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C/C++ Source or Header  |  1989-02-20  |  4.9 KB  |  131 lines
  1. /*----------------------------------------------------
  2.    BUTTONS3.C -- Square Button Demonstration with DLL
  3.   ----------------------------------------------------*/
  4.  
  5. #define INCL_WIN
  6. #define INCL_GPI
  7. #include <os2.h>
  8. #include "sqbtnlib.h"
  9.  
  10. MRESULT EXPENTRY ClientWndProc (HWND, USHORT, MPARAM, MPARAM) ;
  11.  
  12. HAB  hab ;
  13.  
  14. int main (void)
  15.      {
  16.      static CHAR  szClientClass[] = "Buttons3" ;
  17.      static ULONG flFrameFlags = FCF_TITLEBAR      | FCF_SYSMENU |
  18.                                  FCF_SIZEBORDER    | FCF_MINMAX  |
  19.                                  FCF_SHELLPOSITION | FCF_TASKLIST ;
  20.      HMQ          hmq ;
  21.      HWND         hwndFrame, hwndClient ;
  22.      QMSG         qmsg ;
  23.  
  24.      hab = WinInitialize (0) ;
  25.      hmq = WinCreateMsgQueue (hab, 0) ;
  26.  
  27.      WinRegisterClass (hab, szClientClass, ClientWndProc, CS_SIZEREDRAW, 0) ;
  28.  
  29.      hwndFrame = WinCreateStdWindow (HWND_DESKTOP, WS_VISIBLE,
  30.                                      &flFrameFlags, szClientClass, NULL,
  31.                      0L, NULL, 0, &hwndClient) ;
  32.  
  33.      WinSendMsg (hwndFrame, WM_SETICON,
  34.                  WinQuerySysPointer (HWND_DESKTOP, SPTR_APPICON, FALSE),
  35.                  NULL) ;
  36.  
  37.      while (WinGetMsg (hab, &qmsg, NULL, 0, 0))
  38.           WinDispatchMsg (hab, &qmsg) ;
  39.  
  40.      WinDestroyWindow (hwndFrame) ;
  41.      WinDestroyMsgQueue (hmq) ;
  42.      WinTerminate (hab) ;
  43.      return 0 ;
  44.      }
  45.  
  46. MRESULT EXPENTRY ClientWndProc (HWND hwnd, USHORT msg, MPARAM mp1, MPARAM mp2)
  47.      {
  48.      static CHAR  szSqBtnClass [] = "SqBtn",
  49.                   *szButtonLabel [] = { "Smaller", "Larger" } ;
  50.      static HWND  hwndFrame, hwndButton [2] ;
  51.      static SHORT cxClient, cyClient, cxChar, cyChar ;
  52.      FONTMETRICS  fm ;
  53.      HPS          hps ;
  54.      SHORT        id ;
  55.      RECTL        rcl ;
  56.  
  57.      switch (msg)
  58.           {
  59.           case WM_CREATE :
  60.                hwndFrame = WinQueryWindow (hwnd, QW_PARENT, FALSE) ;
  61.  
  62.                hps = WinGetPS (hwnd) ;
  63.                GpiQueryFontMetrics (hps, (LONG) sizeof fm, &fm) ;
  64.                cxChar = (SHORT) fm.lAveCharWidth ;
  65.                cyChar = (SHORT) fm.lMaxBaselineExt ;
  66.                WinReleasePS (hps) ;
  67.  
  68.                RegisterSqBtnClass (hab) ;
  69.  
  70.                for (id = 0 ; id < 2 ; id++)
  71.                     hwndButton [id] = WinCreateWindow (
  72.                                         hwnd,               // Parent
  73.                                         "SqBtn",            // Class
  74.                                         szButtonLabel [id], // Text
  75.                                         WS_VISIBLE,         // Style
  76.                                         0, 0,               // Position
  77.                                         12 * cxChar,        // Width
  78.                                         2 * cyChar,         // Height
  79.                                         hwnd,               // Owner
  80.                                         HWND_BOTTOM,        // Placement
  81.                                         id,                 // ID
  82.                                         NULL,               // Ctrl Data
  83.                                         NULL) ;             // Pres Params
  84.                return 0 ;
  85.  
  86.           case WM_SIZE :
  87.                cxClient = SHORT1FROMMP (mp2) ;
  88.                cyClient = SHORT2FROMMP (mp2) ;
  89.  
  90.                for (id = 0 ; id < 2 ; id++)
  91.                     WinSetWindowPos (hwndButton [id], NULL,
  92.                               cxClient / 2 + (14 * id - 13) * cxChar,
  93.                               (cyClient - 2 * cyChar) / 2,
  94.                               0, 0, SWP_MOVE) ;
  95.                return 0 ;
  96.  
  97.           case WM_COMMAND:
  98.                WinQueryWindowRect (hwnd, &rcl) ;
  99.                WinMapWindowPoints (hwnd, HWND_DESKTOP, (PPOINTL) &rcl, 2) ;
  100.  
  101.                switch (COMMANDMSG(&msg)->cmd)               // Child ID
  102.                     {
  103.                     case 0:                                 // "Smaller"
  104.                          rcl.xLeft   += cxClient / 20 ;
  105.                          rcl.xRight  -= cxClient / 20 ;
  106.                          rcl.yBottom += cyClient / 20 ;
  107.                          rcl.yTop    -= cyClient / 20 ;
  108.                          break ;
  109.  
  110.                     case 1:                                 // "Larger"
  111.                          rcl.xLeft   -= cxClient / 20 ;
  112.                          rcl.xRight  += cxClient / 20 ;
  113.                          rcl.yBottom -= cyClient / 20 ;
  114.                          rcl.yTop    += cyClient / 20 ;
  115.                          break ;
  116.                     }
  117.                WinCalcFrameRect (hwndFrame, &rcl, FALSE) ;
  118.  
  119.                WinSetWindowPos (hwndFrame, NULL,
  120.                 (SHORT) rcl.xLeft, (SHORT) rcl.yBottom,
  121.                 (SHORT) rcl.xRight - (SHORT) rcl.xLeft,
  122.                 (SHORT) rcl.yTop   - (SHORT) rcl.yBottom,
  123.                 SWP_MOVE | SWP_SIZE) ;
  124.                return 0 ;
  125.  
  126.           case WM_ERASEBACKGROUND:
  127.                return 1 ;
  128.           }
  129.      return WinDefWindowProc (hwnd, msg, mp1, mp2) ;
  130.      }
  131.