Wired Movies and Sprites

Adding a Series of Actions to the Penguins

The following code fragment in Listing 3-18 shows how you can add a key frame with four buttons, enabling our penguins to move through a series of actions.

Listing 18 Adding a key frame with four buttons, enabling a series of actions for our two penguins



 
// add actions to the six sprites

    // add go to beginning button

    myErr = QTCopyAtom(myBeginButton, kParentAtomIsContainer, 

                        &myBeginActionButton);

    if (myErr != noErr)

        goto bail;



    AddSpriteSetImageIndexAction(myBeginActionButton, 

                    kParentAtomIsContainer, kQTEventMouseClick, 0, NULL, 

                    0, 0, NULL, kGoToBeginningButtonDownIndex, NULL);

    AddSpriteSetImageIndexAction(myBeginActionButton, 

                    kParentAtomIsContainer, kQTEventMouseClickEnd, 0, 

                    NULL, 0, 0, NULL, kGoToBeginningButtonUpIndex, NULL);

    AddSpriteToSample(mySample, myPrevActionButton, kGoToPrevSpriteID);

                        NULL);

    AddSpriteToSample(mySample, myNextActionButton, kGoToNextSpriteID);

    QTDisposeAtomContainer(myNextActionButton);

. . . 

    // add go to end button

    myErr = QTCopyAtom(myEndButton, kParentAtomIsContainer, 

                        &myEndActionButton);

    if (myErr != noErr)

        goto bail;

        kParentAtomIsContainer, kQTEventMouseExit, 0, NULL, 0, 0, NULL, 

            false, 

. . . 



    // add penguin one

    myErr = QTCopyAtom(myPenguinOne, kParentAtomIsContainer, 

                        &myPenguinOneAction);

    if (myErr != noErr)



 
    AddSpriteSetVisibleAction(myBeginActionButton, goto bail;



    // show the buttons on mouse enter and hide them on mouse exit

    AddSpriteSetVisibleAction(myPenguinOneAction, kParentAtomIsContainer, 

                                kQTEventMouseEnter, 0, NULL, 0, 

                                kTargetSpriteID, (void 

                                *)kGoToBeginningSpriteID, true, NULL);

    AddSpriteSetVisibleAction(myPenguinOneAction, kParentAtomIsContainer, 

                                kQTEventMouseExit, 0, NULL, 0, 

                                kTargetSpriteID, (void 

                                *)kGoToBeginningSpriteID, false, NULL);

. . . 

    // add penguin two

    myErr = QTCopyAtom(myPenguinTwo, kParentAtomIsContainer, 

                        &myPenguinTwoAction);

    if (myErr != noErr)

        goto bail;



    // blink when clicked on

    AddSpriteSetImageIndexAction(myPenguinTwoAction, 

                                kParentAtomIsContainer, 

                                kQTEventMouseClick, 0, NULL, 0, 0, NULL, 

                                kPenguinClosedIndex, NULL);

. . . 

    // add go to next button

    myErr = QTCopyAtom(myNextButton, kParentAtomIsContainer, 

                        &myNextActionButton);

    if (myErr != noErr)

        goto bail;