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| author | Timothy Pearson <[email protected]> | 2011-07-10 15:24:15 -0500 |
|---|---|---|
| committer | Timothy Pearson <[email protected]> | 2011-07-10 15:24:15 -0500 |
| commit | bd0f3345a938b35ce6a12f6150373b0955b8dd12 (patch) | |
| tree | 7a520322212d48ebcb9fbe1087e7fca28b76185c /doc/html/picture-example.html | |
| download | qt3-bd0f3345a938b35ce6a12f6150373b0955b8dd12.tar.gz qt3-bd0f3345a938b35ce6a12f6150373b0955b8dd12.zip | |
Add Qt3 development HEAD version
Diffstat (limited to 'doc/html/picture-example.html')
| -rw-r--r-- | doc/html/picture-example.html | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/doc/html/picture-example.html b/doc/html/picture-example.html new file mode 100644 index 0000000..72c1640 --- /dev/null +++ b/doc/html/picture-example.html @@ -0,0 +1,182 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> +<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/examples/picture/picture.doc:4 --> +<html> +<head> +<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> +<title>Picture</title> +<style type="text/css"><!-- +fn { margin-left: 1cm; text-indent: -1cm; } +a:link { color: #004faf; text-decoration: none } +a:visited { color: #672967; text-decoration: none } +body { background: #ffffff; color: black; } +--></style> +</head> +<body> + +<table border="0" cellpadding="0" cellspacing="0" width="100%"> +<tr bgcolor="#E5E5E5"> +<td valign=center> + <a href="index.html"> +<font color="#004faf">Home</font></a> + | <a href="classes.html"> +<font color="#004faf">All Classes</font></a> + | <a href="mainclasses.html"> +<font color="#004faf">Main Classes</font></a> + | <a href="annotated.html"> +<font color="#004faf">Annotated</font></a> + | <a href="groups.html"> +<font color="#004faf">Grouped Classes</font></a> + | <a href="functions.html"> +<font color="#004faf">Functions</font></a> +</td> +<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>Picture</h1> + + +<p> +This example shows how to make a picture, store it to a file, and read it as +a set of drawing commands. +<p> <hr> +<p> Implementation: +<p> <pre>/**************************************************************************** +** $Id: qt/picture.cpp 3.3.8 edited Jan 11 14:37 $ +** +** Copyright (C) 1992-2007 Trolltech ASA. 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 <<a href="qapplication-h.html">qapplication.h</a>> +#include <<a href="qpainter-h.html">qpainter.h</a>> +#include <<a href="qpicture-h.html">qpicture.h</a>> +#include <<a href="qpixmap-h.html">qpixmap.h</a>> +#include <<a href="qwidget-h.html">qwidget.h</a>> +#include <<a href="qmessagebox-h.html">qmessagebox.h</a>> +#include <<a href="qfile-h.html">qfile.h</a>> +#include <ctype.h> + + +void paintCar( <a href="qpainter.html">QPainter</a> *p ) // paint a car +{ + <a href="qpointarray.html">QPointArray</a> a; + <a href="qbrush.html">QBrush</a> brush( Qt::yellow, Qt::SolidPattern ); +<a name="x120"></a> p-><a href="qpainter.html#setBrush">setBrush</a>( brush ); // use solid, yellow brush + +<a name="x125"></a> a.setPoints( 5, 50,50, 350,50, 450,120, 450,250, 50,250 ); +<a name="x115"></a> p-><a href="qpainter.html#drawPolygon">drawPolygon</a>( a ); // draw car body + + <a href="qfont.html">QFont</a> f( "courier", 12, QFont::Bold ); +<a name="x121"></a> p-><a href="qpainter.html#setFont">setFont</a>( f ); + + <a href="qcolor.html">QColor</a> windowColor( 120, 120, 255 ); // a light blue color +<a name="x108"></a> brush.<a href="qbrush.html#setColor">setColor</a>( windowColor ); // set this brush color + p-><a href="qpainter.html#setBrush">setBrush</a>( brush ); // set brush +<a name="x116"></a> p-><a href="qpainter.html#drawRect">drawRect</a>( 80, 80, 250, 70 ); // car window +<a name="x117"></a> p-><a href="qpainter.html#drawText">drawText</a>( 180, 80, 150, 70, Qt::AlignCenter, "-- Qt --\nTrolltech AS" ); + + <a href="qpixmap.html">QPixmap</a> pixmap; +<a name="x124"></a> if ( pixmap.<a href="qpixmap.html#load">load</a>("flag.bmp") ) // load and draw image +<a name="x114"></a> p-><a href="qpainter.html#drawPixmap">drawPixmap</a>( 100, 85, pixmap ); + +<a name="x119"></a> p-><a href="qpainter.html#setBackgroundMode">setBackgroundMode</a>( Qt::OpaqueMode ); // set opaque mode + p-><a href="qpainter.html#setBrush">setBrush</a>( Qt::DiagCrossPattern ); // black diagonal cross pattern +<a name="x112"></a> p-><a href="qpainter.html#drawEllipse">drawEllipse</a>( 90, 210, 80, 80 ); // back wheel + p-><a href="qpainter.html#setBrush">setBrush</a>( Qt::CrossPattern ); // black cross fill pattern + p-><a href="qpainter.html#drawEllipse">drawEllipse</a>( 310, 210, 80, 80 ); // front wheel +} + + +class PictureDisplay : public <a href="qwidget.html">QWidget</a> // picture display widget +{ +public: + PictureDisplay( const char *fileName ); + ~PictureDisplay(); +protected: + void paintEvent( <a href="qpaintevent.html">QPaintEvent</a> * ); + void keyPressEvent( <a href="qkeyevent.html">QKeyEvent</a> * ); +private: + <a href="qpicture.html">QPicture</a> *pict; + <a href="qstring.html">QString</a> name; +}; + +<a name="f207"></a>PictureDisplay::PictureDisplay( const char *fileName ) +{ + pict = new <a href="qpicture.html">QPicture</a>; + name = fileName; +<a name="x122"></a> if ( !pict-><a href="qpicture.html#load">load</a>(fileName) ) { // cannot load picture + delete pict; + pict = 0; + name.<a href="qstring.html#sprintf">sprintf</a>( "Not able to load picture: %s", fileName ); + } +} + +PictureDisplay::~PictureDisplay() +{ + delete pict; +} + +void PictureDisplay::<a href="qwidget.html#paintEvent">paintEvent</a>( <a href="qpaintevent.html">QPaintEvent</a> * ) +{ + <a href="qpainter.html">QPainter</a> paint( this ); // paint widget + if ( pict ) +<a name="x113"></a> paint.<a href="qpainter.html#drawPicture">drawPicture</a>( *pict ); // draw picture + else + paint.<a href="qpainter.html#drawText">drawText</a>( <a href="qwidget.html#rect">rect</a>(), AlignCenter, name ); +} + +<a name="x127"></a>void PictureDisplay::<a href="qwidget.html#keyPressEvent">keyPressEvent</a>( <a href="qkeyevent.html">QKeyEvent</a> *k ) +{ +<a name="x109"></a> switch ( tolower(k-><a href="qkeyevent.html#ascii">ascii</a>()) ) { + case 'r': // reload + pict-><a href="qpicture.html#load">load</a>( name ); + <a href="qwidget.html#update">update</a>(); + break; + case 'q': // quit +<a name="x106"></a> QApplication::<a href="qapplication.html#exit">exit</a>(); + break; + } +} + + +int main( int argc, char **argv ) +{ + <a href="qapplication.html">QApplication</a> 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) ) { + <a href="qpicture.html">QPicture</a> pict; // our picture + <a href="qpainter.html">QPainter</a> paint; // our painter + +<a name="x111"></a> paint.<a href="qpainter.html#begin">begin</a>( &pict ); // begin painting onto picture + paintCar( &paint ); // paint! +<a name="x118"></a> paint.<a href="qpainter.html#end">end</a>(); // painting done + +<a name="x123"></a> pict.<a href="qpicture.html#save">save</a>( fileName ); // save picture +<a name="x110"></a> QMessageBox::<a href="qmessagebox.html#information">information</a>(0, "Qt Example - Picture", "Saved. Run me again!"); + return 0; + } else { + PictureDisplay test( fileName ); // create picture display + a.<a href="qapplication.html#setMainWidget">setMainWidget</a>( &test); // set main widget + test.<a href="qwidget.html#setCaption">setCaption</a>("Qt Example - Picture"); + test.<a href="qwidget.html#show">show</a>(); // show it + + return a.<a href="qapplication.html#exec">exec</a>(); // start event loop + } +} +</pre> + +<p>See also <a href="examples.html">Examples</a>. + +<!-- eof --> +<p><address><hr><div align=center> +<table width=100% cellspacing=0 border=0><tr> +<td>Copyright © 2007 +<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a> +<td align=right><div align=right>Qt 3.3.8</div> +</table></div></address></body> +</html> |