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- /****************************************************************************
- ** $Id: qt/picture.cpp 3.0.3 edited Oct 12 12:18 $
- **
- ** Copyright (C) 1992-2000 Trolltech AS. All rights reserved.
- **
- ** This file is part of an example program for Qt. This example
- ** program may be used, distributed and modified without limitation.
- **
- *****************************************************************************/
-
- #include <qapplication.h>
- #include <qpainter.h>
- #include <qpicture.h>
- #include <qpixmap.h>
- #include <qwidget.h>
- #include <qmessagebox.h>
- #include <qfile.h>
- #include <ctype.h>
-
-
- void paintCar( QPainter *p ) // paint a car
- {
- QPointArray a;
- QBrush brush( Qt::yellow, Qt::SolidPattern );
- p->setBrush( brush ); // use solid, yellow brush
-
- a.setPoints( 5, 50,50, 350,50, 450,120, 450,250, 50,250 );
- p->drawPolygon( a ); // draw car body
-
- QFont f( "courier", 12, QFont::Bold );
- p->setFont( f );
-
- QColor windowColor( 120, 120, 255 ); // a light blue color
- brush.setColor( windowColor ); // set this brush color
- p->setBrush( brush ); // set brush
- p->drawRect( 80, 80, 250, 70 ); // car window
- p->drawText( 180, 80, 150, 70, Qt::AlignCenter, "-- Qt --\nTrolltech AS" );
-
- QPixmap pixmap;
- if ( pixmap.load("flag.bmp") ) // load and draw image
- p->drawPixmap( 100, 85, pixmap );
-
- p->setBackgroundMode( Qt::OpaqueMode ); // set opaque mode
- p->setBrush( Qt::DiagCrossPattern ); // black diagonal cross pattern
- p->drawEllipse( 90, 210, 80, 80 ); // back wheel
- p->setBrush( Qt::CrossPattern ); // black cross fill pattern
- p->drawEllipse( 310, 210, 80, 80 ); // front wheel
- }
-
-
- class PictureDisplay : public QWidget // picture display widget
- {
- public:
- PictureDisplay( const char *fileName );
- ~PictureDisplay();
- protected:
- void paintEvent( QPaintEvent * );
- void keyPressEvent( QKeyEvent * );
- private:
- QPicture *pict;
- QString name;
- };
-
- PictureDisplay::PictureDisplay( const char *fileName )
- {
- pict = new QPicture;
- name = fileName;
- if ( !pict->load(fileName) ) { // cannot load picture
- delete pict;
- pict = 0;
- name.sprintf( "Not able to load picture: %s", fileName );
- }
- }
-
- PictureDisplay::~PictureDisplay()
- {
- delete pict;
- }
-
- void PictureDisplay::paintEvent( QPaintEvent * )
- {
- QPainter paint( this ); // paint widget
- if ( pict )
- paint.drawPicture( *pict ); // draw picture
- else
- paint.drawText( rect(), AlignCenter, name );
- }
-
- void PictureDisplay::keyPressEvent( QKeyEvent *k )
- {
- switch ( tolower(k->ascii()) ) {
- case 'r': // reload
- pict->load( name );
- update();
- break;
- case 'q': // quit
- QApplication::exit();
- break;
- }
- }
-
-
- int main( int argc, char **argv )
- {
- QApplication a( argc, argv ); // QApplication required!
-
- const char *fileName = "car.pic"; // default picture file name
-
- if ( argc == 2 ) // use argument as file name
- fileName = argv[1];
-
- if ( !QFile::exists(fileName) ) {
- QPicture pict; // our picture
- QPainter paint; // our painter
-
- paint.begin( &pict ); // begin painting onto picture
- paintCar( &paint ); // paint!
- paint.end(); // painting done
-
- pict.save( fileName ); // save picture
- QMessageBox::information(0, "Qt Example - Picture", "Saved. Run me again!");
- return 0;
- } else {
- PictureDisplay test( fileName ); // create picture display
- a.setMainWidget( &test); // set main widget
- test.setCaption("Qt Example - Picture");
- test.show(); // show it
-
- return a.exec(); // start event loop
- }
- }
-