cytoscape-edge-editing

cytoscape-edge-editing

Description

A Cytoscape.js extension enabling interactive editing of edge bend points and reconnection of edges to other source/target nodes, distributed under The MIT License.

• To highlight bend point positions of an edge you should select the edge and unselect any other edges. Note that in determining the edge to highlight bend point positions we assume that the unvisible edges are not selected.
• To add a bend point select the edge and unselect any other edge, right click where you want to add the bend point and click 'Add Bend Point' on the context menu (requires 'cytoscape.js-context-menus' extension).
• To remove a bend point select the edge and unselect any other edge, right click on the bend point and click 'Remove Bend Point' on the context menu (requires 'cytoscape.js-context-menus' extension).
• To move a bend point drag and drop it when the edge is the only selected edge.
• Alternatively,
  • You can click anywhere on the edge (if it is the only selected edge) to introduce and relocate a bend point by dragging.
  • A bend point is removed if it is dropped near the line segment between its two neighbours.
• To reconnect an edge, select the handle (source or target), drag and drop on the new (source or target) node.

Demo

Click here for demo

Dependencies

• Cytoscape.js ^3.3.0
• jQuery ^1.7.0 || ^2.0.0 || ^3.0.0
• cytoscape-undo-redo.js(optional) ^1.0.1
• cytoscape-context-menus.js(optional) ^2.0.0

Usage instructions

Download the library:

• via npm: npm install cytoscape-edge-editing,
• via bower: bower install cytoscape-edge-editing, or
• via direct download in the repository (probably from a tag).

require() the library as appropriate for your project:

CommonJS:

var cytoscape = require('cytoscape');
var jquery = require('jquery');
var edgeBendEditing = require('cytoscape-edge-editing');

edgeEditing( cytoscape, jquery ); // register extension

AMD:

require(['cytoscape', 'cytoscape-edge-editing'], function( cytoscape, edge-editing ){
  edge-editing( cytoscape ); // register extension
});

Plain HTML/JS has the extension registered for you automatically, because no require() is needed.

API

var instance = cy.edgeEditing( options );

An instance has a number of functions available:

/*
* Get segment points of the given edge in an array A,
* A[2 * i] is the x coordinate and A[2 * i + 1] is the y coordinate
* of the ith bend point. (Returns undefined if the curve style is not segments)
*/
instance.getSegmentPoints(ele);
// Initilize bend points for the given edges using 'options.bendPositionsFunction'
instance.initBendPoints(eles)

You can also get an existing instance:

cy.edgeEditing('get'); // Returns undefined if the extension is not initialized yet

Or you can check if the extension is initilized before

cy.edgeEditing('initialized');

Default Options

    var options = {
      // this function specifies the positions of bend points
      bendPositionsFunction: function(ele) {
        return ele.data('bendPointPositions');
      },
      // whether to initilize bend points on creation of this extension automatically
      initBendPointsAutomatically: true,
      // whether the bend editing operations are undoable (requires cytoscape-undo-redo.js)
      undoable: false,
      // the size of bend shape is obtained by multipling width of edge with this parameter
      bendShapeSizeFactor: 3,
      // z-index value of the canvas in which bend points are drawn
      zIndex: 999,
      // whether to start the plugin in the enabled state
      enabled: true,
       /*An option that controls the distance (in pixels) within which a bend point is considered near the line segment between 
         its two neighbors and will be automatically removed
         min value = 0 , max value = 20 , values less than 0 are set to 0 and values greater than 20 are set to 20
       */
      bendRemovalSensitivity : 8,
      // title of add bend point menu item (User may need to adjust width of menu items according to length of this option)
      addBendMenuItemTitle: "Add Bend Point",
      // title of remove bend point menu item (User may need to adjust width of menu items according to length of this option)
      removeBendMenuItemTitle: "Remove Bend Point",
      // whether the bend point can be moved by arrow keys
      moveSelectedBendPointsOnKeyEvents: function () {
        return true;
      }
      // this function handles reconnection of the edge, if undefined simply connect edge to its new source/target 
      // handleReconnectEdge (newSource.id(), newTarget.id(), edge.data())
      handleReconnectEdge: undefined,
      // this function checks validation of the edge and its new source/target
      validateEdge: function (edge, newSource, newTarget) {
         return 'valid';
      },
      // this function is called if reconnected edge is not valid according to validateEdge function
      actOnUnsuccessfulReconnection: undefined,
      
    };

Publishing instructions

This project is set up to automatically be published to npm and bower. To publish:

1. Set the version number environment variable: export VERSION=1.2.3
2. Publish: gulp publish
3. If publishing to bower for the first time, you'll need to run bower register cytoscape-edge-editing https://github.com/iVis-at-Bilkent/cytoscape.js-edge-editing.git

Team

• Metin Can Siper, Ahmet Candiroglu, Ugur Dogrusoz of i-Vis at Bilkent University