// Copyright 2012 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 System;
using ESRI.ArcGIS.Carto;
using ESRI.ArcGIS.Geometry;
using ESRI.ArcGIS.Controls;
using ESRI.ArcGIS.SystemUI;
using System.Runtime.InteropServices;

namespace PanZoom
{
  [ClassInterface(ClassInterfaceType.None)]
  [Guid("C5320014-6485-4d24-9E11-554FDC52CB5E")]

  public class PanRight : ICommand
  {
    #region Component Category Registration
  
    [ComRegisterFunction()]
    [ComVisible(false)]
    static void RegisterFunction(String sKey)
    {
      string fullKey = sKey.Remove(0, 18) + @"\Implemented Categories";
      Microsoft.Win32.RegistryKey regKey = Microsoft.Win32.Registry.ClassesRoot.OpenSubKey(fullKey, true);
      if (regKey != null)
      {
        regKey.CreateSubKey("{B56A7C42-83D4-11D2-A2E9-080009B6F22B}");
      }
    }
  
    [ComUnregisterFunction()]
    [ComVisible(false)]
    static void UnregisterFunction(String sKey)
    {
      string fullKey = sKey.Remove(0, 18) + @"\Implemented Categories";
      Microsoft.Win32.RegistryKey regKey = Microsoft.Win32.Registry.ClassesRoot.OpenSubKey(fullKey, true);
      if (regKey != null)
      {
        regKey.DeleteSubKey("{B56A7C42-83D4-11D2-A2E9-080009B6F22B}");
      }
    }
  #endregion#

    [DllImport("gdi32.dll")]
    static extern bool DeleteObject(IntPtr hObject);

    private System.Drawing.Bitmap m_bitmap;
    private IntPtr m_hBitmap;
    private IHookHelper m_pHookHelper;

    public PanRight()
    {
      string[] res = GetType().Assembly.GetManifestResourceNames();
      if(res.GetLength(0) > 0)
      {
        m_bitmap = new System.Drawing.Bitmap(GetType().Assembly.GetManifestResourceStream(GetType(), "PanRight.bmp"));
        if(m_bitmap != null)
        {
          m_bitmap.MakeTransparent(m_bitmap.GetPixel(1,1));
          m_hBitmap = m_bitmap.GetHbitmap();
        }
      }
      m_pHookHelper = new HookHelperClass ();
    }

    ~PanRight()
    {
      if(m_hBitmap.ToInt32() != 0)
        DeleteObject(m_hBitmap);
    }
  
    #region ICommand Members

    public void OnClick()
    {
      if(m_pHookHelper == null) return;

      //Get the active view
      IActiveView pActiveView = (IActiveView) m_pHookHelper.FocusMap;

      //Get the extent
      IEnvelope pEnvelope = (IEnvelope) pActiveView.Extent;

      //Create a point to pan to
      IPoint pPoint;
      pPoint = new PointClass();
      pPoint.X = ((pEnvelope.XMin + pEnvelope.XMax) / 2) + (pEnvelope.Height / (100 / GetPanFactor()));
      pPoint.Y = ((pEnvelope.YMin + pEnvelope.YMax) / 2); 

      //Center the envelope on the point
      pEnvelope.CenterAt(pPoint);

      //Set the new extent
      pActiveView.Extent = pEnvelope;

      //Refresh the active view
      pActiveView.Refresh();
    }

    private long GetPanFactor()
    {
      return 50;
    }

    public string Message
    {
      get
      {
        return "Pan display right by the pan factor percentage";
      }
    }

    public int Bitmap
    {
      get
      {
        return m_hBitmap.ToInt32();
      }
    }

    public void OnCreate(object hook)
    {
      m_pHookHelper.Hook = hook;      
    }

    public string Caption
    {
      get
      {
        return "Pan Right";
      }
    }

    public string Tooltip
    {
      get
      {
        return "Pan Right";
      }
    }

    public int HelpContextID
    {
      get
      {
        // TODO:  Add PanRight.HelpContextID getter implementation
        return 0;
      }
    }

    public string Name
    {
      get
      {
        return "Sample_Pan/Zoom_Pan Right";
      }
    }

    public bool Checked
    {
      get
      {
        return false;
      }
    }

    public bool Enabled
    {
      get
      {
        if(m_pHookHelper.FocusMap == null) return false;
        
        return true;
      }
    }

    public string HelpFile
    {
      get
      {
        // TODO:  Add PanRight.HelpFile getter implementation
        return null;
      }
    }

    public string Category
    {
      get
      {
        return "Sample_Pan/Zoom";
      }
    }

    #endregion
  }
}