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- /*-----------------------------------------
- WHATSIZE.C -- What Size is the Window?
- (c) Charles Petzold, 1998
- -----------------------------------------*/
-
- #include <windows.h>
-
- LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;
-
- int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
- PSTR szCmdLine, int iCmdShow)
- {
- static TCHAR szAppName[] = TEXT ("WhatSize") ;
- HWND hwnd ;
- MSG msg ;
- WNDCLASS wndclass ;
-
- wndclass.style = CS_HREDRAW | CS_VREDRAW;
- wndclass.lpfnWndProc = WndProc ;
- wndclass.cbClsExtra = 0 ;
- wndclass.cbWndExtra = 0 ;
- wndclass.hInstance = hInstance ;
- wndclass.hIcon = LoadIcon (NULL, IDI_APPLICATION) ;
- wndclass.hCursor = LoadCursor (NULL, IDC_ARROW) ;
- wndclass.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH) ;
- wndclass.lpszMenuName = NULL ;
- wndclass.lpszClassName = szAppName ;
-
- if (!RegisterClass (&wndclass))
- {
- MessageBox (NULL, TEXT ("This program requires Windows NT!"),
- szAppName, MB_ICONERROR) ;
- return 0 ;
- }
-
- hwnd = CreateWindow (szAppName, TEXT ("What Size is the Window?"),
- WS_OVERLAPPEDWINDOW,
- CW_USEDEFAULT, CW_USEDEFAULT,
- CW_USEDEFAULT, CW_USEDEFAULT,
- NULL, NULL, hInstance, NULL) ;
-
- ShowWindow (hwnd, iCmdShow) ;
- UpdateWindow (hwnd) ;
-
- while (GetMessage (&msg, NULL, 0, 0))
- {
- TranslateMessage (&msg) ;
- DispatchMessage (&msg) ;
- }
- return msg.wParam ;
- }
-
- void Show (HWND hwnd, HDC hdc, int xText, int yText, int iMapMode,
- TCHAR * szMapMode)
- {
- TCHAR szBuffer [60] ;
- RECT rect ;
-
- SaveDC (hdc) ;
-
- SetMapMode (hdc, iMapMode) ;
- GetClientRect (hwnd, &rect) ;
- DPtoLP (hdc, (PPOINT) &rect, 2) ;
-
- RestoreDC (hdc, -1) ;
-
- TextOut (hdc, xText, yText, szBuffer,
- wsprintf (szBuffer, TEXT ("%-20s %7d %7d %7d %7d"), szMapMode,
- rect.left, rect.right, rect.top, rect.bottom)) ;
- }
-
- LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
- {
- static TCHAR szHeading [] =
- TEXT ("Mapping Mode Left Right Top Bottom") ;
- static TCHAR szUndLine [] =
- TEXT ("------------ ---- ----- --- ------") ;
- static int cxChar, cyChar ;
- HDC hdc ;
- PAINTSTRUCT ps ;
- TEXTMETRIC tm ;
-
- switch (message)
- {
- case WM_CREATE:
- hdc = GetDC (hwnd) ;
- SelectObject (hdc, GetStockObject (SYSTEM_FIXED_FONT)) ;
-
- GetTextMetrics (hdc, &tm) ;
- cxChar = tm.tmAveCharWidth ;
- cyChar = tm.tmHeight + tm.tmExternalLeading ;
-
- ReleaseDC (hwnd, hdc) ;
- return 0 ;
-
- case WM_PAINT:
- hdc = BeginPaint (hwnd, &ps) ;
- SelectObject (hdc, GetStockObject (SYSTEM_FIXED_FONT)) ;
-
- SetMapMode (hdc, MM_ANISOTROPIC) ;
- SetWindowExtEx (hdc, 1, 1, NULL) ;
- SetViewportExtEx (hdc, cxChar, cyChar, NULL) ;
-
- TextOut (hdc, 1, 1, szHeading, lstrlen (szHeading)) ;
- TextOut (hdc, 1, 2, szUndLine, lstrlen (szUndLine)) ;
-
- Show (hwnd, hdc, 1, 3, MM_TEXT, TEXT ("TEXT (pixels)")) ;
- Show (hwnd, hdc, 1, 4, MM_LOMETRIC, TEXT ("LOMETRIC (.1 mm)")) ;
- Show (hwnd, hdc, 1, 5, MM_HIMETRIC, TEXT ("HIMETRIC (.01 mm)")) ;
- Show (hwnd, hdc, 1, 6, MM_LOENGLISH, TEXT ("LOENGLISH (.01 in)")) ;
- Show (hwnd, hdc, 1, 7, MM_HIENGLISH, TEXT ("HIENGLISH (.001 in)")) ;
- Show (hwnd, hdc, 1, 8, MM_TWIPS, TEXT ("TWIPS (1/1440 in)")) ;
-
- EndPaint (hwnd, &ps) ;
- return 0 ;
-
- case WM_DESTROY:
- PostQuitMessage (0) ;
- return 0 ;
- }
- return DefWindowProc (hwnd, message, wParam, lParam) ;
- }
-