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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
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<a href="http://developer.apple.com/">ADC Home</a> > <a href="../../referencelibrary/index.html">Reference Library</a> > <a href="../../samplecode/index.html">Sample Code</a> > <a href="../../samplecode/QuickTime/index.html">QuickTime</a> > <a href="../../samplecode/QuickTime/idxWiredMoviesandSprites-date.html">Wired Movies and Sprites</a> > <A HREF="javascript:location.replace('index.html');">MovieSprites</A> >
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<td><h1><div id="pagehead">MovieSprites</div></h1></td>
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<h2>/Start Code/QTSprites.c</h2>
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<p><strong>View Source Code:</strong>
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<option value="listing1.html">/Application Files/ComApplication.c</option>
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<option value="listing4.html">/Clippings/AddKeyFrameSampleMedia.txt</option>
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<p><strong><a href="MovieSprites.zip">Download Sample</a></strong> (“MovieSprites.zip”, 2.08M)<BR>
<strong><a href="MovieSprites.dmg">Download Sample</a></strong> (“MovieSprites.dmg”, 2.72M)</p>
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<pre class="sourcecodebox">////////////// File: QTSprites.c//// Contains: QuickTime sprites support for QuickTime movies.//// Written by: ???// Revised by: Deeje Cooley and Tim Monroe// Based (heavily!) on the existing MakeSpriteMovie.c code written by ???.//// Copyright: © 1997-1998 by Apple Computer, Inc., all rights reserved.//// Change History (most recent first)://// <5> 03/17/00 rtm made changes to get things running under CarbonLib// <4> 09/30/98 rtm tweaked call to AddMovieResource to create single-fork movies// <3> 06/19/98 rtm moved to new routine names (e.g. SpriteMediaSetSpriteProperty)// <2> 04/09/98 rtm added sprite hit-testing// <1> 04/02/98 rtm first file; integrated existing code with shell framework// // This sample code creates a sprite movie containing one sprite track. The sprite track contains// a static background picture sprite (or just a colored background, depending on the value of the// global variable gUseBackgroundPicture) and three other sprites that change their properties over time.// The track's media contains only one key frame sample followed by many override samples. The key// frame contains all of the images used by the sprites; the override frames only contain the overrides// of the locations, image indices, and layers needed for the other sprites.//// This sample code also shows how to hit test sprites. It uses the function SpriteMediaHitTestAllSprites// to find mouse clicks on the sprites in the first sprite track in a movie. If the user clicks on a// sprite, we toggle the visibility state of the sprite. You would probably want to do something a bit// more interesting when the user clicks on a sprite.////////////////////////// header files////////////#include "QTSprites.h"////////////// global variables////////////Boolean gUseBackgroundPicture = true; // do we display a background picture?////////////// QTSprites_InitWindowData// Do any sprite-specific initialization for the specified window.////////////ApplicationDataHdl QTSprites_InitWindowData (WindowObject theWindowObject){ ApplicationDataHdl myAppData = NULL; Track myTrack = NULL; MediaHandler myHandler = NULL; myAppData = (ApplicationDataHdl)NewHandleClear(sizeof(ApplicationDataRecord)); if (myAppData != NULL) { myTrack = GetMovieIndTrackType((**theWindowObject).fMovie, 1, SpriteMediaType, movieTrackMediaType | movieTrackEnabledOnly); if (myTrack != NULL) myHandler = GetMediaHandler(GetTrackMedia(myTrack)); // remember the sprite media handler (**myAppData).fMovieHasSprites = (myTrack != NULL); (**myAppData).fSpriteHandler = myHandler; } return(myAppData);}////////////// QTSprites_DumpWindowData// Get rid of any window-specific data for the sprite media handler.////////////void QTSprites_DumpWindowData (WindowObject theWindowObject){ ApplicationDataHdl myAppData = NULL; myAppData = (ApplicationDataHdl)QTFrame_GetAppDataFromWindowObject(theWindowObject); if (myAppData != NULL) DisposeHandle((Handle)myAppData);}////////////// QTSprites_CreateSpritesMovie// Create a QuickTime movie containing a sprite track.////////////OSErr QTSprites_CreateSpritesMovie (void){ short myResRefNum = 0; short myResID = movieInDataForkResID; Movie myMovie = NULL; Track myTrack; Media myMedia; FSSpec myFile; Boolean myIsSelected = false; Boolean myIsReplacing = false; StringPtr myPrompt = QTUtils_ConvertCToPascalString(kSpriteSavePrompt); StringPtr myFileName = QTUtils_ConvertCToPascalString(kSpriteSaveMovieFileName); QTAtomContainer mySample = NULL; QTAtomContainer mySpriteData = NULL; RGBColor myKeyColor; Point myLocation, myIconLocation; short isVisible, myLayer, myIndex, i, myDelta, myIconMinH, myIconMaxH; long myFlags = createMovieFileDeleteCurFile | createMovieFileDontCreateResFile; OSErr myErr = noErr; ////////// // // create a new movie file // ////////// // prompt user for the destination file name QTFrame_PutFile(myPrompt, myFileName, &myFile, &myIsSelected, &myIsReplacing); if (!myIsSelected) goto bail;// Step 1.// Insert "CreateSpriteMovie.clp" here// Step 2.// Insert "CreateSpriteTrackAndMedia.clp" here // Step 3.// Insert "CreateKeyFrameSample.clp" here// Step 4.// Insert "AddSpritesToKeyFrameSample.clp" here // Step 5.// Insert "AddKeyFrameSampleMedia.clp" here// Step 6.// Insert "AddOverrideSamples.clp" here ////////// // // set the sprite track properties // ////////// if (!gUseBackgroundPicture) { QTAtomContainer myTrackProperties; RGBColor myBackgroundColor; // add a background color to the sprite track myBackgroundColor.red = EndianU16_NtoB(0x8000); myBackgroundColor.green = EndianU16_NtoB(0); myBackgroundColor.blue = EndianU16_NtoB(0xffff); QTNewAtomContainer(&myTrackProperties); QTInsertChild(myTrackProperties, 0, kSpriteTrackPropertyBackgroundColor, 1, 1, sizeof(RGBColor), &myBackgroundColor, NULL); myErr = SetMediaPropertyAtom(myMedia, myTrackProperties); if (myErr != noErr) goto bail; QTDisposeAtomContainer(myTrackProperties); } // Step 7.// Insert "AddMovieResource.clp" here bail: free(myPrompt); free(myFileName); if (mySample != NULL) QTDisposeAtomContainer(mySample); if (mySpriteData != NULL) QTDisposeAtomContainer(mySpriteData); if (myResRefNum != 0) CloseMovieFile(myResRefNum); if (myMovie != NULL) DisposeMovie(myMovie); return(myErr);}////////////// QTSprites_HitTestSprites// Determine whether a mouse click is on a sprite; return true if it is, false otherwise.//// This routine is intended to be called from your movie controller action filter function,// in response to mcActionMouseDown actions.////////////Boolean QTSprites_HitTestSprites (WindowObject theWindowObject, EventRecord *theEvent){ ApplicationDataHdl myAppData = NULL; MediaHandler myHandler = NULL; Boolean isHandled = false; long myFlags = 0L; QTAtomID myAtomID = 0; Point myPoint; ComponentResult myErr = noErr; myAppData = (ApplicationDataHdl)QTFrame_GetAppDataFromWindowObject(theWindowObject); if (myAppData == NULL) goto bail; if (theEvent == NULL) goto bail; myHandler = (**myAppData).fSpriteHandler; myFlags = spriteHitTestImage | spriteHitTestLocInDisplayCoordinates | spriteHitTestInvisibleSprites; myPoint = theEvent->where; myErr = SpriteMediaHitTestAllSprites(myHandler, myFlags, myPoint, &myAtomID); if ((myErr == noErr) && (myAtomID != 0)) { Boolean isVisible; // the user has clicked on a sprite; // for now, we'll just toggle the visibility state of the sprite SpriteMediaGetSpriteProperty(myHandler, myAtomID, kSpritePropertyVisible, (void *)&isVisible); SpriteMediaSetSpriteProperty(myHandler, myAtomID, kSpritePropertyVisible, (void *)!isVisible); isHandled = true; }bail: return(isHandled);}</pre>
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