angular-material modal drag directive

gistfile1.txt

// Usage
//
//<md-dialog rc-drag="md-toolbar" ng-cloak>
//  <form>
//    <md-toolbar>
//      ...
//    </md-toolbar>
//    <md-dialog-content>
//      ...
//    </md-dialog-content>
//  </form>
//</md-dialog>


function rcDragDirective($window, $document) {
  'ngInject';

  const moveThreshold = 100;

  let documentListenersActive = false;
  let rAFPending = false;
  let mouseStart = null;
  let mouseLast = null;
  let mouseDelta = {x: 0, y: 0};
  let offset = {x: 0, y: 0};
  let target;

  function setupDocumentListeners() {
    if (!documentListenersActive) {
      $document.on('mousemove', mousemove);
      $document.on('mouseup', mouseup);
      documentListenersActive = true;
    }
  }

  function takedownDocumentListeners() {
    if (documentListenersActive) {
      $document.off('mousemove', mousemove);
      $document.off('mouseup', mouseup);
      documentListenersActive = false;
    }
  }

  function updateViewport() {
    target.css('transform', 'translate('+ (offset.x + mouseDelta.x) +'px,'+ (offset.y + mouseDelta.y) +'px)');
  }

  function requestUpdateViewport() {
    if (!rAFPending) {
      $window.requestAnimationFrame(function() {
        updateViewport();
        rAFPending = false;
      });
      rAFPending = true;
    }
  }

  function mousedown(ev) {
    mouseStart = {x: ev.pageX, y: ev.pageY};
    mouseLast = mouseStart;
    setupDocumentListeners();
  }

  function mousemove(ev) {
    if (mouseLast === null || Math.abs(ev.pageX - mouseLast.x) > moveThreshold || Math.abs(ev.pageY - mouseLast.y) > moveThreshold) {
      mouseStart = null;
      mouseup();
    }
    else {
      mouseLast = {x: ev.pageX, y: ev.pageY};
      mouseDelta = {x: (ev.pageX - mouseStart.x), y: (ev.pageY - mouseStart.y)};
      requestUpdateViewport();
    }
  }

  function mouseup() {
    if (mouseStart !== null) {
      offset.x += mouseDelta.x;
      offset.y += mouseDelta.y;
      mouseDelta = {x: 0, y: 0};
    }
    mouseStart = null;
    mouseLast = null;
    takedownDocumentListeners();
  }

  function link(scope, elem, attrs) {
    target = elem;

    angular.element(elem[0].querySelector(attrs.rcDrag)).bind('mousedown', mousedown);

    scope.$on('$destroy', function() {
      takedownDocumentListeners();
    });
  }

  return {
    restrict: 'A',
    link: link
  };
}

export default rcDragDirective;

Thanks, just found this and it's nice. Just trying to figure out out to set a containment area (as provided with the JQuery's draggable) so the dialog box doesn't get moved and let go outside of the viewport. If you have any tips, let me know. Thanks.

Thanks a lot!

Can this be updated or work with mat-dialog?