public static int FillRect(IHandle hDC, ref RECT lprc, Gdi32.HBRUSH hbr)
{
int result = FillRect((Gdi32.HDC)hDC.Handle, ref lprc, hbr);
GC.KeepAlive(hDC);
return(result);
}
private static void DrawAndFillEllipse(Gdi32.HDC hdc, Gdi32.HPEN borderPen, Gdi32.HBRUSH fieldBrush, Rectangle bounds)
{
Debug.Assert(!hdc.IsNull, "Calling DrawAndFillEllipse with null wg");
if (hdc.IsNull)
{
return;
}
hdc.FillRectangle(fieldBrush, new Rectangle(bounds.X + 2, bounds.Y + 2, 8, 8));
hdc.FillRectangle(fieldBrush, new Rectangle(bounds.X + 4, bounds.Y + 1, 4, 10));
hdc.FillRectangle(fieldBrush, new Rectangle(bounds.X + 1, bounds.Y + 4, 10, 4));
hdc.DrawLine(borderPen, new Point(bounds.X + 4, bounds.Y + 0), new Point(bounds.X + 8, bounds.Y + 0));
hdc.DrawLine(borderPen, new Point(bounds.X + 4, bounds.Y + 11), new Point(bounds.X + 8, bounds.Y + 11));
hdc.DrawLine(borderPen, new Point(bounds.X + 2, bounds.Y + 1), new Point(bounds.X + 4, bounds.Y + 1));
hdc.DrawLine(borderPen, new Point(bounds.X + 8, bounds.Y + 1), new Point(bounds.X + 10, bounds.Y + 1));
hdc.DrawLine(borderPen, new Point(bounds.X + 2, bounds.Y + 10), new Point(bounds.X + 4, bounds.Y + 10));
hdc.DrawLine(borderPen, new Point(bounds.X + 8, bounds.Y + 10), new Point(bounds.X + 10, bounds.Y + 10));
hdc.DrawLine(borderPen, new Point(bounds.X + 0, bounds.Y + 4), new Point(bounds.X + 0, bounds.Y + 8));
hdc.DrawLine(borderPen, new Point(bounds.X + 11, bounds.Y + 4), new Point(bounds.X + 11, bounds.Y + 8));
hdc.DrawLine(borderPen, new Point(bounds.X + 1, bounds.Y + 2), new Point(bounds.X + 1, bounds.Y + 4));
hdc.DrawLine(borderPen, new Point(bounds.X + 1, bounds.Y + 8), new Point(bounds.X + 1, bounds.Y + 10));
hdc.DrawLine(borderPen, new Point(bounds.X + 10, bounds.Y + 2), new Point(bounds.X + 10, bounds.Y + 4));
hdc.DrawLine(borderPen, new Point(bounds.X + 10, bounds.Y + 8), new Point(bounds.X + 10, bounds.Y + 10));
}
private unsafe void CreateDitherBrush()
{
Debug.Assert(_hbrushDither.IsNull, "Brush should not be recreated.");
short *patternBits = stackalloc short[]
{
unchecked ((short)0xAAAA),
unchecked ((short)0x5555),
unchecked ((short)0xAAAA),
unchecked ((short)0x5555),
unchecked ((short)0xAAAA),
unchecked ((short)0x5555),
unchecked ((short)0xAAAA),
unchecked ((short)0x5555)
};
Gdi32.HBITMAP hbitmapTemp = Gdi32.CreateBitmap(8, 8, 1, 1, patternBits);
Debug.Assert(
!hbitmapTemp.IsNull,
"could not create dither bitmap. Page selector UI will not be correct");
if (!hbitmapTemp.IsNull)
{
_hbrushDither = Gdi32.CreatePatternBrush(hbitmapTemp);
Debug.Assert(
!_hbrushDither.IsNull,
"Unable to created dithered brush. Page selector UI will not be correct");
Gdi32.DeleteObject(hbitmapTemp);
}
}
internal static void FillRectangle(this Gdi32.HDC hdc, Rectangle rectangle, Gdi32.HBRUSH hbrush)
{
RECT rect = rectangle;
User32.FillRect(
hdc,
ref rect,
hbrush);
}
internal static void FillRectangle(this Gdi32.HDC hdc, Gdi32.HBRUSH brush, Rectangle rectangle)
{
Debug.Assert(!brush.IsNull, "brush == null");
RECT rect = rectangle;
User32.FillRect(
hdc,
ref rect,
brush);
}
internal static void FillRectangle(this Gdi32.HDC hdc, Rectangle rectangle, Gdi32.HBRUSH hbrush)
{
Debug.Assert(!hbrush.IsNull);
RECT rect = rectangle;
User32.FillRect(
hdc,
ref rect,
hbrush);
}
protected override void OnHandleDestroyed(EventArgs e)
{
base.OnHandleDestroyed(e);
if (!RecreatingHandle && !_hbrushDither.IsNull)
{
Gdi32.DeleteObject(_hbrushDither);
_hbrushDither = default;
}
}
protected virtual void Dispose(bool disposing)
{
if (DC != null && !_nativeHandle.IsNull)
{
DC.DeleteObject(_nativeHandle, GdiObjectType.Brush);
_nativeHandle = default;
}
if (disposing)
{
GC.SuppressFinalize(this);
}
}
internal static void DrawAndFillEllipse(
this Gdi32.HDC hdc,
Gdi32.HPEN pen,
Gdi32.HBRUSH brush,
int left,
int top,
int right,
int bottom)
{
using var penSelection = pen.IsNull ? default : new Gdi32.SelectObjectScope(hdc, pen);
using var brushSelection = brush.IsNull ? default : new Gdi32.SelectObjectScope(hdc, brush);
Gdi32.Ellipse(hdc, left, top, right, bottom);
}
public static extern int FillRect(Gdi32.HDC hDC, ref RECT lprc, Gdi32.HBRUSH hbr);
internal static void FillRectangle(this DeviceContextHdcScope hdc, Rectangle rectangle, Gdi32.HBRUSH hbrush) => FillRectangle(hdc.HDC, rectangle, hbrush);
internal static void FillRectangle(this User32.GetDcScope hdc, Gdi32.HBRUSH hbrush, Rectangle rectangle) => FillRectangle(hdc.HDC, hbrush, rectangle);
internal static void DrawAndFillEllipse(
this DeviceContextHdcScope hdc,
Gdi32.HPEN pen,
Gdi32.HBRUSH brush,
Rectangle bounds)
=> DrawAndFillEllipse(hdc.HDC, pen, brush, bounds.Left, bounds.Top, bounds.Right, bounds.Bottom);
protected override void CreateBrush()
{
Gdi32.HBRUSH nativeHandle = Gdi32.CreateSolidBrush(ColorTranslator.ToWin32(Color));
Debug.Assert(!nativeHandle.IsNull);
HBrush = nativeHandle;
}
internal static void FillRectangle(this Gdi32.CreateDcScope hdc, Rectangle rectangle, Gdi32.HBRUSH hbrush) => FillRectangle(hdc.HDC, rectangle, hbrush);
internal static void DrawAndFillEllipse(this Gdi32.HDC hdc, Gdi32.HPEN pen, Gdi32.HBRUSH brush, Rectangle bounds) => DrawEllipse(hdc, pen, brush, bounds.Left, bounds.Top, bounds.Right, bounds.Bottom);
/// <summary>
/// Constructor.
/// </summary>
/// <param name="className">Name, or default will be generated.</param>
/// <param name="moduleInstance">Module to associate with the window. The entry assembly is the default.</param>
/// <param name="backgroundBrush">Use (IntPtr)(-1) for no background brush.</param>
/// <param name="icon">Use (IntPtr)(-1) for no icon.</param>
/// <param name="cursor">Use (IntPtr)(-1) for no cursor.</param>
/// <param name="menuName">Menu name, can not set with <paramref name="menuId"/>.</param>
/// <param name="menuId">Menu id, can not set with <paramref name="menuName"/>.</param>
public unsafe WindowClass(
string className = default,
IntPtr moduleInstance = default,
User32.CS classStyle = User32.CS.HREDRAW | User32.CS.VREDRAW,
Gdi32.HBRUSH backgroundBrush = default,
IntPtr icon = default,
IntPtr cursor = default,
string menuName = null,
int menuId = 0,
int classExtraBytes = 0,
int windowExtraBytes = 0)
{
// Handle default values
className ??= Guid.NewGuid().ToString();
if (backgroundBrush.IsNull)
{
backgroundBrush = User32.GetSysColorBrush(User32.COLOR.WINDOW);
}
else if (backgroundBrush.Handle == (IntPtr)(-1))
{
backgroundBrush = default;
}
if (icon == default)
{
icon = LoadIconW(IntPtr.Zero, (IntPtr)IDI_APPLICATION);
}
else if (icon == (IntPtr)(-1))
{
icon = default;
}
if (cursor == default)
{
cursor = User32.LoadCursorW(IntPtr.Zero, (IntPtr)User32.CursorResourceId.IDC_ARROW);
}
else if (cursor == (IntPtr)(-1))
{
cursor = default;
}
if (moduleInstance == IntPtr.Zero)
{
Marshal.GetHINSTANCE(Assembly.GetCallingAssembly().Modules.First());
}
if (menuId != 0 && menuName != null)
{
throw new ArgumentException($"Can't set both {nameof(menuName)} and {nameof(menuId)}.");
}
_windowProcedure = WNDPROC;
ModuleInstance = moduleInstance;
_className = className;
_menuName = menuName ?? string.Empty;
_wndClass = new User32.WNDCLASS
{
style = classStyle,
lpfnWndProc = Marshal.GetFunctionPointerForDelegate(_windowProcedure),
cbClsExtra = classExtraBytes,
cbWndExtra = windowExtraBytes,
hInstance = moduleInstance,
hIcon = icon,
hCursor = cursor,
hbrBackground = backgroundBrush,
lpszMenuName = (char *)menuId
};
}
public static partial int FillRect(Gdi32.HDC hDC, ref RECT lprc, Gdi32.HBRUSH hbr);
