// Copyright 2010 ESRI
// 
// All rights reserved under the copyright laws of the United States
// and applicable international laws, treaties, and conventions.
// 
// You may freely redistribute and use this sample code, with or
// without modification, provided you include the original copyright
// notice and use restrictions.
// 
// See the use restrictions.
// 

using ESRI.ArcGIS.Carto;
using ESRI.ArcGIS.Geometry;
using ESRI.ArcGIS.esriSystem;
using ESRI.ArcGIS.Controls;
using ESRI.ArcGIS.ADF.BaseClasses;
using ESRI.ArcGIS.ADF.CATIDs;
using System.Runtime.InteropServices;
using System.Windows.Forms;

namespace ZoomFactorExtensionCSharp
{
  [ClassInterface(ClassInterfaceType.None)]
  [Guid("e9ea3574-e45f-4197-9e07-9c0c323f8791")]
  public sealed class SetZoomFactor: BaseCommand
  {
    //The HookHelper object that deals with the hook passed to the OnCreate event
    private IHookHelper m_HookHelper = new HookHelperClass();

    #region "Component Category Registration"
    [ComRegisterFunction()]
    static void Reg(string regKey)
    {
      ControlsCommands.Register(regKey);
    }

    [ComUnregisterFunction()]
    static void Unreg(string regKey)
    {
      ControlsCommands.Unregister(regKey);
    }
    #endregion

    public SetZoomFactor()
    {
      //Set the command properties      
      base.m_caption = "Set Variable Zoom";
      base.m_message = "Set Variable Zoom";
      base.m_toolTip = "Set Variable Zoom";
      base.m_category = "ZoomExtension Sample(CSharp)";
      base.m_name = "ZoomExtension Sample(CSharp)_Set Variable Zoom";
      base.m_bitmap = new System.Drawing.Bitmap(GetType().Assembly.GetManifestResourceStream("Commands.zoomfactor.bmp"));
    }
  
    public override void OnCreate(object hook)
    {
      //Not implemented
    }
    
    public override bool Enabled
    {
      get
      {
        //Get the extension manager
        IExtensionManager extensionManager = new ExtensionManagerClass();

        //Get the extension from the extension manager
        IExtension extension = extensionManager.FindExtension("Zoom Factor Extension");

        //Get the state of the extension
        IExtensionConfig extensionConfig = (IExtensionConfig) extension;
        if (extensionConfig != null)
        {
          if (extensionConfig.State == esriExtensionState.esriESEnabled) return true;
          else return false;
        }
        else
        {
          return false;
        }
      }
    }

    public override void OnClick()
    {
      //Get the extension manager
      ExtensionManager extensionManager = new ExtensionManagerClass();
      //Get the extension from the extension manager
      IExtension extension = extensionManager.FindExtension("Zoom Factor Extension");

      IZoomExtension zoomExtension = (IZoomExtension) extension;
      double zoomFactor = zoomExtension.ZoomFactor;

      //Get a zoom factor from the user
      InputFormResult res = InputForm.ShowModal(null,"Enter a zoom factor","ZoomExtension Sample", zoomExtension.ZoomFactor.ToString() );

      if (res.Result == DialogResult.Cancel) return;
      string zoomString = res.InputString;
      if (zoomString.Trim() == "") return;

      //Set the zoom factor
      if (System.Char.IsNumber(zoomString,0) == true) zoomExtension.ZoomFactor = System.Convert.ToDouble(zoomString);
    }
  }
}