Programming with QuickTime VR

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QTVRMouseStillDown

You can use the QTVRMouseStillDown function to handle the user's holding down the mouse button while the cursor is in a QuickTime VR movie for which mouse-down tracking is disabled.

OSErr QTVRMouseStillDown (
                     QTVRInstanceqtvr,
                     Pointpt,
                     UInt32*hotSpotID,
                     WindowPtr w);
qtvr
An instance of a QuickTime VR movie.
pt
The current location of the cursor, in the local coordinates of the graphics world specified by the w parameter.
hotSpotID
On entry, a pointer to a long integer. On exit, that long integer contains the ID of the hot spot that lies beneath the specified point, or the value 0 if no hot spot lies beneath that point.
w
A pointer to a graphics world.
function result
A result code.

DESCRIPTION

The QTVRMouseStillDown function returns, in the long integer pointed to by the hotSpotID parameter, the ID of the hot spot in the QuickTime VR movie specified by the qtvr parameter that lies directly under the point specified by the pt parameter. If no hot spot lies under that point, the long integer is set to 0. QTVRMouseStillDown also performs any other tasks that are typically performed when the user holds down the mouse button when the cursor is in a QuickTime VR movie.

You should call QTVRMouseStillDown repeatedly for as long as the user holds down the mouse button while the cursor is in the specified QuickTime VR movie.

SPECIAL CONSIDERATIONS

You need to call QTVRMouseStillDown only if you have disabled mouse-down tracking for the specified QuickTime VR movie.

SEE ALSO

Use QTVRSetMouseDownTracking (link) to change the mouse-down tracking state of a QuickTime VR movie. Use QTVRMouseDown (link) and QTVRMouseUp (next) to handle the mouse button's being clicked and released.

© 1997 Apple Computer, Inc.

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