src/gtk/settings.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk/settings.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Modified by: Mart Raudsepp (GetMetric)
   6 // Id:          $Id$
   7 // Copyright:   (c) 1998 Robert Roebling
   8 // Licence:     wxWindows licence
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11 // For compilers that support precompilation, includes "wx.h".
  12 #include "wx/wxprec.h"
  13
  14 #include "wx/settings.h"
  15
  16 #ifndef WX_PRECOMP
  17     #include "wx/cmndata.h"
  18     #include "wx/toplevel.h"
  19 #endif
  20
  21 #include "wx/fontutil.h"
  22
  23 #include <gtk/gtkversion.h>
  24 #if GTK_CHECK_VERSION(2, 9, 0)
  25     // gtk_object_sink
  26     #undef GTK_DISABLE_DEPRECATED
  27 #endif
  28 #include <gtk/gtk.h>
  29 #include <gdk/gdkx.h>
  30
  31 #include <X11/Xatom.h>
  32
  33 // ----------------------------------------------------------------------------
  34 // wxSystemObjects
  35 // ----------------------------------------------------------------------------
  36
  37 struct wxSystemObjects
  38 {
  39     wxColour m_colBtnFace,
  40              m_colBtnShadow,
  41              m_colBtnHighlight,
  42              m_colHighlight,
  43              m_colHighlightText,
  44              m_colListBox,
  45              m_colBtnText,
  46              m_colMenuItemHighlight,
  47              m_colTooltip,
  48              m_colTooltipText;
  49
  50     wxFont m_fontSystem;
  51 };
  52
  53 static wxSystemObjects gs_objects;
  54
  55 // ----------------------------------------------------------------------------
  56 // wxSystemSettings implementation
  57 // ----------------------------------------------------------------------------
  58
  59 // kind of widget to use in GetColourFromGTKWidget
  60 enum wxGtkWidgetType
  61 {
  62     wxGTK_BUTTON,
  63     wxGTK_LIST,
  64     wxGTK_MENUITEM
  65 };
  66
  67 // the colour we need
  68 enum wxGtkColourType
  69 {
  70     wxGTK_FG,
  71     wxGTK_BG,
  72     wxGTK_BASE
  73 };
  74
  75 // wxSystemSettings::GetColour() helper: get the colours from a GTK+
  76 // widget style, return true if we did get them
  77 static bool GetColourFromGTKWidget(GdkColor& gdkColor,
  78                                    wxGtkWidgetType type = wxGTK_BUTTON,
  79                                    GtkStateType state = GTK_STATE_NORMAL,
  80                                    wxGtkColourType colour = wxGTK_BG)
  81 {
  82     GtkWidget *widget;
  83     switch ( type )
  84     {
  85         default:
  86             wxFAIL_MSG( _T("unexpected GTK widget type") );
  87             // fall through
  88
  89         case wxGTK_BUTTON:
  90             widget = gtk_button_new();
  91             break;
  92
  93         case wxGTK_LIST:
  94             widget = gtk_tree_view_new_with_model(
  95                 (GtkTreeModel*)gtk_list_store_new(1, G_TYPE_INT));
  96             break;
  97
  98         case wxGTK_MENUITEM:
  99             widget = gtk_menu_item_new();
 100     }
 101
 102     GtkStyle *def = gtk_rc_get_style( widget );
 103     if ( !def )
 104         def = gtk_widget_get_default_style();
 105
 106     const bool ok = def != NULL;
 107     if (ok)
 108     {
 109         switch ( colour )
 110         {
 111             default:
 112                 wxFAIL_MSG( _T("unexpected GTK colour type") );
 113                 // fall through
 114
 115             case wxGTK_FG:
 116                 gdkColor = def->fg[state];
 117                 break;
 118
 119             case wxGTK_BG:
 120                 gdkColor = def->bg[state];
 121                 break;
 122
 123             case wxGTK_BASE:
 124                 gdkColor = def->base[state];
 125                 break;
 126         }
 127     }
 128
 129     gtk_object_sink((GtkObject*)widget);
 130
 131     return ok;
 132 }
 133
 134 static void GetTooltipColors()
 135 {
 136     GtkWidget* widget = gtk_window_new(GTK_WINDOW_POPUP);
 137     const char* name = "gtk-tooltip";
 138     if (gtk_check_version(2, 11, 0))
 139         name = "gtk-tooltips";
 140     gtk_widget_set_name(widget, name);
 141     gtk_widget_ensure_style(widget);
 142
 143     GdkColor c = widget->style->bg[GTK_STATE_NORMAL];
 144     gs_objects.m_colTooltip = wxColor(c);
 145     c = widget->style->fg[GTK_STATE_NORMAL];
 146     gs_objects.m_colTooltipText = wxColor(c);
 147
 148     gtk_widget_destroy(widget);
 149 }
 150
 151 wxColour wxSystemSettingsNative::GetColour( wxSystemColour index )
 152 {
 153     wxColor color;
 154     GdkColor gdkColor;
 155     switch (index)
 156     {
 157         case wxSYS_COLOUR_SCROLLBAR:
 158         case wxSYS_COLOUR_BACKGROUND:
 159         case wxSYS_COLOUR_INACTIVECAPTION:
 160         case wxSYS_COLOUR_MENU:
 161         case wxSYS_COLOUR_WINDOWFRAME:
 162         case wxSYS_COLOUR_ACTIVEBORDER:
 163         case wxSYS_COLOUR_INACTIVEBORDER:
 164         case wxSYS_COLOUR_BTNFACE:
 165         case wxSYS_COLOUR_MENUBAR:
 166         case wxSYS_COLOUR_3DLIGHT:
 167             if (!gs_objects.m_colBtnFace.Ok())
 168             {
 169                 gdkColor.red =
 170                 gdkColor.green = 0;
 171                 gdkColor.blue = 0x9c40;
 172                 GetColourFromGTKWidget(gdkColor);
 173                 gs_objects.m_colBtnFace = wxColor(gdkColor);
 174             }
 175             color = gs_objects.m_colBtnFace;
 176             break;
 177
 178         case wxSYS_COLOUR_WINDOW:
 179             color = *wxWHITE;
 180             break;
 181
 182         case wxSYS_COLOUR_3DDKSHADOW:
 183             color = *wxBLACK;
 184             break;
 185
 186         case wxSYS_COLOUR_GRAYTEXT:
 187         case wxSYS_COLOUR_BTNSHADOW:
 188         //case wxSYS_COLOUR_3DSHADOW:
 189             if (!gs_objects.m_colBtnShadow.Ok())
 190             {
 191                 wxColour faceColour(GetColour(wxSYS_COLOUR_3DFACE));
 192                 gs_objects.m_colBtnShadow =
 193                    wxColour((unsigned char) (faceColour.Red() * 2 / 3),
 194                             (unsigned char) (faceColour.Green() * 2 / 3),
 195                             (unsigned char) (faceColour.Blue() * 2 / 3));
 196             }
 197             color = gs_objects.m_colBtnShadow;
 198             break;
 199
 200         case wxSYS_COLOUR_3DHIGHLIGHT:
 201         //case wxSYS_COLOUR_BTNHIGHLIGHT:
 202             color = *wxWHITE;
 203             break;
 204
 205         case wxSYS_COLOUR_HIGHLIGHT:
 206             if (!gs_objects.m_colHighlight.Ok())
 207             {
 208                 gdkColor.red =
 209                 gdkColor.green = 0;
 210                 gdkColor.blue = 0x9c40;
 211                 GetColourFromGTKWidget(
 212                     gdkColor, wxGTK_BUTTON, GTK_STATE_SELECTED);
 213                 gs_objects.m_colHighlight = wxColour(gdkColor);
 214             }
 215             color = gs_objects.m_colHighlight;
 216             break;
 217
 218         case wxSYS_COLOUR_LISTBOX:
 219             if (!gs_objects.m_colListBox.Ok())
 220             {
 221                 if ( GetColourFromGTKWidget(gdkColor,
 222                                             wxGTK_LIST,
 223                                             GTK_STATE_NORMAL,
 224                                             wxGTK_BASE) )
 225                 {
 226                     gs_objects.m_colListBox = wxColour(gdkColor);
 227                 }
 228                 else
 229                 {
 230                     gs_objects.m_colListBox = *wxWHITE;
 231                 }
 232             }
 233             color = gs_objects.m_colListBox;
 234             break;
 235
 236         case wxSYS_COLOUR_MENUTEXT:
 237         case wxSYS_COLOUR_WINDOWTEXT:
 238         case wxSYS_COLOUR_CAPTIONTEXT:
 239         case wxSYS_COLOUR_INACTIVECAPTIONTEXT:
 240         case wxSYS_COLOUR_BTNTEXT:
 241             if (!gs_objects.m_colBtnText.Ok())
 242             {
 243                 gdkColor.red =
 244                 gdkColor.green =
 245                 gdkColor.blue = 0;
 246                 GetColourFromGTKWidget(
 247                     gdkColor, wxGTK_BUTTON, GTK_STATE_NORMAL, wxGTK_FG);
 248                 gs_objects.m_colBtnText = wxColour(gdkColor);
 249             }
 250             color = gs_objects.m_colBtnText;
 251             break;
 252
 253         case wxSYS_COLOUR_INFOBK:
 254             if (!gs_objects.m_colTooltip.Ok()) {
 255                 GetTooltipColors();
 256             }
 257             color = gs_objects.m_colTooltip;
 258             break;
 259
 260         case wxSYS_COLOUR_INFOTEXT:
 261             if (!gs_objects.m_colTooltipText.Ok()) {
 262                 GetTooltipColors();
 263             }
 264             color = gs_objects.m_colTooltipText;
 265             break;
 266
 267         case wxSYS_COLOUR_HIGHLIGHTTEXT:
 268             if (!gs_objects.m_colHighlightText.Ok())
 269             {
 270                 wxColour hclr = GetColour(wxSYS_COLOUR_HIGHLIGHT);
 271                 if (hclr.Red() > 200 && hclr.Green() > 200 && hclr.Blue() > 200)
 272                     gs_objects.m_colHighlightText = *wxBLACK;
 273                 else
 274                     gs_objects.m_colHighlightText = *wxWHITE;
 275             }
 276             color = gs_objects.m_colHighlightText;
 277             break;
 278
 279         case wxSYS_COLOUR_APPWORKSPACE:
 280             color = *wxWHITE;    // ?
 281             break;
 282
 283         case wxSYS_COLOUR_ACTIVECAPTION:
 284         case wxSYS_COLOUR_MENUHILIGHT:
 285             if (!gs_objects.m_colMenuItemHighlight.Ok())
 286             {
 287                 gdkColor.red =
 288                 gdkColor.green =
 289                 gdkColor.blue = 0;
 290                 GetColourFromGTKWidget(
 291                     gdkColor, wxGTK_MENUITEM, GTK_STATE_SELECTED, wxGTK_BG);
 292                 gs_objects.m_colMenuItemHighlight = wxColour(gdkColor);
 293             }
 294             color = gs_objects.m_colMenuItemHighlight;
 295             break;
 296
 297         case wxSYS_COLOUR_HOTLIGHT:
 298         case wxSYS_COLOUR_GRADIENTACTIVECAPTION:
 299         case wxSYS_COLOUR_GRADIENTINACTIVECAPTION:
 300             // TODO
 301             color = *wxBLACK;
 302             break;
 303
 304         case wxSYS_COLOUR_MAX:
 305         default:
 306             wxFAIL_MSG( _T("unknown system colour index") );
 307             color = *wxWHITE;
 308             break;
 309     }
 310
 311     return color;
 312 }
 313
 314 wxFont wxSystemSettingsNative::GetFont( wxSystemFont index )
 315 {
 316     wxFont font;
 317     switch (index)
 318     {
 319         case wxSYS_OEM_FIXED_FONT:
 320         case wxSYS_ANSI_FIXED_FONT:
 321         case wxSYS_SYSTEM_FIXED_FONT:
 322             font = *wxNORMAL_FONT;
 323             break;
 324
 325         case wxSYS_ANSI_VAR_FONT:
 326         case wxSYS_SYSTEM_FONT:
 327         case wxSYS_DEVICE_DEFAULT_FONT:
 328         case wxSYS_DEFAULT_GUI_FONT:
 329             if (!gs_objects.m_fontSystem.Ok())
 330             {
 331                 GtkWidget *widget = gtk_button_new();
 332                 GtkStyle *def = gtk_rc_get_style( widget );
 333                 if ( !def || !def->font_desc )
 334                     def = gtk_widget_get_default_style();
 335                 if ( def && def->font_desc )
 336                 {
 337                     wxNativeFontInfo info;
 338                     info.description =
 339                         pango_font_description_copy(def->font_desc);
 340                     gs_objects.m_fontSystem = wxFont(info);
 341                 }
 342                 else
 343                 {
 344                     GtkSettings *settings = gtk_settings_get_default();
 345                     gchar *font_name = NULL;
 346                     g_object_get ( settings,
 347                                    "gtk-font-name",
 348                                    &font_name,
 349                                    NULL);
 350                     if (!font_name)
 351                         gs_objects.m_fontSystem = wxFont( 12, wxSWISS, wxNORMAL, wxNORMAL );
 352                     else
 353                         gs_objects.m_fontSystem = wxFont(wxString::FromAscii(font_name));
 354                     g_free (font_name);
 355                 }
 356                 gtk_object_sink((GtkObject*)widget);
 357             }
 358             font = gs_objects.m_fontSystem;
 359             break;
 360
 361         default:
 362             break;
 363     }
 364     return font;
 365 }
 366
 367 static bool GetFrameExtents(GdkWindow* window, int* left, int* right, int* top, int* bottom)
 368 {
 369     bool success = false;
 370     Atom property = 0;
 371 #if GTK_CHECK_VERSION(2, 2, 0)
 372     if (gtk_check_version(2, 2, 0) == NULL)
 373     {
 374         if (gdk_x11_screen_supports_net_wm_hint(
 375                 gdk_drawable_get_screen(window),
 376                 gdk_atom_intern("_NET_FRAME_EXTENTS", false)))
 377         {
 378             success = true;
 379             property = gdk_x11_get_xatom_by_name_for_display(
 380                 gdk_drawable_get_display(window),
 381                 "_NET_FRAME_EXTENTS");
 382         }
 383     }
 384     else
 385 #endif
 386     {
 387         if (gdk_net_wm_supports(gdk_atom_intern("_NET_FRAME_EXTENTS", false)))
 388         {
 389             success = true;
 390             property = gdk_x11_get_xatom_by_name("_NET_FRAME_EXTENTS");
 391         }
 392     }
 393     if (success)
 394     {
 395         Atom type;
 396         int format;
 397         gulong nitems, bytes_after;
 398         long* data = NULL;
 399         success = XGetWindowProperty(
 400             gdk_x11_drawable_get_xdisplay(window),
 401             gdk_x11_drawable_get_xid(window),
 402             property,
 403             0, 4,
 404             false,
 405             XA_CARDINAL,
 406             &type, &format, &nitems, &bytes_after, (guchar**)&data
 407             ) == Success;
 408         if (success)
 409         {
 410             success = data && nitems == 4;
 411             if (success)
 412             {
 413                 if (left)   *left   = int(data[0]);
 414                 if (right)  *right  = int(data[1]);
 415                 if (top)    *top    = int(data[2]);
 416                 if (bottom) *bottom = int(data[3]);
 417             }
 418             if (data)
 419                 XFree(data);
 420         }
 421     }
 422     return success;
 423 }
 424
 425 int wxSystemSettingsNative::GetMetric( wxSystemMetric index, wxWindow* win )
 426 {
 427     GdkWindow *window = NULL;
 428     if(win && GTK_WIDGET_REALIZED(win->GetHandle()))
 429         window = win->GetHandle()->window;
 430
 431     switch (index)
 432     {
 433         case wxSYS_BORDER_X:
 434         case wxSYS_BORDER_Y:
 435         case wxSYS_EDGE_X:
 436         case wxSYS_EDGE_Y:
 437         case wxSYS_FRAMESIZE_X:
 438         case wxSYS_FRAMESIZE_Y:
 439             // If a window is specified/realized, and it is a toplevel window, we can query from wm.
 440             // The returned border thickness is outside the client area in that case.
 441             if (window)
 442             {
 443                 wxTopLevelWindow *tlw = wxDynamicCast(win, wxTopLevelWindow);
 444                 if (!tlw)
 445                     return -1; // not a tlw, not sure how to approach
 446                 else
 447                 {
 448                     // Get the frame extents from the windowmanager.
 449                     // In most cases the top extent is the titlebar, so we use the bottom extent
 450                     // for the heights.
 451                     int right, bottom;
 452                     if (GetFrameExtents(window, NULL, &right, NULL, &bottom))
 453                     {
 454                         switch (index)
 455                         {
 456                             case wxSYS_BORDER_X:
 457                             case wxSYS_EDGE_X:
 458                             case wxSYS_FRAMESIZE_X:
 459                                 return right; // width of right extent
 460                             default:
 461                                 return bottom; // height of bottom extent
 462                         }
 463                     }
 464                 }
 465             }
 466
 467             return -1; // no window specified
 468
 469         case wxSYS_CURSOR_X:
 470         case wxSYS_CURSOR_Y:
 471 #ifdef __WXGTK24__
 472             if (!gtk_check_version(2,4,0))
 473             {
 474                 if (window)
 475                     return gdk_display_get_default_cursor_size(gdk_drawable_get_display(window));
 476                 else
 477                     return gdk_display_get_default_cursor_size(gdk_display_get_default());
 478             }
 479             else
 480 #endif
 481                 return 16;
 482
 483         case wxSYS_DCLICK_X:
 484         case wxSYS_DCLICK_Y:
 485             gint dclick_distance;
 486 #if GTK_CHECK_VERSION(2,2,0)
 487             if (window && !gtk_check_version(2,2,0))
 488                 g_object_get(gtk_settings_get_for_screen(gdk_drawable_get_screen(window)),
 489                                 "gtk-double-click-distance", &dclick_distance, NULL);
 490             else
 491 #endif
 492                 g_object_get(gtk_settings_get_default(),
 493                                 "gtk-double-click-distance", &dclick_distance, NULL);
 494
 495             return dclick_distance * 2;
 496
 497         case wxSYS_DCLICK_MSEC:
 498             gint dclick;
 499             g_object_get(gtk_settings_get_default(),
 500                             "gtk-double-click-time", &dclick, NULL);
 501             return dclick;
 502
 503         case wxSYS_DRAG_X:
 504         case wxSYS_DRAG_Y:
 505             gint drag_threshold;
 506 #if GTK_CHECK_VERSION(2,2,0)
 507             if (window && !gtk_check_version(2,2,0))
 508             {
 509                 g_object_get(
 510                         gtk_settings_get_for_screen(gdk_drawable_get_screen(window)),
 511                         "gtk-dnd-drag-threshold",
 512                         &drag_threshold, NULL);
 513             }
 514             else
 515 #endif
 516             {
 517                 g_object_get(gtk_settings_get_default(),
 518                              "gtk-dnd-drag-threshold", &drag_threshold, NULL);
 519             }
 520
 521             // The correct thing here would be to double the value
 522             // since that is what the API wants. But the values
 523             // are much bigger under GNOME than under Windows and
 524             // just seem to much in many cases to be useful.
 525             // drag_threshold *= 2;
 526
 527             return drag_threshold;
 528
 529         // MBN: ditto for icons
 530         case wxSYS_ICON_X:     return 32;
 531         case wxSYS_ICON_Y:     return 32;
 532
 533         case wxSYS_SCREEN_X:
 534 #if GTK_CHECK_VERSION(2,2,0)
 535             if (window && !gtk_check_version(2,2,0))
 536                 return gdk_screen_get_width(gdk_drawable_get_screen(window));
 537             else
 538 #endif
 539                 return gdk_screen_width();
 540
 541         case wxSYS_SCREEN_Y:
 542 #if GTK_CHECK_VERSION(2,2,0)
 543             if (window && !gtk_check_version(2,2,0))
 544                 return gdk_screen_get_height(gdk_drawable_get_screen(window));
 545             else
 546 #endif
 547                 return gdk_screen_height();
 548
 549         case wxSYS_HSCROLL_Y:  return 15;
 550         case wxSYS_VSCROLL_X:  return 15;
 551
 552         case wxSYS_CAPTION_Y:
 553             if (!window)
 554                 // No realized window specified, and no implementation for that case yet.
 555                 return -1;
 556
 557             wxASSERT_MSG( wxDynamicCast(win, wxTopLevelWindow),
 558                           wxT("Asking for caption height of a non toplevel window") );
 559
 560             // Get the height of the top windowmanager border.
 561             // This is the titlebar in most cases. The titlebar might be elsewhere, and
 562             // we could check which is the thickest wm border to decide on which side the
 563             // titlebar is, but this might lead to interesting behaviours in used code.
 564             // Reconsider when we have a way to report to the user on which side it is.
 565             {
 566                 int top;
 567                 if (GetFrameExtents(window, NULL, NULL, &top, NULL))
 568                 {
 569                     return top; // top frame extent
 570                 }
 571             }
 572
 573             // Try a default approach without a window pointer, if possible
 574             // ...
 575
 576             return -1;
 577
 578         case wxSYS_PENWINDOWS_PRESENT:
 579             // No MS Windows for Pen computing extension available in X11 based gtk+.
 580             return 0;
 581
 582         default:
 583             return -1;   // metric is unknown
 584     }
 585 }
 586
 587 bool wxSystemSettingsNative::HasFeature(wxSystemFeature index)
 588 {
 589     switch (index)
 590     {
 591         case wxSYS_CAN_ICONIZE_FRAME:
 592             return false;
 593
 594         case wxSYS_CAN_DRAW_FRAME_DECORATIONS:
 595             return true;
 596
 597         default:
 598             return false;
 599     }
 600 }