reactos/dll/win32/comctl32/theme_listbox.c

   1 /*
   2  * Theming - List box control
   3  *
   4  * Copyright (c) 2005 by Frank Richter
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  *
  20  */
  21
  22 #include "comctl32.h"
  23
  24 /* Draw themed border */
  25 static void nc_paint (HTHEME theme, HWND hwnd, HRGN region)
  26 {
  27     HRGN cliprgn = region;
  28     DWORD exStyle = GetWindowLongW (hwnd, GWL_EXSTYLE);
  29     if (exStyle & WS_EX_CLIENTEDGE)
  30     {
  31         HDC dc;
  32         RECT r;
  33         int cxEdge = GetSystemMetrics (SM_CXEDGE),
  34             cyEdge = GetSystemMetrics (SM_CYEDGE);
  35
  36         GetWindowRect(hwnd, &r);
  37
  38         /* New clipping region passed to default proc to exclude border */
  39         cliprgn = CreateRectRgn (r.left + cxEdge, r.top + cyEdge,
  40             r.right - cxEdge, r.bottom - cyEdge);
  41         if (region != (HRGN)1)
  42             CombineRgn (cliprgn, cliprgn, region, RGN_AND);
  43         OffsetRect(&r, -r.left, -r.top);
  44
  45         dc = GetWindowDC(hwnd);
  46         /* Exclude client part */
  47         ExcludeClipRect(dc, r.left + cxEdge, r.top + cyEdge,
  48             r.right - cxEdge, r.bottom -cyEdge);
  49
  50         if (IsThemeBackgroundPartiallyTransparent (theme, 0, 0))
  51             DrawThemeParentBackground(hwnd, dc, &r);
  52         DrawThemeBackground (theme, dc, 0, 0, &r, 0);
  53         ReleaseDC(hwnd, dc);
  54     }
  55
  56     /* Call default proc to get the scrollbars etc. painted */
  57     DefWindowProcW (hwnd, WM_NCPAINT, (WPARAM)cliprgn, 0);
  58 }
  59
  60 /**********************************************************************
  61  * The list control subclass window proc.
  62  */
  63 LRESULT CALLBACK THEMING_ListBoxSubclassProc (HWND hwnd, UINT msg,
  64                                               WPARAM wParam, LPARAM lParam,
  65                                               ULONG_PTR dwRefData)
  66 {
  67     const WCHAR* themeClass = WC_LISTBOXW;
  68     HTHEME theme;
  69     LRESULT result;
  70
  71     switch (msg)
  72     {
  73     case WM_CREATE:
  74         result = THEMING_CallOriginalClass  (hwnd, msg, wParam, lParam);
  75         OpenThemeData( hwnd, themeClass );
  76         return result;
  77
  78     case WM_DESTROY:
  79         theme = GetWindowTheme( hwnd );
  80         CloseThemeData ( theme );
  81         return THEMING_CallOriginalClass (hwnd, msg, wParam, lParam);
  82
  83     case WM_THEMECHANGED:
  84         theme = GetWindowTheme( hwnd );
  85         CloseThemeData ( theme );
  86         OpenThemeData( hwnd, themeClass );
  87         break;
  88
  89     case WM_SYSCOLORCHANGE:
  90         theme = GetWindowTheme( hwnd );
  91         if (!theme) return THEMING_CallOriginalClass (hwnd, msg, wParam, lParam);
  92         /* Do nothing. When themed, a WM_THEMECHANGED will be received, too,
  93          * which will do the repaint. */
  94         break;
  95
  96     case WM_NCPAINT:
  97         theme = GetWindowTheme( hwnd );
  98         if (!theme) return THEMING_CallOriginalClass (hwnd, msg, wParam, lParam);
  99         nc_paint (theme, hwnd, (HRGN)wParam);
 100         break;
 101
 102     default:
 103         /* Call old proc */
 104         return THEMING_CallOriginalClass (hwnd, msg, wParam, lParam);
 105     }
 106     return 0;
 107 }