/// <summary>
/// http://social.msdn.microsoft.com/Forums/silverlight/en-US/0ae40192-e866-480a-9f90-2a8d2a75b045/getting-proplem-with-focus-of-customcontrol
/// </summary>
/// <returns></returns>
public bool Focus(int nField = 0)
{
Message m;
IPv4Field f = this.Field(nField);
m = Message.Create(Handle, (int)NativeMethods.WM.WM_SETREDRAW, IntPtr.Zero, IntPtr.Zero);
WndProc(ref m);
if ((nField == 0) || (f.IsEnabled == false))
{
NativeMethods.SetFocus(Handle);
}
else
{
iWM_MOUSEACTIVATE = 2;
NativeMethods.SetFocus(Handle);
iWM_MOUSEACTIVATE = 1;
m = Message.Create(Handle, (int)NativeMethods.IPAMess.IPM_SETFOCUS, (IntPtr)nField, IntPtr.Zero);
WndProc(ref m);
iWM_MOUSEACTIVATE = 0;
}
m = Message.Create(Handle, (int)NativeMethods.WM.WM_SETREDRAW, (IntPtr)1, IntPtr.Zero);
WndProc(ref m);
return(NativeMethods.RedrawWindow(new HandleRef(this, Handle), IntPtr.Zero, IntPtr.Zero, NativeMethods.RedrawWindowFlags.RDW_ALLCHILDREN | NativeMethods.RedrawWindowFlags.RDW_INVALIDATE | NativeMethods.RedrawWindowFlags.RDW_ERASENOW));
}
/// <summary>
/// Handles MouseActivate message from the contol
/// </summary>
/// <param name="m">message to process</param>
/// <returns>true if process message, false otherwise</returns>
private bool ProcessControlMouseActivate(ref Message m)
{
Debug.WriteLine("WM_MOUSEACTIVATE");
int currentFocus = NativeMethods.GetFocus();
for (int i = 0; i < 4; i++)
{
if (currentFocus == (int)_hfv.hWnd[i])
{
m.Result = (IntPtr)NativeMethods.MouseActivate.MA_NOACTIVATE;
return(true);
}
}
NativeMethods.RECT lpRect = new NativeMethods.RECT();
NativeMethods.GetWindowRect(new HandleRef(this, Handle), out lpRect);
Size sz = new Size((lpRect.Right - lpRect.Left) / 4, lpRect.Bottom - lpRect.Top);
Rectangle[] SplitRects = new Rectangle[4];
Point p = Cursor.Position;
int nFieldIPM_SETFOCUS = 0;
for (int i = 0; i < 4; i++)
{
SplitRects[i] = new Rectangle(new Point(lpRect.Left + (sz.Width * i), lpRect.Top), sz);
if (SplitRects[i].Contains(p))
{
IPv4Field f = this.Field(i);
if (!f.IsEnabled)
{
m.Result = (IntPtr)NativeMethods.MouseActivate.MA_NOACTIVATEANDEAT;
return(true);
}
nFieldIPM_SETFOCUS = i;
}
}
Debug.WriteLine("BeforeIPM_SETFOCUS");
Focus(nFieldIPM_SETFOCUS);
Debug.WriteLine("AfterIPM_SETFOCUS");
return(false);
}
