问一下，connect里面qApp是怎么来的啊？

dengwangxi

[code:1]
#include <qapplication.h>
#include <qpushbutton.h>
#include <qslider.h>
#include <qlcdnumber.h>
#include <qfont.h>

#include <qvbox.h>

class MyWidget : public QVBox
{
public:
    MyWidget( QWidget *parent=0, const char *name=0 );
};


MyWidget::MyWidget( QWidget *parent, const char *name )
        : QVBox( parent, name )
{
    QPushButton *quit = new QPushButton( "Quit", this, "quit" );
    quit->setFont( QFont( "Times", 18, QFont::Bold ) );

    connect( quit, SIGNAL(clicked()), qApp, SLOT(quit()) );      #qApp是怎么来的啊？

    QLCDNumber *lcd  = new QLCDNumber( 2, this, "lcd" );

    QSlider * slider = new QSlider( Horizontal, this, "slider" );
    slider->setRange( 0, 99 );
    slider->setValue( 0 );

    connect( slider, SIGNAL(valueChanged(int)), lcd, SLOT(display(int)) );
}
[/code:1]

_z_

全局变量，代表当前app

dengwangxi

Thank you very much!