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345 lines
14 KiB
345 lines
14 KiB
14 years ago
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/examples/movies/movies.doc:4 -->
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
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<title>Movies or the Story of the Animated GIF file</title>
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<style type="text/css"><!--
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fn { margin-left: 1cm; text-indent: -1cm; }
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a:link { color: #004faf; text-decoration: none }
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a:visited { color: #672967; text-decoration: none }
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body { background: #ffffff; color: black; }
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--></style>
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</head>
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<body>
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<table border="0" cellpadding="0" cellspacing="0" width="100%">
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<tr bgcolor="#E5E5E5">
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<td valign=center>
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<a href="index.html">
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<font color="#004faf">Home</font></a>
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| <a href="classes.html">
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<font color="#004faf">All Classes</font></a>
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| <a href="mainclasses.html">
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<font color="#004faf">Main Classes</font></a>
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| <a href="annotated.html">
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<font color="#004faf">Annotated</font></a>
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| <a href="groups.html">
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<font color="#004faf">Grouped Classes</font></a>
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| <a href="functions.html">
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<font color="#004faf">Functions</font></a>
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</td>
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<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>
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<p>
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The Movies example displays MNG and animated GIF files using the <a href="qmovie.html">QMovie</a> and
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<a href="qlabel.html">QLabel</a> classes.
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<p> The movies will only read an animated GIF if GIF reading was enabled when Qt was built.
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<p> <hr>
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<p> Main:
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<p> <pre>/****************************************************************************
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** $Id: qt/main.cpp 3.3.8 edited Jan 11 14:37 $
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**
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** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
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**
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** This file is part of an example program for Qt. This example
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** program may be used, distributed and modified without limitation.
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**
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*****************************************************************************/
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#include <<a href="qapplication-h.html">qapplication.h</a>>
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#include <<a href="qfiledialog-h.html">qfiledialog.h</a>>
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#include <<a href="qpushbutton-h.html">qpushbutton.h</a>>
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#include <<a href="qlabel-h.html">qlabel.h</a>>
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#include <<a href="qpainter-h.html">qpainter.h</a>>
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#include <<a href="qmessagebox-h.html">qmessagebox.h</a>>
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#include <<a href="qmovie-h.html">qmovie.h</a>>
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#include <<a href="qvbox-h.html">qvbox.h</a>>
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class MovieScreen : public <a href="qframe.html">QFrame</a> {
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<a href="metaobjects.html#Q_OBJECT">Q_OBJECT</a>
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<a href="qmovie.html">QMovie</a> movie;
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<a href="qstring.html">QString</a> filename;
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<a href="qsize.html">QSize</a> sh;
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public:
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MovieScreen(const char* fname, QMovie m, QWidget* p=0, const char* name=0, WFlags f=0) :
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<a href="qframe.html">QFrame</a>(p, name, f),
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sh(100,100)
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{
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setCaption(fname);
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filename = fname;
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movie = m;
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// Set a frame around the movie.
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setFrameStyle(QFrame::WinPanel|QFrame::Sunken);
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// No background needed, since we draw on the whole widget.
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<a name="x523"></a> movie.<a href="qwidget.html#setBackgroundColor">setBackgroundColor</a>(backgroundColor());
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setBackgroundMode(NoBackground);
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// Get the movie to tell use when interesting things happen.
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<a name="x500"></a> movie.<a href="qmovie.html#connectUpdate">connectUpdate</a>(this, SLOT(movieUpdated(const <a href="qrect.html">QRect</a>&)));
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<a name="x498"></a> movie.<a href="qmovie.html#connectResize">connectResize</a>(this, SLOT(movieResized(const <a href="qsize.html">QSize</a>&)));
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<a name="x499"></a> movie.<a href="qmovie.html#connectStatus">connectStatus</a>(this, SLOT(movieStatus(int)));
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setSizePolicy(QSizePolicy(QSizePolicy::Expanding,QSizePolicy::Expanding));
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}
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<a href="qsize.html">QSize</a> sizeHint() const
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{
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return sh;
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}
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protected:
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// Draw the contents of the QFrame - the movie and on-screen-display
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void drawContents(QPainter* p)
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{
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// Get the current movie frame.
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<a name="x502"></a> <a href="qpixmap.html">QPixmap</a> pm = movie.<a href="qmovie.html#framePixmap">framePixmap</a>();
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// Get the area we have to draw in.
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<a href="qrect.html">QRect</a> r = contentsRect();
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<a name="x511"></a> if ( !pm.<a href="qpixmap.html#isNull">isNull</a>() ) {
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// Only rescale is we need to - it can take CPU!
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<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>() ) {
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<a href="qwmatrix.html">QWMatrix</a> m;
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<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>(),
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<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>());
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<a name="x514"></a> pm = pm.<a href="qpixmap.html#xForm">xForm</a>(m);
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}
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// Draw the [possibly scaled] frame. movieUpdated() below calls
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// repaint with only the changed area, so clipping will ensure we
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// only do the minimum amount of rendering.
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//
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<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);
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}
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// The on-screen display
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const char* message = 0;
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<a name="x504"></a> if (movie.<a href="qmovie.html#paused">paused</a>()) {
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message = "PAUSED";
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<a name="x501"></a> } else if (movie.<a href="qmovie.html#finished">finished</a>()) {
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message = "THE END";
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<a name="x507"></a> } else if (movie.<a href="qmovie.html#steps">steps</a>() > 0) {
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message = "FF >>";
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}
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if (message) {
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// Find a good font size...
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p->setFont(QFont("Helvetica", 24));
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<a href="qfontmetrics.html">QFontMetrics</a> fm = p->fontMetrics();
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<a name="x496"></a> if ( fm.<a href="qfontmetrics.html#width">width</a>(message) > r.<a href="qrect.html#width">width</a>()-10 )
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p->setFont(QFont("Helvetica", 18));
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fm = p->fontMetrics();
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if ( fm.<a href="qfontmetrics.html#width">width</a>(message) > r.<a href="qrect.html#width">width</a>()-10 )
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p->setFont(QFont("Helvetica", 14));
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fm = p->fontMetrics();
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if ( fm.<a href="qfontmetrics.html#width">width</a>(message) > r.<a href="qrect.html#width">width</a>()-10 )
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p->setFont(QFont("Helvetica", 12));
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fm = p->fontMetrics();
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if ( fm.<a href="qfontmetrics.html#width">width</a>(message) > r.<a href="qrect.html#width">width</a>()-10 )
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p->setFont(QFont("Helvetica", 10));
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// "Shadow" effect.
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p->setPen(black);
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p->drawText(1, 1, width()-1, height()-1, AlignCenter, message);
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p->setPen(white);
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p->drawText(0, 0, width()-1, height()-1, AlignCenter, message);
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}
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}
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public slots:
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void restart()
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{
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<a name="x505"></a> movie.<a href="qmovie.html#restart">restart</a>();
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repaint();
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}
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void togglePause()
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{
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if ( movie.<a href="qmovie.html#paused">paused</a>() )
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<a name="x508"></a> movie.<a href="qmovie.html#unpause">unpause</a>();
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else
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<a name="x503"></a> movie.<a href="qmovie.html#pause">pause</a>();
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repaint();
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}
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void step()
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{
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<a name="x506"></a> movie.<a href="qmovie.html#step">step</a>();
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repaint();
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}
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void step10()
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{
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movie.<a href="qmovie.html#step">step</a>(10);
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repaint();
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}
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private slots:
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void movieUpdated(const <a href="qrect.html">QRect</a>& area)
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{
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if (!isVisible())
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show();
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// The given area of the movie has changed.
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<a href="qrect.html">QRect</a> r = contentsRect();
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if ( r.<a href="qrect.html#size">size</a>() != movie.<a href="qmovie.html#framePixmap">framePixmap</a>().size() ) {
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// Need to scale - redraw whole frame.
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repaint( r );
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} else {
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// Only redraw the changed area of the frame
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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>(),
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area.<a href="qrect.html#width">width</a>(), area.<a href="qrect.html#height">height</a>() );
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}
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}
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void movieResized(const <a href="qsize.html">QSize</a>& size)
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{
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// The movie changed size, probably from its initial zero size.
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int fw = frameWidth();
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<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 );
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<a href="qwidget.html#updateGeometry">updateGeometry</a>();
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if ( <a href="qwidget.html#parentWidget">parentWidget</a>() && parentWidget()->isHidden() )
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<a href="qwidget.html#parentWidget">parentWidget</a>()->show();
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}
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void movieStatus(int status)
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{
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// The movie has sent us a status message.
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if (status < 0) {
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<a href="qstring.html">QString</a> msg;
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msg.<a href="qstring.html#sprintf">sprintf</a>("Could not play movie \"%s\"", (const char*)filename);
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QMessageBox::<a href="qmessagebox.html#warning">warning</a>(this, "movies", msg);
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<a href="qwidget.html#parentWidget">parentWidget</a>()->close();
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} else if (status == QMovie::Paused || status == QMovie::EndOfMovie) {
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<a href="qwidget.html#repaint">repaint</a>(); // Ensure status text is displayed
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}
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}
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};
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class MoviePlayer : public <a href="qvbox.html">QVBox</a> {
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MovieScreen* movie;
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public:
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MoviePlayer(const char* fname, QMovie m, QWidget* p=0, const char* name=0, WFlags f=0) :
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<a href="qvbox.html">QVBox</a>(p,name,f)
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{
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movie = new MovieScreen(fname, m, this);
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<a href="qhbox.html">QHBox</a>* hb = new <a href="qhbox.html">QHBox</a>(this);
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<a href="qpushbutton.html">QPushButton</a>* btn;
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btn = new <a href="qpushbutton.html">QPushButton</a>("<<", hb);
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<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>()));
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btn = new <a href="qpushbutton.html">QPushButton</a>("||", hb);
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<a href="qobject.html#connect">connect</a>(btn, SIGNAL(<a href="qbutton.html#clicked">clicked</a>()), movie, SLOT(togglePause()));
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btn = new <a href="qpushbutton.html">QPushButton</a>(">|", hb);
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<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>()));
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btn = new <a href="qpushbutton.html">QPushButton</a>(">>|", hb);
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<a href="qobject.html#connect">connect</a>(btn, SIGNAL(<a href="qbutton.html#clicked">clicked</a>()), movie, SLOT(step10()));
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}
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};
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// A QFileDialog that chooses movies.
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//
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class MovieStarter: public <a href="qfiledialog.html">QFileDialog</a> {
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Q_OBJECT
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public:
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MovieStarter(const char *dir);
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public slots:
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void startMovie(const <a href="qstring.html">QString</a>& filename);
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// QDialog's method - normally closes the file dialog.
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// We want it left open, and we want Cancel to quit everything.
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void done( int r );
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};
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<a name="f258"></a>MovieStarter::MovieStarter(const char *dir)
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: <a href="qfiledialog.html">QFileDialog</a>(dir, "*.gif *.mng")
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{
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//behave as in getOpenFilename
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<a href="qfiledialog.html#setMode">setMode</a>( ExistingFile );
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// When a file is selected, show it as a movie.
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<a href="qobject.html#connect">connect</a>(this, SIGNAL(<a href="qfiledialog.html#fileSelected">fileSelected</a>(const <a href="qstring.html">QString</a>&)),
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this, SLOT(startMovie(const <a href="qstring.html">QString</a>&)));
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}
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void <a name="f259"></a>MovieStarter::startMovie(const <a href="qstring.html">QString</a>& filename)
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{
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if ( filename ) // Start a new movie - have it delete when closed.
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(new MoviePlayer( filename, QMovie(filename), 0, 0,
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WDestructiveClose))->show();
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}
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<a name="x495"></a>void MovieStarter::<a href="qdialog.html#done">done</a>( int r )
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{
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if (r != Accepted)
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qApp-><a href="qapplication.html#quit">quit</a>(); // end on Cancel
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<a href="qdialog.html#setResult">setResult</a>( r );
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// And don't hide.
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}
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int main(int argc, char **argv)
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{
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<a href="qapplication.html">QApplication</a> a(argc, argv);
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if (argc > 1) {
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|
|
// 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>
|