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 <stdarg.h>
  22 #include <stdio.h>
  23 #include <string.h>
  24
  25 #include "windef.h"
  26 #include "winbase.h"
  27 #include "wingdi.h"
  28 #include "winuser.h"
  29 #include "controls.h"
  30 #include "win.h"
  31
  32 static BOOL bMultiLineTitle;
  33 static HFONT hIconTitleFont;
  34
  35 /*********************************************************************
  36  * icon title class descriptor
  37  */
  38 const struct builtin_class_descr ICONTITLE_builtin_class =
  39 {
  40     (LPCWSTR)ICONTITLE_CLASS_ATOM, /* name */
  41     0,                    /* style */
  42     WINPROC_ICONTITLE,    /* proc */
  43     0,                    /* extra */
  44     IDC_ARROW,            /* cursor */
  45     0                     /* brush */
  46 };
  47
  48 /***********************************************************************
  49  *           ICONTITLE_SetTitlePos
  50  */
  51 static BOOL ICONTITLE_SetTitlePos( HWND hwnd, HWND owner )
  52 {
  53     WCHAR str[80];
  54     HDC hDC;
  55     HFONT hPrevFont;
  56     RECT rect;
  57     INT cx, cy;
  58     POINT pt;
  59
  60     int length = GetWindowTextW( owner, str, ARRAY_SIZE( str ));
  61
  62     while (length && str[length - 1] == ' ') /* remove trailing spaces */
  63         str[--length] = 0;
  64
  65     if( !length )
  66     {
  67         lstrcpyW( str, L"<...>" );
  68         length = lstrlenW( str );
  69     }
  70
  71     if (!(hDC = GetDC( hwnd ))) return FALSE;
  72
  73     hPrevFont = SelectObject( hDC, hIconTitleFont );
  74
  75     SetRect( &rect, 0, 0, GetSystemMetrics(SM_CXICONSPACING) -
  76              GetSystemMetrics(SM_CXBORDER) * 2,
  77              GetSystemMetrics(SM_CYBORDER) * 2 );
  78
  79     DrawTextW( hDC, str, length, &rect, DT_CALCRECT | DT_CENTER | DT_NOPREFIX | DT_WORDBREAK |
  80                (( bMultiLineTitle ) ? 0 : DT_SINGLELINE) );
  81
  82     SelectObject( hDC, hPrevFont );
  83     ReleaseDC( hwnd, hDC );
  84
  85     cx = rect.right - rect.left +  4 * GetSystemMetrics(SM_CXBORDER);
  86     cy = rect.bottom - rect.top;
  87
  88     pt.x = (GetSystemMetrics(SM_CXICON) - cx) / 2;
  89     pt.y = GetSystemMetrics(SM_CYICON);
  90
  91     /* point is relative to owner, make it relative to parent */
  92     MapWindowPoints( owner, GetParent(hwnd), &pt, 1 );
  93
  94     SetWindowPos( hwnd, owner, pt.x, pt.y, cx, cy, SWP_NOACTIVATE );
  95     return TRUE;
  96 }
  97
  98 /***********************************************************************
  99  *           ICONTITLE_Paint
 100  */
 101 static BOOL ICONTITLE_Paint( HWND hwnd, HWND owner, HDC hDC, BOOL bActive )
 102 {
 103     RECT rect;
 104     HFONT hPrevFont;
 105     HBRUSH hBrush;
 106     COLORREF textColor = 0;
 107
 108     if( bActive )
 109     {
 110         hBrush = GetSysColorBrush(COLOR_ACTIVECAPTION);
 111         textColor = GetSysColor(COLOR_CAPTIONTEXT);
 112     }
 113     else
 114     {
 115         if( GetWindowLongA( hwnd, GWL_STYLE ) & WS_CHILD )
 116         {
 117             hBrush = (HBRUSH) GetClassLongPtrW(hwnd, GCLP_HBRBACKGROUND);
 118             if( hBrush )
 119             {
 120                 INT level;
 121                 LOGBRUSH logBrush;
 122                 GetObjectA( hBrush, sizeof(logBrush), &logBrush );
 123                 level = GetRValue(logBrush.lbColor) +
 124                            GetGValue(logBrush.lbColor) +
 125                               GetBValue(logBrush.lbColor);
 126                 if( level < (0x7F * 3) )
 127                     textColor = RGB( 0xFF, 0xFF, 0xFF );
 128             }
 129             else
 130                 hBrush = GetStockObject( WHITE_BRUSH );
 131         }
 132         else
 133         {
 134             hBrush = GetStockObject( BLACK_BRUSH );
 135             textColor = RGB( 0xFF, 0xFF, 0xFF );
 136         }
 137     }
 138
 139     GetClientRect( hwnd, &rect );
 140     DPtoLP( hDC, (LPPOINT)&rect, 2 );
 141     FillRect( hDC, &rect, hBrush );
 142
 143     hPrevFont = SelectObject( hDC, hIconTitleFont );
 144     if( hPrevFont )
 145     {
 146         WCHAR buffer[80];
 147
 148         INT length = GetWindowTextW( owner, buffer, ARRAY_SIZE( buffer ));
 149         SetTextColor( hDC, textColor );
 150         SetBkMode( hDC, TRANSPARENT );
 151
 152         DrawTextW( hDC, buffer, length, &rect, DT_CENTER | DT_NOPREFIX |
 153                    DT_WORDBREAK | ((bMultiLineTitle) ? 0 : DT_SINGLELINE) );
 154
 155         SelectObject( hDC, hPrevFont );
 156     }
 157     return (hPrevFont != 0);
 158 }
 159
 160 /***********************************************************************
 161  *           IconTitleWndProc
 162  */
 163 LRESULT WINAPI IconTitleWndProc( HWND hWnd, UINT msg,
 164                                  WPARAM wParam, LPARAM lParam )
 165 {
 166     HWND owner = GetWindow( hWnd, GW_OWNER );
 167
 168     if (!IsWindow(hWnd)) return 0;
 169
 170     switch( msg )
 171     {
 172         case WM_CREATE:
 173             if (!hIconTitleFont)
 174             {
 175                 LOGFONTA logFont;
 176                 SystemParametersInfoA( SPI_GETICONTITLELOGFONT, 0, &logFont, 0 );
 177                 SystemParametersInfoA( SPI_GETICONTITLEWRAP, 0, &bMultiLineTitle, 0 );
 178                 hIconTitleFont = CreateFontIndirectA( &logFont );
 179             }
 180             return (hIconTitleFont ? 0 : -1);
 181         case WM_NCHITTEST:
 182              return HTCAPTION;
 183         case WM_NCMOUSEMOVE:
 184         case WM_NCLBUTTONDBLCLK:
 185              return SendMessageW( owner, msg, wParam, lParam );
 186         case WM_ACTIVATE:
 187              if( wParam ) SetActiveWindow( owner );
 188              return 0;
 189         case WM_CLOSE:
 190              return 0;
 191         case WM_SHOWWINDOW:
 192              if (wParam) ICONTITLE_SetTitlePos( hWnd, owner );
 193              return 0;
 194         case WM_ERASEBKGND:
 195             if( GetWindowLongW( owner, GWL_STYLE ) & WS_CHILD )
 196                 lParam = SendMessageW( owner, WM_ISACTIVEICON, 0, 0 );
 197             else
 198                 lParam = (owner == GetActiveWindow());
 199             if( ICONTITLE_Paint( hWnd, owner, (HDC)wParam, (BOOL)lParam ) )
 200                 ValidateRect( hWnd, NULL );
 201             return 1;
 202     }
 203     return DefWindowProcW( hWnd, msg, wParam, lParam );
 204 }