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using System;
using System.Drawing;
using System.Collections;
using System.Windows.Forms;
using System.Data;
using System.Diagnostics;

using NXOpen;
using NXOpen.Assemblies;
using NXOpen.UF;

// This class demonstrates a simple viewer that displays the tree structure of an
// assembly. The color of the selected component can be changed by pressing the "Set
// Color" button.

public class AssemblyViewer : System.Windows.Forms.Form
{
    // Cached NXOpen session
    private static NXOpen.Session theSession;
    private static NXOpen.UF.UFSession theUFSession;

    // The active AssemblyViewer 
    private static AssemblyViewer theViewer;


    // Hashtable containing basic color names and their corresponding color IDs. 
    // For simplicity, we are just supporting the basic primaries. See UFDisp
    // for a full set of color handling methods.
    private static Hashtable colorTable;

    static AssemblyViewer() {
        colorTable = new Hashtable();
        colorTable["Blue"] = UFDisp.ColorName.BlueName;
        colorTable["Green"] = UFDisp.ColorName.GreenName;
        colorTable["Cyan"] = UFDisp.ColorName.CyanName;
        colorTable["Red"] = UFDisp.ColorName.RedName;
        colorTable["Magenta"] = UFDisp.ColorName.MagentaName;
        colorTable["Yellow"] = UFDisp.ColorName.YellowName;
        colorTable["White"] = UFDisp.ColorName.WhiteName;
        colorTable["Black"] = UFDisp.ColorName.BlackName;

    }

    // WinForm components
    private System.Windows.Forms.TreeView assemblyTree;
    private System.Windows.Forms.ComboBox colorBox;
    private System.Windows.Forms.GroupBox groupBox1;
    private System.Windows.Forms.Button setColorButton;
    private System.Windows.Forms.RadioButton allComponent *** utton;
    private System.Windows.Forms.RadioButton singleComponentButton;
    private System.Windows.Forms.Button closeButton;

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    // Updates the assemblyTree that contains the assembly structrue. Called at startup,
    // and whenever the work part changes.
    private void UpdateTree()
    {
        assemblyTree.Nodes.Clear();
        componentTable.Clear();
        selectedComponent = null;

        if (theSession.Parts.Display != null)
        {
            // For a piece part, the RootComponent will be null, so we don't display
            // an assembly tree.
            Component rootComponent = theSession.Parts.Display.ComponentAssembly.RootComponent;
            if (rootComponent != null)
            {
                TreeNode rootNode = new TreeNode("ROOT");
                assemblyTree.Nodes.Add(rootNode);
                componentTable[rootNode] = rootComponent;
                AddChildren(rootNode, rootComponent);
                rootNode.Expand();
            }
        }
    }

    // Recursive method that adds the children of "component" to the tree node "node"
    private void AddChildren(TreeNode node, Component component) 
    {
        Component[] childComponents = component.GetChildren();
        for (int i = 0; i < childComponents.Length; i++) 
        {
            TreeNode childNode = new TreeNode(childComponents[i].Name);
            componentTable[childNode] = childComponents[i];
            node.Nodes.Add(childNode);
            AddChildren(childNode, childComponents[i]);
        }

    }


    // Invoked when the viewer is closed. Unhighlight any components
    // that we have selected, and unregister the work part callback. 
    private void OnClose(object sender, System.ComponentModel.CancelEventArgs e)
    {
        HighlightComponent(selectedComponent, false);
        selectedComponent = null;
        UnregisterCallbacks();
    }

}