gojs/projects/electricCircuit/WireDragTool.js

Interactive diagrams, charts, and graphs, such as trees, flowcharts, orgcharts, UML, BPMN, or business diagrams

function WireDragTool() {
  go.Tool.call(this);
  this.name = "WireDragTool";

  /** @type {number} */
  this._delay = 175;

	/** @type {Node} */
	this.moveNode = null;
}

go.Diagram.inherit(WireDragTool, go.Tool);

/**
* This tool can run when there has been a mouse-drag, far enough away not to be a click,
* and there has been delay of at least {@link #delay} milliseconds
* after the mouse-down before a mouse-move.
* <p/>
* This method may be overridden.
* @this {WireDragTool}
* @return {boolean}
*/
WireDragTool.prototype.canStart = function() {
  if (!this.isEnabled) return false;
  var diagram = this.diagram;
  if (diagram === null) return false;
  // heed IsReadOnly & AllowInsert
  if (diagram.isReadOnly || diagram.isModelReadOnly) return false;
  if (!diagram.allowInsert) return false;
  var e = diagram.lastInput;
  // require left button & that it has moved far enough away from the mouse down point, so it isn't a click
  if (!e.left) return false;
  // don't include the following checks when this tool is running modally
  if (diagram.currentTool !== this) {
    if (!this.isBeyondDragSize()) return false;
    // must wait for "delay" milliseconds before that tool can run
    if (e.timestamp - diagram.firstInput.timestamp < this.delay) return false;
  }
  return true;
};

/**
* Capture the mouse and creates the wire endpoints, then creates a link between them
* @this {WireDragTool}
*/
WireDragTool.prototype.doActivate = function() {
  var diagram = this.diagram;
  if (diagram === null) return;
  this.isActive = true;
  diagram.isMouseCaptured = true;
  var label1 = { category: "junction" }; // Create empty NodeData
	var label2 = { category: "junction" };
  diagram.model.addNodeData(label1);
	diagram.model.addNodeData(label2);
	var node1 = diagram.findNodeForData(label1);
	var node2 = diagram.findNodeForData(label2);
	node1.location = diagram.firstInput.documentPoint;
	node2.location = diagram.lastInput.documentPoint;
	this.moveNode = node2; // remembers node2 for moving
	diagram.model.addLinkData({
		from: node1.key,
		to: node2.key,
		fromPort: "inout",
		toPort: "inout"
	});
  this.doMouseMove();
};

/**
* Update the second junction's position according to the mouse location
* @this {WireDragTool}
*/
WireDragTool.prototype.doMouseMove = function() {
  var diagram = this.diagram;
  if (diagram === null) return;
  if (this.isActive) {
		this.moveNode.location = diagram.lastInput.documentPoint;
  }
};

// Public properties

/**
* Gets or sets the time in milliseconds for which the mouse must be stationary
* before this tool can be started.
* The default value is 175 milliseconds.
* A value of zero will allow this tool to run without any wait after the mouse down.
* Setting this property does not raise any events.
* @name WireDragTool#delay
* @function.
* @return {number}
*/
Object.defineProperty(WireDragTool.prototype, "delay", {
  get: function() { return this._delay; },
  set: function(val) { this._delay = val; }
});