c++ - 如何在 Windows 窗体/C++ 中将文本或数字旋转 90°？

Question

我想在 Windows 窗体应用程序 Visual Studio 2010 (C++) 中将一段文本或一个数字旋转 90°。有没有简单的方法可以做到这一点？

Answer 1

您必须创建一个 LOGFONT并使用 lfEscapement 和 lfOrientation 的值，如下所示:

SetGraphicsMode(hdc, GM_ADVANCED);

LOGFONT font          = {0};

font.lfHeight         = 0;
font.lfWidth          = 0;
font.lfEscapement     = 900; // here
font.lfOrientation    = 900; // and here
font.lfWeight         = 0;
font.lfItalic         = false;
font.lfUnderline      = false;
font.lfStrikeOut      = false;
font.lfCharSet        = DEFAULT_CHARSET;
font.lfOutPrecision   = OUT_DEFAULT_PRECIS;
font.lfClipPrecision  = CLIP_DEFAULT_PRECIS;
font.lfQuality        = CLEARTYPE_QUALITY;
font.lfPitchAndFamily = DEFAULT_PITCH | FF_DONTCARE;

auto newfont = CreateFontIndirect(&font);
auto oldfont = SelectObject(hdc, newfont);

/* do actual drawing here */

SelectObject(hdc, oldfont);

SetGraphicsMode(hdc, GM_COMPATIBLE);

DeleteObject(newfont);