windows/painting.c

   1 /*
   2  * Window painting functions
   3  *
   4  * Copyright 1993 Alexandre Julliard
   5  */
   6
   7 static char Copyright[] = "Copyright  Alexandre Julliard, 1993";
   8
   9 #include <math.h>
  10 #include <X11/Xlib.h>
  11
  12 #include "win.h"
  13 #include "message.h"
  14
  15   /* Last CTLCOLOR id */
  16 #define CTLCOLOR_MAX   CTLCOLOR_STATIC
  17
  18
  19 /***********************************************************************
  20  *           BeginPaint    (USER.39)
  21  */
  22 HDC BeginPaint( HWND hwnd, LPPAINTSTRUCT lps )
  23 {
  24     HRGN hrgnUpdate;
  25     WND * wndPtr = WIN_FindWndPtr( hwnd );
  26     if (!wndPtr) return 0;
  27
  28     hrgnUpdate = wndPtr->hrgnUpdate;  /* Save update region */
  29
  30     if (!(lps->hdc = GetDCEx( hwnd, wndPtr->hrgnUpdate,
  31                               DCX_INTERSECTRGN | DCX_USESTYLE ))) return 0;
  32     GetRgnBox( InquireVisRgn(lps->hdc), &lps->rcPaint );
  33
  34     if (wndPtr->hrgnUpdate)
  35     {
  36         wndPtr->hrgnUpdate = 0;
  37         MSG_DecPaintCount( wndPtr->hmemTaskQ );
  38     }
  39     wndPtr->flags &= ~WIN_NEEDS_BEGINPAINT;
  40
  41     SendMessage( hwnd, WM_NCPAINT, hrgnUpdate, 0 );
  42     if (hrgnUpdate) DeleteObject( hrgnUpdate );
  43
  44     if (!(wndPtr->flags & WIN_ERASE_UPDATERGN)) lps->fErase = TRUE;
  45     else lps->fErase = !SendMessage( hwnd, WM_ERASEBKGND, lps->hdc, 0 );
  46
  47     return lps->hdc;
  48 }
  49
  50
  51 /***********************************************************************
  52  *           EndPaint    (USER.40)
  53  */
  54 void EndPaint( HWND hwnd, LPPAINTSTRUCT lps )
  55 {
  56     ReleaseDC( hwnd, lps->hdc );
  57 }
  58
  59
  60 /***********************************************************************
  61  *           FillWindow    (USER.324)
  62  */
  63 void FillWindow( HWND hwndParent, HWND hwnd, HDC hdc, HBRUSH hbrush )
  64 {
  65     RECT rect;
  66     GetClientRect( hwnd, &rect );
  67     PaintRect( hwndParent, hwnd, hdc, hbrush, &rect );
  68 }
  69
  70
  71 /***********************************************************************
  72  *           PaintRect    (USER.325)
  73  */
  74 void PaintRect(HWND hwndParent, HWND hwnd, HDC hdc, HBRUSH hbrush, LPRECT rect)
  75 {
  76       /* Send WM_CTLCOLOR message if needed */
  77
  78     if (hbrush <= CTLCOLOR_MAX)
  79     {
  80         if (!hwndParent) return;
  81         hbrush = (HBRUSH)SendMessage( hwndParent, WM_CTLCOLOR,
  82                                       hdc, hwnd | (hbrush << 16) );
  83     }
  84     if (hbrush) FillRect( hdc, rect, hbrush );
  85 }