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