widgets.c

   1 /*
   2  * Windows widgets (built-in window classes)
   3  *
   4  * Copyright 1993 Alexandre Julliard
   5  */
   6
   7 static char Copyright[] = "Copyright  Alexandre Julliard, 1993";
   8
   9 #include "windows.h"
  10
  11
  12 static LONG WIDGETS_ButtonWndProc( HWND hwnd, WORD message,
  13                                    WORD wParam, LONG lParam );
  14 static LONG WIDGETS_StaticWndProc( HWND hwnd, WORD message,
  15                                    WORD wParam, LONG lParam );
  16
  17 #define NB_BUILTIN_CLASSES  2
  18
  19 static WNDCLASS WIDGETS_BuiltinClasses[NB_BUILTIN_CLASSES] =
  20 {
  21     { 0, WIDGETS_ButtonWndProc, 0, 0, 0, 0, 0, 0, NULL, "BUTTON" },
  22     { 0, WIDGETS_StaticWndProc, 0, 0, 0, 0, 0, 0, NULL, "STATIC" }
  23 };
  24
  25 static FARPROC WndProc32[NB_BUILTIN_CLASSES];
  26
  27
  28 /***********************************************************************
  29  *           WIDGETS_Init
  30  *
  31  * Initialize the built-in window classes.
  32  */
  33 BOOL WIDGETS_Init()
  34 {
  35     int i;
  36     WNDCLASS * pClass = WIDGETS_BuiltinClasses;
  37
  38     for (i = 0; i < NB_BUILTIN_CLASSES; i++, pClass++)
  39     {
  40         WndProc32[i] = pClass->lpfnWndProc;
  41         pClass->lpfnWndProc = (FARPROC) i+1;
  42         if (!RegisterClass(pClass)) return FALSE;
  43     }
  44     return TRUE;
  45 }
  46
  47
  48 /**********************************************************************
  49  *           WIDGETS_Call32WndProc
  50  *
  51  * Call the window procedure of a built-in class.
  52  */
  53 LONG WIDGETS_Call32WndProc( FARPROC func, HWND hwnd, WORD message,
  54                             WORD wParam, LONG lParam )
  55 {
  56     unsigned int i = (unsigned int) func;
  57     if (!i || (i > NB_BUILTIN_CLASSES)) return 0;
  58     return (*WndProc32[i-1])( hwnd, message, wParam, lParam );
  59 }
  60
  61
  62 /***********************************************************************
  63  *           WIDGETS_ButtonWndProc
  64  */
  65 static LONG WIDGETS_ButtonWndProc( HWND hwnd, WORD message,
  66                                    WORD wParam, LONG lParam )
  67 {
  68     switch(message)
  69     {
  70     case WM_CREATE:
  71         return 0;
  72
  73     case WM_PAINT:
  74         {
  75             HDC hdc;
  76             PAINTSTRUCT ps;
  77             RECT rect;
  78
  79             hdc = BeginPaint( hwnd, &ps );
  80             GetClientRect( hwnd, &rect );
  81             DrawText(hdc, "Button", -1, &rect,
  82                      DT_SINGLELINE | DT_CENTER | DT_VCENTER );
  83             EndPaint( hwnd, &ps );
  84             return 0;
  85         }
  86
  87     default:
  88         return DefWindowProc( hwnd, message, wParam, lParam );
  89     }
  90 }
  91
  92
  93 /***********************************************************************
  94  *           WIDGETS_StaticWndProc
  95  */
  96 static LONG WIDGETS_StaticWndProc( HWND hwnd, WORD message,
  97                                    WORD wParam, LONG lParam )
  98 {
  99     switch(message)
 100     {
 101     case WM_CREATE:
 102         return 0;
 103
 104     case WM_PAINT:
 105         {
 106             HDC hdc;
 107             PAINTSTRUCT ps;
 108             RECT rect;
 109
 110             hdc = BeginPaint( hwnd, &ps );
 111             GetClientRect( hwnd, &rect );
 112             DrawText(hdc, "Static", -1, &rect,
 113                      DT_SINGLELINE | DT_CENTER | DT_VCENTER );
 114             EndPaint( hwnd, &ps );
 115             return 0;
 116         }
 117
 118     default:
 119         return DefWindowProc( hwnd, message, wParam, lParam );
 120     }
 121 }