#include <qapplication.h> #include <qmainwindow.h> #include <qwt_counter.h> #include <qtoolbar.h> #include <qlabel.h> #include <qlayout.h> #include "data_plot.h" class MainWindow: public QMainWindow { public: MainWindow() { QToolBar *toolBar = new QToolBar(this); toolBar->setFixedHeight(80); #if QT_VERSION < 0x040000 setDockEnabled(TornOff, true); setRightJustification(true); #else toolBar->setAllowedAreas(Qt::TopToolBarArea | Qt::BottomToolBarArea); #endif QWidget *hBox = new QWidget(toolBar); QLabel *label = new QLabel("Timer Interval", hBox); QwtCounter *counter = new QwtCounter(hBox); counter->setRange(-1.0, 100.0, 1.0); QHBoxLayout *layout = new QHBoxLayout(hBox); layout->addWidget(label); layout->addWidget(counter); layout->addWidget(new QWidget(hBox), 10); // spacer); #if QT_VERSION >= 0x040000 toolBar->addWidget(hBox); #endif addToolBar(toolBar); DataPlot *plot = new DataPlot(this); setCentralWidget(plot); connect(counter, SIGNAL(valueChanged(double)), plot, SLOT(setTimerInterval(double)) ); counter->setValue(20.0); } }; int main(int argc, char **argv) { QApplication a(argc, argv); MainWindow mainWindow; #if QT_VERSION < 0x040000 a.setMainWidget(&mainWindow); #endif mainWindow.resize(600,400); mainWindow.show(); return a.exec(); }