Qt tutorial - t10/main.cpp

# Source code for tutorial 10: main.cpp

    /****************************************************************
    **
    ** Qt tutorial 10
    **
    ****************************************************************/

    #include <qapplication.h>
    #include <qpushbutton.h>
    #include <qscrollbar.h>
    #include <qlcdnumber.h>
    #include <qfont.h>

    #include "lcdrange.h"
    #include "cannon.h"

    class MyWidget : public QWidget
    {
    public:
        MyWidget( QWidget *parent=0, const char *name=0 );
    protected:
        void resizeEvent( QResizeEvent * );
    private:
        QPushButton *quit;
        LCDRange    *angle;
        LCDRange    *force;
        CannonField *cannonField;
    };

    MyWidget::MyWidget( QWidget *parent, const char *name )
            : QWidget( parent, name )
    {
        setMinimumSize( 500, 355 );

        quit = new QPushButton( "Quit", this, "quit" );
        quit->setGeometry( 10, 10, 75, 30 );
        quit->setFont( QFont( "Times", 18, QFont::Bold ) );

        connect( quit, SIGNAL(clicked()), qApp, SLOT(quit()) );

        angle  = new LCDRange( this, "angle" );
        angle->setRange( 5, 70 );
        angle->setGeometry( 10, quit->y() + quit->height() + 10, 75, 130 );

        force  = new LCDRange( this, "force" );
        force->setRange( 10, 50 );
        force->setGeometry( 10, angle->y() + angle->height() + 10, 75, 130 );

        cannonField = new CannonField( this, "cannonField" );
        cannonField->move( angle->x() + angle->width() + 10, angle->y() );
        cannonField->setBackgroundColor( QColor( 250, 250, 200) );

        connect( angle,SIGNAL(valueChanged(int)), cannonField,SLOT(setAngle(int)));
        connect( cannonField,SIGNAL(angleChanged(int)), angle,SLOT(setValue(int)));

        connect( force,SIGNAL(valueChanged(int)), cannonField,SLOT(setForce(int)));
        connect( cannonField,SIGNAL(forceChanged(int)), force,SLOT(setValue(int)));

        angle->setValue( 60 );
        force->setValue( 25 );
    }

    void MyWidget::resizeEvent( QResizeEvent * )
    {
        cannonField->resize( width()  - cannonField->x() - 10,
                             height() - cannonField->y() - 10 );
    }

    int main( int argc, char **argv )
    {
        QApplication::setColorSpec( QApplication::CustomColor );
        QApplication a( argc, argv );

        MyWidget w;
        w.setGeometry( 100, 100, 500, 355 );
        a.setMainWidget( &w );
        w.show();
        return a.exec();
    }