public static SafeHCURSOR CopyCursor(HCURSOR pcur)
{
var safeHIcon = CopyIcon(new HICON((IntPtr)pcur));
var ptr = safeHIcon.DangerousGetHandle();
safeHIcon.SetHandleAsInvalid();
return(new SafeHCURSOR(ptr, true));
}
public static CursorHandle LoadCursorFromFile(string path)
{
HCURSOR handle = Imports.LoadCursorFromFileW(path);
if (handle.IsInvalid)
{
Error.ThrowLastError(path);
}
return(new CursorHandle(handle, ownsHandle: false));
}
public static unsafe CursorHandle LoadCursor(CursorId id)
{
HCURSOR handle = Imports.LoadCursorW(ModuleInstance.Null, (char *)(uint)id);
if (handle.IsInvalid)
{
Error.ThrowLastError(id.ToString());
}
return(new CursorHandle(handle, ownsHandle: false));
}
public static unsafe CursorHandle LoadCursor(CursorId id)
{
HCURSOR handle = Imports.LoadCursorW(ModuleInstance.Null, (char *)(uint)id);
if (handle.IsInvalid)
{
throw Error.GetExceptionForLastError();
}
return(new CursorHandle(handle, ownsHandle: false));
}
/// <summary>Initializes a new instance of the <see cref="WindowClass"/> class and registers the class name.</summary>
/// <param name="className">
/// <para>
/// A string that specifies the window class name. The class name can be any name registered with RegisterClass or RegisterClassEx,
/// or any of the predefined control-class names.
/// </para>
/// <para>
/// The maximum length for <c>lpszClassName</c> is 256. If <c>lpszClassName</c> is greater than the maximum length, the
/// RegisterClassEx function will fail.
/// </para>
/// </param>
/// <param name="hInst">A handle to the instance that contains the window procedure for the class.</param>
/// <param name="wndProc">
/// A pointer to the window procedure. You must use the CallWindowProc function to call the window procedure. For more information,
/// see WindowProc.
/// </param>
/// <param name="styles">The class style(s). This member can be any combination of the Class Styles.</param>
/// <param name="hIcon">
/// A handle to the class icon. This member must be a handle to an icon resource. If this member is <c>NULL</c>, the system provides
/// a default icon.
/// </param>
/// <param name="hSmIcon">
/// A handle to a small icon that is associated with the window class. If this member is <c>NULL</c>, the system searches the icon
/// resource specified by the <c>hIcon</c> member for an icon of the appropriate size to use as the small icon.
/// </param>
/// <param name="hCursor">
/// A handle to the class cursor. This member must be a handle to a cursor resource. If this member is <c>NULL</c>, an application
/// must explicitly set the cursor shape whenever the mouse moves into the application's window.
/// </param>
/// <param name="hbrBkgd">
/// A handle to the class background brush. This member can be a handle to the brush to be used for painting the background, or it
/// can be a color value. A color value must be one of the following standard system colors (the value 1 must be added to the chosen color).
/// <para>
/// The system automatically deletes class background brushes when the class is unregistered by using <see cref="UnregisterClass"/>.
/// An application should not delete these brushes.
/// </para>
/// <para>
/// When this member is <c>NULL</c>, an application must paint its own background whenever it is requested to paint in its client
/// area. To determine whether the background must be painted, an application can either process the WM_ERASEBKGND message or test
/// the <c>fErase</c> member of the PAINTSTRUCT structure filled by the BeginPaint function.
/// </para>
/// </param>
/// <param name="menuName">
/// A string that specifies the resource name of the class menu, as the name appears in the resource file. If you use an integer to
/// identify the menu, use the MAKEINTRESOURCE macro. If this member is <c>NULL</c>, windows belonging to this class have no default menu.
/// </param>
/// <param name="extraBytes">
/// The number of extra bytes to allocate following the window-class structure. The system initializes the bytes to zero.
/// </param>
/// <param name="extraWinBytes">
/// The number of extra bytes to allocate following the window instance. The system initializes the bytes to zero. If an application
/// uses <c>WNDCLASSEX</c> to register a dialog box created by using the <c>CLASS</c> directive in the resource file, it must set
/// this member to <c>DLGWINDOWEXTRA</c>.
/// </param>
public WindowClass(string className, HINSTANCE hInst, WindowProc wndProc, WindowClassStyles styles = 0, HICON hIcon = default, HICON hSmIcon = default,
HCURSOR hCursor = default, HBRUSH hbrBkgd = default, string menuName = null, int extraBytes = 0, int extraWinBytes = 0)
{
// TODO: Find way to hold on to wndProc ref
wc = new WNDCLASSEX
{
cbSize = (uint)Marshal.SizeOf(typeof(WNDCLASSEX)),
lpfnWndProc = wndProc,
hInstance = hInst,
lpszClassName = className,
style = styles,
hIcon = hIcon,
hIconSm = hSmIcon,
hCursor = hCursor,
hbrBackground = hbrBkgd,
lpszMenuName = menuName,
cbClsExtra = extraBytes,
cbWndExtra = extraWinBytes,
};
Atom = Win32Error.ThrowLastErrorIfNull(Macros.MAKEINTATOM(RegisterClassEx(wc)));
}
public CursorHandle(HCURSOR handle, bool ownsHandle = true)
{
HCURSOR = handle;
_ownsHandle = ownsHandle;
}
public static extern HCURSOR SetCursor(HCURSOR hCursor);
public static extern HCURSOR SetCursor(HCURSOR hCursor);
// Not using SafeCursorHandle as system destroys this cursor. public static extern bool SetSystemCursor(HCURSOR hcur, OCR id);
public static extern bool DestroyCursor(HCURSOR hCursor);
