Fire Events When Dragging Instant3D Manipulator in an Assembly Example (C#)

This example shows how to fire events when dragging an Instant3D manipulator in an assembly document.

//------------------------------------
// Preconditions:
// 1. Open an assembly document.
// 2. Open the Immediate window.
//
// NOTE: Instant3D is enabled by the macro.
//
// Postconditions:
// 1. Select an Instant3D manipulator in the
//    open assembly by right-clicking a floating
//    assembly component, clicking the down arrows
//    at the bottom of the shortcut menu, and selecting
//    Move with Triad.
// 2. Drag the Instant3D handle to move the assembly component.
// 3. Writes a debug statement to the Immediate window
//    informing you that dragging of an Instant3D manipulator
//    has started.
// 4. Stop dragging the manipulator.
// 5. Writes a debug statement to the Immediate
//    window informing you that dragging of
//    an Instant3D manipulator has stopped.
// 6. Examine the Immediate window.
//----------------------------------------
using SolidWorks.Interop.sldworks;
using SolidWorks.Interop.swconst;
using System;
using System.Collections;
using System.Diagnostics;
namespace DragStateChangeNotifyAssemblyCSharp.csproj
{    partial class SolidWorksMacro
    {
        public AssemblyDoc pDoc;
        public FeatureManager swFeatMgr;
        public void Main()
        {
            ModelDoc2 swModel;
            Hashtable openAssembly;

            swModel = (ModelDoc2)swApp.ActiveDoc;

            //Enable Instant3D manipulators
            swFeatMgr = (FeatureManager)swModel.FeatureManager;
            swFeatMgr.MoveSizeFeatures = true;

            // Set up event handler
            pDoc = (AssemblyDoc)swModel;
            openAssembly = new Hashtable();
            AttachEventHandlers();
        }

        public void AttachEventHandlers()
        {
            AttachSWEvents();
        }

    
        public void AttachSWEvents()
        {
            if ((pDoc != null))    
            {
                pDoc.DragStateChangeNotify += this.pDoc_DragStateChangeNotify;
            }
        }

        private int pDoc_DragStateChangeNotify(bool State)       
        {
            int functionReturnValue = 0;
            // Write debug statement when dragging of manipulator started and stopped           
            if (State == true)
            {
                Debug.Print("Dragging of manipulator started.");
                functionReturnValue = 1;
            }
            else
            {
                Debug.Print("Dragging of manipulator stopped.");
                functionReturnValue = 0;
            }
            return functionReturnValue;
        }
    
        /// <summary>
        /// The SldWorks swApp variable is pre-assigned for you.
        /// </summary>
        public SldWorks swApp;

    }
}