通过行和列设置控制台屏幕尺寸和屏幕缓冲区
Set console screen size and screen buffer by rows and columns
我正在尝试调节控制台，特别是屏幕缓冲区大小和控制台的实际大小，最好是通过字符的行和列。我已经使用SetConsoleScreenBufferSize成功更改了屏幕缓冲区大小，但是我在调整实际窗口本身的问题上存在问题。我尝试使用SetConsoleWindowInfo，它似乎不会影响任何内容，即使它确实想用行/列更改它。最终，我想做到这一点，以便用户也无法调整它的大小。无论如何，这是我相关的说明。
hConsole = CreateConsoleScreenBuffer(
GENERIC_READ | GENERIC_WRITE,
0,
NULL,
CONSOLE_TEXTMODE_BUFFER,
NULL
);
SMALL_RECT size = { 0, 0, 240, 240 }; // Test values
SetConsoleActiveScreenBuffer(hConsole);
SetConsoleScreenBufferSize(hConsole, { width, height });
SetConsoleWindowInfo(hConsole, TRUE, &size);
您可以从MS中看到旧的演示函数： DemoSizeInfo
我将函数转换为unicode =>
#define WSTR1(x) L##x
#define WSTR2(x) WSTR1(x)
#define __WFILE__ WSTR2(__FILE__)
void perr(PWCHAR szFileName, int line, PWCHAR szApiName, DWORD dwError);
#define PERR(bSuccess, api) {if (!(bSuccess)) perr(__WFILE__, __LINE__, api, GetLastError());}
void resizeConBufAndWindow(HANDLE hConsole, SHORT xSize, SHORT ySize);
void demoSizeInfo(HANDLE hConOut);
// Test demo on your hConsole handle
demoSizeInfo(hConsole);
functions =>
void resizeConBufAndWindow(HANDLE hConsole, SHORT xSize, SHORT ySize)
{
CONSOLE_SCREEN_BUFFER_INFO csbi; /* hold current console buffer info */
BOOL bSuccess;
SMALL_RECT srWindowRect; /* hold the new console size */
COORD coordScreen;
bSuccess = GetConsoleScreenBufferInfo(hConsole, &csbi);
PERR(bSuccess, L"GetConsoleScreenBufferInfo");
/* get the largest size we can size the console window to */
coordScreen = GetLargestConsoleWindowSize(hConsole);
PERR(coordScreen.X | coordScreen.Y, L"GetLargestConsoleWindowSize");
/* define the new console window size and scroll position */
srWindowRect.Right = (SHORT)(min(xSize, coordScreen.X) - 1);
srWindowRect.Bottom = (SHORT)(min(ySize, coordScreen.Y) - 1);
srWindowRect.Left = srWindowRect.Top = (SHORT)0;
/* define the new console buffer size */
coordScreen.X = xSize;
coordScreen.Y = ySize;
/* if the current buffer is larger than what we want, resize the */
/* console window first, then the buffer */
if ((DWORD)csbi.dwSize.X * csbi.dwSize.Y > (DWORD)xSize * ySize)
{
bSuccess = SetConsoleWindowInfo(hConsole, TRUE, &srWindowRect);
PERR(bSuccess, L"SetConsoleWindowInfo");
bSuccess = SetConsoleScreenBufferSize(hConsole, coordScreen);
PERR(bSuccess, L"SetConsoleScreenBufferSize");
}
/* if the current buffer is smaller than what we want, resize the */
/* buffer first, then the console window */
if ((DWORD)csbi.dwSize.X * csbi.dwSize.Y < (DWORD)xSize * ySize)
{
bSuccess = SetConsoleScreenBufferSize(hConsole, coordScreen);
PERR(bSuccess, L"SetConsoleScreenBufferSize");
bSuccess = SetConsoleWindowInfo(hConsole, TRUE, &srWindowRect);
PERR(bSuccess, L"SetConsoleWindowInfo");
}
/* if the current buffer *is* the size we want, don't do anything! */
return;
}
/*********************************************************************
* FUNCTION: perr(PCHAR szFileName, int line, PCHAR szApiName, *
* DWORD dwError) *
* *
* PURPOSE: report API errors. Allocate a new console buffer, display *
* error number and error text, restore previous console *
* buffer *
* *
* INPUT: current source file name, current line number, name of the *
* API that failed, and the error number *
* *
* RETURNS: none *
*********************************************************************/
/* maximum size of the buffer to be returned from FormatMessage */
#define MAX_MSG_BUF_SIZE 512
void perr(PWCHAR szFileName, int line, PWCHAR szApiName, DWORD dwError)
{
WCHAR szTemp[1024];
DWORD cMsgLen;
WCHAR *msgBuf; /* buffer for message text from system */
int iButtonPressed; /* receives button pressed in the error box */
/* format our error message */
wsprintf(szTemp, L"%s: Error %d from %s on line %d:n", szFileName,
dwError, szApiName, line);
/* get the text description for that error number from the system */
cMsgLen = FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_ALLOCATE_BUFFER | 40, NULL, dwError,
MAKELANGID(0, SUBLANG_ENGLISH_US), (LPTSTR)&msgBuf, MAX_MSG_BUF_SIZE,
NULL);
if (!cMsgLen)
wsprintf(szTemp + lstrlen(szTemp), L"Unable to obtain error message text! n"
L"%s: Error %d from %s on line %d", __FILE__,
GetLastError(), "FormatMessage", __LINE__);
else
lstrcat(szTemp, msgBuf);
lstrcat(szTemp, L"nnContinue execution?");
MessageBeep(MB_ICONEXCLAMATION);
iButtonPressed = MessageBox(NULL, szTemp, L"Console API Error",
MB_ICONEXCLAMATION | MB_YESNO | MB_SETFOREGROUND);
/* free the message buffer returned to us by the system */
if (cMsgLen)
LocalFree((HLOCAL)msgBuf);
if (iButtonPressed == IDNO)
exit(1);
return;
}
/*************************************************************************
* FUNCTION: myPuts(HANDLE hConsole, PCHAR s) *
* *
* PURPOSE: write a string to the given console buffer, appending a cr/lf *
* *
* INPUT: the console to write to, and the string to write *
* *
* RETURNS: TRUE if success, FALSE if an error occured *
*************************************************************************/
BOOL myPuts(HANDLE hConsole, PWCHAR s)
{
BOOL bSuccess;
DWORD cCharsWritten;
const PWCHAR crlf = L"n";
BOOL retflag = TRUE;
/* write the string to the console */
bSuccess = WriteConsole(hConsole, s, lstrlen(s), &cCharsWritten, NULL);
PERR(bSuccess, L"WriteConsole");
retflag = bSuccess;
/* put a carriage return & line feed after the string */
bSuccess = WriteConsole(hConsole, crlf, lstrlen(crlf), &cCharsWritten, NULL);
PERR(bSuccess, L"WriteConsole");
if (!bSuccess)
retflag = FALSE;
return(retflag);
}
/*********************************************************************
* FUNCTION: setConTitle *
* *
* PURPOSE: simply set the current console title. Called by each demo *
* function to specify the name of the source file that *
* contains the demo function. *
* *
* INPUT: null terminated string *
*********************************************************************/
void setConTitle(PCHAR szTitle)
{
BOOL bSuccess;
/* set the console title to the input string parameter */
bSuccess = SetConsoleTitleA(szTitle);
PERR(bSuccess, L"SetConsoleTitle");
return;
}
/*****************************************************************
* FUNCTION: myGetchar(void) *
* *
* PURPOSE: get a single character from the standard input handle *
* *
* INPUT: none *
* *
* RETURNS: the char received from the console *
*****************************************************************/
WCHAR myGetchar(void)
{
HANDLE hStdIn; /* standard input */
DWORD dwInputMode; /* to save the input mode */
BOOL bSuccess;
WCHAR chBuf; /* buffer to read into */
DWORD dwRead;
/* get the standard input handle to read from. There is only one */
/* instance of standard input per process at any given time */
hStdIn = GetStdHandle(STD_INPUT_HANDLE);
PERR(hStdIn != INVALID_HANDLE_VALUE, L"GetStdHandle");
/* save the console mode */
bSuccess = GetConsoleMode(hStdIn, &dwInputMode);
PERR(bSuccess, L"GetconsoleMode");
/* disable line input. Echo input must be disabled when disabling */
/* line input */
bSuccess = SetConsoleMode(hStdIn, dwInputMode & ~ENABLE_LINE_INPUT &
~ENABLE_ECHO_INPUT);
PERR(bSuccess, L"SetConsoleMode");
/* read a character from the console input */
bSuccess = ReadFile(hStdIn, &chBuf, sizeof(chBuf), &dwRead, NULL);
PERR(bSuccess, L"ReadFile");
/* restore the original console input mode */
bSuccess = SetConsoleMode(hStdIn, dwInputMode);
PERR(bSuccess, L"SetConsoleMode");
return(chBuf);
}
/********************************************************************
* FUNCTION: getConX(HANDLE hCon) *
* *
* PURPROSE: to get the current width of the console output buffer *
* *
* INPUT: the handle to get the information for *
* *
* RETURNS: the width of the current console output buffer, in chars *
********************************************************************/
SHORT getConX(HANDLE hCon)
{
CONSOLE_SCREEN_BUFFER_INFO csbi;
BOOL bSuccess;
bSuccess = GetConsoleScreenBufferInfo(hCon, &csbi);
PERR(bSuccess, L"GetConsoleScreenBufferInfo");
return(csbi.dwSize.X);
}
/*********************************************************************
* FUNCTION: getConY(HANDLE hCon) *
* *
* PURPROSE: to get the current height of the console output buffer *
* *
* INPUT: the handle to get the information for *
* *
* RETURNS: the height of the current console output buffer, in chars *
*********************************************************************/
SHORT getConY(HANDLE hCon)
{
CONSOLE_SCREEN_BUFFER_INFO csbi;
BOOL bSuccess;
bSuccess = GetConsoleScreenBufferInfo(hCon, &csbi);
PERR(bSuccess, L"GetConsoleScreenBufferInfo");
return(csbi.dwSize.Y);
}
void demoSizeInfo(HANDLE hConOut)
{
SHORT sConX, sConY; /* save the current console dimensions */
setConTitle(__FILE__);
myPuts(hConOut, L"Let's resize the console buffer and window to a 40 x 25n"
L"size screen by using the SetConsoleScreenBufferSize andn"
L"SetConsoleWindowInfo APIs. Hit enter to continue...n");
myGetchar();
sConX = getConX(hConOut);
sConY = getConY(hConOut);
resizeConBufAndWindow(hConOut, (SHORT)40, (SHORT)25);
myPuts(hConOut, L"Now let's resize to a large size ofn"
L"200 x 200 - notice that the consolen"
L"window size will not grow larger thann"
L"the physical screen size. Hit entern"
L"to continue...n");
myGetchar();
resizeConBufAndWindow(hConOut, (SHORT)200, (SHORT)200);
myPuts(hConOut, L"Now let's resize back to our original size screen.n"
L"Hit enter to continue...n");
myGetchar();
resizeConBufAndWindow(hConOut, sConX, sConY);
myPuts(hConOut, L"Now we're back to our original size. Hit enter to return...");
myGetchar();
return;
}
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