internal class HideOnHoverLogic : Window
{
public Window AppWindow { get; set; }
public FrameworkElement BorderContainer { get; set; }
public HideOnHoverLogic(Window appWindow, FrameworkElement borderContainer)
{
MouseHook.Start();
MouseHook.MouseAction += new EventHandler(OnHoverHide);
AppWindow = appWindow;
this.BorderContainer = borderContainer;
}
[DllImport("user32.dll")]
[return: MarshalAs(UnmanagedType.Bool)]
internal static extern bool GetCursorPos(ref Win32Point pt);
[StructLayout(LayoutKind.Sequential)]
internal struct Win32Point
{
public int X;
public int Y;
};
public static Point GetMousePosition()
{
var w32Mouse = new Win32Point();
GetCursorPos(ref w32Mouse);
return new Point(w32Mouse.X, w32Mouse.Y);
}
public void OnHoverHide(object? sender, EventArgs e)
{
Point MousePos = GetMousePosition();
Point TopLeftWindowPoint = new Point(AppWindow.Left, AppWindow.Top);
Point BottomRightWindowPoint = new Point(AppWindow.Left + AppWindow.Width, AppWindow.Top + AppWindow.Height);
//If mouse isn't over window
if (MousePos.X >= TopLeftWindowPoint.X && MousePos.Y >= TopLeftWindowPoint.Y)
{
if (MousePos.X <= BottomRightWindowPoint.X && MousePos.Y <= BottomRightWindowPoint.Y)
{
BorderContainer.Opacity = 0;
return;
}
}
BorderContainer.Opacity = 1;
}
public static class MouseHook
{
public static event EventHandler MouseAction = delegate { };
public static void Start()
{
_hookID = SetHook(_proc);
}
public static void stop()
{
UnhookWindowsHookEx(_hookID);
}
private static LowLevelMouseProc _proc = HookCallback;
private static IntPtr _hookID = IntPtr.Zero;
private static IntPtr SetHook(LowLevelMouseProc proc)
{
using (Process curProcess = Process.GetCurrentProcess())
using (ProcessModule curModule = curProcess.MainModule)
{
return SetWindowsHookEx(WH_MOUSE_LL, proc,
GetModuleHandle(curModule.ModuleName), 0);
}
}
private delegate IntPtr LowLevelMouseProc(int nCode, IntPtr wParam, IntPtr lParam);
private static IntPtr HookCallback(
int nCode, IntPtr wParam, IntPtr lParam)
{
if (nCode >= 0 && MouseMessages.WM_MOUSEMOVE == (MouseMessages)wParam)
{
MSLLHOOKSTRUCT hookStruct = (MSLLHOOKSTRUCT)Marshal.PtrToStructure(lParam, typeof(MSLLHOOKSTRUCT));
MouseAction(null, new EventArgs());
}
return CallNextHookEx(_hookID, nCode, wParam, lParam);
}
private const int WH_MOUSE_LL = 14;
private enum MouseMessages
{
WM_LBUTTONDOWN = 0x0201,
WM_LBUTTONUP = 0x0202,
WM_MOUSEMOVE = 0x0200,
WM_MOUSEWHEEL = 0x020A,
WM_RBUTTONDOWN = 0x0204,
WM_RBUTTONUP = 0x0205
}
[StructLayout(LayoutKind.Sequential)]
private struct POINT
{
public int x;
public int y;
}
[StructLayout(LayoutKind.Sequential)]
private struct MSLLHOOKSTRUCT
{
public POINT pt;
public uint mouseData;
public uint flags;
public uint time;
public IntPtr dwExtraInfo;
}
[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
private static extern IntPtr SetWindowsHookEx(int idHook,
LowLevelMouseProc lpfn, IntPtr hMod, uint dwThreadId);
[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
[return: MarshalAs(UnmanagedType.Bool)]
private static extern bool UnhookWindowsHookEx(IntPtr hhk);
[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
private static extern IntPtr CallNextHookEx(IntPtr hhk, int nCode,
IntPtr wParam, IntPtr lParam);
[DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
private static extern IntPtr GetModuleHandle(string lpModuleName);
}
}