public IWindow CreateWindow(CreateWindowArguments arguments)
{
var nativeWindow = new NativeWindow(arguments.Width, arguments.Height, _eventManager);
var wndClassExA = new WNDCLASSEXA
{
CbClsExtra = 0,
CbSize = Marshal.SizeOf <WNDCLASSEXA>(),
HCursor = IntPtr.Zero,
HIcon = IntPtr.Zero,
LpFnWndProc = nativeWindow.WindowProcedureFunctionPointer,
CbWndExtra = 0,
HIconSm = IntPtr.Zero,
HInstance = Marshal.GetHINSTANCE(GetType().Module),
HbrBackground = IntPtr.Zero,
LpszClassName = arguments.Title + "class",
Style = 0
};
if (User32.RegisterClassExA(ref wndClassExA) == 0)
{
throw new Win32Exception(Marshal.GetLastWin32Error(), "RegisterClassExA failed");
}
const WindowStyles wsStyle = WindowStyles.WS_OVERLAPPEDWINDOW | WindowStyles.WS_VISIBLE;
RECT windowRect = default;
windowRect.Left = 100;
windowRect.Right = arguments.Width + windowRect.Left;
windowRect.Top = 100;
windowRect.Bottom = arguments.Height + windowRect.Top;
User32.AdjustWindowRect(ref windowRect, wsStyle, false);
nativeWindow.Handle = User32.CreateWindowExA(
0,
wndClassExA.LpszClassName,
arguments.Title,
wsStyle,
arguments.X,
arguments.Y,
windowRect.Right - windowRect.Left,
windowRect.Bottom - windowRect.Top,
IntPtr.Zero,
IntPtr.Zero,
wndClassExA.HInstance,
IntPtr.Zero
);
if (nativeWindow.Handle == IntPtr.Zero)
{
throw new Win32Exception(Marshal.GetLastWin32Error(), "CreateWindowExA failed");
}
nativeWindow.ShowWindow();
return(nativeWindow);
}
private void Init(int x, int y, int width, int height, WindowSizeType sizeType, WindowType type, WindowStartupPosition startupPosition)
{
// register window class
var wcex = new WNDCLASSEXA();
wcex.cbSize = (UINT)Marshal.SizeOf <WNDCLASSEXA>();
wcex.style = CS_HREDRAW | CS_VREDRAW;
wndProcDelegate = new WndProcDelegate(WndProc);
#if CS2X
Marshal.GetFunctionPointerForDelegate <WndProcDelegate>(wndProcDelegate, out _, out wcex.lpfnWndProc);
#else
wcex.lpfnWndProc = Marshal.GetFunctionPointerForDelegate <WndProcDelegate>(wndProcDelegate);
#endif
wcex.cbClsExtra = 0;
wcex.cbWndExtra = 0;
wcex.hInstance = Application.hInstance;
//wcex.hIcon = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_WINDOWSDESKTOPVCPP));
//wcex.hIconSm = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL));
wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
var guid = Guid.NewGuid();
string guidString = guid.ToString();
fixed(char *guidStringPtr = guidString)
{
wcex.lpszClassName = (LPCSTR)guidStringPtr; // set class name to guid
atom = RegisterClassExA(&wcex);
}
// create window
RECT rect;
if (startupPosition == WindowStartupPosition.CenterScreen)
{
HWND desktop = GetDesktopWindow();
GetClientRect(desktop, &rect);
x = (rect.right / 2) - (width / 2);
y = (rect.bottom / 2) - (height / 2);
}
else if (startupPosition == WindowStartupPosition.Default)
{
x = unchecked ((int)CW_USEDEFAULT);
y = unchecked ((int)CW_USEDEFAULT);
}
DWORD windowStyle = WS_OVERLAPPEDWINDOW;
switch (type)
{
case WindowType.Tool:
windowStyle ^= WS_MAXIMIZEBOX;
windowStyle ^= WS_MINIMIZEBOX;
windowStyle ^= WS_THICKFRAME; // disable window resize
break;
case WindowType.Popup:
windowStyle = WS_POPUPWINDOW;
break;
}
byte *title = stackalloc byte[1];
title[0] = 0;
hWnd = CreateWindowExA(0, (LPCSTR)atom, (LPCSTR)title, windowStyle, x, y, width, height, HWND.Zero, HMENU.Zero, Application.hInstance, IntPtr.Zero);
if (hWnd == HWND.Zero)
{
throw new Exception("CreateWindowExA failed");
}
// adjust working area / client size and position
if (sizeType == WindowSizeType.WorkingArea)
{
if (GetWindowRect(hWnd, &rect) == 0)
{
throw new Exception("GetWindowRect failed");
}
int rectWidth = rect.right - rect.left;
int rectHeight = rect.bottom - rect.top;
RECT clientRect;
if (GetClientRect(hWnd, &clientRect) == 0)
{
throw new Exception("GetWindowRect failed");
}
int clientRectWidth = clientRect.right - clientRect.left;
int clientRectHeight = clientRect.bottom - clientRect.top;
int offsetX = (rectWidth - clientRectWidth);
int offsetY = (rectHeight - clientRectHeight);
width += offsetX;
height += offsetY;
UINT flags = SWP_NOMOVE;
if (startupPosition == WindowStartupPosition.CenterScreen)
{
flags = 0;
x -= offsetX / 2;
y -= offsetY;
}
if (SetWindowPos(hWnd, HWND.Zero, x, y, width, height, flags) == 0)
{
throw new Exception("SetWindowPos failed");
}
}
// track window
windows.Add(this);
}
