windows/sysmetrics.c

   1 /*
   2  * System metrics functions
   3  *
   4  * Copyright 1994 Alexandre Julliard
   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include <stdarg.h>
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <assert.h>
  25
  26 #include "windef.h"
  27 #include "winbase.h"
  28 #include "winreg.h"
  29 #include "wingdi.h"
  30 #include "wine/winuser16.h"
  31 #include "winuser.h"
  32 #include "winerror.h"
  33 #include "user.h"
  34
  35 static int sysMetrics[SM_CMETRICS+1];
  36 static HDC display_dc;
  37
  38
  39 /***********************************************************************
  40  * RegistryTwips2Pixels
  41  *
  42  * Convert a a dimension value that was obtained from the registry.  These are
  43  * quoted as being "twips" values if negative and pixels if positive.
  44  * See for example
  45  *   MSDN Library - April 2001 -> Resource Kits ->
  46  *       Windows 2000 Resource Kit Reference ->
  47  *       Technical Reference to the Windows 2000 Registry ->
  48  *       HKEY_CURRENT_USER -> Control Panel -> Desktop -> WindowMetrics
  49  *
  50  * This is written as a function to prevent repeated evaluation of the
  51  * argument.
  52  */
  53 inline static int RegistryTwips2Pixels(int x)
  54 {
  55     if (x < 0)
  56         x = (-x+7)/15;
  57     return x;
  58 }
  59
  60
  61 /***********************************************************************
  62  * SYSMETRICS_GetRegistryMetric
  63  *
  64  * Get a registry entry from the already open key.  This allows us to open the
  65  * section once and read several values.
  66  *
  67  * Of course this function belongs somewhere more usable but here will do
  68  * for now.
  69  */
  70 static int SYSMETRICS_GetRegistryMetric (
  71         HKEY       hkey,            /* handle to the registry section */
  72         const char *key,            /* value name in the section */
  73         int        default_value)   /* default to return */
  74 {
  75     int value = default_value;
  76     if (hkey)
  77     {
  78         BYTE buffer[128];
  79         DWORD type, count = sizeof(buffer);
  80         if(!RegQueryValueExA (hkey, key, 0, &type, buffer, &count))
  81         {
  82             if (type != REG_SZ)
  83             {
  84                 /* Are there any utilities for converting registry entries
  85                  * between formats?
  86                  */
  87                 /* FIXME_(reg)("We need reg format converter\n"); */
  88             }
  89             else
  90                 value = atoi(buffer);
  91         }
  92     }
  93     return RegistryTwips2Pixels(value);
  94 }
  95
  96
  97 /***********************************************************************
  98  *           SYSMETRICS_Init
  99  *
 100  * Initialisation of the system metrics array.
 101  *
 102  * Differences in return values between 3.1 and 95 apps under Win95 (FIXME ?):
 103  * SM_CXVSCROLL        x+1      x       Fixed May 24, 1999 - Ronald B. Cemer
 104  * SM_CYHSCROLL        x+1      x       Fixed May 24, 1999 - Ronald B. Cemer
 105  * SM_CXDLGFRAME       x-1      x       Already fixed
 106  * SM_CYDLGFRAME       x-1      x       Already fixed
 107  * SM_CYCAPTION        x+1      x       Fixed May 24, 1999 - Ronald B. Cemer
 108  * SM_CYMENU           x-1      x       Already fixed
 109  * SM_CYFULLSCREEN     x-1      x
 110  * SM_CXFRAME                           Fixed July 6, 2001 - Bill Medland
 111  *
 112  * Starting at Win95 there are now a large number or Registry entries in the
 113  * [WindowMetrics] section that are probably relevant here.
 114  */
 115 void SYSMETRICS_Init(void)
 116 {
 117     HKEY hkey; /* key to the window metrics area of the registry */
 118     INT dummy;
 119
 120     display_dc = CreateICA( "DISPLAY", NULL, NULL, NULL );
 121     assert( display_dc );
 122
 123     if (RegOpenKeyExA (HKEY_CURRENT_USER, "Control Panel\\desktop\\WindowMetrics",
 124                        0, KEY_QUERY_VALUE, &hkey) != ERROR_SUCCESS) hkey = 0;
 125
 126     sysMetrics[SM_CXVSCROLL] = SYSMETRICS_GetRegistryMetric( hkey, "ScrollWidth", 16 );
 127     sysMetrics[SM_CYHSCROLL] = sysMetrics[SM_CXVSCROLL];
 128
 129     /* The Win 2000 resource kit SAYS that this is governed by the ScrollHeight
 130      * but on my computer that controls the CYV/CXH values. */
 131     sysMetrics[SM_CYCAPTION] = SYSMETRICS_GetRegistryMetric(hkey, "CaptionHeight", 18)
 132                                  + 1; /* for the separator? */
 133
 134     sysMetrics[SM_CYMENU] = SYSMETRICS_GetRegistryMetric (hkey, "MenuHeight", 18) + 1;
 135
 136
 137     sysMetrics[SM_CXDLGFRAME] = 3;
 138     sysMetrics[SM_CYDLGFRAME] = sysMetrics[SM_CXDLGFRAME];
 139
 140     /* force setting of SM_CXFRAME/SM_CYFRAME */
 141     SystemParametersInfoA( SPI_GETBORDER, 0, &dummy, 0 );
 142
 143     sysMetrics[SM_CXCURSOR] = 32;
 144     sysMetrics[SM_CYCURSOR] = 32;
 145     sysMetrics[SM_CXBORDER] = 1;
 146     sysMetrics[SM_CYBORDER] = sysMetrics[SM_CXBORDER];
 147     sysMetrics[SM_CYVTHUMB] = sysMetrics[SM_CXVSCROLL];
 148     sysMetrics[SM_CXHTHUMB] = sysMetrics[SM_CYVTHUMB];
 149     sysMetrics[SM_CXICON] = 32;
 150     sysMetrics[SM_CYICON] = 32;
 151     sysMetrics[SM_CYKANJIWINDOW] = 0;
 152     sysMetrics[SM_MOUSEPRESENT] = 1;
 153     sysMetrics[SM_CYVSCROLL] = SYSMETRICS_GetRegistryMetric (hkey, "ScrollHeight", sysMetrics[SM_CXVSCROLL]);
 154     sysMetrics[SM_CXHSCROLL] = SYSMETRICS_GetRegistryMetric (hkey, "ScrollHeight", sysMetrics[SM_CYHSCROLL]);
 155     sysMetrics[SM_DEBUG] = 0;
 156
 157     sysMetrics[SM_SWAPBUTTON] = 0;
 158     sysMetrics[SM_SWAPBUTTON] = SYSPARAMS_GetMouseButtonSwap();
 159
 160     sysMetrics[SM_RESERVED1] = 0;
 161     sysMetrics[SM_RESERVED2] = 0;
 162     sysMetrics[SM_RESERVED3] = 0;
 163     sysMetrics[SM_RESERVED4] = 0;
 164
 165     /* FIXME: The following two are calculated, but how? */
 166     sysMetrics[SM_CXMIN] = 112;
 167     sysMetrics[SM_CYMIN] = 27;
 168
 169     sysMetrics[SM_CXSIZE] = sysMetrics[SM_CYCAPTION] - 1;
 170     sysMetrics[SM_CYSIZE] = sysMetrics[SM_CXSIZE];
 171     sysMetrics[SM_CXMINTRACK] = sysMetrics[SM_CXMIN];
 172     sysMetrics[SM_CYMINTRACK] = sysMetrics[SM_CYMIN];
 173
 174     sysMetrics[SM_CXDOUBLECLK] = 4;
 175     sysMetrics[SM_CYDOUBLECLK] = 4;
 176     SYSPARAMS_GetDoubleClickSize( &sysMetrics[SM_CXDOUBLECLK], &sysMetrics[SM_CYDOUBLECLK] );
 177
 178     sysMetrics[SM_CXICONSPACING] = 75;
 179     SystemParametersInfoA( SPI_ICONHORIZONTALSPACING, 0,
 180                            &sysMetrics[SM_CXICONSPACING], 0 );
 181     sysMetrics[SM_CYICONSPACING] = 75;
 182     SystemParametersInfoA( SPI_ICONVERTICALSPACING, 0,
 183                            &sysMetrics[SM_CYICONSPACING], 0 );
 184
 185     SystemParametersInfoA( SPI_GETMENUDROPALIGNMENT, 0,
 186                            &sysMetrics[SM_MENUDROPALIGNMENT], 0 );
 187     sysMetrics[SM_PENWINDOWS] = 0;
 188     sysMetrics[SM_DBCSENABLED] = 0;
 189
 190     /* FIXME: Need to query X for the following */
 191     sysMetrics[SM_CMOUSEBUTTONS] = 3;
 192
 193     sysMetrics[SM_SECURE] = 0;
 194     sysMetrics[SM_CXEDGE] = sysMetrics[SM_CXBORDER] + 1;
 195     sysMetrics[SM_CYEDGE] = sysMetrics[SM_CXEDGE];
 196     sysMetrics[SM_CXMINSPACING] = 160;
 197     sysMetrics[SM_CYMINSPACING] = 24;
 198     sysMetrics[SM_CXSMICON] = sysMetrics[SM_CYSIZE] - (sysMetrics[SM_CYSIZE] % 2);
 199     sysMetrics[SM_CYSMICON] = sysMetrics[SM_CXSMICON];
 200     sysMetrics[SM_CYSMCAPTION] = 16;
 201     sysMetrics[SM_CXSMSIZE] = 13;
 202     sysMetrics[SM_CYSMSIZE] = 15;
 203     sysMetrics[SM_CXMENUSIZE] = sysMetrics[SM_CYMENU] - 1;
 204     sysMetrics[SM_CYMENUSIZE] = sysMetrics[SM_CXMENUSIZE];
 205
 206     /* FIXME: What do these mean? */
 207     sysMetrics[SM_ARRANGE] = ARW_HIDE;
 208     sysMetrics[SM_CXMINIMIZED] = 160;
 209     sysMetrics[SM_CYMINIMIZED] = 24;
 210
 211     /* FIXME: How do I calculate these? */
 212     sysMetrics[SM_NETWORK] = 3;
 213
 214     /* For the following: 0 = ok, 1 = failsafe, 2 = failsafe + network */
 215     sysMetrics[SM_CLEANBOOT] = 0;
 216
 217     sysMetrics[SM_CXDRAG] = 2;
 218     sysMetrics[SM_CYDRAG] = 2;
 219     sysMetrics[SM_CXMENUCHECK] = 13;
 220     sysMetrics[SM_CYMENUCHECK] = 13;
 221
 222     /* FIXME: Should check the type of processor for the following */
 223     sysMetrics[SM_SLOWMACHINE] = 0;
 224
 225     /* FIXME: Should perform a check */
 226     sysMetrics[SM_MIDEASTENABLED] = 0;
 227
 228     sysMetrics[SM_MOUSEWHEELPRESENT] = 1;
 229
 230     sysMetrics[SM_XVIRTUALSCREEN] = 0;
 231     sysMetrics[SM_YVIRTUALSCREEN] = 0;
 232     sysMetrics[SM_CMONITORS] = 1;
 233     sysMetrics[SM_SAMEDISPLAYFORMAT] = 1;
 234     sysMetrics[SM_CMETRICS] = SM_CMETRICS;
 235
 236     SystemParametersInfoA( SPI_GETSHOWSOUNDS, 0, &sysMetrics[SM_SHOWSOUNDS], 0 );
 237
 238     if (hkey) RegCloseKey (hkey);
 239 }
 240
 241
 242 /***********************************************************************
 243  *              SYSMETRICS_Set
 244  *
 245  *  Sets system metrics.
 246  */
 247 INT SYSMETRICS_Set( INT index, INT value )
 248 {
 249     if ((index < 0) || (index > SM_CMETRICS)) return 0;
 250     else
 251     {
 252         INT prev = sysMetrics[index];
 253         sysMetrics[index] = value;
 254         return prev;
 255     }
 256 }
 257
 258
 259 /***********************************************************************
 260  *              GetSystemMetrics (USER.179)
 261  */
 262 INT16 WINAPI GetSystemMetrics16( INT16 index )
 263 {
 264     return (INT16)GetSystemMetrics(index);
 265 }
 266
 267
 268 /***********************************************************************
 269  *              GetSystemMetrics (USER32.@)
 270  */
 271 INT WINAPI GetSystemMetrics( INT index )
 272 {
 273     /* some metrics are dynamic */
 274     switch (index)
 275     {
 276     case SM_CXSCREEN:
 277     case SM_CXFULLSCREEN:
 278     case SM_CXVIRTUALSCREEN:
 279         return GetDeviceCaps( display_dc, HORZRES );
 280     case SM_CYSCREEN:
 281     case SM_CYVIRTUALSCREEN:
 282         return GetDeviceCaps( display_dc, VERTRES );
 283     case SM_CYFULLSCREEN:
 284         return GetDeviceCaps( display_dc, VERTRES ) - sysMetrics[SM_CYCAPTION];
 285
 286     /* FIXME: How do I calculate these? */
 287     case SM_CXMAXTRACK:
 288         return GetDeviceCaps( display_dc, HORZRES ) + 4 + 2 * sysMetrics[SM_CXFRAME];
 289     case SM_CYMAXTRACK:
 290         return GetDeviceCaps( display_dc, VERTRES ) + 4 + 2 * sysMetrics[SM_CYFRAME];
 291     case SM_CXMAXIMIZED:
 292         return GetDeviceCaps( display_dc, HORZRES ) + 2 * sysMetrics[SM_CXFRAME];
 293     case SM_CYMAXIMIZED:
 294         return GetDeviceCaps( display_dc, VERTRES ) + 2 * sysMetrics[SM_CYFRAME];
 295
 296     default:
 297         if ((index < 0) || (index > SM_CMETRICS)) return 0;
 298         return sysMetrics[index];
 299     }
 300 }