scratch-html5/js/Scratch.js

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// Copyright (C) 2013 Massachusetts Institute of Technology
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License version 2,
// as published by the Free Software Foundation.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
// Scratch HTML5 Player
// Scratch.js
// Tim Mickel, July 2011
// Here we define the actions taken on window load.
// The three application-wide global variables are defined here.
'use strict';
var runtime, interp, io, iosAudioActive = false;
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$(function() {
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runtime = new Runtime();
runtime.init();
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$(window).keydown(function(e) {
runtime.keysDown[e.which] = true;
runtime.startKeyHats(e.which);
});
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$(window).keyup(function(e) {
delete runtime.keysDown[e.which];
});
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// Update the project ID field
$('#project_id').val(project_id);
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// Go project button behavior
$('#go_project').click(function() {
window.location = "#" + parseInt($('#project_id').val());
window.location.reload(true);
});
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// Green flag behavior
$('#trigger_green_flag, #greenSlide').click(function() {
$('#greenSlide').css('display', 'none');
runtime.greenFlag()
});
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// Stop button behavior
$('#trigger_stop').click(function() {
runtime.stopAll();
});
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// Canvas container mouse events
$('#container').mousedown(function(e) {
runtime.mouseDown = true;
//e.preventDefault();
});
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$('#container').mouseup(function(e) {
runtime.mouseDown = false;
//e.preventDefault();
});
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$('#container').mousemove(function(e) {
var absX = e.pageX - this.offsetLeft;
var absY = e.pageY - this.offsetTop;
runtime.mousePos = [absX-240, -absY+180];
});
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// Touch events - EXPERIMENTAL
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$(window).bind('touchstart', function(e) {
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// On iOS, we need to activate the Web Audio API
// with an empty sound play on the first touch event.
if (!iosAudioActive) {
var ibuffer = runtime.audioContext.createBuffer(1, 1, 22050);
var isource = runtime.audioContext.createBufferSource();
isource.buffer = ibuffer;
isource.connect(runtime.audioContext.destination);
isource.noteOn(0);
iosAudioActive = true;
}
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});
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$('#container').bind('touchstart', function(e) {
runtime.mouseDown = true;
});
$('#container').bind('touchend', function(e) {
runtime.mouseDown = true;
});
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$('#container').bind('touchmove', function(e) {
var touch = e.originalEvent.touches[0] || e.originalEvent.changedTouches[0];
var absX = touch.pageX - this.offsetLeft;
var absY = touch.pageY - this.offsetTop;
runtime.mousePos = [absX-240, -absY+180];
});
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// Border touch events - EXPERIMENTAL
$('#left').bind('touchstart touchmove', function(e) { runtime.keysDown[37] = true; runtime.startKeyHats(37); });
$('#left').bind('touchend', function(e) { delete runtime.keysDown[37]; });
$('#up').bind('touchstart touchmove', function(e) { runtime.keysDown[38] = true; runtime.startKeyHats(38); });
$('#up').bind('touchend', function(e) { delete runtime.keysDown[38]; });
$('#right').bind('touchstart touchmove', function(e) { runtime.keysDown[39] = true; runtime.startKeyHats(39); });
$('#right').bind('touchend', function(e) { delete runtime.keysDown[39]; });
$('#down').bind('touchstart touchmove', function(e) { runtime.keysDown[40] = true; runtime.startKeyHats(40); });
$('#down').bind('touchend', function(e) { delete runtime.keysDown[40]; });
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// Load the interpreter and primitives
interp = new Interpreter();
interp.initPrims();
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// Load the requested project and go!
io = new IO();
io.loadProject(project_id);
});