dlls/uxtheme/dialog.c

   1 /*
   2  * Dialog theming support
   3  *
   4  * Copyright 2022 Zhiyi Zhang for CodeWeavers
   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 #include <stdarg.h>
  22
  23 #include "windef.h"
  24 #include "winbase.h"
  25 #include "wingdi.h"
  26 #include "winuser.h"
  27 #include "uxtheme.h"
  28 #include "uxthemedll.h"
  29 #include "vssym32.h"
  30
  31 extern ATOM atDialogThemeEnabled;
  32 static const WCHAR wine_dialog_brush[] = L"wine_dialog_brush";
  33
  34 static HBRUSH get_dialog_background_brush(HWND hwnd, BOOL create)
  35 {
  36     HBITMAP bitmap, old_bitmap;
  37     HDC hdc, hdc_screen;
  38     HBRUSH brush;
  39     HTHEME theme;
  40     DWORD flag;
  41     HRESULT hr;
  42     RECT rect;
  43     SIZE size;
  44
  45     if (!IsThemeActive())
  46         return NULL;
  47
  48     flag = HandleToUlong(GetPropW(hwnd, (LPCWSTR)MAKEINTATOM(atDialogThemeEnabled)));
  49     if (flag != ETDT_ENABLETAB && flag != ETDT_ENABLEAEROWIZARDTAB)
  50         return NULL;
  51
  52     brush = GetPropW(hwnd, wine_dialog_brush);
  53     if (brush)
  54         return brush;
  55
  56     if (!create)
  57         return NULL;
  58
  59     theme = OpenThemeData(NULL, L"Tab");
  60     if (!theme)
  61         return NULL;
  62
  63     hr = GetThemePartSize(theme, NULL, TABP_BODY, 0, NULL, TS_TRUE, &size);
  64     if (FAILED(hr))
  65     {
  66         size.cx = 10;
  67         size.cy = 600;
  68     }
  69
  70     hdc_screen = GetDC(NULL);
  71     hdc = CreateCompatibleDC(hdc_screen);
  72     bitmap = CreateCompatibleBitmap(hdc_screen, size.cx, size.cy);
  73     old_bitmap = SelectObject(hdc, bitmap);
  74
  75     SetRect(&rect, 0, 0, size.cx, size.cy);
  76     /* FIXME: XP draws the tab body bitmap directly without transparency even if there is */
  77     FillRect(hdc, &rect, GetSysColorBrush(COLOR_3DFACE));
  78     hr = DrawThemeBackground(theme, hdc, TABP_BODY, 0, &rect, NULL);
  79     if (SUCCEEDED(hr))
  80     {
  81         brush = CreatePatternBrush(bitmap);
  82         SetPropW(hwnd, wine_dialog_brush, brush);
  83     }
  84
  85     SelectObject(hdc, old_bitmap);
  86     DeleteDC(hdc);
  87     ReleaseDC(NULL, hdc_screen);
  88     CloseThemeData(theme);
  89     return brush;
  90 }
  91
  92 static void destroy_dialog_brush(HWND hwnd)
  93 {
  94     LOGBRUSH logbrush;
  95     HBRUSH brush;
  96
  97     brush = GetPropW(hwnd, wine_dialog_brush);
  98     if (brush)
  99     {
 100         RemovePropW(hwnd, wine_dialog_brush);
 101         if (GetObjectW(brush, sizeof(logbrush), &logbrush) == sizeof(logbrush))
 102             DeleteObject((HBITMAP)logbrush.lbHatch);
 103         DeleteObject(brush);
 104     }
 105 }
 106
 107 LRESULT WINAPI UXTHEME_DefDlgProc(HWND hwnd, UINT msg, WPARAM wp, LPARAM lp, BOOL unicode)
 108 {
 109     POINT org, old_org;
 110     WNDPROC dlgproc;
 111     HBRUSH brush;
 112     LRESULT lr;
 113     RECT rect;
 114     HDC hdc;
 115
 116     switch (msg)
 117     {
 118     case WM_NCDESTROY:
 119     {
 120         destroy_dialog_brush(hwnd);
 121         break;
 122     }
 123     case WM_THEMECHANGED:
 124     {
 125         destroy_dialog_brush(hwnd);
 126         InvalidateRect(hwnd, NULL, TRUE);
 127         break;
 128     }
 129     case WM_ERASEBKGND:
 130     {
 131         dlgproc = (WNDPROC)GetWindowLongPtrW(hwnd, DWLP_DLGPROC);
 132         SetWindowLongPtrW(hwnd, DWLP_MSGRESULT, 0);
 133         lr = LOWORD(CallWindowProcW(dlgproc, hwnd, msg, wp, lp));
 134         if (lr)
 135             return GetWindowLongPtrW(hwnd, DWLP_MSGRESULT);
 136
 137         brush = get_dialog_background_brush(hwnd, TRUE);
 138         if (!brush)
 139             break;
 140
 141         /* Using FillRect() to draw background could introduce a tiling effect if the destination
 142          * rectangle is larger than the pattern brush size, which is usually 10x600. This bug is
 143          * visible on property sheet pages if system DPI is set to 192. However, the same bug also
 144          * exists on XP and explains why vista+ don't use gradient tab body background anymore */
 145         hdc = (HDC)wp;
 146         GetViewportOrgEx(hdc, &org);
 147         SetBrushOrgEx(hdc, org.x, org.y, &old_org);
 148         GetClientRect(hwnd, &rect);
 149         FillRect(hdc, &rect, brush);
 150         SetBrushOrgEx(hdc, old_org.x, old_org.y, NULL);
 151         return TRUE;
 152     }
 153     case WM_CTLCOLORMSGBOX:
 154     case WM_CTLCOLORBTN:
 155     case WM_CTLCOLORDLG:
 156     case WM_CTLCOLORSTATIC:
 157     {
 158         dlgproc = (WNDPROC)GetWindowLongPtrW(hwnd, DWLP_DLGPROC);
 159         lr = CallWindowProcW(dlgproc, hwnd, msg, wp, lp);
 160         if (lr)
 161             return lr;
 162
 163         brush = get_dialog_background_brush(hwnd, FALSE);
 164         if (!brush)
 165             break;
 166
 167         hdc = (HDC)wp;
 168         SetBkColor(hdc, GetSysColor(COLOR_BTNFACE));
 169         SetBkMode(hdc, TRANSPARENT);
 170
 171         org.x = 0;
 172         org.y = 0;
 173         MapWindowPoints((HWND)lp, hwnd, &org, 1);
 174         SetBrushOrgEx(hdc, -org.x, -org.y, NULL);
 175         return (LRESULT)brush;
 176     }
 177     }
 178
 179     return user_api.pDefDlgProc(hwnd, msg, wp, lp, unicode);
 180 }