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_widget_destroy( widget );
 130
 131     return ok;
 132 }
 133
 134 static void GetTooltipColors()
 135 {
 136     GtkTooltips* tooltips = gtk_tooltips_new();
 137     gtk_tooltips_force_window(tooltips);
 138     gtk_widget_ensure_style(tooltips->tip_window);
 139     GdkColor c = tooltips->tip_window->style->bg[GTK_STATE_NORMAL];
 140     gs_objects.m_colTooltip = wxColor(c);
 141     c = tooltips->tip_window->style->fg[GTK_STATE_NORMAL];
 142     gs_objects.m_colTooltipText = wxColor(c);
 143 #if GTK_CHECK_VERSION(2, 9, 0)
 144     if (gtk_check_version(2, 9, 0) == NULL)
 145         g_object_ref_sink(tooltips);
 146     else
 147 #endif
 148     {
 149         gtk_object_sink((GtkObject*)tooltips);
 150     }
 151 }
 152
 153 wxColour wxSystemSettingsNative::GetColour( wxSystemColour index )
 154 {
 155     wxColor color;
 156     GdkColor gdkColor;
 157     switch (index)
 158     {
 159         case wxSYS_COLOUR_SCROLLBAR:
 160         case wxSYS_COLOUR_BACKGROUND:
 161         case wxSYS_COLOUR_INACTIVECAPTION:
 162         case wxSYS_COLOUR_MENU:
 163         case wxSYS_COLOUR_WINDOWFRAME:
 164         case wxSYS_COLOUR_ACTIVEBORDER:
 165         case wxSYS_COLOUR_INACTIVEBORDER:
 166         case wxSYS_COLOUR_BTNFACE:
 167         case wxSYS_COLOUR_MENUBAR:
 168         case wxSYS_COLOUR_3DLIGHT:
 169             if (!gs_objects.m_colBtnFace.Ok())
 170             {
 171                 gdkColor.red =
 172                 gdkColor.green = 0;
 173                 gdkColor.blue = 0x9c40;
 174                 GetColourFromGTKWidget(gdkColor);
 175                 gs_objects.m_colBtnFace = wxColor(gdkColor);
 176             }
 177             color = gs_objects.m_colBtnFace;
 178             break;
 179
 180         case wxSYS_COLOUR_WINDOW:
 181             color = *wxWHITE;
 182             break;
 183
 184         case wxSYS_COLOUR_3DDKSHADOW:
 185             color = *wxBLACK;
 186             break;
 187
 188         case wxSYS_COLOUR_GRAYTEXT:
 189         case wxSYS_COLOUR_BTNSHADOW:
 190         //case wxSYS_COLOUR_3DSHADOW:
 191             if (!gs_objects.m_colBtnShadow.Ok())
 192             {
 193                 wxColour faceColour(GetColour(wxSYS_COLOUR_3DFACE));
 194                 gs_objects.m_colBtnShadow =
 195                    wxColour((unsigned char) (faceColour.Red() * 2 / 3),
 196                             (unsigned char) (faceColour.Green() * 2 / 3),
 197                             (unsigned char) (faceColour.Blue() * 2 / 3));
 198             }
 199             color = gs_objects.m_colBtnShadow;
 200             break;
 201
 202         case wxSYS_COLOUR_3DHIGHLIGHT:
 203         //case wxSYS_COLOUR_BTNHIGHLIGHT:
 204             color = *wxWHITE;
 205             break;
 206
 207         case wxSYS_COLOUR_HIGHLIGHT:
 208             if (!gs_objects.m_colHighlight.Ok())
 209             {
 210                 gdkColor.red =
 211                 gdkColor.green = 0;
 212                 gdkColor.blue = 0x9c40;
 213                 GetColourFromGTKWidget(
 214                     gdkColor, wxGTK_BUTTON, GTK_STATE_SELECTED);
 215                 gs_objects.m_colHighlight = wxColour(gdkColor);
 216             }
 217             color = gs_objects.m_colHighlight;
 218             break;
 219
 220         case wxSYS_COLOUR_LISTBOX:
 221             if (!gs_objects.m_colListBox.Ok())
 222             {
 223                 if ( GetColourFromGTKWidget(gdkColor,
 224                                             wxGTK_LIST,
 225                                             GTK_STATE_NORMAL,
 226                                             wxGTK_BASE) )
 227                 {
 228                     gs_objects.m_colListBox = wxColour(gdkColor);
 229                 }
 230                 else
 231                 {
 232                     gs_objects.m_colListBox = *wxWHITE;
 233                 }
 234             }
 235             color = gs_objects.m_colListBox;
 236             break;
 237
 238         case wxSYS_COLOUR_MENUTEXT:
 239         case wxSYS_COLOUR_WINDOWTEXT:
 240         case wxSYS_COLOUR_CAPTIONTEXT:
 241         case wxSYS_COLOUR_INACTIVECAPTIONTEXT:
 242         case wxSYS_COLOUR_BTNTEXT:
 243             if (!gs_objects.m_colBtnText.Ok())
 244             {
 245                 gdkColor.red =
 246                 gdkColor.green =
 247                 gdkColor.blue = 0;
 248                 GetColourFromGTKWidget(
 249                     gdkColor, wxGTK_BUTTON, GTK_STATE_NORMAL, wxGTK_FG);
 250                 gs_objects.m_colBtnText = wxColour(gdkColor);
 251             }
 252             color = gs_objects.m_colBtnText;
 253             break;
 254
 255         case wxSYS_COLOUR_INFOBK:
 256             if (!gs_objects.m_colTooltip.Ok()) {
 257                 GetTooltipColors();
 258             }
 259             color = gs_objects.m_colTooltip;
 260             break;
 261
 262         case wxSYS_COLOUR_INFOTEXT:
 263             if (!gs_objects.m_colTooltipText.Ok()) {
 264                 GetTooltipColors();
 265             }
 266             color = gs_objects.m_colTooltipText;
 267             break;
 268
 269         case wxSYS_COLOUR_HIGHLIGHTTEXT:
 270             if (!gs_objects.m_colHighlightText.Ok())
 271             {
 272                 wxColour hclr = GetColour(wxSYS_COLOUR_HIGHLIGHT);
 273                 if (hclr.Red() > 200 && hclr.Green() > 200 && hclr.Blue() > 200)
 274                     gs_objects.m_colHighlightText = *wxBLACK;
 275                 else
 276                     gs_objects.m_colHighlightText = *wxWHITE;
 277             }
 278             color = gs_objects.m_colHighlightText;
 279             break;
 280
 281         case wxSYS_COLOUR_APPWORKSPACE:
 282             color = *wxWHITE;    // ?
 283             break;
 284
 285         case wxSYS_COLOUR_ACTIVECAPTION:
 286         case wxSYS_COLOUR_MENUHILIGHT:
 287             if (!gs_objects.m_colMenuItemHighlight.Ok())
 288             {
 289                 gdkColor.red =
 290                 gdkColor.green =
 291                 gdkColor.blue = 0;
 292                 GetColourFromGTKWidget(
 293                     gdkColor, wxGTK_MENUITEM, GTK_STATE_SELECTED, wxGTK_BG);
 294                 gs_objects.m_colMenuItemHighlight = wxColour(gdkColor);
 295             }
 296             color = gs_objects.m_colMenuItemHighlight;
 297             break;
 298
 299         case wxSYS_COLOUR_HOTLIGHT:
 300         case wxSYS_COLOUR_GRADIENTACTIVECAPTION:
 301         case wxSYS_COLOUR_GRADIENTINACTIVECAPTION:
 302             // TODO
 303             color = *wxBLACK;
 304             break;
 305
 306         case wxSYS_COLOUR_MAX:
 307         default:
 308             wxFAIL_MSG( _T("unknown system colour index") );
 309             color = *wxWHITE;
 310             break;
 311     }
 312
 313     return color;
 314 }
 315
 316 wxFont wxSystemSettingsNative::GetFont( wxSystemFont index )
 317 {
 318     wxFont font;
 319     switch (index)
 320     {
 321         case wxSYS_OEM_FIXED_FONT:
 322         case wxSYS_ANSI_FIXED_FONT:
 323         case wxSYS_SYSTEM_FIXED_FONT:
 324             font = *wxNORMAL_FONT;
 325             break;
 326
 327         case wxSYS_ANSI_VAR_FONT:
 328         case wxSYS_SYSTEM_FONT:
 329         case wxSYS_DEVICE_DEFAULT_FONT:
 330         case wxSYS_DEFAULT_GUI_FONT:
 331             if (!gs_objects.m_fontSystem.Ok())
 332             {
 333                 GtkWidget *widget = gtk_button_new();
 334                 GtkStyle *def = gtk_rc_get_style( widget );
 335                 if ( !def || !def->font_desc )
 336                     def = gtk_widget_get_default_style();
 337                 if ( def && def->font_desc )
 338                 {
 339                     wxNativeFontInfo info;
 340                     info.description =
 341                         pango_font_description_copy(def->font_desc);
 342                     gs_objects.m_fontSystem = wxFont(info);
 343                 }
 344                 else
 345                 {
 346                     GtkSettings *settings = gtk_settings_get_default();
 347                     gchar *font_name = NULL;
 348                     g_object_get ( settings,
 349                                    "gtk-font-name",
 350                                    &font_name,
 351                                    NULL);
 352                     if (!font_name)
 353                         gs_objects.m_fontSystem = wxFont( 12, wxSWISS, wxNORMAL, wxNORMAL );
 354                     else
 355                         gs_objects.m_fontSystem = wxFont(wxString::FromAscii(font_name));
 356                     g_free (font_name);
 357                 }
 358                 gtk_widget_destroy( widget );
 359             }
 360             font = gs_objects.m_fontSystem;
 361             break;
 362
 363         default:
 364             break;
 365     }
 366     return font;
 367 }
 368
 369 static bool wxXGetWindowProperty(GdkWindow* window, Atom& type, int& format, gulong& nitems, guchar*& data)
 370 {
 371     bool success = false;
 372 #if GTK_CHECK_VERSION(2, 2, 0)
 373     if (gtk_check_version(2, 2, 0) == NULL)
 374     {
 375         gulong bytes_after;
 376         success = XGetWindowProperty(
 377             GDK_DISPLAY_XDISPLAY(gdk_drawable_get_display(window)),
 378             GDK_WINDOW_XWINDOW(window),
 379             gdk_x11_get_xatom_by_name_for_display(
 380                 gdk_drawable_get_display(window),
 381                 "_NET_FRAME_EXTENTS"),
 382             0, // left, right, top, bottom, CARDINAL[4]/32
 383             G_MAXLONG, // size of long
 384             false, // do not delete property
 385             XA_CARDINAL, // 32 bit
 386             &type, &format, &nitems, &bytes_after, &data
 387             ) == Success;
 388     }
 389 #endif
 390     return success;
 391 }
 392
 393 int wxSystemSettingsNative::GetMetric( wxSystemMetric index, wxWindow* win )
 394 {
 395     guchar *data = NULL;
 396     Atom type;
 397     int format;
 398     gulong nitems;
 399     GdkWindow *window = NULL;
 400     if(win && GTK_WIDGET_REALIZED(win->GetHandle()))
 401         window = win->GetHandle()->window;
 402
 403     switch (index)
 404     {
 405         case wxSYS_BORDER_X:
 406         case wxSYS_BORDER_Y:
 407         case wxSYS_EDGE_X:
 408         case wxSYS_EDGE_Y:
 409         case wxSYS_FRAMESIZE_X:
 410         case wxSYS_FRAMESIZE_Y:
 411             // If a window is specified/realized, and it is a toplevel window, we can query from wm.
 412             // The returned border thickness is outside the client area in that case.
 413             if (window)
 414             {
 415                 wxTopLevelWindow *tlw = wxDynamicCast(win, wxTopLevelWindow);
 416                 if (!tlw)
 417                     return -1; // not a tlw, not sure how to approach
 418                 else
 419                 {
 420                     // Check if wm supports frame extents - we can't know
 421                     // the border widths if it does not.
 422 #if GTK_CHECK_VERSION(2,2,0)
 423                     if (!gtk_check_version(2,2,0))
 424                     {
 425                         if (!gdk_x11_screen_supports_net_wm_hint(
 426                                 gdk_drawable_get_screen(window),
 427                                 gdk_atom_intern("_NET_FRAME_EXTENTS", false) ) )
 428                             return -1;
 429                     }
 430                     else
 431 #endif
 432                     {
 433                         if (!gdk_net_wm_supports(gdk_atom_intern("_NET_FRAME_EXTENTS", false)))
 434                             return -1;
 435                     }
 436
 437                     // Get the frame extents from the windowmanager.
 438                     // In most cases the top extent is the titlebar, so we use the bottom extent
 439                     // for the heights.
 440                     if (wxXGetWindowProperty(window, type, format, nitems, data))
 441                     {
 442                         int border_return = -1;
 443
 444                         if ((type == XA_CARDINAL) && (format == 32) && (nitems >= 4) && (data))
 445                         {
 446                             switch(index)
 447                             {
 448                                 case wxSYS_BORDER_X:
 449                                 case wxSYS_EDGE_X:
 450                                 case wxSYS_FRAMESIZE_X:
 451                                     border_return = int(data[1]); // width of right extent
 452                                     break;
 453                                 default:
 454                                     border_return = int(data[3]); // height of bottom extent
 455                                     break;
 456                             }
 457                         }
 458
 459                         if (data)
 460                             XFree(data);
 461
 462                         return border_return;
 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_DRAG_X:
 498         case wxSYS_DRAG_Y:
 499             gint drag_threshold;
 500 #if GTK_CHECK_VERSION(2,2,0)
 501             if (window && !gtk_check_version(2,2,0))
 502             {
 503                 g_object_get(
 504                         gtk_settings_get_for_screen(gdk_drawable_get_screen(window)),
 505                         "gtk-dnd-drag-threshold",
 506                         &drag_threshold, NULL);
 507             }
 508             else
 509 #endif
 510             {
 511                 g_object_get(gtk_settings_get_default(),
 512                              "gtk-dnd-drag-threshold", &drag_threshold, NULL);
 513             }
 514
 515             // The correct thing here would be to double the value
 516             // since that is what the API wants. But the values
 517             // are much bigger under GNOME than under Windows and
 518             // just seem to much in many cases to be useful.
 519             // drag_threshold *= 2;
 520
 521             return drag_threshold;
 522
 523         // MBN: ditto for icons
 524         case wxSYS_ICON_X:     return 32;
 525         case wxSYS_ICON_Y:     return 32;
 526
 527         case wxSYS_SCREEN_X:
 528 #if GTK_CHECK_VERSION(2,2,0)
 529             if (window && !gtk_check_version(2,2,0))
 530                 return gdk_screen_get_width(gdk_drawable_get_screen(window));
 531             else
 532 #endif
 533                 return gdk_screen_width();
 534
 535         case wxSYS_SCREEN_Y:
 536 #if GTK_CHECK_VERSION(2,2,0)
 537             if (window && !gtk_check_version(2,2,0))
 538                 return gdk_screen_get_height(gdk_drawable_get_screen(window));
 539             else
 540 #endif
 541                 return gdk_screen_height();
 542
 543         case wxSYS_HSCROLL_Y:  return 15;
 544         case wxSYS_VSCROLL_X:  return 15;
 545
 546         case wxSYS_CAPTION_Y:
 547             if (!window)
 548                 // No realized window specified, and no implementation for that case yet.
 549                 return -1;
 550
 551             // Check if wm supports frame extents - we can't know the caption height if it does not.
 552 #if GTK_CHECK_VERSION(2,2,0)
 553             if (!gtk_check_version(2,2,0))
 554             {
 555                 if (!gdk_x11_screen_supports_net_wm_hint(
 556                         gdk_drawable_get_screen(window),
 557                         gdk_atom_intern("_NET_FRAME_EXTENTS", false) ) )
 558                     return -1;
 559             }
 560             else
 561 #endif
 562             {
 563                 if (!gdk_net_wm_supports(gdk_atom_intern("_NET_FRAME_EXTENTS", false)))
 564                     return -1;
 565             }
 566
 567             wxASSERT_MSG( wxDynamicCast(win, wxTopLevelWindow),
 568                           wxT("Asking for caption height of a non toplevel window") );
 569
 570             // Get the height of the top windowmanager border.
 571             // This is the titlebar in most cases. The titlebar might be elsewhere, and
 572             // we could check which is the thickest wm border to decide on which side the
 573             // titlebar is, but this might lead to interesting behaviours in used code.
 574             // Reconsider when we have a way to report to the user on which side it is.
 575             if (wxXGetWindowProperty(window, type, format, nitems, data))
 576             {
 577                 int caption_height = -1;
 578
 579                 if ((type == XA_CARDINAL) && (format == 32) && (nitems >= 3) && (data))
 580                 {
 581                     caption_height = int(data[2]); // top frame extent
 582                 }
 583
 584                 if (data)
 585                     XFree(data);
 586
 587                 return caption_height;
 588             }
 589
 590             // Try a default approach without a window pointer, if possible
 591             // ...
 592
 593             return -1;
 594
 595         case wxSYS_PENWINDOWS_PRESENT:
 596             // No MS Windows for Pen computing extension available in X11 based gtk+.
 597             return 0;
 598
 599         default:
 600             return -1;   // metric is unknown
 601     }
 602 }
 603
 604 bool wxSystemSettingsNative::HasFeature(wxSystemFeature index)
 605 {
 606     switch (index)
 607     {
 608         case wxSYS_CAN_ICONIZE_FRAME:
 609             return false;
 610
 611         case wxSYS_CAN_DRAW_FRAME_DECORATIONS:
 612             return true;
 613
 614         default:
 615             return false;
 616     }
 617 }