chEvent(e);},remakeEvent_(e,newType){const remade=new tr.b.Event(newType,true,true);remade.x=e.x;remade.y=e.y;remade.offsetX=e.offsetX;remade.offsetY=e.offsetY;remade.clientX=e.clientX;remade.clientY=e.clientY;return remade;}};function trackMouseMovesUntilMouseUp(mouseMoveHandler,opt_mouseUpHandler,opt_keyUpHandler){function cleanupAndDispatchToMouseUp(e){document.removeEventListener('mousemove',mouseMoveHandler);if(opt_keyUpHandler){document.removeEventListener('keyup',opt_keyUpHandler);}
L7670...