TRIDEE.C

//************************************************************************ 
//** 
//**  THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF 
//**  ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED 
//**  TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR 
//**  A PARTICULAR PURPOSE. 
//** 
//**  Copyright 1993 - 1998 Microsoft Corporation. All Rights Reserved. 
//** 
//**  tridee.c 
//** 
//**  DESCRIPTION: 
//**    routines to draw 3d borders 
//** 
//************************************************************************ 
 
#include <windows.h> 
#include <windowsx.h> 
 
#include "res.h" 
#include "tridee.h" 
 
// declare variables global to this module 
// 
static COLORREF crFace; 
static COLORREF crHilite; 
static COLORREF crShadow; 
 
static HBRUSH hBrFace = NULL; 
static HBRUSH hBrShadow = NULL; 
static HBRUSH hBrHilite = NULL; 
static BOOL   bIs3D = FALSE; 
static int    cUsers = 0; 
 
/*+ TrideeCreate 
 * 
 * Register a new client for the Tridee stuff. 
 * 
 * on the first client we create the brushes that we will need. 
 * on others we just release the useage count. 
 * 
 * this routine is intended to be called in the WM_CREATE case of the 
 * client. 
 * 
 *-=================================================================*/ 
 
HBRUSH FAR PASCAL TrideeCreate(HWND hWnd) 
{ 
   hWnd; 
 
   if(!cUsers++) 
   { 
      // create the button face brush, if we fail this, 
      // set the use count back to 0 and return failure to 
      // the caller. 
      // 
      crFace = GetSysColor(COLOR_BTNFACE); 
      crShadow = GetSysColor(COLOR_BTNSHADOW); 
      crHilite = GetSysColor(COLOR_BTNHIGHLIGHT); 
 
      hBrFace = CreateSolidBrush(crFace); 
      if(!hBrFace) 
      { 
         cUsers = 0; 
         return NULL; 
      } 
 
      // if the button face color is white, assume we are 
      // on a EGA or Mono system, and dont even try to create 
      // hilite and shadow brushes. 
      bIs3D = (crFace != RGB(255,255,255)); 
      if (!bIs3D) 
         hBrShadow = hBrHilite = NULL; 
      else 
      { 
         // create brushes for the hilite and shadow 
         // 
         hBrShadow = CreateSolidBrush(crShadow); 
         hBrHilite = CreateSolidBrush(crHilite); 
      } 
   } 
 
   return hBrFace; 
} 
 
/*+ TrideeDestroy 
 * 
 * DeRegister a client for the tridee stuff. 
 * 
 * when the count of clients gets to 0, we destroy the brushes. 
 * 
 * this routine is intended to be used in the WM_DESTROY case of 
 * the client. 
 * 
 *-=================================================================*/ 
 
BOOL FAR PASCAL TrideeDestroy(HWND hWnd) 
{ 
   hWnd; 
 
   if(!--cUsers) 
   { 
      // free the GDI objects 
      if(hBrFace) 
         DeleteObject(hBrFace), hBrFace = NULL; 
      if(hBrHilite) 
         DeleteObject(hBrHilite), hBrHilite = NULL; 
      if(hBrShadow) 
         DeleteObject(hBrShadow), hBrShadow = NULL; 
   } 
   return TRUE; 
} 
 
/*+ TrideeWellShadow 
 * 
 * draw a well border just inside the supplied rectangle. 
 * (a well has a hilite on lower and right edges and shadow 
 * on upper and left) 
 * 
 * this routine does not fill the recangle, it merely paints 
 * the 'frame' 
 * 
 *-=================================================================*/ 
 
VOID FAR PASCAL TrideeWellShadow(HDC hDC, LPRECT lprc) 
{ 
   // draw the left and upper shadow 
   // 
   SelectObject(hDC, hBrShadow); 
   PatBlt(hDC, lprc->left, lprc->top, 2,  
                     lprc->bottom - lprc->top -2, PATCOPY); 
   PatBlt(hDC, lprc->left, lprc->top,  
                     lprc->right - lprc->left, 2, PATCOPY); 
 
   // now draw the bottom and right hilite 
   // 
   SelectObject(hDC, hBrHilite); 
   PatBlt(hDC, lprc->right-1, lprc->top+1, 
                1, lprc->bottom - lprc->top -2, PATCOPY); 
   PatBlt(hDC, lprc->left+1, lprc->bottom-1, 
                lprc->right -lprc->left-1, 1, PATCOPY); 
 
}