Function bindingValueHasChanged

src/plots/command.js:209–240

(gd, binding, cache)

};

function bindingValueHasChanged(gd, binding, cache) {
    var container, value, obj;
    var changed = false;

    if(binding.type === 'data') {
        // If it's data, we need to get a trace. Based on the limited scope
        // of what we cover, we can just take the first trace from the list,
        // or otherwise just the first trace:
        container = gd._fullData[binding.traces !== null ? binding.traces[0] : 0];
    } else if(binding.type === 'layout') {
        container = gd._fullLayout;
    } else {
        return false;
    }

    value = Lib.nestedProperty(container, binding.prop).get();

    obj = cache[binding.type] = cache[binding.type] || {};

    if(obj.hasOwnProperty(binding.prop)) {
        if(obj[binding.prop] !== value) {
            changed = true;
        }
    }

    obj[binding.prop] = value;

    return {
        changed: changed,
        value: value
    };
}

/*
 * Execute an API command. There's really not much to this; it just provides