#include <QApplication>
#include <QAction>
#include <QWidget>

int main(int a,char** b)
{
    QApplication app(a,b);
    QWidget wgt;
    QAction action(&wgt);
    action.setShortcut(QObject::tr("Ctrl+O")); 
    QObject::connect(&action,SIGNAL(triggered()),&app,SLOT(quit()));
    wgt.addAction(&action);
    wgt.show();
    return app.exec();
}

Цитата(FladeX @ 19.3.2009, 15:24)

enum EPages{...};

Page_Intro;

ExpertSystem::Page_Intro;

#include <QHeaderView>

Цитата(Litkevich Yuriy @ 11.3.2009, 18:00)

if (ver = QGLFormat::OpenGL_Version_3_0)

#include <QApplication>
#include <QImage>
#include <QPainter>
#include <QLabel>
#include <QEvent>
#include <QKeyEvent>
#include <QRect>
#include <QBrush>
#include <QPen>
#include <QColor>
#include <QPaintDevice>
#include <iostream>

class PLabel:public QLabel {
    enum EKindOfDraw{
        e_ONWIDGET=49,
        e_ONIMAGE,
    };
public:
    PLabel(QWidget* parent= NULL):QLabel(parent),m_image(e_ONWIDGET){this->resize(100,100);}
private:
    EKindOfDraw m_image;
protected:
    void keyPressEvent(QKeyEvent* ev) {
        int key = ev->key();
        if(ev->type() != QEvent::KeyPress) return;
        std::cout<<"key press"<<key<<"\n";
        m_image = (EKindOfDraw)key;
        this->update();
        QWidget::keyPressEvent(ev);
    }
void DrawImage(){
    QImage image(this->size(),QImage::Format_RGB32);
    DrawOnDevice(&image,QColor(Qt::green));
    QPainter painter(this);
    painter.drawImage(this->rect(),image);
    painter.end();
}
    void paintEvent(QPaintEvent* ev) {
        switch(m_image){
            case e_ONWIDGET: DrawOnDevice(this,QColor(Qt::red)); break;
            case e_ONIMAGE:  DrawImage(); break;
            default: break;
        }
}
void DrawOnDevice(QPaintDevice* dev,const QColor& color) {
    QPainter painter(dev);
    painter.fillRect(QRect(0,0,dev->width(),dev->height()),QBrush(color));
    painter.drawText(QRect(0,0,dev->width(),dev->height()),"TEXT:)");
    painter.end();
}

};

int main(int a,char** b)
{
    QApplication app(a,b);
    PLabel plabel;
    plabel.show();
    return app.exec();
}