window, QColor(230, 230, 230)); palette.setColor(QPalette::WindowText, QColor(64, 64, 64)); palette.setColor(QPalette::Base, QColor(248, 248, 248)); palette.setColor(QPalette::AlternateBase, QColor(243, 243, 243)); palette.setColor(QPalette::Text, QColor(64, 64, 64)); palette.setColor(QPalette::ToolTipBase, QColor(0, 255, 0)); palette.setColor(QPalette::ToolTipText, QColor(64, 64, 64)); palette.setColor(QPalette::Button, QColor(194, 194, 194)); palette.setColor(QPalette::ButtonText, QColor(64, 64, 64)); palette.setColor(QPalette::BrightText, QColor(0, 255, 0)); palette.setColor(QPalette::Highlight, QColor(86, 86, 86)); palette.setColor(QPalette::HighlightedText, QColor(191, 191, 191)); palette.setColor(QPalette::Disabled, QPalette::WindowText, QColor(128, 128, 128)); palette.setColor(QPalette::Disabled, QPalette::Button, QColor(214, 214, 214)); palette.setColor(QPalette::Disabled, QPalette::ButtonText, QColor(127, 127, 127)); palette.setColor(QPalette::Disabled, QPalette::Text, QColor(128, 128, 128)); palette.setColor(QPalette::Disabled, QPalette::HighlightedText, QColor(64, 128, 0)); } QPixmap MyStyle::generatedIconPixmap(QIcon::Mode iconMode, const QPixmap &pixmap, const QStyleOption *opt) const { QImage img = pixmap.toImage().convertToFormat(QImage::Format_ARGB32); QPainter painter(&img); painter.save(); switch (iconMode) { case QIcon::Normal: qDebug() << "Normal mode"; painter.fillRect(img.rect(), QColor(Qt::red)); break; case QIcon::Active: qDebug() << "Active mode"; painter.fillRect(img.rect(), QColor(Qt::green)); break; case QIcon::Disabled: qDebug() << "Disabled mode"; painter.fillRect(img.rect(), QColor(Qt::blue)); break; case QIcon::Selected: qDebug() << "Selected mode"; painter.fillRect(img.rect(), QColor(Qt::magenta)); break; default: qDebug() << "Other mode (Unknown)"; painter.fillRect(img.rect(), QColor(Qt::gray)); break; } painter.restore(); return QPixmap::fromImage(img); } main.cpp #include "myapp.h" #include <QApplication> #include "mystyle.h" int main(int argc, char *argv[]) { QApplication a(argc, argv); a.setStyle(new MyStyle()); myApp w; w.show(); return a.exec(); }