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 Datatypes:
 animation.datatype
  animation.datatype
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Docs » Autodocs » animation.datatype » animation.datatype

NAME

        animation.datatype -- root data type for animations.

FUNCTION

        The animation.datatype is the super-class for any animation related
classes.
This class is responsible for creating the controls, scaling,
remapping and synchronization.

METHODS

        OM_NEW -- Create a new animation object.
OM_GET -- Obtain the value of an attribute.
OM_SET -- Set the values of multiple attributes.
OM_UPDATE -- Update the values of multiple attributes.
OM_DISPOSE -- Dispose of a animation object.
GM_LAYOUT -- Layout the object and notify the application of the
title and size.
GM_HITTEST -- Determine if the object has been hit with the
mouse.
GM_GOACTIVE -- Tell the object to go active. On SELECTDOWN, the
animation will start playing.
GM_HANDLEINPUT -- Handle input. Currently input (other than
SELECTDOWN) doesn't affect the animation.
GM_RENDER -- Cause the current frame to render.
DTM_FRAMEBOX -- Obtain the display environment that the animation
requires.
DTM_TRIGGER -- Cause an event to occur. Currently the only
trigger event is STM_PLAY, which will cause the animation to
start playing.
DTM_COPY -- Copy the current frame to the clipboard as an IFF ILBM.
DTM_WRITE -- Write the current frame to a file as an IFF ILBM.
DTM_PRINT -- Print the current frame.
ADTM_LOADFRAME -- Load a frame of the animation.
ADTM_UNLOADFRAME -- Deallocate any memory allocated by
ADTM_LOADFRAME.
ADTM_START -- Start the animation. This MUST be passed to the
super-class AFTER the sub-class has started.
ADTM_PAUSE -- Pause the animation. This MUST be passed to the
super-class BEFORE the sub-class pauses.
ADTM_STOP -- Stop the animation. This MUST be passed to the
super-class BEFORE the sub-class stops.
ADTM_LOCATE -- Used to locate a frame of the animation.
ADTM_LOADNEWFORMATFRAME -- Load a new format frame of the animation,
for more information, see <datatypes/animationclass.h>. (V44)
ADTM_UNLOADNEWFORMATFRAME -- Deallocate any memory allocated by
ADTM_LOADNEWFORMATFRAME. (V44)

TAGS

        DTA_ControlPanel (BOOL) -- Determine whether the control
panel is shown. Defaults to TRUE.
Applicability is (I).
DTA_Immediate (BOOL) -- Indicate whether the animation
should immediately begin playing. Defaults to
FALSE.
Applicability is (I).
DTA_Repeat (BOOL) -- Indicate whether the animation
should loop. (V44)
Default for this tag is FALSE. Applicability is (IS).
ADTA_Remap (BOOL) -- Indicate whether the animation should be
remapped or not.
Applicability is (I).
ADTA_ModeID (ULONG) -- Set and get the graphic mode id of the
picture.
Applicability is (ISG).
ADTA_Width (ULONG) -- Width of a frame in pixels.
Applicability is (IG).
ADTA_Height (ULONG) -- Height of a frame in pixels.
Applicability is (IG).
ADTA_Depth (ULONG) -- Depth of the frame.
Applicability is (IG).
ADTA_Frames (ULONG) -- Number of frames in animation.
Applicability is (ISG).
ADTA_KeyFrame (struct BitMap *) -- Pointer to the key
frame.
Applicability is (ISG).
ADTA_FramesPerSecond (ULONG) -- Number of frames per
second to play.
ADTA_NumColors (WORD) -- Number of colors used by the frame.
Applicability is (ISG).
ADTA_ColorRegisters (struct ColorRegister *) -- Color table; its
contents should match the colours in the ADTA_CRegs table.
Applicability is (G).
ADTA_CRegs (ULONG *) -- Color table to use with SetRGB32CM().
Applicability is (G).
ADTA_GRegs (ULONG *) -- Color table; this table is initialized
during the layout process and will contain the colours the
picture will use after remapping. If no remapping takes
place, these colours will match those in the ADTA_CRegs table.
ADTA_ColorTable (UBYTE *) -- Shared pen table; this table is
initialized during the layout process while the frames
are being remapped.
Applicability is (G).
ADTA_ColorTable2 (UBYTE *) -- Shared pen table; in most places
this table will be identical to the ADTA_ColorTable table.
Some of the colours in this table might match the original
colour palette a little better than the colours picked for
the other table. The animation.datatype uses the two tables
during remapping, alternating for each pixel.
Applicability is (G).
ADTA_Allocated (ULONG) -- OBSOLETE; DO NOT USE.
Applicability is (G).
ADTA_NumAlloc (UWORD) -- Number of colors allocated by the frame.
In this context `allocated' refers to colours allocated via
graphics.library/ObtainBestPenA.
Applicability is (G).
ADTA_BitMapHeader (struct BitMapHeader *) -- Set and get the
base information for the animation. BitMapHeader is defined in
<datatypes/pictureclass.h>
Applicability is (G).
ADTA_Sample (BYTE *) -- Pointer to sample data.
NOTE: this tag was only (IS) in V40; this has been fixed
in V44.
Applicability is (ISG).
ADTA_SampleLength (ULONG) -- Length of sample data.
Applicability is (ISG).
ADTA_Period (ULONG) -- Period to play back sample at.
Applicability is (ISG).
ADTA_Volume (ULONG) -- Volume to play back sample at (0..64).
Applicability is (ISG).
OBP_Precision (ULONG) -- Precision to use when obtaining colors.
See the PRECISION_[..] defines in <graphics/view.h>.
Applicability is (I). Defaults to PRECISION_IMAGE. (V44)
ADTA_LeftSample (BYTE *) -- Pointer to left channel sample
data. (V44)
Applicability is (ISG).
ADTA_RightSample (BYTE *) -- Pointer to right channel sample
data. (V44)
Applicability is (ISG).
ADTA_SamplesPerSec (ULONG) -- Number of samples per second to play;
if this is > 0, it takes precendence over ADTA_Period.
Applicability is (ISG).
ADTA_PreloadFrameCount (ULONG) -- Number of frames to preload. (V44)
Frames are preloaded when starting animation playback. The
loader will attempt to keep at least this number of frames
available for the display process. Note that when changing this
attribute the change does not take effect immediately.
Default for this tag is 10. Applicability is (ISG).

NOTES

        The ADTM_LOADNEWFORMATFRAME and ADTM_UNLOADNEWFORMATFRAME methods
operate on struct adtNewFormatFrame format messages. The
adtNewFormatFrame message is an extension of the adtFrame message
with additional fields, such as required for stereo sound playback.
By default, animation.datatype will load and unload frames allocated
by its subclasses using the compatible ADTM_LOADFRAME and
ADTM_UNLOADFRAME methods. If your subclass needs to use the extended
adtNewFormatFrame format messages, it must say so by providing a
list of supported methods for animation.datatype to query through
the OM_GET/DTA_Methods tag. If both ADTM_LOADNEWFORMATFRAME and
ADTM_UNLOADNEWFORMATFRAME are among the methods supported by your
subclass, you will receive adtNewFormatFrame format messages instead
of the compatible adtFrame messages.
Please note that applications such as MultiView will query the
methods supported by your class. Make sure that if you choose to
implement support for the OM_GET/DTA_Methods tag the methods you
return should also include the methods supported by your superclass.
Otherwise, the user will be unable to use functions such as "Copy"
or "Print".
Since the adtNewFormatFrame message format may be enhanced in future
releases of animation.datatype, your subclass may access only
structure members that are known to exist in the message. To find
out which members are available, check the
adtNewFormatFrame->alf_Size member; it contains the total length of
the data structure (in bytes). Remember which message length you
require, then act accordingly. Please keep in mind that the
structure member adtNewFormatFrame->alf_Size does not exist in the
compatible adtFrame message data structure.

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