src/gtk/settings.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        gtk/settings.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10
  11 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  12 #pragma implementation "settings.h"
  13 #endif
  14
  15 // For compilers that support precompilation, includes "wx.h".
  16 #include "wx/wxprec.h"
  17
  18 #include "wx/settings.h"
  19 #include "wx/debug.h"
  20 #include "wx/cmndata.h"
  21 #include "wx/fontutil.h"
  22
  23 #include <gdk/gdk.h>
  24 #include <gdk/gdkprivate.h>
  25 #include <gtk/gtk.h>
  26
  27 #define SHIFT (8*(sizeof(short int)-sizeof(char)))
  28
  29 // ----------------------------------------------------------------------------
  30 // wxSystemObjects
  31 // ----------------------------------------------------------------------------
  32
  33 struct wxSystemObjects
  34 {
  35     wxColour m_colBtnFace,
  36              m_colBtnShadow,
  37              m_colBtnHighlight,
  38              m_colHighlight,
  39              m_colHighlightText,
  40              m_colListBox,
  41              m_colBtnText,
  42              m_colMenuItemHighlight;
  43
  44     wxFont m_fontSystem;
  45 };
  46
  47 static wxSystemObjects gs_objects;
  48
  49 // ----------------------------------------------------------------------------
  50 // wxSystemSettings implementation
  51 // ----------------------------------------------------------------------------
  52
  53 // kind of widget to use in GetColourFromGTKWidget
  54 enum wxGtkWidgetType
  55 {
  56     wxGTK_BUTTON,
  57     wxGTK_LIST,
  58     wxGTK_MENUITEM
  59 };
  60
  61 // the colour we need
  62 enum wxGtkColourType
  63 {
  64     wxGTK_FG,
  65     wxGTK_BG,
  66     wxGTK_BASE
  67 };
  68
  69 // wxSystemSettings::GetColour() helper: get the colours from a GTK+
  70 // widget style, return true if we did get them, false to use defaults
  71 static bool GetColourFromGTKWidget(int& red, int& green, int& blue,
  72                                    wxGtkWidgetType type = wxGTK_BUTTON,
  73                                    GtkStateType state = GTK_STATE_NORMAL,
  74                                    wxGtkColourType colour = wxGTK_BG)
  75 {
  76     GtkWidget *widget;
  77     switch ( type )
  78     {
  79         default:
  80             wxFAIL_MSG( _T("unexpected GTK widget type") );
  81             // fall through
  82
  83         case wxGTK_BUTTON:
  84             widget = gtk_button_new();
  85             break;
  86
  87         case wxGTK_LIST:
  88             widget = gtk_list_new();
  89
  90         case wxGTK_MENUITEM:
  91             widget = gtk_menu_item_new();
  92     }
  93
  94     GtkStyle *def = gtk_rc_get_style( widget );
  95     if ( !def )
  96         def = gtk_widget_get_default_style();
  97
  98     bool ok;
  99     if ( def )
 100     {
 101         GdkColor *col;
 102         switch ( colour )
 103         {
 104             default:
 105                 wxFAIL_MSG( _T("unexpected GTK colour type") );
 106                 // fall through
 107
 108             case wxGTK_FG:
 109                 col = def->fg;
 110                 break;
 111
 112             case wxGTK_BG:
 113                 col = def->bg;
 114                 break;
 115
 116             case wxGTK_BASE:
 117                 col = def->base;
 118                 break;
 119         }
 120
 121         red = col[state].red;
 122         green = col[state].green;
 123         blue = col[state].blue;
 124
 125         ok = TRUE;
 126     }
 127     else
 128     {
 129         ok = FALSE;
 130     }
 131
 132     gtk_widget_destroy( widget );
 133
 134     return ok;
 135 }
 136
 137 wxColour wxSystemSettingsNative::GetColour( wxSystemColour index )
 138 {
 139     switch (index)
 140     {
 141         case wxSYS_COLOUR_SCROLLBAR:
 142         case wxSYS_COLOUR_BACKGROUND:
 143         case wxSYS_COLOUR_INACTIVECAPTION:
 144         case wxSYS_COLOUR_MENU:
 145         case wxSYS_COLOUR_WINDOWFRAME:
 146         case wxSYS_COLOUR_ACTIVEBORDER:
 147         case wxSYS_COLOUR_INACTIVEBORDER:
 148         case wxSYS_COLOUR_BTNFACE:
 149         case wxSYS_COLOUR_MENUBAR:
 150         case wxSYS_COLOUR_3DLIGHT:
 151             if (!gs_objects.m_colBtnFace.Ok())
 152             {
 153                 int red, green, blue;
 154                 if ( !GetColourFromGTKWidget(red, green, blue) )
 155                 {
 156                     red =
 157                     green = 0;
 158                     blue = 0x9c40;
 159                 }
 160
 161                 gs_objects.m_colBtnFace = wxColour( red   >> SHIFT,
 162                                                    green >> SHIFT,
 163                                                    blue  >> SHIFT );
 164             }
 165             return gs_objects.m_colBtnFace;
 166
 167         case wxSYS_COLOUR_WINDOW:
 168             return *wxWHITE;
 169
 170         case wxSYS_COLOUR_3DDKSHADOW:
 171             return *wxBLACK;
 172
 173         case wxSYS_COLOUR_GRAYTEXT:
 174         case wxSYS_COLOUR_BTNSHADOW:
 175         //case wxSYS_COLOUR_3DSHADOW:
 176             if (!gs_objects.m_colBtnShadow.Ok())
 177             {
 178                 wxColour faceColour(GetColour(wxSYS_COLOUR_3DFACE));
 179                 gs_objects.m_colBtnShadow =
 180                    wxColour((unsigned char) (faceColour.Red() * 0.666),
 181                             (unsigned char) (faceColour.Green() * 0.666),
 182                             (unsigned char) (faceColour.Blue() * 0.666));
 183             }
 184
 185             return gs_objects.m_colBtnShadow;
 186
 187         case wxSYS_COLOUR_3DHIGHLIGHT:
 188         //case wxSYS_COLOUR_BTNHIGHLIGHT:
 189             return * wxWHITE;
 190
 191         case wxSYS_COLOUR_HIGHLIGHT:
 192             if (!gs_objects.m_colHighlight.Ok())
 193             {
 194                 int red, green, blue;
 195                 if ( !GetColourFromGTKWidget(red, green, blue,
 196                                              wxGTK_BUTTON,
 197                                              GTK_STATE_SELECTED) )
 198                 {
 199                     red =
 200                     green = 0;
 201                     blue = 0x9c40;
 202                 }
 203
 204                 gs_objects.m_colHighlight = wxColour( red   >> SHIFT,
 205                                                         green >> SHIFT,
 206                                                         blue  >> SHIFT );
 207             }
 208             return gs_objects.m_colHighlight;
 209
 210         case wxSYS_COLOUR_LISTBOX:
 211             if (!gs_objects.m_colListBox.Ok())
 212             {
 213                 int red, green, blue;
 214                 if ( GetColourFromGTKWidget(red, green, blue,
 215                                             wxGTK_LIST,
 216                                             GTK_STATE_NORMAL,
 217                                             wxGTK_BASE) )
 218                 {
 219                     gs_objects.m_colListBox = wxColour( red   >> SHIFT,
 220                                                           green >> SHIFT,
 221                                                           blue  >> SHIFT );
 222                 }
 223                 else
 224                 {
 225                     gs_objects.m_colListBox = wxColour(*wxWHITE);
 226                 }
 227             }
 228             return gs_objects.m_colListBox;
 229
 230         case wxSYS_COLOUR_MENUTEXT:
 231         case wxSYS_COLOUR_WINDOWTEXT:
 232         case wxSYS_COLOUR_CAPTIONTEXT:
 233         case wxSYS_COLOUR_INACTIVECAPTIONTEXT:
 234         case wxSYS_COLOUR_BTNTEXT:
 235         case wxSYS_COLOUR_INFOTEXT:
 236             if (!gs_objects.m_colBtnText.Ok())
 237             {
 238                 int red, green, blue;
 239                 if ( !GetColourFromGTKWidget(red, green, blue,
 240                                              wxGTK_BUTTON,
 241                                              GTK_STATE_NORMAL,
 242                                              wxGTK_FG) )
 243                 {
 244                     red =
 245                     green =
 246                     blue = 0;
 247                 }
 248
 249                 gs_objects.m_colBtnText = wxColour( red   >> SHIFT,
 250                                                       green >> SHIFT,
 251                                                       blue  >> SHIFT );
 252             }
 253             return gs_objects.m_colBtnText;
 254
 255             // this (as well as wxSYS_COLOUR_INFOTEXT above) is used for
 256             // tooltip windows - Robert, please change this code to use the
 257             // real GTK tooltips when/if you can (TODO)
 258         case wxSYS_COLOUR_INFOBK:
 259             return wxColour(255, 255, 225);
 260
 261         case wxSYS_COLOUR_HIGHLIGHTTEXT:
 262             if (!gs_objects.m_colHighlightText.Ok())
 263             {
 264                 wxColour hclr = GetColour(wxSYS_COLOUR_HIGHLIGHT);
 265                 if (hclr.Red() > 200 && hclr.Green() > 200 && hclr.Blue() > 200)
 266                     gs_objects.m_colHighlightText = wxColour(*wxBLACK);
 267                 else
 268                     gs_objects.m_colHighlightText = wxColour(*wxWHITE);
 269             }
 270             return gs_objects.m_colHighlightText;
 271
 272         case wxSYS_COLOUR_APPWORKSPACE:
 273             return *wxWHITE;    // ?
 274
 275         case wxSYS_COLOUR_ACTIVECAPTION:
 276         case wxSYS_COLOUR_MENUHILIGHT:
 277             if (!gs_objects.m_colMenuItemHighlight.Ok())
 278             {
 279                 int red, green, blue;
 280                 if ( !GetColourFromGTKWidget(red, green, blue,
 281                                              wxGTK_MENUITEM,
 282                                              GTK_STATE_SELECTED,
 283                                              wxGTK_BG) )
 284                 {
 285                     red =
 286                     green =
 287                     blue = 0;
 288                 }
 289
 290                 gs_objects.m_colMenuItemHighlight = wxColour( red  >> SHIFT,
 291                                                               green >> SHIFT,
 292                                                               blue  >> SHIFT );
 293             }
 294             return gs_objects.m_colMenuItemHighlight;
 295
 296         case wxSYS_COLOUR_HOTLIGHT:
 297         case wxSYS_COLOUR_GRADIENTACTIVECAPTION:
 298         case wxSYS_COLOUR_GRADIENTINACTIVECAPTION:
 299             // TODO
 300             return *wxBLACK;
 301
 302         case wxSYS_COLOUR_MAX:
 303         default:
 304             wxFAIL_MSG( _T("unknown system colour index") );
 305   }
 306
 307   return *wxWHITE;
 308 }
 309
 310 wxFont wxSystemSettingsNative::GetFont( wxSystemFont index )
 311 {
 312     switch (index)
 313     {
 314         case wxSYS_OEM_FIXED_FONT:
 315         case wxSYS_ANSI_FIXED_FONT:
 316         case wxSYS_SYSTEM_FIXED_FONT:
 317         {
 318             return *wxNORMAL_FONT;
 319         }
 320         case wxSYS_ANSI_VAR_FONT:
 321         case wxSYS_SYSTEM_FONT:
 322         case wxSYS_DEVICE_DEFAULT_FONT:
 323         case wxSYS_DEFAULT_GUI_FONT:
 324         {
 325             if (!gs_objects.m_fontSystem.Ok())
 326             {
 327 #ifdef __WXGTK20__
 328                 GtkWidget *widget = gtk_button_new();
 329                 GtkStyle *def = gtk_rc_get_style( widget );
 330                 if ( !def || !def->font_desc )
 331                     def = gtk_widget_get_default_style();
 332                 if ( def && def->font_desc )
 333                 {
 334                     wxNativeFontInfo info;
 335                     info.description =
 336                         pango_font_description_copy(def->font_desc);
 337                     gs_objects.m_fontSystem = wxFont(info);
 338                 }
 339                 else
 340                 {
 341                     GtkSettings *settings = gtk_settings_get_default();
 342                     gchar *font_name = NULL;
 343                     g_object_get ( settings,
 344                                    "gtk-font-name",
 345                                    &font_name,
 346                                    NULL);
 347                     if (!font_name)
 348                         gs_objects.m_fontSystem = wxFont( 12, wxSWISS, wxNORMAL, wxNORMAL );
 349                     else
 350                         gs_objects.m_fontSystem = wxFont(wxString::FromAscii(font_name));
 351                     g_free (font_name);
 352                 }
 353                 gtk_widget_destroy( widget );
 354 #else
 355                 gs_objects.m_fontSystem = wxFont( 12, wxSWISS, wxNORMAL, wxNORMAL );
 356 #endif
 357             }
 358             return gs_objects.m_fontSystem;
 359         }
 360
 361         default:
 362             return wxNullFont;
 363     }
 364 }
 365
 366 int wxSystemSettingsNative::GetMetric( wxSystemMetric index )
 367 {
 368     switch (index)
 369     {
 370         case wxSYS_SCREEN_X:   return gdk_screen_width();
 371         case wxSYS_SCREEN_Y:   return gdk_screen_height();
 372         case wxSYS_HSCROLL_Y:  return 15;
 373         case wxSYS_VSCROLL_X:  return 15;
 374
 375 #if defined(__WXGTK20__) && GTK_CHECK_VERSION(2, 4, 0)
 376         case wxSYS_DCLICK_X:
 377         case wxSYS_DCLICK_Y:
 378             gint dclick_distance;
 379             g_object_get(gtk_settings_get_default(), "gtk-double-click-distance", &dclick_distance, NULL);
 380             return dclick_distance * 2;
 381 #endif
 382
 383 #if defined(__WXGTK20__)
 384         case wxSYS_DRAG_X:
 385         case wxSYS_DRAG_Y:
 386             gint drag_threshold;
 387             g_object_get(gtk_settings_get_default(), "gtk-dnd-drag-threshold", &drag_threshold, NULL);
 388             return drag_threshold * 2;
 389 #endif
 390
 391         // VZ: is there any way to get the cursor size with GDK?
 392         // Mart Raudsepp: Yes, there is a way to get the default cursor size for a display ever since GDK 2.4
 393 #if defined(__WXGTK20__) && GTK_CHECK_VERSION(2, 4, 0)
 394         case wxSYS_CURSOR_X:
 395         case wxSYS_CURSOR_Y:
 396             return gdk_display_get_default_cursor_size(gdk_display_get_default());
 397 #else
 398         case wxSYS_CURSOR_X:   return 16;
 399         case wxSYS_CURSOR_Y:   return 16;
 400 #endif
 401         // MBN: ditto for icons
 402         case wxSYS_ICON_X:     return 32;
 403         case wxSYS_ICON_Y:     return 32;
 404         default:
 405             return -1;   // metric is unknown
 406     }
 407 }
 408
 409 bool wxSystemSettingsNative::HasFeature(wxSystemFeature index)
 410 {
 411     switch (index)
 412     {
 413         case wxSYS_CAN_ICONIZE_FRAME:
 414             return FALSE;
 415             break;
 416         case wxSYS_CAN_DRAW_FRAME_DECORATIONS:
 417             return TRUE;
 418             break;
 419         default:
 420             return FALSE;
 421     }
 422 }