I am trying to add GuidedDraggingTool in FloorPlan Project Sample but it is throwing an error “go.GuidedDraggingTool is not a constructor”. Can you please help me out how can i use it.

Have you successfullly loaded the JavaScript for that extension class?

If so, I believe that the GuidedDraggingTool is not loaded in the go namespace. Try removing “go.” from your code there.

Thanks Walter.
That did fix the problem.But i am not able to see guideline can you help me out what are the changes required to enable the guideline in FloorPlan project. I have also set below property as shown in example Guided Dragging

this.draggingTool.isGuidelineEnabled = true;

The Floorplan.js file overrides some of the DraggingTool methods, by changing the instance that the ToolManager has.

I suggest that you replace the ToolManager.draggingTool with an instance of GuidedDraggingTool before that code, and replace references to:

By the way, isGuidelineEnabled defaults to true, so you don’t have to set it.

Hi walter,

Made the following changes as mention above

  1. Change the instance

// this.draggingTool = new go.DraggingTool();
this.draggingTool=new GuidedDraggingTool();

2.Replace go.DraggingTool.Prototype with “GuidedDraggingTool.prototype”

// If a wall was dragged to intersect another wall, update angle displays
this.toolManager.draggingTool.doMouseUp = function () {;
this.isGridSnapEnabled = this.diagram.model.modelData.preferences.gridSnap;

// If user holds SHIFT while dragging, do not use grid snap
this.toolManager.draggingTool.doMouseMove = function () {
    if (this.diagram.lastInput.shift) {
        this.isGridSnapEnabled = false;
    } else this.isGridSnapEnabled = this.diagram.model.modelData.preferences.gridSnap;
this.toolManager.draggingTool.canStart = function() {
    return &&
        this.diagram.selection.count === 1;

but still not getting guidelines
Can you please help me out what i am missing here

I suggest that you debug the code to make sure that each of the GuidedDraggingTool methods is being called appropriately as mouse events happen.

I cant figure out what is wrong,
Can you please help me out?

HI walter ,
Can you help me out with this?