using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Runtime.CompilerServices;
namespace EdgeGesture
{
public class EdgeGestureUtil
{
private static Guid DISABLE_TOUCH_SCREEN = new Guid("32CE38B2-2C9A-41B1-9BC5-B3784394AA44");
private static Guid IID_PROPERTY_STORE = new Guid("886d8eeb-8cf2-4446-8d02-cdba1dbdcf99");
private static short VT_BOOL = 11;
#region "Structures"
[StructLayout(LayoutKind.Sequential, Pack = 4)]
public struct PropertyKey
{
public PropertyKey(Guid guid, UInt32 pid)
{
fmtid = guid;
this.pid = pid;
}
[MarshalAs(UnmanagedType.Struct)]
public Guid fmtid;
public uint pid;
}
[StructLayout(LayoutKind.Explicit)]
public struct PropVariant
{
[FieldOffset(0)]
public short vt;
[FieldOffset(2)]
private short wReserved1;
[FieldOffset(4)]
private short wReserved2;
[FieldOffset(6)]
private short wReserved3;
[FieldOffset(8)]
private sbyte cVal;
[FieldOffset(8)]
private byte bVal;
[FieldOffset(8)]
private short iVal;
[FieldOffset(8)]
public ushort uiVal;
[FieldOffset(8)]
private int lVal;
[FieldOffset(8)]
private uint ulVal;
[FieldOffset(8)]
private int intVal;
[FieldOffset(8)]
private uint uintVal;
[FieldOffset(8)]
private long hVal;
[FieldOffset(8)]
private long uhVal;
[FieldOffset(8)]
private float fltVal;
[FieldOffset(8)]
private double dblVal;
[FieldOffset(8)]
public bool boolVal;
[FieldOffset(8)]
private int scode;
//CY cyVal;
[FieldOffset(8)]
private DateTime date;
[FieldOffset(8)]
private System.Runtime.InteropServices.ComTypes.FILETIME filetime;
//CLSID* puuid;
//CLIPDATA* pclipdata;
//BSTR bstrVal;
//BSTRBLOB bstrblobVal;
[FieldOffset(8)]
private Blob blobVal;
//LPSTR pszVal;
[FieldOffset(8)]
private IntPtr pwszVal;
//LPWSTR
//IUnknown* punkVal;
//IDispatch* pdispVal;
// IStream* pStream;
// IStorage* pStorage;
// LPVERSIONEDSTREAM pVersionedStream;
// LPSAFEARRAY parray;
// CAC cac;
// CAUB caub;
// CAI cai;
// CAUI caui;
// CAL cal;
// CAUL caul;
// CAH cah;
// CAUH cauh;
// CAFLT caflt;
// CADBL cadbl;
// CABOOL cabool;
// CASCODE cascode;
// CACY cacy;
// CADATE cadate;
// CAFILETIME cafiletime;
// CACLSID cauuid;
// CACLIPDATA caclipdata;
// CABSTR cabstr;
// CABSTRBLOB cabstrblob;
// CALPSTR calpstr;
// CALPWSTR calpwstr;
// CAPROPVARIANT capropvar;
// CHAR* pcVal;
// UCHAR* pbVal;
// SHORT* piVal;
// USHORT* puiVal;
// LONG* plVal;
// ULONG* pulVal;
// INT* pintVal;
// UINT* puintVal;
// FLOAT* pfltVal;
// DOUBLE* pdblVal;
// VARIANT_BOOL* pboolVal;
// DECIMAL* pdecVal;
// SCODE* pscode;
// CY* pcyVal;
// DATE* pdate;
// BSTR* pbstrVal;
// IUnknown** ppunkVal;
// IDispatch** ppdispVal;
// LPSAFEARRAY* pparray;
// PROPVARIANT* pvarVal;
//
/// <summary>
/// Helper method to gets blob data
/// </summary>
private byte[] GetBlob()
{
byte[] Result = new byte[blobVal.Length];
Marshal.Copy(blobVal.Data, Result, 0, Result.Length);
return Result;
}
/// <summary>
/// Property value
/// </summary>
public object Value
{
get
{
VarEnum ve = (VarEnum)vt;
switch (ve)
{
case VarEnum.VT_I1:
return bVal;
case VarEnum.VT_I2:
return iVal;
case VarEnum.VT_I4:
return lVal;
case VarEnum.VT_I8:
return hVal;
case VarEnum.VT_INT:
return iVal;
case VarEnum.VT_UI4:
return ulVal;
case VarEnum.VT_LPWSTR:
return Marshal.PtrToStringUni(pwszVal);
case VarEnum.VT_BLOB:
return GetBlob();
}
throw new NotImplementedException("PropVariant " + ve.ToString());
}
}
}
internal struct Blob
{
public int Length;
public IntPtr Data;
//Code Should Compile at warning level4 without any warnings,
//However this struct will give us Warning CS0649: Field [Fieldname]
//is never assigned to, and will always have its default value
//You can disable CS0649 in the project options but that will disable
//the warning for the whole project, it's a nice warning and we do want
//it in other places so we make a nice dummy function to keep the compiler
//happy.
private void FixCS0649()
{
Length = 0;
Data = IntPtr.Zero;
}
}
#endregion
#region "Interfaces"
[ComImport(), Guid("886D8EEB-8CF2-4446-8D02-CDBA1DBDCF99"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
public interface IPropertyStore
{
[MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
void GetCount([Out(), In()] ref uint cProps);
[MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
void GetAt([In()] uint iProp, ref PropertyKey pkey);
[MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
void GetValue([In()] ref PropertyKey key, ref PropVariant pv);
[MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
void SetValue([In()] ref PropertyKey key, [In()] ref PropVariant pv);
[MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
void Commit();
[MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
void Release();
}
#endregion
#region "Methods"
[DllImport("shell32.dll", SetLastError = true)]
private static extern int SHGetPropertyStoreForWindow(IntPtr handle, Guid riid, ref IPropertyStore propertyStore);
public static void EnableEdgeGestures(IntPtr hwnd, bool enable)
{
IPropertyStore pPropStore = null;
int hr = 0;
hr = SHGetPropertyStoreForWindow(hwnd, IID_PROPERTY_STORE, ref pPropStore);
if (hr == 0)
{
PropertyKey propKey = new PropertyKey();
propKey.fmtid = DISABLE_TOUCH_SCREEN;
propKey.pid = 2;
PropVariant var = new PropVariant();
var.vt = VT_BOOL;
var.boolVal = enable;
pPropStore.SetValue(ref propKey, ref var);
Marshal.FinalReleaseComObject(pPropStore);
}
}
#endregion
}
//=======================================================
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//=======================================================
}