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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 >
< p >
The Movies example displays MNG and animated GIF files using the < a href = "tqmovie.html" > TQMovie< / a > and
< a href = "tqlabel.html" > TQLabel< / a > classes.
< p > The movies will only read an animated GIF if GIF reading was enabled when TQt 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 TQt. This example
** program may be used, distributed and modified without limitation.
**
*****************************************************************************/
#include < < a href = "qapplication-h.html" > ntqapplication.h< / a > >
#include < < a href = "tqfiledialog-h.html" > tqfiledialog.h< / a > >
#include < < a href = "tqpushbutton-h.html" > tqpushbutton.h< / a > >
#include < < a href = "tqlabel-h.html" > tqlabel.h< / a > >
#include < < a href = "tqpainter-h.html" > tqpainter.h< / a > >
#include < < a href = "qmessagebox-h.html" > ntqmessagebox.h< / a > >
#include < < a href = "tqmovie-h.html" > tqmovie.h< / a > >
#include < < a href = "tqvbox-h.html" > tqvbox.h< / a > >
class MovieScreen : public < a href = "tqframe.html" > TQFrame< / a > {
< a href = "metaobjects.html#TQ_OBJECT" > TQ_OBJECT< / a >
< a href = "tqmovie.html" > TQMovie< / a > movie;
< a href = "tqstring.html" > TQString< / a > filename;
< a href = "tqsize.html" > TQSize< / a > sh;
public:
MovieScreen(const char* fname, TQMovie m, TQWidget* p=0, const char* name=0, WFlags f=0) :
< a href = "tqframe.html" > TQFrame< / a > (p, name, f),
sh(100,100)
{
setCaption(fname);
filename = fname;
movie = m;
// Set a frame around the movie.
setFrameStyle(TQFrame::WinPanel|TQFrame::Sunken);
// No background needed, since we draw on the whole widget.
< a name = "x523" > < / a > movie.< a href = "tqwidget.html#setBackgroundColor" > setBackgroundColor< / a > (backgroundColor());
setBackgroundMode(NoBackground);
// Get the movie to tell use when interesting things happen.
< a name = "x500" > < / a > movie.< a href = "tqmovie.html#connectUpdate" > connectUpdate< / a > (this, TQ_SLOT(movieUpdated(const < a href = "tqrect.html" > TQRect< / a > & )));
< a name = "x498" > < / a > movie.< a href = "tqmovie.html#connectResize" > connectResize< / a > (this, TQ_SLOT(movieResized(const < a href = "tqsize.html" > TQSize< / a > & )));
< a name = "x499" > < / a > movie.< a href = "tqmovie.html#connectStatus" > connectStatus< / a > (this, TQ_SLOT(movieStatus(int)));
setSizePolicy(TQSizePolicy(TQSizePolicy::Expanding,TQSizePolicy::Expanding));
}
< a href = "tqsize.html" > TQSize< / a > sizeHint() const
{
return sh;
}
protected:
// Draw the contents of the TQFrame - the movie and on-screen-display
void drawContents(TQPainter* p)
{
// Get the current movie frame.
< a name = "x502" > < / a > < a href = "tqpixmap.html" > TQPixmap< / a > pm = movie.< a href = "tqmovie.html#framePixmap" > framePixmap< / a > ();
// Get the area we have to draw in.
< a href = "tqrect.html" > TQRect< / a > r = contentsRect();
< a name = "x511" > < / a > if ( !pm.< a href = "tqpixmap.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 = "tqrect.html#size" > size< / a > () != pm.< a href = "tqpixmap.html#size" > size< / a > () ) {
< a href = "tqwmatrix.html" > TQWMatrix< / a > m;
< a name = "x524" > < / a > < a name = "x517" > < / a > < a name = "x513" > < / a > m.< a href = "tqwmatrix.html#scale" > scale< / a > ((double)r.< a href = "tqrect.html#width" > width< / a > ()/pm.< a href = "tqpixmap.html#width" > width< / a > (),
< a name = "x515" > < / a > < a name = "x510" > < / a > (double)r.< a href = "tqrect.html#height" > height< / a > ()/pm.< a href = "tqpixmap.html#height" > height< / a > ());
< a name = "x514" > < / a > pm = pm.< a href = "tqpixmap.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 = "tqrect.html#x" > x< / a > (), r.< a href = "tqrect.html#y" > y< / a > (), pm);
}
// The on-screen display
const char* message = 0;
< a name = "x504" > < / a > if (movie.< a href = "tqmovie.html#paused" > paused< / a > ()) {
message = "PAUSED";
< a name = "x501" > < / a > } else if (movie.< a href = "tqmovie.html#finished" > finished< / a > ()) {
message = "THE END";
< a name = "x507" > < / a > } else if (movie.< a href = "tqmovie.html#steps" > steps< / a > () > 0) {
message = "FF > > ";
}
if (message) {
// Find a good font size...
p-> setFont(TQFont("Helvetica", 24));
< a href = "tqfontmetrics.html" > TQFontMetrics< / a > fm = p-> fontMetrics();
< a name = "x496" > < / a > if ( fm.< a href = "tqfontmetrics.html#width" > width< / a > (message) > r.< a href = "tqrect.html#width" > width< / a > ()-10 )
p-> setFont(TQFont("Helvetica", 18));
fm = p-> fontMetrics();
if ( fm.< a href = "tqfontmetrics.html#width" > width< / a > (message) > r.< a href = "tqrect.html#width" > width< / a > ()-10 )
p-> setFont(TQFont("Helvetica", 14));
fm = p-> fontMetrics();
if ( fm.< a href = "tqfontmetrics.html#width" > width< / a > (message) > r.< a href = "tqrect.html#width" > width< / a > ()-10 )
p-> setFont(TQFont("Helvetica", 12));
fm = p-> fontMetrics();
if ( fm.< a href = "tqfontmetrics.html#width" > width< / a > (message) > r.< a href = "tqrect.html#width" > width< / a > ()-10 )
p-> setFont(TQFont("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 = "tqmovie.html#restart" > restart< / a > ();
repaint();
}
void togglePause()
{
if ( movie.< a href = "tqmovie.html#paused" > paused< / a > () )
< a name = "x508" > < / a > movie.< a href = "tqmovie.html#unpause" > unpause< / a > ();
else
< a name = "x503" > < / a > movie.< a href = "tqmovie.html#pause" > pause< / a > ();
repaint();
}
void step()
{
< a name = "x506" > < / a > movie.< a href = "tqmovie.html#step" > step< / a > ();
repaint();
}
void step10()
{
movie.< a href = "tqmovie.html#step" > step< / a > (10);
repaint();
}
private slots:
void movieUpdated(const < a href = "tqrect.html" > TQRect< / a > & area)
{
if (!isVisible())
show();
// The given area of the movie has changed.
< a href = "tqrect.html" > TQRect< / a > r = contentsRect();
if ( r.< a href = "tqrect.html#size" > size< / a > () != movie.< a href = "tqmovie.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 = "tqrect.html#x" > x< / a > ()+r.< a href = "tqrect.html#x" > x< / a > (), area.< a href = "tqrect.html#y" > y< / a > ()+r.< a href = "tqrect.html#x" > x< / a > (),
area.< a href = "tqrect.html#width" > width< / a > (), area.< a href = "tqrect.html#height" > height< / a > () );
}
}
void movieResized(const < a href = "tqsize.html" > TQSize< / a > & size)
{
// The movie changed size, probably from its initial zero size.
int fw = frameWidth();
< a name = "x521" > < / a > < a name = "x520" > < / a > sh = TQSize( size.< a href = "tqsize.html#width" > width< / a > () + fw*2, size.< a href = "tqsize.html#height" > height< / a > () + fw*2 );
< a href = "tqwidget.html#updateGeometry" > updateGeometry< / a > ();
if ( < a href = "tqwidget.html#parentWidget" > parentWidget< / a > () & & parentWidget()-> isHidden() )
< a href = "tqwidget.html#parentWidget" > parentWidget< / a > ()-> show();
}
void movieStatus(int status)
{
// The movie has sent us a status message.
if (status < 0) {
< a href = "tqstring.html" > TQString< / a > msg;
msg.< a href = "tqstring.html#sprintf" > sprintf< / a > ("Could not play movie \"%s\"", (const char*)filename);
TQMessageBox::< a href = "ntqmessagebox.html#warning" > warning< / a > (this, "movies", msg);
< a href = "tqwidget.html#parentWidget" > parentWidget< / a > ()-> close();
} else if (status == TQMovie::Paused || status == TQMovie::EndOfMovie) {
< a href = "tqwidget.html#repaint" > repaint< / a > (); // Ensure status text is displayed
}
}
};
class MoviePlayer : public < a href = "tqvbox.html" > TQVBox< / a > {
MovieScreen* movie;
public:
MoviePlayer(const char* fname, TQMovie m, TQWidget* p=0, const char* name=0, WFlags f=0) :
< a href = "tqvbox.html" > TQVBox< / a > (p,name,f)
{
movie = new MovieScreen(fname, m, this);
< a href = "tqhbox.html" > TQHBox< / a > * hb = new < a href = "tqhbox.html" > TQHBox< / a > (this);
< a href = "tqpushbutton.html" > TQPushButton< / a > * btn;
btn = new < a href = "tqpushbutton.html" > TQPushButton< / a > ("< < ", hb);
< a href = "tqobject.html#connect" > connect< / a > (btn, TQ_SIGNAL(< a href = "tqbutton.html#clicked" > clicked< / a > ()), movie, TQ_SLOT(< a href = "tqmovie.html#restart" > restart< / a > ()));
btn = new < a href = "tqpushbutton.html" > TQPushButton< / a > ("||", hb);
< a href = "tqobject.html#connect" > connect< / a > (btn, TQ_SIGNAL(< a href = "tqbutton.html#clicked" > clicked< / a > ()), movie, TQ_SLOT(togglePause()));
btn = new < a href = "tqpushbutton.html" > TQPushButton< / a > ("> |", hb);
< a href = "tqobject.html#connect" > connect< / a > (btn, TQ_SIGNAL(< a href = "tqbutton.html#clicked" > clicked< / a > ()), movie, TQ_SLOT(< a href = "tqmovie.html#step" > step< / a > ()));
btn = new < a href = "tqpushbutton.html" > TQPushButton< / a > ("> > |", hb);
< a href = "tqobject.html#connect" > connect< / a > (btn, TQ_SIGNAL(< a href = "tqbutton.html#clicked" > clicked< / a > ()), movie, TQ_SLOT(step10()));
}
};
// A TQFileDialog that chooses movies.
//
class MovieStarter: public < a href = "tqfiledialog.html" > TQFileDialog< / a > {
TQ_OBJECT
public:
MovieStarter(const char *dir);
public slots:
void startMovie(const < a href = "tqstring.html" > TQString< / a > & filename);
// TQDialog'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 = "tqfiledialog.html" > TQFileDialog< / a > (dir, "*.gif *.mng")
{
//behave as in getOpenFilename
< a href = "tqfiledialog.html#setMode" > setMode< / a > ( ExistingFile );
// When a file is selected, show it as a movie.
< a href = "tqobject.html#connect" > connect< / a > (this, TQ_SIGNAL(< a href = "tqfiledialog.html#fileSelected" > fileSelected< / a > (const < a href = "tqstring.html" > TQString< / a > & )),
this, TQ_SLOT(startMovie(const < a href = "tqstring.html" > TQString< / a > & )));
}
void < a name = "f259" > < / a > MovieStarter::startMovie(const < a href = "tqstring.html" > TQString< / a > & filename)
{
if ( filename ) // Start a new movie - have it delete when closed.
(new MoviePlayer( filename, TQMovie(filename), 0, 0,
WDestructiveClose))-> show();
}
< a name = "x495" > < / a > void MovieStarter::< a href = "tqdialog.html#done" > done< / a > ( int r )
{
if (r != Accepted)
tqApp-> < a href = "ntqapplication.html#quit" > quit< / a > (); // end on Cancel
< a href = "tqdialog.html#setResult" > setResult< / a > ( r );
// And don't hide.
}
int main(int argc, char **argv)
{
< a href = "ntqapplication.html" > TQApplication< / 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 ( TQString(argv[arg]) == "-i" )
gui = !gui;
else if ( gui )
(void)new MoviePlayer(argv[arg], TQMovie(argv[arg]), 0, 0,
TQt::WDestructiveClose);
else
(void)new MovieScreen(argv[arg], TQMovie(argv[arg]), 0, 0,
TQt::WDestructiveClose);
}
TQObject::< a href = "tqobject.html#connect" > connect< / a > (tqApp, TQ_SIGNAL(< a href = "ntqapplication.html#lastWindowClosed" > lastWindowClosed< / a > ()), tqApp, TQ_SLOT(< a href = "ntqapplication.html#quit" > quit< / a > ()));
} else {
// "GUI" mode - open a chooser for movies
//
MovieStarter* fd = new MovieStarter(".");
< a name = "x494" > < / a > fd-> < a href = "tqdialog.html#show" > show< / a > ();
}
// Go!
return a.< a href = "ntqapplication.html#exec" > exec< / a > ();
}
#include "main.moc"
< / pre >
< p > See also < a href = "examples.html" > Examples< / a > .
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