dlls/user32/icontitle.c

   1 /*
   2  * Icontitle window class.
   3  *
   4  * Copyright 1997 Alex Korobka
   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 "user_private.h"
  22 #include "controls.h"
  23
  24 static BOOL bMultiLineTitle;
  25 static HFONT hIconTitleFont;
  26
  27 /***********************************************************************
  28  *           ICONTITLE_SetTitlePos
  29  */
  30 static BOOL ICONTITLE_SetTitlePos( HWND hwnd, HWND owner )
  31 {
  32     WCHAR str[80];
  33     HDC hDC;
  34     HFONT hPrevFont;
  35     RECT rect;
  36     INT cx, cy;
  37     POINT pt;
  38
  39     int length = GetWindowTextW( owner, str, ARRAY_SIZE( str ));
  40
  41     while (length && str[length - 1] == ' ') /* remove trailing spaces */
  42         str[--length] = 0;
  43
  44     if( !length )
  45     {
  46         lstrcpyW( str, L"<...>" );
  47         length = lstrlenW( str );
  48     }
  49
  50     if (!(hDC = NtUserGetDC( hwnd ))) return FALSE;
  51
  52     hPrevFont = SelectObject( hDC, hIconTitleFont );
  53
  54     SetRect( &rect, 0, 0, GetSystemMetrics(SM_CXICONSPACING) -
  55              GetSystemMetrics(SM_CXBORDER) * 2,
  56              GetSystemMetrics(SM_CYBORDER) * 2 );
  57
  58     DrawTextW( hDC, str, length, &rect, DT_CALCRECT | DT_CENTER | DT_NOPREFIX | DT_WORDBREAK |
  59                (( bMultiLineTitle ) ? 0 : DT_SINGLELINE) );
  60
  61     SelectObject( hDC, hPrevFont );
  62     NtUserReleaseDC( hwnd, hDC );
  63
  64     cx = rect.right - rect.left +  4 * GetSystemMetrics(SM_CXBORDER);
  65     cy = rect.bottom - rect.top;
  66
  67     pt.x = (GetSystemMetrics(SM_CXICON) - cx) / 2;
  68     pt.y = GetSystemMetrics(SM_CYICON);
  69
  70     /* point is relative to owner, make it relative to parent */
  71     MapWindowPoints( owner, GetParent(hwnd), &pt, 1 );
  72
  73     NtUserSetWindowPos( hwnd, owner, pt.x, pt.y, cx, cy, SWP_NOACTIVATE );
  74     return TRUE;
  75 }
  76
  77 /***********************************************************************
  78  *           ICONTITLE_Paint
  79  */
  80 static BOOL ICONTITLE_Paint( HWND hwnd, HWND owner, HDC hDC, BOOL bActive )
  81 {
  82     RECT rect;
  83     HFONT hPrevFont;
  84     HBRUSH hBrush;
  85     COLORREF textColor = 0;
  86
  87     if( bActive )
  88     {
  89         hBrush = GetSysColorBrush(COLOR_ACTIVECAPTION);
  90         textColor = GetSysColor(COLOR_CAPTIONTEXT);
  91     }
  92     else
  93     {
  94         if( GetWindowLongA( hwnd, GWL_STYLE ) & WS_CHILD )
  95         {
  96             hBrush = (HBRUSH) GetClassLongPtrW(hwnd, GCLP_HBRBACKGROUND);
  97             if( hBrush )
  98             {
  99                 INT level;
 100                 LOGBRUSH logBrush;
 101                 GetObjectA( hBrush, sizeof(logBrush), &logBrush );
 102                 level = GetRValue(logBrush.lbColor) +
 103                            GetGValue(logBrush.lbColor) +
 104                               GetBValue(logBrush.lbColor);
 105                 if( level < (0x7F * 3) )
 106                     textColor = RGB( 0xFF, 0xFF, 0xFF );
 107             }
 108             else
 109                 hBrush = GetStockObject( WHITE_BRUSH );
 110         }
 111         else
 112         {
 113             hBrush = GetStockObject( BLACK_BRUSH );
 114             textColor = RGB( 0xFF, 0xFF, 0xFF );
 115         }
 116     }
 117
 118     GetClientRect( hwnd, &rect );
 119     DPtoLP( hDC, (LPPOINT)&rect, 2 );
 120     FillRect( hDC, &rect, hBrush );
 121
 122     hPrevFont = SelectObject( hDC, hIconTitleFont );
 123     if( hPrevFont )
 124     {
 125         WCHAR buffer[80];
 126
 127         INT length = GetWindowTextW( owner, buffer, ARRAY_SIZE( buffer ));
 128         SetTextColor( hDC, textColor );
 129         SetBkMode( hDC, TRANSPARENT );
 130
 131         DrawTextW( hDC, buffer, length, &rect, DT_CENTER | DT_NOPREFIX |
 132                    DT_WORDBREAK | ((bMultiLineTitle) ? 0 : DT_SINGLELINE) );
 133
 134         SelectObject( hDC, hPrevFont );
 135     }
 136     return (hPrevFont != 0);
 137 }
 138
 139 /***********************************************************************
 140  *           IconTitleWndProc
 141  */
 142 LRESULT WINAPI IconTitleWndProc( HWND hWnd, UINT msg,
 143                                  WPARAM wParam, LPARAM lParam )
 144 {
 145     HWND owner = GetWindow( hWnd, GW_OWNER );
 146
 147     if (!IsWindow(hWnd)) return 0;
 148
 149     switch( msg )
 150     {
 151         case WM_CREATE:
 152             if (!hIconTitleFont)
 153             {
 154                 LOGFONTA logFont;
 155                 SystemParametersInfoA( SPI_GETICONTITLELOGFONT, 0, &logFont, 0 );
 156                 SystemParametersInfoA( SPI_GETICONTITLEWRAP, 0, &bMultiLineTitle, 0 );
 157                 hIconTitleFont = CreateFontIndirectA( &logFont );
 158             }
 159             return (hIconTitleFont ? 0 : -1);
 160         case WM_NCHITTEST:
 161              return HTCAPTION;
 162         case WM_NCMOUSEMOVE:
 163         case WM_NCLBUTTONDBLCLK:
 164              return SendMessageW( owner, msg, wParam, lParam );
 165         case WM_ACTIVATE:
 166              if (wParam) NtUserSetActiveWindow( owner );
 167              return 0;
 168         case WM_CLOSE:
 169              return 0;
 170         case WM_SHOWWINDOW:
 171              if (wParam) ICONTITLE_SetTitlePos( hWnd, owner );
 172              return 0;
 173         case WM_ERASEBKGND:
 174             if( GetWindowLongW( owner, GWL_STYLE ) & WS_CHILD )
 175                 lParam = SendMessageW( owner, WM_ISACTIVEICON, 0, 0 );
 176             else
 177                 lParam = (owner == GetActiveWindow());
 178             if( ICONTITLE_Paint( hWnd, owner, (HDC)wParam, (BOOL)lParam ) )
 179                 NtUserValidateRect( hWnd, NULL );
 180             return 1;
 181     }
 182     return DefWindowProcW( hWnd, msg, wParam, lParam );
 183 }