export default function CreateConnectionHandler(canvas, layouter) {
this._canvas = canvas;
this._layouter = layouter;
}
CreateConnectionHandler.$inject = [ 'canvas', 'layouter' ];
// api //////////////////////
/**
* Appends a shape to a target shape
*
* @param {Object} context
* @param {djs.element.Base} context.source the source object
* @param {djs.element.Base} context.target the parent object
* @param {Point} context.position position of the new element
*/
CreateConnectionHandler.prototype.execute = function(context) {
var connection = context.connection,
source = context.source,
target = context.target,
parent = context.parent,
parentIndex = context.parentIndex,
hints = context.hints;
Iif (!source || !target) {
throw new Error('source and target required');
}
Iif (!parent) {
throw new Error('parent required');
}
connection.source = source;
connection.target = target;
if (!connection.waypoints) {
connection.waypoints = this._layouter.layoutConnection(connection, hints);
}
// add connection
this._canvas.addConnection(connection, parent, parentIndex);
return connection;
};
CreateConnectionHandler.prototype.revert = function(context) {
var connection = context.connection;
this._canvas.removeConnection(connection);
connection.source = null;
connection.target = null;
}; |