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copied!<p>Like I said in the other post this should work for you:</p> <p>main.cpp</p> <pre><code>#include <QApplication> #include "mywidget.h" int main(int argc, char *argv[]) { QApplication app(argc, argv); MyWidget widget; widget.show(); return app.exec(); } </code></pre> <p>mywidget.h</p> <pre><code> #ifndef MYWIDGET_H #define MYWIDGET_H #include <QWidget> #include <QObject> include <QPushButton> #include <QSlider> class MyWidget : public QWidget { Q_OBJECT public: MyWidget(QWidget *parent = 0); ~MyWidget(){}; public slots: void getSliderValueAndQuit(); private: QPushButton *quit; QSlider *slider; }; #endif // MYWIDGET_H </code></pre> <p>myWidget.cpp</p> <pre><code> #include "mywidget.h" #include <QWidget> #include <QObject> #include <QApplication> #include <QFont> #include <QLCDNumber> #include <QPushButton> #include <QSlider> #include <QVBoxLayout> MyWidget::MyWidget(QWidget *parent) : QWidget(parent) { quit = new QPushButton(tr("Quit")); quit->setFont(QFont("Times", 18, QFont::Bold)); QLCDNumber *lcd = new QLCDNumber(3); lcd->setSegmentStyle(QLCDNumber::Flat); slider = new QSlider(Qt::Horizontal); slider->setRange(0, 999); slider->setValue(0); connect(quit, SIGNAL(clicked()), qApp, SLOT(quit())); connect(slider, SIGNAL(valueChanged(int)),lcd, SLOT(display(int))); connect(slider,SIGNAL(sliderReleased()), SLOT(getSliderValueAndQuit())); QVBoxLayout *layout = new QVBoxLayout; layout->addWidget(quit); layout->addWidget(lcd); layout->addWidget(slider); setLayout(layout); } void MyWidget::getSliderValueAndQuit(){ if(slider->value() == slider->maximum()) close(); } </code></pre>

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