/// <summary>
/// Replaces the specified system cursor with the given cursor. The cursor will
/// be destroyed and as such must not be loaded from a resource. Use CopyCursor
/// on cursors loaded from resources before calling this method.
/// </summary>
public static void SetSystemCursor(CursorHandle cursor, SystemCursor id)
{
if (!Imports.SetSystemCursor(cursor, id))
{
throw Error.GetExceptionForLastError();
}
}
public static CursorHandle CopyCursor(CursorHandle cursor)
{
CursorHandle copy = Imports.CopyCursor(cursor);
if (copy.IsInvalid)
{
Error.ThrowLastError();
}
return(copy);
}
public static CursorHandle CopyCursor(CursorHandle cursor)
{
CursorHandle copy = Imports.CopyCursor(cursor);
if (copy.IsInvalid)
{
throw Error.GetExceptionForLastError();
}
return(copy);
}
/// <summary> /// Replaces the specified system cursor with the given cursor. The cursor will /// be destroyed and as such must not be loaded from a resource. Use CopyCursor /// on cursors loaded from resources before calling this method. /// </summary> public static void SetSystemCursor(CursorHandle cursor, SystemCursor id) => Error.ThrowLastErrorIfFalse(Imports.SetSystemCursor(cursor, id));
public static CursorHandle SetCursor(CursorHandle cursor)
{
return(new CursorHandle(Imports.SetCursor(cursor), ownsHandle: false));
}
public unsafe WindowClass(
string className = default,
ModuleInstance moduleInstance = default,
ClassStyle classStyle = ClassStyle.HorizontalRedraw | ClassStyle.VerticalRedraw,
BrushHandle backgroundBrush = default,
IconHandle icon = default,
IconHandle smallIcon = default,
CursorHandle cursor = default,
string menuName = null,
int menuId = 0,
int classExtraBytes = 0,
int windowExtraBytes = 0)
{
// Handle default values
className = className ?? Guid.NewGuid().ToString();
if (backgroundBrush == default)
{
backgroundBrush = SystemColor.Window;
}
else if (backgroundBrush == BrushHandle.NoBrush)
{
backgroundBrush = default;
}
if (icon == default)
{
icon = IconId.Application;
}
else if (icon == IconHandle.NoIcon)
{
icon = default;
}
if (cursor == default)
{
cursor = CursorId.Arrow;
}
else if (cursor == CursorHandle.NoCursor)
{
cursor = default;
}
// Unfortunately GetHINSTANCE isn't part of .NET Standard
if (moduleInstance == default)
{
var method = typeof(Marshal).GetMethod("GetHINSTANCE");
Module module = Assembly.GetCallingAssembly().Modules.First();
moduleInstance = (IntPtr)method.Invoke(null, new object[] { module });
}
if (menuId != 0 && menuName != null)
{
throw new ArgumentException("Can only set menu name or ID.");
}
_windowProcedure = WindowProcedure;
ModuleInstance = moduleInstance;
_className = className;
_menuName = menuName ?? string.Empty;
_wndClass = new WNDCLASSEX
{
cbSize = (uint)sizeof(WNDCLASSEX),
style = classStyle,
lpfnWndProc = Marshal.GetFunctionPointerForDelegate(_windowProcedure),
cbClassExtra = classExtraBytes,
cbWndExtra = windowExtraBytes,
hInstance = (IntPtr)moduleInstance,
hIcon = icon,
hCursor = cursor,
hbrBackground = backgroundBrush,
hIconSm = smallIcon,
lpszMenuName = (char *)menuId
};
}
public static CursorHandle SetCursor(CursorHandle cursor) => ResourceMethods.SetCursor(cursor);
public unsafe WindowClass(
string?className = default,
ModuleInstance?moduleInstance = default,
ClassStyle classStyle = ClassStyle.HorizontalRedraw | ClassStyle.VerticalRedraw,
BrushHandle backgroundBrush = default,
IconHandle icon = default,
IconHandle smallIcon = default,
CursorHandle cursor = default,
string?menuName = null,
int menuId = 0,
int classExtraBytes = 0,
int windowExtraBytes = 0)
{
// Handle default values
className ??= Guid.NewGuid().ToString();
if (backgroundBrush == default)
{
backgroundBrush = SystemColor.Window;
}
else if (backgroundBrush == BrushHandle.NoBrush)
{
backgroundBrush = default;
}
if (icon == default)
{
icon = IconId.Application;
}
else if (icon == IconHandle.NoIcon)
{
icon = default;
}
if (cursor == default)
{
cursor = CursorId.Arrow;
}
else if (cursor == CursorHandle.NoCursor)
{
cursor = default;
}
moduleInstance ??= new ModuleInstance(Marshal.GetHINSTANCE(Assembly.GetCallingAssembly().Modules.First()));
if (menuId != 0 && menuName != null)
{
throw new ArgumentException($"Can't set both {nameof(menuName)} and {nameof(menuId)}.");
}
_windowProcedure = WindowProcedure;
ModuleInstance = moduleInstance;
_className = className;
_menuName = menuName ?? string.Empty;
_wndClass = new WNDCLASSEX
{
cbSize = (uint)sizeof(WNDCLASSEX),
style = classStyle,
lpfnWndProc = Marshal.GetFunctionPointerForDelegate(_windowProcedure),
cbClassExtra = classExtraBytes,
cbWndExtra = windowExtraBytes,
hInstance = (IntPtr)moduleInstance,
hIcon = icon,
hCursor = cursor,
hbrBackground = backgroundBrush,
hIconSm = smallIcon,
lpszMenuName = (char *)menuId
};
}