movies-example.html
来自「QT 下载资料仅供参考」· HTML 代码 · 共 344 行
HTML
344 行
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><!-- /home/reggie/tmp/qt-3.0-reggie-5401/qt-x11-commercial-3.0.5/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"><!--h3.fn,span.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 animated GIF files using the <a href="qmovie.html">QMovie</a> and<a href="qlabel.html">QLabel</a> classes.<p> <hr><p> Main:<p> <pre>/****************************************************************************** $Id: qt/main.cpp 3.0.5 edited Dec 18 2001 $**** 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 <<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="x474"></a> movie.<a href="qwidget.html#setBackgroundColor">setBackgroundColor</a>(backgroundColor()); setBackgroundMode(NoBackground); // Get the movie to tell use when interesting things happen.<a name="x451"></a> movie.<a href="qmovie.html#connectUpdate">connectUpdate</a>(this, SLOT(movieUpdated(const <a href="qrect.html">QRect</a>&)));<a name="x449"></a> movie.<a href="qmovie.html#connectResize">connectResize</a>(this, SLOT(movieResized(const <a href="qsize.html">QSize</a>&)));<a name="x450"></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="x453"></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="x462"></a> if ( !pm.<a href="qpixmap.html#isNull">isNull</a>() ) { // Only rescale is we need to - it can take CPU!<a name="x467"></a><a name="x463"></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="x475"></a><a name="x468"></a><a name="x464"></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="x466"></a><a name="x461"></a> (double)r.<a href="qrect.html#height">height</a>()/pm.<a href="qpixmap.html#height">height</a>());<a name="x465"></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="x470"></a><a name="x469"></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="x455"></a> if (movie.<a href="qmovie.html#paused">paused</a>()) { message = "PAUSED";<a name="x452"></a> } else if (movie.<a href="qmovie.html#finished">finished</a>()) { message = "THE END";<a name="x458"></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="x447"></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="x456"></a> movie.<a href="qmovie.html#restart">restart</a>(); repaint(); } void togglePause() { if ( movie.<a href="qmovie.html#paused">paused</a>() )<a name="x459"></a> movie.<a href="qmovie.html#unpause">unpause</a>(); else<a name="x454"></a> movie.<a href="qmovie.html#pause">pause</a>(); repaint(); } void step() {<a name="x457"></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="x472"></a><a name="x471"></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_OBJECTpublic: 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="f216"></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="f217"></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="x446"></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="x445"></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 © 2002 <a href="http://www.trolltech.com">Trolltech</a><td><a href="http://www.trolltech.com/trademarks.html">Trademarks</a><td align=right><div align=right>Qt version 3.0.5</div></table></div></address></body></html>⌨️ 快捷键说明
复制代码Ctrl + C
搜索代码Ctrl + F
全屏模式F11
增大字号Ctrl + =
减小字号Ctrl + -
显示快捷键?