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| author | Timothy Pearson <kb9vqf@pearsoncomputing.net> | 2011-07-10 15:24:15 -0500 |
|---|---|---|
| committer | Timothy Pearson <kb9vqf@pearsoncomputing.net> | 2011-07-10 15:24:15 -0500 |
| commit | bd0f3345a938b35ce6a12f6150373b0955b8dd12 (patch) | |
| tree | 7a520322212d48ebcb9fbe1087e7fca28b76185c /doc/html/movies-example.html | |
| download | qt3-bd0f3345a938b35ce6a12f6150373b0955b8dd12.tar.gz qt3-bd0f3345a938b35ce6a12f6150373b0955b8dd12.zip | |
Add Qt3 development HEAD version
Diffstat (limited to 'doc/html/movies-example.html')
| -rw-r--r-- | doc/html/movies-example.html | 344 |
1 files changed, 344 insertions, 0 deletions
diff --git a/doc/html/movies-example.html b/doc/html/movies-example.html new file mode 100644 index 0000000..d3c837d --- /dev/null +++ b/doc/html/movies-example.html @@ -0,0 +1,344 @@ +<!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/movies/movies.doc:4 --> +<html> +<head> +<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> +<title>Movies or the Story of the Animated GIF file</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>Movies or the Story of the Animated GIF file</h1> + + +<p> +The Movies example displays MNG and animated GIF files using the <a href="qmovie.html">QMovie</a> and +<a href="qlabel.html">QLabel</a> classes. +<p> The movies will only read an animated GIF if GIF reading was enabled when Qt was built. +<p> <hr> +<p> Main: +<p> <pre>/**************************************************************************** +** $Id: qt/main.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="qfiledialog-h.html">qfiledialog.h</a>> +#include <<a href="qpushbutton-h.html">qpushbutton.h</a>> +#include <<a href="qlabel-h.html">qlabel.h</a>> +#include <<a href="qpainter-h.html">qpainter.h</a>> +#include <<a href="qmessagebox-h.html">qmessagebox.h</a>> +#include <<a href="qmovie-h.html">qmovie.h</a>> +#include <<a href="qvbox-h.html">qvbox.h</a>> + + +class MovieScreen : public <a href="qframe.html">QFrame</a> { + <a href="metaobjects.html#Q_OBJECT">Q_OBJECT</a> + <a href="qmovie.html">QMovie</a> movie; + <a href="qstring.html">QString</a> filename; + <a href="qsize.html">QSize</a> sh; + +public: + MovieScreen(const char* fname, QMovie m, QWidget* p=0, const char* name=0, WFlags f=0) : + <a href="qframe.html">QFrame</a>(p, name, f), + sh(100,100) + { + setCaption(fname); + filename = fname; + movie = m; + + // Set a frame around the movie. + setFrameStyle(QFrame::WinPanel|QFrame::Sunken); + + // No background needed, since we draw on the whole widget. +<a name="x523"></a> movie.<a href="qwidget.html#setBackgroundColor">setBackgroundColor</a>(backgroundColor()); + setBackgroundMode(NoBackground); + + // Get the movie to tell use when interesting things happen. +<a name="x500"></a> movie.<a href="qmovie.html#connectUpdate">connectUpdate</a>(this, SLOT(movieUpdated(const <a href="qrect.html">QRect</a>&))); +<a name="x498"></a> movie.<a href="qmovie.html#connectResize">connectResize</a>(this, SLOT(movieResized(const <a href="qsize.html">QSize</a>&))); +<a name="x499"></a> movie.<a href="qmovie.html#connectStatus">connectStatus</a>(this, SLOT(movieStatus(int))); + + setSizePolicy(QSizePolicy(QSizePolicy::Expanding,QSizePolicy::Expanding)); + } + + <a href="qsize.html">QSize</a> sizeHint() const + { + return sh; + } + +protected: + + // Draw the contents of the QFrame - the movie and on-screen-display + void drawContents(QPainter* p) + { + // Get the current movie frame. +<a name="x502"></a> <a href="qpixmap.html">QPixmap</a> pm = movie.<a href="qmovie.html#framePixmap">framePixmap</a>(); + + // Get the area we have to draw in. + <a href="qrect.html">QRect</a> r = contentsRect(); + +<a name="x511"></a> if ( !pm.<a href="qpixmap.html#isNull">isNull</a>() ) { + // Only rescale is we need to - it can take CPU! +<a name="x516"></a><a name="x512"></a> if ( r.<a href="qrect.html#size">size</a>() != pm.<a href="qpixmap.html#size">size</a>() ) { + <a href="qwmatrix.html">QWMatrix</a> m; +<a name="x524"></a><a name="x517"></a><a name="x513"></a> m.<a href="qwmatrix.html#scale">scale</a>((double)r.<a href="qrect.html#width">width</a>()/pm.<a href="qpixmap.html#width">width</a>(), +<a name="x515"></a><a name="x510"></a> (double)r.<a href="qrect.html#height">height</a>()/pm.<a href="qpixmap.html#height">height</a>()); +<a name="x514"></a> pm = pm.<a href="qpixmap.html#xForm">xForm</a>(m); + } + + // Draw the [possibly scaled] frame. movieUpdated() below calls + // repaint with only the changed area, so clipping will ensure we + // only do the minimum amount of rendering. + // +<a name="x519"></a><a name="x518"></a> p->drawPixmap(r.<a href="qrect.html#x">x</a>(), r.<a href="qrect.html#y">y</a>(), pm); + } + + + // The on-screen display + + const char* message = 0; + +<a name="x504"></a> if (movie.<a href="qmovie.html#paused">paused</a>()) { + message = "PAUSED"; +<a name="x501"></a> } else if (movie.<a href="qmovie.html#finished">finished</a>()) { + message = "THE END"; +<a name="x507"></a> } else if (movie.<a href="qmovie.html#steps">steps</a>() > 0) { + message = "FF >>"; + } + + if (message) { + // Find a good font size... + p->setFont(QFont("Helvetica", 24)); + + <a href="qfontmetrics.html">QFontMetrics</a> fm = p->fontMetrics(); +<a name="x496"></a> if ( fm.<a href="qfontmetrics.html#width">width</a>(message) > r.<a href="qrect.html#width">width</a>()-10 ) + p->setFont(QFont("Helvetica", 18)); + + fm = p->fontMetrics(); + if ( fm.<a href="qfontmetrics.html#width">width</a>(message) > r.<a href="qrect.html#width">width</a>()-10 ) + p->setFont(QFont("Helvetica", 14)); + + fm = p->fontMetrics(); + if ( fm.<a href="qfontmetrics.html#width">width</a>(message) > r.<a href="qrect.html#width">width</a>()-10 ) + p->setFont(QFont("Helvetica", 12)); + + fm = p->fontMetrics(); + if ( fm.<a href="qfontmetrics.html#width">width</a>(message) > r.<a href="qrect.html#width">width</a>()-10 ) + p->setFont(QFont("Helvetica", 10)); + + // "Shadow" effect. + p->setPen(black); + p->drawText(1, 1, width()-1, height()-1, AlignCenter, message); + p->setPen(white); + p->drawText(0, 0, width()-1, height()-1, AlignCenter, message); + } + } + +public slots: + void restart() + { +<a name="x505"></a> movie.<a href="qmovie.html#restart">restart</a>(); + repaint(); + } + + void togglePause() + { + if ( movie.<a href="qmovie.html#paused">paused</a>() ) +<a name="x508"></a> movie.<a href="qmovie.html#unpause">unpause</a>(); + else +<a name="x503"></a> movie.<a href="qmovie.html#pause">pause</a>(); + repaint(); + } + + void step() + { +<a name="x506"></a> movie.<a href="qmovie.html#step">step</a>(); + repaint(); + } + + void step10() + { + movie.<a href="qmovie.html#step">step</a>(10); + repaint(); + } + +private slots: + void movieUpdated(const <a href="qrect.html">QRect</a>& area) + { + if (!isVisible()) + show(); + + // The given area of the movie has changed. + + <a href="qrect.html">QRect</a> r = contentsRect(); + + if ( r.<a href="qrect.html#size">size</a>() != movie.<a href="qmovie.html#framePixmap">framePixmap</a>().size() ) { + // Need to scale - redraw whole frame. + repaint( r ); + } else { + // Only redraw the changed area of the frame + repaint( area.<a href="qrect.html#x">x</a>()+r.<a href="qrect.html#x">x</a>(), area.<a href="qrect.html#y">y</a>()+r.<a href="qrect.html#x">x</a>(), + area.<a href="qrect.html#width">width</a>(), area.<a href="qrect.html#height">height</a>() ); + } + } + + void movieResized(const <a href="qsize.html">QSize</a>& size) + { + // The movie changed size, probably from its initial zero size. + + int fw = frameWidth(); +<a name="x521"></a><a name="x520"></a> sh = QSize( size.<a href="qsize.html#width">width</a>() + fw*2, size.<a href="qsize.html#height">height</a>() + fw*2 ); + <a href="qwidget.html#updateGeometry">updateGeometry</a>(); + if ( <a href="qwidget.html#parentWidget">parentWidget</a>() && parentWidget()->isHidden() ) + <a href="qwidget.html#parentWidget">parentWidget</a>()->show(); + } + + void movieStatus(int status) + { + // The movie has sent us a status message. + + if (status < 0) { + <a href="qstring.html">QString</a> msg; + msg.<a href="qstring.html#sprintf">sprintf</a>("Could not play movie \"%s\"", (const char*)filename); + QMessageBox::<a href="qmessagebox.html#warning">warning</a>(this, "movies", msg); + <a href="qwidget.html#parentWidget">parentWidget</a>()->close(); + } else if (status == QMovie::Paused || status == QMovie::EndOfMovie) { + <a href="qwidget.html#repaint">repaint</a>(); // Ensure status text is displayed + } + } +}; + +class MoviePlayer : public <a href="qvbox.html">QVBox</a> { + MovieScreen* movie; +public: + MoviePlayer(const char* fname, QMovie m, QWidget* p=0, const char* name=0, WFlags f=0) : + <a href="qvbox.html">QVBox</a>(p,name,f) + { + movie = new MovieScreen(fname, m, this); + <a href="qhbox.html">QHBox</a>* hb = new <a href="qhbox.html">QHBox</a>(this); + <a href="qpushbutton.html">QPushButton</a>* btn; + btn = new <a href="qpushbutton.html">QPushButton</a>("<<", hb); + <a href="qobject.html#connect">connect</a>(btn, SIGNAL(<a href="qbutton.html#clicked">clicked</a>()), movie, SLOT(<a href="qmovie.html#restart">restart</a>())); + btn = new <a href="qpushbutton.html">QPushButton</a>("||", hb); + <a href="qobject.html#connect">connect</a>(btn, SIGNAL(<a href="qbutton.html#clicked">clicked</a>()), movie, SLOT(togglePause())); + btn = new <a href="qpushbutton.html">QPushButton</a>(">|", hb); + <a href="qobject.html#connect">connect</a>(btn, SIGNAL(<a href="qbutton.html#clicked">clicked</a>()), movie, SLOT(<a href="qmovie.html#step">step</a>())); + btn = new <a href="qpushbutton.html">QPushButton</a>(">>|", hb); + <a href="qobject.html#connect">connect</a>(btn, SIGNAL(<a href="qbutton.html#clicked">clicked</a>()), movie, SLOT(step10())); + } +}; + + +// A QFileDialog that chooses movies. +// +class MovieStarter: public <a href="qfiledialog.html">QFileDialog</a> { + Q_OBJECT +public: + MovieStarter(const char *dir); + +public slots: + void startMovie(const <a href="qstring.html">QString</a>& filename); + // QDialog's method - normally closes the file dialog. + // We want it left open, and we want Cancel to quit everything. + void done( int r ); +}; + + +<a name="f258"></a>MovieStarter::MovieStarter(const char *dir) + : <a href="qfiledialog.html">QFileDialog</a>(dir, "*.gif *.mng") +{ + //behave as in getOpenFilename + <a href="qfiledialog.html#setMode">setMode</a>( ExistingFile ); + // When a file is selected, show it as a movie. + <a href="qobject.html#connect">connect</a>(this, SIGNAL(<a href="qfiledialog.html#fileSelected">fileSelected</a>(const <a href="qstring.html">QString</a>&)), + this, SLOT(startMovie(const <a href="qstring.html">QString</a>&))); +} + + +void <a name="f259"></a>MovieStarter::startMovie(const <a href="qstring.html">QString</a>& filename) +{ + if ( filename ) // Start a new movie - have it delete when closed. + (new MoviePlayer( filename, QMovie(filename), 0, 0, + WDestructiveClose))->show(); +} + +<a name="x495"></a>void MovieStarter::<a href="qdialog.html#done">done</a>( int r ) +{ + if (r != Accepted) + qApp-><a href="qapplication.html#quit">quit</a>(); // end on Cancel + <a href="qdialog.html#setResult">setResult</a>( r ); + + // And don't hide. +} + + +int main(int argc, char **argv) +{ + <a href="qapplication.html">QApplication</a> a(argc, argv); + + if (argc > 1) { + // Commandline mode - show movies given on the command line + // + bool gui=TRUE; + for (int arg=1; arg<argc; arg++) { + if ( QString(argv[arg]) == "-i" ) + gui = !gui; + else if ( gui ) + (void)new MoviePlayer(argv[arg], QMovie(argv[arg]), 0, 0, + Qt::WDestructiveClose); + else + (void)new MovieScreen(argv[arg], QMovie(argv[arg]), 0, 0, + Qt::WDestructiveClose); + } + QObject::<a href="qobject.html#connect">connect</a>(qApp, SIGNAL(<a href="qapplication.html#lastWindowClosed">lastWindowClosed</a>()), qApp, SLOT(<a href="qapplication.html#quit">quit</a>())); + } else { + // "GUI" mode - open a chooser for movies + // + MovieStarter* fd = new MovieStarter("."); +<a name="x494"></a> fd-><a href="qdialog.html#show">show</a>(); + } + + // Go! + return a.<a href="qapplication.html#exec">exec</a>(); +} + +#include "main.moc" +</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> |