向hellovfp大哥及各位论坛大牛请教关于windows编程文字输出的问题
程序代码：
void skyline_OnPaint(HWND hWnd)
{
PAINTSTRUCT PaintStruct;
HFONT OldFont;
HDC PaintDC = BeginPaint(hWnd, &PaintStruct);
if (choice == StockFont)
{
OldFont = SelectFont(PaintDC, TheFont);
GetTextFace(PaintDC, sizeof(aFaceName), (LPSTR)aFaceName);
GetTextMetrics(PaintDC, &TextMets);
SetTextColor(PaintDC, RGB(rand()%255, rand()%255, rand()%255));
TextOut(PaintDC, 10, 10, aFaceName, strlen(aFaceName));
TextOut(PaintDC, 10, 30, "Stock Font", 11);
TextOut(PaintDC, 10, 50, "Ten Letters", 11);
SelectFont(PaintDC, OldFont);
}
else
{
for (int i = 0; i <= 3; i++)
{
TheFont = GetFont(900 * i, FontChoice[choice]);
OldFont = SelectFont(PaintDC, TheFont);
SetTextColor(PaintDC, RGB(rand()%255, rand()%255, rand()%255));
TextOut(PaintDC, 200, 200, "skyline!", 8 );
GetTextFace(PaintDC, sizeof(aFaceName), (LPSTR)aFaceName);
GetTextMetrics(PaintDC, &TextMets);
SelectFont(PaintDC, OldFont);
}
TextOut(PaintDC, 10, 10, aFaceName, strlen(aFaceName));
}
EndPaint(hWnd, &PaintStruct);
}上面是打印skyline!这行文字的旋转字体的WM_PAINT消息函数， 我把相关的变量和定义贴上
程序代码：static LOGFONT LogFont;
static HFONT TheFont;
static char aFaceName[80];
TEXTMETRIC TextMets;
char * FontChoice[] = {"New Times Roman", "Arial", "Symbol", "StockFont"};
enum TChoice {Roman, Swiss, Symbol, StockFont};
TChoice choice;关于choice是在WM_COMMAND下处理的
程序代码：////////////////////////////////////
// Handle WM_COMMAND
////////////////////////////////////
#pragma argsused
void skyline_OnCommand(HWND hWnd, int id, HWND hWndCtl, UINT codeNotify)
{
char s[500];
switch (id)
{
case CM_INFO:
{
GetFontString(s, TextMets, aFaceName);
MessageBox(hWnd, s, "Font Info", MB_OK);
break;
}
case CM_ROMAN:
{
choice = Roman;
InvalidateRect(hWnd, NULL, TRUE);
break;
}
case CM_SWISS:
{
choice = Swiss;
InvalidateRect(hWnd, NULL, TRUE);
break;
}
case CM_SYMBOL:
{
choice = Symbol;
InvalidateRect(hWnd, NULL, TRUE);
break;
}
case CM_ANSI_FIXED_FONT:
{
if (TheFont != 0)
DeleteFont(TheFont);
TheFont = GetStockFont(ANSI_FIXED_FONT);
choice = StockFont;
InvalidateRect(hWnd, NULL, TRUE);
break;
}
case CM_ANSI_VAR_FONT:
{
if (TheFont != 0)
DeleteFont(TheFont);
TheFont = GetStockFont(ANSI_VAR_FONT);
choice = StockFont;
InvalidateRect(hWnd, NULL, TRUE);
break;
}
case CM_DEVICE_DEFAULT_FONT:
{
if (TheFont != 0)
DeleteFont(TheFont);
TheFont = GetStockFont(DEVICE_DEFAULT_FONT);
choice = StockFont;
InvalidateRect(hWnd, NULL, TRUE);
break;
}
case CM_OEM_FIXED_FONT:
{
if (TheFont != 0)
DeleteFont(TheFont);
TheFont = GetStockFont(OEM_FIXED_FONT);
choice = StockFont;
InvalidateRect(hWnd, NULL, TRUE);
break;
}
case CM_SYSTEM_FONT:
{
if (TheFont != 0)
DeleteFont(TheFont);
TheFont = GetStockFont(SYSTEM_FONT);
choice = StockFont;
InvalidateRect(hWnd, NULL, TRUE);
break;
}
case CM_SYSTEM_FIXED_FONT:
{
if (TheFont != 0)
DeleteFont(TheFont);
TheFont = GetStockFont(SYSTEM_FIXED_FONT);
choice = StockFont;
InvalidateRect(hWnd, NULL, TRUE);
break;
}
}
}
GetFont（）函数是自定义的
程序代码：HFONT GetFont(int Escapement, char *Name)
{
memset(&LogFont, 0, sizeof(LOGFONT));
LogFont.lfHeight = 60;
LogFont.lfWidth = 50;
LogFont.lfWeight = 900;
LogFont.lfEscapement = Escapement;
LogFont.lfItalic = 1;
LogFont.lfUnderline = 1;
LogFont.lfStrikeOut = 1;
LogFont.lfOutPrecision = OUT_STROKE_PRECIS;
LogFont.lfClipPrecision = CLIP_STROKE_PRECIS;
LogFont.lfQuality = PROOF_QUALITY;
strcpy(LogFont.lfFaceName, Name);
if (TheFont != 0)
{
DeleteFont(TheFont);
}
TheFont = CreateFontIndirect(&LogFont);
return TheFont;
}针对这些代码有问题如下 ：
1. 去查了下SelectFont 看不太明白 MSDN上没看到这个 貌似不是个函数 是个宏吧 他在干什么的 有啥子用处？
2. 查了下StockFont 应该是对应的六种字体吧 在 char * FontChoice[] = {"New Times Roman", "Arial", "Symbol", "StockFont"};中他和其他的字符串应该有相似的含义吧，那为什么
enum TChoice {Roman, Swiss, Symbol, StockFont};中的“Arial”和Swiss不对应？ 为什么把if (choice == StockFont)作为一个单独条件提出来?
3.aFaceName 究竟是个什么样的字符串 他的内容是什么 从哪里获取的 我曾经单独立出个工程就打印他 并给他先赋值然后用TextOut()函数输出 结果无论我怎么改变赋值的内容他都打印出 System ？GetTextFace（）的源字符串和目的字符串都是谁？
4关于GetTextMetrics（）百度解释是：该函数把程序当前的字体信息，存放到TEXTMETRIC（即MSDN原文中的specified buffer）中，也就是说这不是个输出函数 是获取函数 ，但是在这段程序中他究竟有个什么作用 会对后面有什么影响？
先问这么多 一大篇啊 麻烦看看。
。
表示鸭梨很大。