TQSound Class Reference

The TQSound class provides access to the platform audio facilities. More...

#include <qsound.h>

Inherits TQObject.

List of all member functions.

Public Members

TQSound ( const TQString & filename, TQObject * parent = 0, const char * name = 0 )
~TQSound ()
int loops () const
int loopsRemaining () const
void setLoops ( int l )
TQString fileName () const
bool isFinished () const

Public Slots

void play ()
void stop ()

Static Public Members

bool isAvailable ()
void play ( const TQString & filename )
bool available ()

Detailed Description

The TQSound class provides access to the platform audio facilities.

TQt provides the most commonly retquired audio operation in GUI applications: asynchronously playing a sound file. This is most easily accomplished with a single call:

        TQSound::play("mysounds/bells.wav");

A second API is provided in which a TQSound object is created from a sound file and is played later:

        TQSound bells("mysounds/bells.wav");

        bells.play();

Sounds played using the second model may use more memory but play more immediately than sounds played using the first model, depending on the underlying platform audio facilities.

On Microsoft Windows the underlying multimedia system is used; only WAVE format sound files are supported.

On X11 the Network Audio System is used if available, otherwise all operations work silently. NAS supports WAVE and AU files.

On Macintosh, ironically, we use QT (QuickTime) for sound, this means all QuickTime formats are supported by TQt/Mac.

On TQt/Embedded, a built-in mixing sound server is used, which accesses /dev/dsp directly. Only the WAVE format is supported.

The availability of sound can be tested with TQSound::isAvailable().

Member Function Documentation

TQSound::TQSound ( const TQString & filename, TQObject * parent = 0, const char * name = 0 )

Constructs a TQSound that can tquickly play the sound in a file named filename.

This may use more memory than the static play function.

The parent and name arguments (default 0) are passed on to the TQObject constructor.

TQSound::~TQSound ()

Destroys the sound object. If the sound is not finished playing stop() is called on it.

bool TQSound::available () `[static]`

Returns TRUE if sound support is available; otherwise returns FALSE.

TQString TQSound::fileName () const

Returns the filename associated with the sound.

bool TQSound::isAvailable () `[static]`

Returns TRUE if sound facilities exist on the platform; otherwise returns FALSE. An application may choose either to notify the user if sound is crucial to the application or to operate silently without bothering the user.

If no sound is available, all TQSound operations work silently and tquickly.

bool TQSound::isFinished () const

Returns TRUE if the sound has finished playing; otherwise returns FALSE.

Warning: On Windows this function always returns TRUE for unlooped sounds.

int TQSound::loops () const

Returns the number of times the sound will play.

int TQSound::loopsRemaining () const

Returns the number of times the sound will loop. This value decreases each time the sound loops.

void TQSound::play ( const TQString & filename ) `[static]`

Plays the sound in a file called filename.

Example: sound/sound.cpp.

void TQSound::play () `[slot]`

This is an overloaded member function, provided for convenience. It behaves essentially like the above function.

Starts the sound playing. The function returns immediately. Depending on the platform audio facilities, other sounds may stop or may be mixed with the new sound.

The sound can be played again at any time, possibly mixing or replacing previous plays of the sound.

void TQSound::setLoops ( int l )

Sets the sound to repeat l times when it is played. Passing the value -1 will cause the sound to loop indefinitely.

void TQSound::stop () `[slot]`

Stops the sound playing.

On Windows the current loop will finish if a sound is played in a loop.