glitch-images/scripts/src/controls.js

114 lines
2.2 KiB
JavaScript
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/*global define*/
define(
function()
{
var values = { };
var is_initialized = false;
var signals;
var controls;
function init( shared )
{
signals = shared.signals;
if ( shared.feature['query-selector-all'] )
{
var wrapper = document.getElementById( 'controls' );
controls = wrapper.querySelectorAll( '.control-input' );
wrapper.className += ' is-active';
for ( var i = 0; i < controls.length; i++ )
{
var control = controls[i];
control.addEventListener( 'input', controlUpdated, false );
updateValue( getInputKey( control.id ), control.value );
updateInput( getCorrespondingInput( control.id ), control.value );
}
is_initialized = true;
signals['control-set'].add( setControlValues );
signals['control-updated'].dispatch( values );
}
}
function controlUpdated( element )
{
if ( element.target )
{
element = element.target;
}
updateValue( getInputKey( element.id ), element.value );
updateInput( getCorrespondingInput( element.id ), element.value );
}
function setControlValues( new_values )
{
var control;
var updated_values = { };
for ( var id in new_values )
{
control = getCorrespondingInput( id );
control.value = new_values[id];
controlUpdated( control );
updated_values[ getInputKey( id ) ] = new_values[id];
}
values = updated_values;
signals['control-updated'].dispatch( values );
}
function updateValue( key, value )
{
values[key] = value;
if ( is_initialized )
{
signals['control-updated'].dispatch( values );
}
}
function updateInput( input, value )
{
if ( input.value !== value )
{
input.value = value;
}
}
function getCorrespondingInput( id )
{
var result;
var key = getInputKey( id );
var element_id;
for ( var i = 0, len = controls.length; i < len; i++ )
{
element_id = controls[i].id;
if (
element_id !== id &&
element_id.indexOf( key ) !== -1
)
{
result = controls[i];
break;
}
}
return result;
}
function getInputKey( id )
{
return id.replace( '-slider', '' ).replace( '-number', '' );
}
return { init: init };
}
);