using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Interop;
using System.Runtime.InteropServices;
using Core;

namespace MagnifierControl
{
     public  class ControlHost : HwndHost
     {
         IntPtr hwndControl;
         IntPtr hwndHost;
         int hostHeight, hostWidth;


         public  ControlHost(double height,double width)
         {
             hostHeight = (int)height;
             hostWidth = (int)width;
         }

         protected override HandleRef BuildWindowCore(HandleRef hwndParent)
         {
             hwndControl = IntPtr.Zero;
             hwndHost = IntPtr.Zero;

             hwndHost = Native.CreateWindowEx(0,"MagnifierHost","",
                                (int)Native.WindowStyles.WS_CHILD | (int)Native.WindowStyles.WS_VISIBLE ,
                                0,0,
                                hostWidth,hostHeight,
                                hwndParent.Handle,
                                IntPtr.Zero,
                                IntPtr.Zero,
                                IntPtr.Zero);


             hwndControl = Native.CreateWindowEx(0, "Magnifier", Native.WC_MAGNIFIER,
                            (int)Native.WindowStyles.WS_CHILD | (int)Native.WindowStyles.WS_VISIBLE | (int)Native.MagnifierStyle.MS_CLIPAROUNDCURSOR,
                            0, 0, hostWidth, hostHeight,
                            hwndHost,
                            IntPtr.Zero,
                            Native.GetModuleHandle(null),
                            IntPtr.Zero);


             return new HandleRef(this, hwndControl);

         }

         protected override IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
         {
             handled = false;
             return IntPtr.Zero;
         }

         protected override void DestroyWindowCore(HandleRef hwnd)
         {
             Native.DestroyWindow(hwnd.Handle);
         }


    }
}