function mousePosition(event) {
    var bounds = container.getBoundingClientRect();
    var pos = {};
    // pageX / pageY needed for iOS
    pos.x = (event.clientX || event.pageX) - bounds.left;
    pos.y = (event.clientY || event.pageY) - bounds.top;
    return pos;
}
function mousePosition(event) {
    var bounds = container.getBoundingClientRect();
    var pos = {};
    
    pos.x = (event.clientX || event.pageX) - bounds.left;
    pos.y = (event.clientY || event.pageY) - bounds.top;
    return pos;
}
function mousePosition ( event ) { var bounds = container . getBoundingClientRect ( ) ; var pos = { } ; // pageX / pageY needed for iOS pos . x = ( event . clientX || event . pageX ) - bounds . left ; pos . y = ( event . clientY || event . pageY ) - bounds . top ; return pos ; }
Calculate mouse position relative to top left of viewer container.
@private
@param {MouseEvent} event - Mouse event to use in calculation
@returns {Object} Calculated X and Y coordinates
Calculate mouse position relative to top left of viewer container .