Exemplo n.º 1
0
        public static void DrawString(Control context, Font font, string text, Rectangle textBounds, bool useMnemonics, GdiTextDrawMode textMode)
        {
            IntPtr hdc = User32.GetDC(context.Handle);
            try
            {
                Gdi32.SetBkColor(hdc, Gdi32.ToColorRef(context.BackColor));
                Gdi32.SetTextColor(hdc, Gdi32.ToColorRef(context.ForeColor));

                try
                {
                    IntPtr hFont = font.ToHfont();
                    try
                    {
                        IntPtr hPrevFont = Gdi32.SelectObject(hdc, hFont);
                        try
                        {
                            StringBuilder sb = new StringBuilder(text);
                            RECT rect = textBounds;
                            User32.DRAWTEXTPARAMS dtparams = new User32.DRAWTEXTPARAMS();
                            dtparams.cbSize = (uint)Marshal.SizeOf(typeof(User32.DRAWTEXTPARAMS));
                            User32.DT flags =
                                textMode == GdiTextDrawMode.EndEllipsis ? User32.DT.END_ELLIPSIS
                                : textMode == GdiTextDrawMode.WordBreak ? User32.DT.WORDBREAK | User32.DT.END_ELLIPSIS
                                : User32.DT.WORDBREAK;
                            if (useMnemonics)
                                flags |= User32.DT.NOPREFIX;

                            if (0 == User32.DrawTextEx(hdc, sb, sb.Length, ref rect, flags, ref dtparams))
                                throw new Win32Exception(Marshal.GetLastWin32Error());
                        }
                        finally
                        {
                            Gdi32.SelectObject(hdc, hPrevFont);
                        }
                    }
                    finally
                    {
                        Gdi32.DeleteObject(hFont);
                    }
                }
                finally
                {
                }
            }
            finally
            {
                User32.ReleaseDC(context.Handle, hdc);
            }

        }
Exemplo n.º 2
0
        public static Rectangle MeasureString(Control context, Font font, string text, Rectangle textBounds)
        {
            IntPtr hdc = User32.GetDC(context.Handle);
            try
            {
                IntPtr hFont = font.ToHfont();
                try
                {
                    IntPtr hPrevFont = Gdi32.SelectObject(hdc, hFont);
                    try
                    {
                        StringBuilder sb = new StringBuilder(text);
                        RECT rect = textBounds;
                        rect.bottom = rect.top; // set height to 0
                        User32.DRAWTEXTPARAMS dtparams = new User32.DRAWTEXTPARAMS();
                        dtparams.cbSize = (uint)Marshal.SizeOf(typeof(User32.DRAWTEXTPARAMS));
                        if (0 == User32.DrawTextEx(hdc, sb, sb.Length, ref rect, User32.DT.CALCRECT | User32.DT.WORDBREAK | User32.DT.END_ELLIPSIS, ref dtparams))
                            throw new Win32Exception(Marshal.GetLastWin32Error());
                        return rect;
                    }
                    finally
                    {
                        Gdi32.SelectObject(hdc, hPrevFont);
                    }
                }
                finally
                {
                    Gdi32.DeleteObject(hFont);
                }
            }
            finally
            {
                User32.ReleaseDC(context.Handle, hdc);
            }

        }