internal static extern int DwmExtendFrameIntoClientArea(IntPtr hWnd, [In] ref MARGINS pMarInset);
private IntPtr HwndHook(IntPtr hWnd, int message, IntPtr wParam, IntPtr lParam, ref bool handled)
{
IntPtr returnval = IntPtr.Zero;
switch (message)
{
case Constants.WM_NCCALCSIZE:
/* Hides the border */
handled = true;
break;
case Constants.WM_NCPAINT:
{
if (!ShouldHaveBorder())
{
var val = 2;
UnsafeNativeMethods.DwmSetWindowAttribute(_mHWND, 2, ref val, 4);
var m = new MARGINS {
bottomHeight = 1, leftWidth = 1, rightWidth = 1, topHeight = 1
};
UnsafeNativeMethods.DwmExtendFrameIntoClientArea(_mHWND, ref m);
//if (Border != null)
// Border.BorderThickness = new Thickness(1);
}
else
{
//AddBorder();
}
handled = true;
}
break;
case Constants.WM_NCACTIVATE:
{
/* As per http://msdn.microsoft.com/en-us/library/ms632633(VS.85).aspx , "-1" lParam
* "does not repaint the nonclient area to reflect the state change." */
returnval = UnsafeNativeMethods.DefWindowProc(hWnd, message, wParam, new IntPtr(-1));
//if (!ShouldHaveBorder())
// if (wParam == IntPtr.Zero)
// AddBorder();
// else
// RemoveBorder();
handled = true;
}
break;
case Constants.WM_GETMINMAXINFO:
/* http://blogs.msdn.com/b/llobo/archive/2006/08/01/maximizing-window-_2800_with-windowstyle_3d00_none_2900_-considering-taskbar.aspx */
WmGetMinMaxInfo(hWnd, lParam);
/* Setting handled to false enables the application to process it's own Min/Max requirements,
* as mentioned by jason.bullard (comment from September 22, 2011) on http://gallery.expression.microsoft.com/ZuneWindowBehavior/ */
handled = false;
break;
case Constants.WM_NCHITTEST:
// don't process the message on windows that can't be resized
var resizeMode = AssociatedObject.ResizeMode;
if (resizeMode == ResizeMode.CanMinimize || resizeMode == ResizeMode.NoResize || AssociatedObject.WindowState == WindowState.Maximized)
{
break;
}
// get X & Y out of the message
var screenPoint = new Point(UnsafeNativeMethods.GET_X_LPARAM(lParam), UnsafeNativeMethods.GET_Y_LPARAM(lParam));
// convert to window coordinates
var windowPoint = AssociatedObject.PointFromScreen(screenPoint);
var windowSize = AssociatedObject.RenderSize;
var windowRect = new Rect(windowSize);
windowRect.Inflate(-6, -6);
// don't process the message if the mouse is outside the 6px resize border
if (windowRect.Contains(windowPoint))
{
break;
}
var windowHeight = (int)windowSize.Height;
var windowWidth = (int)windowSize.Width;
// create the rectangles where resize arrows are shown
var topLeft = new Rect(0, 0, 6, 6);
var top = new Rect(6, 0, windowWidth - 12, 6);
var topRight = new Rect(windowWidth - 6, 0, 6, 6);
var left = new Rect(0, 6, 6, windowHeight - 12);
var right = new Rect(windowWidth - 6, 6, 6, windowHeight - 12);
var bottomLeft = new Rect(0, windowHeight - 6, 6, 6);
var bottom = new Rect(6, windowHeight - 6, windowWidth - 12, 6);
var bottomRight = new Rect(windowWidth - 6, windowHeight - 6, 6, 6);
// check if the mouse is within one of the rectangles
if (topLeft.Contains(windowPoint))
{
returnval = (IntPtr)Constants.HTTOPLEFT;
}
else if (top.Contains(windowPoint))
{
returnval = (IntPtr)Constants.HTTOP;
}
else if (topRight.Contains(windowPoint))
{
returnval = (IntPtr)Constants.HTTOPRIGHT;
}
else if (left.Contains(windowPoint))
{
returnval = (IntPtr)Constants.HTLEFT;
}
else if (right.Contains(windowPoint))
{
returnval = (IntPtr)Constants.HTRIGHT;
}
else if (bottomLeft.Contains(windowPoint))
{
returnval = (IntPtr)Constants.HTBOTTOMLEFT;
}
else if (bottom.Contains(windowPoint))
{
returnval = (IntPtr)Constants.HTBOTTOM;
}
else if (bottomRight.Contains(windowPoint))
{
returnval = (IntPtr)Constants.HTBOTTOMRIGHT;
}
if (returnval != IntPtr.Zero)
{
handled = true;
}
break;
case Constants.WM_INITMENU:
var window = AssociatedObject as SparrowWindow;
if (window != null)
{
if (!window.ShowMaxRestoreButton)
{
UnsafeNativeMethods.EnableMenuItem(UnsafeNativeMethods.GetSystemMenu(hWnd, false), Constants.SC_MAXIMIZE, Constants.MF_GRAYED | Constants.MF_BYCOMMAND);
}
else
if (window.WindowState == WindowState.Maximized)
{
UnsafeNativeMethods.EnableMenuItem(UnsafeNativeMethods.GetSystemMenu(hWnd, false), Constants.SC_MAXIMIZE, Constants.MF_GRAYED | Constants.MF_BYCOMMAND);
UnsafeNativeMethods.EnableMenuItem(UnsafeNativeMethods.GetSystemMenu(hWnd, false), Constants.SC_RESTORE, Constants.MF_ENABLED | Constants.MF_BYCOMMAND);
UnsafeNativeMethods.EnableMenuItem(UnsafeNativeMethods.GetSystemMenu(hWnd, false), Constants.SC_MOVE, Constants.MF_GRAYED | Constants.MF_BYCOMMAND);
}
else
{
UnsafeNativeMethods.EnableMenuItem(UnsafeNativeMethods.GetSystemMenu(hWnd, false), Constants.SC_MAXIMIZE, Constants.MF_ENABLED | Constants.MF_BYCOMMAND);
UnsafeNativeMethods.EnableMenuItem(UnsafeNativeMethods.GetSystemMenu(hWnd, false), Constants.SC_RESTORE, Constants.MF_GRAYED | Constants.MF_BYCOMMAND);
UnsafeNativeMethods.EnableMenuItem(UnsafeNativeMethods.GetSystemMenu(hWnd, false), Constants.SC_MOVE, Constants.MF_ENABLED | Constants.MF_BYCOMMAND);
}
if (!window.ShowMinButton)
{
UnsafeNativeMethods.EnableMenuItem(UnsafeNativeMethods.GetSystemMenu(hWnd, false), Constants.SC_MINIMIZE, Constants.MF_GRAYED | Constants.MF_BYCOMMAND);
}
if (AssociatedObject.ResizeMode == ResizeMode.NoResize || window.WindowState == WindowState.Maximized)
{
UnsafeNativeMethods.EnableMenuItem(UnsafeNativeMethods.GetSystemMenu(hWnd, false), Constants.SC_SIZE, Constants.MF_GRAYED | Constants.MF_BYCOMMAND);
}
}
break;
}
return(returnval);
}
