hello.cpp

基于qt的hello world 程序,在arm 的开发板上运行,

/****************************************************************************
** Form implementation generated from reading ui file 'hello.ui'
**
** Created: Wed Jun 23 18:02:36 2004
**      by:  The User Interface Compiler (uic)
**
** WARNING! All changes made in this file will be lost!
****************************************************************************/
#include "hello.h"

#include <qtopia/qpeapplication.h>
#ifdef QWS
#include <qtopia/qcopenvelope_qws.h>
#endif
#include <qtopia/config.h>
#include <qtopia/timestring.h>
#include <qtopia/alarmserver.h>
#include <qtopia/sound.h>
#include <qtopia/resource.h>

#include <qlayout.h>
#include <qvariant.h>
#include <qtooltip.h>
#include <qwhatsthis.h>
#include <qpushbutton.h>
#include <qtimer.h>
#include <qpainter.h>
#include <qpixmap.h>
#include <qwhatsthis.h>

/* 
 *  Constructs a Hello which is a child of 'parent', with the 
 *  name 'name' and widget flags set to 'f' 
 */
Hello::Hello( QWidget* parent,  const char* name, WFlags fl )
    : QWidget( parent, name, fl )
{
    if ( !name )
	setName( "Hello" );
    resize( 240, 320 ); 
    setWFlags(fl | Qt::WStyle_ContextHelp);
    setMinimumSize( QSize( 240, 320 ) );
    setMaximumSize( QSize( 240, 320 ) );
    setSizeIncrement( QSize( 240, 320 ) );
    setBaseSize( QSize( 240, 320 ) );
    QPalette pal;
    QColorGroup cg;
    cg.setColor( QColorGroup::Foreground, black );
    cg.setColor( QColorGroup::Button, QColor( 192, 192, 192) );
    cg.setColor( QColorGroup::Light, white );
    cg.setColor( QColorGroup::Midlight, QColor( 223, 223, 223) );
    cg.setColor( QColorGroup::Dark, QColor( 96, 96, 96) );
    cg.setColor( QColorGroup::Mid, QColor( 128, 128, 128) );
    cg.setColor( QColorGroup::Text, black );
    cg.setColor( QColorGroup::BrightText, white );
    cg.setColor( QColorGroup::ButtonText, black );
    cg.setColor( QColorGroup::Base, white );
    cg.setColor( QColorGroup::Background, white );
    cg.setColor( QColorGroup::Shadow, black );
    cg.setColor( QColorGroup::Highlight, black );
    cg.setColor( QColorGroup::HighlightedText, white );
    pal.setActive( cg );
    cg.setColor( QColorGroup::Foreground, black );
    cg.setColor( QColorGroup::Button, QColor( 192, 192, 192) );
    cg.setColor( QColorGroup::Light, white );
    cg.setColor( QColorGroup::Midlight, QColor( 220, 220, 220) );
    cg.setColor( QColorGroup::Dark, QColor( 96, 96, 96) );
    cg.setColor( QColorGroup::Mid, QColor( 128, 128, 128) );
    cg.setColor( QColorGroup::Text, black );
    cg.setColor( QColorGroup::BrightText, white );
    cg.setColor( QColorGroup::ButtonText, black );
    cg.setColor( QColorGroup::Base, white );
    cg.setColor( QColorGroup::Background, white );
    cg.setColor( QColorGroup::Shadow, black );
    cg.setColor( QColorGroup::Highlight, black ); 
    cg.setColor( QColorGroup::HighlightedText, white );
    pal.setInactive( cg );
    cg.setColor( QColorGroup::Foreground, QColor( 128, 128, 128) );
    cg.setColor( QColorGroup::Button, QColor( 192, 192, 192) );
    cg.setColor( QColorGroup::Light, white );
    cg.setColor( QColorGroup::Midlight, QColor( 220, 220, 220) );
    cg.setColor( QColorGroup::Dark, QColor( 96, 96, 96) );
    cg.setColor( QColorGroup::Mid, QColor( 128, 128, 128) );
    cg.setColor( QColorGroup::Text, black );
    cg.setColor( QColorGroup::BrightText, white );
    cg.setColor( QColorGroup::ButtonText, QColor( 128, 128, 128) );
    cg.setColor( QColorGroup::Base, white );
    cg.setColor( QColorGroup::Background, white );
    cg.setColor( QColorGroup::Shadow, black );
    cg.setColor( QColorGroup::Highlight, black );
    cg.setColor( QColorGroup::HighlightedText, white );
    pal.setDisabled( cg );
    setPalette( pal );
    QFont f( font() );
    f.setFamily( "adobe-helvetica" );
    f.setPointSize( 29 );
    f.setBold( TRUE );
    setFont( f ); 
    setCaption( tr( "" ) );

    //手动添加的代码
    t = "Hello,World";
    b = 0;
    QTimer *timer = new QTimer(this);
    connect( timer, SIGNAL(timeout()), SLOT(animate()) );
    timer->start( 40 );
    QWhatsThis::add(  this, tr( "this is hello, world sample." ) );
}

/*  
 *  Destroys the object and frees any allocated resources
 */
Hello::~Hello()
{
    // no need to delete child widgets, Qt does it all for us
}
/*
  This private slot is called each time the timer fires.
*/

//以下是手动添加的代码
void Hello::animate()
{
    b = (b + 1) & 15;
    repaint( FALSE );
}


/*
  Handles mouse button release events for the Hello widget.

  We emit the clicked() signal when the mouse is released inside
  the widget.
*/

void Hello::mouseReleaseEvent( QMouseEvent *e )
{
    if ( rect().contains( e->pos() ) )
        emit clicked();
}


/*
  Handles paint events for the Hello widget.

  Flicker-free update. The text is first drawn in the pixmap and the
  pixmap is then blt'ed to the screen.
*/

void Hello::paintEvent( QPaintEvent * )
{
    static int sin_tbl[16] = {
        0, 38, 71, 92, 100, 92, 71, 38,	0, -38, -71, -92, -100, -92, -71, -38};

    if ( t.isEmpty() )
        return;

    // 1: Compute some sizes, positions etc.
    QFontMetrics fm = fontMetrics();
    int w = fm.width(t) + 20;
    int h = fm.height() * 2;
    int pmx = width()/2 - w/2;
    int pmy = height()/2 - h/2;

    // 2: Create the pixmap and fill it with the widget's background
    QPixmap pm( w, h );
    pm.fill( this, pmx, pmy );

    // 3: Paint the pixmap. Cool wave effect
    QPainter p;
    int x = 10;
    int y = h/2 + fm.descent();
    int i = 0;
    p.begin( &pm );
    p.setFont( font() );
    while ( !t[i].isNull() ) {
        int i16 = (b+i) & 15;
        p.setPen( QColor((15-i16)*16,255,255,QColor::Hsv) );
        p.drawText( x, y-sin_tbl[i16]*h/800, t.mid(i,1), 1 );
        x += fm.width( t[i] );
        i++;
    }
    p.end();

    // 4: Copy the pixmap to the Hello widget
    bitBlt( this, pmx, pmy, &pm );
}