com!online 2002 July/com!online0702.iso/software/livemotion/DATA1.CAB/Scripting_Resources/Samples/Automation_Scripts/Event Handlers.js

Text File | 2002-05-13 | 5.1 KB | 136 lines

//////////////////////////////////////////////////
//
// ADOBE SYSTEMS INCORPORATED
// Copyright 2002 Adobe Systems Incorporated
// All Rights Reserved
//
// NOTICE:  Adobe permits you to use, modify, and
// distribute this file in accordance with the terms
// of the Adobe license agreement accompanying it.
// If you have received this file from a source
// other than Adobe, then your use, modification,
// or distribution of it requires the prior
// written permission of Adobe.
//
//////////////////////////////////////////////////

//////////////////////////////////////////////////
//
// Event Handlers.js
//
// DESCRIPTION
//
// This script shows how to add script to the event handlers
// in the player script. This allows you to write event based
// script in your programs.
//
// HOW TO USE
//
// Create three objects in the composition and run the script.
// Note: You may create more objects in the composition and
// change the loop controls as number of objects -1 accordingly, as
// you would do for the objects array of composition.
//
// Select Automation > Run Automation Scripts > Event Handlers.js
//
// Preview the result by switching to the preview mode
// or export the file and view it in the browser
//////////////////////////////////////////////////

// Main Code [Execution of script begins here]

// Check if any composition is open
if(application.compositions.length > 0){
    comp = application.currentComposition;
    if(comp.selection.length >= 3){ // Checks if at least one object is selected
        var objs = comp.selection; // Store all selected objects in the array objs
        setScript(comp, objs); // Call function setScript
    }
    else{ // If no objects are selected brings the Console window up
        Console.show();
        // Writes to the Console
        Console.write("\nPlease select at least 3 objects to apply the Animation and run the script again.\n");
    }
}
else{// if no composition open
    // opens a new composition
    comp = application.newComposition();
    Console.show();
    Console.write("\nNew Composition opened\nPlease create and select at least 3 objects to apply the Animation and run the script again.\n");
}

// Add your own functions here

//////////////////////////////////////////////////
//
// setScript:
//
// Demonstrates how user can add scripts to the different event
// handlers available in LiveMotion application. Also shows
// a way to access all the objects in the composition through
// player script. Adding scripts to event handlers help you to
// do event based programming.
//
// comp: The currently open and active file/composition.
// objs: All the selected objects in the composition.
//
//////////////////////////////////////////////////

function setScript(comp, objs)
{
    // Loop for naming all the objects in the composition
    // and converting them into movieclips
    for(i=0; i < objs.length ; i++){
        // Name all objects on the composition
        objs[i].name = "object"+i;

        // Convert object into MovieClip
        objs[i].isMovieClip = true;
    }

    // Note: After we convert objects to movie clips we can use
    // any of the movie clip properties/functions to manipulate
    // or animate the objects.

    // Assign script for the onLoad event handler to the variable script1.
    script1 = 'var j=0;\n';
    script1 += 'var numy = _root._height / 2; // height of the composition \n';
    script1 += 'var numx = _root._width / 2; // width of the composition\n';

    // Loop for positioning objects in a queue with difference of
    // their heights only so that one does not overlap over the other.
    script1 += 'for(var i=0; i < 3; i++){\n';
    script1 += '\t// Position all objects on composition\n';
    script1 += '\t_root[\"object\"+i]._x = 0; \n';
    script1 += '\t//Difference between positioning objects is the height of each object \n';
    script1 += '\t_root[\"object\"+i]._y = _root[\"object\"+i]._height;\n} \n';


    // This script in variable script2 is for the onEnterFrame event handler.
    script2 = 'angle = j*(Math.PI/180); // the angle for the circle\n';

    // Loop through all objects in the composition.
    script2 += 'for(var i=0; i < 3; i++){\n';
    script2 += '\t// 3 is the num of objects\n';

    // Setting the x position through the movieclips property - ._x
    // of the objects to make them move in a circle.
    script2 += '\t_root[\"object\"+i]._x = 95*Math.sin(angle+(i*2*Math.PI/8))+numx;\n';
    script2 += '\t// Formula to calculate x position of object to move them in a circle\n';

    // Setting the y position through the movieclips property - ._y
    // of the objects to make them move in a circle.
    script2 += '\t_root[\"object\"+i]._y = 95*Math.cos(angle+(i*2*Math.PI/8))+numy;\n';
    script2 += '\t// Formula to calculate y position of object to move them in a circle\n}' ;
    script2 += 'j++;\n';

    // Set the script on the specific handlers.
    comp.setHandlerScript(LMHandlerType.onLoad, script1);
    comp.setHandlerScript(LMHandlerType.onEnterFrame, script2);

    // Note: A similar getHandlerScript method is also available to get any
    // player script on any handler. This could be more useful in LiveTabs.
    return;
}