Function onMove

nodeImage.js:1701–1707

(ev)

                    ev.preventDefault();
                }
                function onMove(ev) {
                    if (!dragging) return;
                    var dx = ev.clientX - startX;
                    var dy = ev.clientY - startY;
                    box.style.left = (boxRect.left + dx) + 'px';
                    box.style.top = (boxRect.top + dy) + 'px';
                }
                function onUp() { dragging = false; }
                dragHandle.onmousedown = onDown;
                document.addEventListener('mousemove', onMove);