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 #if GTK_CHECK_VERSION(2, 10, 0)
 138     if (!gtk_check_version(2, 10, 0))
 139         gtk_window_set_type_hint((GtkWindow*)widget, GDK_WINDOW_TYPE_HINT_TOOLTIP);
 140 #endif
 141     const char* name = "gtk-tooltip";
 142     if (gtk_check_version(2, 11, 0))
 143         name = "gtk-tooltips";
 144     gtk_widget_set_name(widget, name);
 145     gtk_widget_ensure_style(widget);
 146
 147     GdkColor c = widget->style->bg[GTK_STATE_NORMAL];
 148     gs_objects.m_colTooltip = wxColor(c);
 149     c = widget->style->fg[GTK_STATE_NORMAL];
 150     gs_objects.m_colTooltipText = wxColor(c);
 151
 152     gtk_widget_destroy(widget);
 153 }
 154
 155 wxColour wxSystemSettingsNative::GetColour( wxSystemColour index )
 156 {
 157     wxColor color;
 158     GdkColor gdkColor;
 159     switch (index)
 160     {
 161         case wxSYS_COLOUR_SCROLLBAR:
 162         case wxSYS_COLOUR_BACKGROUND:
 163         case wxSYS_COLOUR_INACTIVECAPTION:
 164         case wxSYS_COLOUR_MENU:
 165         case wxSYS_COLOUR_WINDOWFRAME:
 166         case wxSYS_COLOUR_ACTIVEBORDER:
 167         case wxSYS_COLOUR_INACTIVEBORDER:
 168         case wxSYS_COLOUR_BTNFACE:
 169         case wxSYS_COLOUR_MENUBAR:
 170         case wxSYS_COLOUR_3DLIGHT:
 171             if (!gs_objects.m_colBtnFace.Ok())
 172             {
 173                 gdkColor.red =
 174                 gdkColor.green = 0;
 175                 gdkColor.blue = 0x9c40;
 176                 GetColourFromGTKWidget(gdkColor);
 177                 gs_objects.m_colBtnFace = wxColor(gdkColor);
 178             }
 179             color = gs_objects.m_colBtnFace;
 180             break;
 181
 182         case wxSYS_COLOUR_WINDOW:
 183             color = *wxWHITE;
 184             break;
 185
 186         case wxSYS_COLOUR_3DDKSHADOW:
 187             color = *wxBLACK;
 188             break;
 189
 190         case wxSYS_COLOUR_GRAYTEXT:
 191         case wxSYS_COLOUR_BTNSHADOW:
 192         //case wxSYS_COLOUR_3DSHADOW:
 193             if (!gs_objects.m_colBtnShadow.Ok())
 194             {
 195                 wxColour faceColour(GetColour(wxSYS_COLOUR_3DFACE));
 196                 gs_objects.m_colBtnShadow =
 197                    wxColour((unsigned char) (faceColour.Red() * 2 / 3),
 198                             (unsigned char) (faceColour.Green() * 2 / 3),
 199                             (unsigned char) (faceColour.Blue() * 2 / 3));
 200             }
 201             color = gs_objects.m_colBtnShadow;
 202             break;
 203
 204         case wxSYS_COLOUR_3DHIGHLIGHT:
 205         //case wxSYS_COLOUR_BTNHIGHLIGHT:
 206             color = *wxWHITE;
 207             break;
 208
 209         case wxSYS_COLOUR_HIGHLIGHT:
 210             if (!gs_objects.m_colHighlight.Ok())
 211             {
 212                 gdkColor.red =
 213                 gdkColor.green = 0;
 214                 gdkColor.blue = 0x9c40;
 215                 GetColourFromGTKWidget(
 216                     gdkColor, wxGTK_BUTTON, GTK_STATE_SELECTED);
 217                 gs_objects.m_colHighlight = wxColour(gdkColor);
 218             }
 219             color = gs_objects.m_colHighlight;
 220             break;
 221
 222         case wxSYS_COLOUR_LISTBOX:
 223             if (!gs_objects.m_colListBox.Ok())
 224             {
 225                 if ( GetColourFromGTKWidget(gdkColor,
 226                                             wxGTK_LIST,
 227                                             GTK_STATE_NORMAL,
 228                                             wxGTK_BASE) )
 229                 {
 230                     gs_objects.m_colListBox = wxColour(gdkColor);
 231                 }
 232                 else
 233                 {
 234                     gs_objects.m_colListBox = *wxWHITE;
 235                 }
 236             }
 237             color = gs_objects.m_colListBox;
 238             break;
 239
 240         case wxSYS_COLOUR_MENUTEXT:
 241         case wxSYS_COLOUR_WINDOWTEXT:
 242         case wxSYS_COLOUR_CAPTIONTEXT:
 243         case wxSYS_COLOUR_INACTIVECAPTIONTEXT:
 244         case wxSYS_COLOUR_BTNTEXT:
 245             if (!gs_objects.m_colBtnText.Ok())
 246             {
 247                 gdkColor.red =
 248                 gdkColor.green =
 249                 gdkColor.blue = 0;
 250                 GetColourFromGTKWidget(
 251                     gdkColor, wxGTK_BUTTON, GTK_STATE_NORMAL, wxGTK_FG);
 252                 gs_objects.m_colBtnText = wxColour(gdkColor);
 253             }
 254             color = gs_objects.m_colBtnText;
 255             break;
 256
 257         case wxSYS_COLOUR_INFOBK:
 258             if (!gs_objects.m_colTooltip.Ok()) {
 259                 GetTooltipColors();
 260             }
 261             color = gs_objects.m_colTooltip;
 262             break;
 263
 264         case wxSYS_COLOUR_INFOTEXT:
 265             if (!gs_objects.m_colTooltipText.Ok()) {
 266                 GetTooltipColors();
 267             }
 268             color = gs_objects.m_colTooltipText;
 269             break;
 270
 271         case wxSYS_COLOUR_HIGHLIGHTTEXT:
 272             if (!gs_objects.m_colHighlightText.Ok())
 273             {
 274                 wxColour hclr = GetColour(wxSYS_COLOUR_HIGHLIGHT);
 275                 if (hclr.Red() > 200 && hclr.Green() > 200 && hclr.Blue() > 200)
 276                     gs_objects.m_colHighlightText = *wxBLACK;
 277                 else
 278                     gs_objects.m_colHighlightText = *wxWHITE;
 279             }
 280             color = gs_objects.m_colHighlightText;
 281             break;
 282
 283         case wxSYS_COLOUR_APPWORKSPACE:
 284             color = *wxWHITE;    // ?
 285             break;
 286
 287         case wxSYS_COLOUR_ACTIVECAPTION:
 288         case wxSYS_COLOUR_MENUHILIGHT:
 289             if (!gs_objects.m_colMenuItemHighlight.Ok())
 290             {
 291                 gdkColor.red =
 292                 gdkColor.green =
 293                 gdkColor.blue = 0;
 294                 GetColourFromGTKWidget(
 295                     gdkColor, wxGTK_MENUITEM, GTK_STATE_SELECTED, wxGTK_BG);
 296                 gs_objects.m_colMenuItemHighlight = wxColour(gdkColor);
 297             }
 298             color = gs_objects.m_colMenuItemHighlight;
 299             break;
 300
 301         case wxSYS_COLOUR_HOTLIGHT:
 302         case wxSYS_COLOUR_GRADIENTACTIVECAPTION:
 303         case wxSYS_COLOUR_GRADIENTINACTIVECAPTION:
 304             // TODO
 305             color = *wxBLACK;
 306             break;
 307
 308         case wxSYS_COLOUR_MAX:
 309         default:
 310             wxFAIL_MSG( _T("unknown system colour index") );
 311             color = *wxWHITE;
 312             break;
 313     }
 314
 315     return color;
 316 }
 317
 318 wxFont wxSystemSettingsNative::GetFont( wxSystemFont index )
 319 {
 320     wxFont font;
 321     switch (index)
 322     {
 323         case wxSYS_OEM_FIXED_FONT:
 324         case wxSYS_ANSI_FIXED_FONT:
 325         case wxSYS_SYSTEM_FIXED_FONT:
 326             font = *wxNORMAL_FONT;
 327             break;
 328
 329         case wxSYS_ANSI_VAR_FONT:
 330         case wxSYS_SYSTEM_FONT:
 331         case wxSYS_DEVICE_DEFAULT_FONT:
 332         case wxSYS_DEFAULT_GUI_FONT:
 333             if (!gs_objects.m_fontSystem.Ok())
 334             {
 335                 GtkWidget *widget = gtk_button_new();
 336                 GtkStyle *def = gtk_rc_get_style( widget );
 337                 if ( !def || !def->font_desc )
 338                     def = gtk_widget_get_default_style();
 339                 if ( def && def->font_desc )
 340                 {
 341                     wxNativeFontInfo info;
 342                     info.description =
 343                         pango_font_description_copy(def->font_desc);
 344                     gs_objects.m_fontSystem = wxFont(info);
 345                 }
 346                 else
 347                 {
 348                     GtkSettings *settings = gtk_settings_get_default();
 349                     gchar *font_name = NULL;
 350                     g_object_get ( settings,
 351                                    "gtk-font-name",
 352                                    &font_name,
 353                                    NULL);
 354                     if (!font_name)
 355                         gs_objects.m_fontSystem = wxFont( 12, wxSWISS, wxNORMAL, wxNORMAL );
 356                     else
 357                         gs_objects.m_fontSystem = wxFont(wxString::FromAscii(font_name));
 358                     g_free (font_name);
 359                 }
 360                 gtk_object_sink((GtkObject*)widget);
 361             }
 362             font = gs_objects.m_fontSystem;
 363             break;
 364
 365         default:
 366             break;
 367     }
 368     return font;
 369 }
 370
 371 static bool wxXGetWindowProperty(GdkWindow* window, Atom& type, int& format, gulong& nitems, guchar*& data)
 372 {
 373     bool success = false;
 374 #if GTK_CHECK_VERSION(2, 2, 0)
 375     if (gtk_check_version(2, 2, 0) == NULL)
 376     {
 377         gulong bytes_after;
 378         success = XGetWindowProperty(
 379             GDK_DISPLAY_XDISPLAY(gdk_drawable_get_display(window)),
 380             GDK_WINDOW_XWINDOW(window),
 381             gdk_x11_get_xatom_by_name_for_display(
 382                 gdk_drawable_get_display(window),
 383                 "_NET_FRAME_EXTENTS"),
 384             0, // left, right, top, bottom, CARDINAL[4]/32
 385             G_MAXLONG, // size of long
 386             false, // do not delete property
 387             XA_CARDINAL, // 32 bit
 388             &type, &format, &nitems, &bytes_after, &data
 389             ) == Success;
 390     }
 391 #endif
 392     return success;
 393 }
 394
 395 int wxSystemSettingsNative::GetMetric( wxSystemMetric index, wxWindow* win )
 396 {
 397     guchar *data = NULL;
 398     Atom type;
 399     int format;
 400     gulong nitems;
 401     GdkWindow *window = NULL;
 402     if(win && GTK_WIDGET_REALIZED(win->GetHandle()))
 403         window = win->GetHandle()->window;
 404
 405     switch (index)
 406     {
 407         case wxSYS_BORDER_X:
 408         case wxSYS_BORDER_Y:
 409         case wxSYS_EDGE_X:
 410         case wxSYS_EDGE_Y:
 411         case wxSYS_FRAMESIZE_X:
 412         case wxSYS_FRAMESIZE_Y:
 413             // If a window is specified/realized, and it is a toplevel window, we can query from wm.
 414             // The returned border thickness is outside the client area in that case.
 415             if (window)
 416             {
 417                 wxTopLevelWindow *tlw = wxDynamicCast(win, wxTopLevelWindow);
 418                 if (!tlw)
 419                     return -1; // not a tlw, not sure how to approach
 420                 else
 421                 {
 422                     // Check if wm supports frame extents - we can't know
 423                     // the border widths if it does not.
 424 #if GTK_CHECK_VERSION(2,2,0)
 425                     if (!gtk_check_version(2,2,0))
 426                     {
 427                         if (!gdk_x11_screen_supports_net_wm_hint(
 428                                 gdk_drawable_get_screen(window),
 429                                 gdk_atom_intern("_NET_FRAME_EXTENTS", false) ) )
 430                             return -1;
 431                     }
 432                     else
 433 #endif
 434                     {
 435                         if (!gdk_net_wm_supports(gdk_atom_intern("_NET_FRAME_EXTENTS", false)))
 436                             return -1;
 437                     }
 438
 439                     // Get the frame extents from the windowmanager.
 440                     // In most cases the top extent is the titlebar, so we use the bottom extent
 441                     // for the heights.
 442                     if (wxXGetWindowProperty(window, type, format, nitems, data))
 443                     {
 444                         int border_return = -1;
 445
 446                         if ((type == XA_CARDINAL) && (format == 32) && (nitems >= 4) && (data))
 447                         {
 448                             switch(index)
 449                             {
 450                                 case wxSYS_BORDER_X:
 451                                 case wxSYS_EDGE_X:
 452                                 case wxSYS_FRAMESIZE_X:
 453                                     border_return = int(data[1]); // width of right extent
 454                                     break;
 455                                 default:
 456                                     border_return = int(data[3]); // height of bottom extent
 457                                     break;
 458                             }
 459                         }
 460
 461                         if (data)
 462                             XFree(data);
 463
 464                         return border_return;
 465                     }
 466                 }
 467             }
 468
 469             return -1; // no window specified
 470
 471         case wxSYS_CURSOR_X:
 472         case wxSYS_CURSOR_Y:
 473 #ifdef __WXGTK24__
 474             if (!gtk_check_version(2,4,0))
 475             {
 476                 if (window)
 477                     return gdk_display_get_default_cursor_size(gdk_drawable_get_display(window));
 478                 else
 479                     return gdk_display_get_default_cursor_size(gdk_display_get_default());
 480             }
 481             else
 482 #endif
 483                 return 16;
 484
 485         case wxSYS_DCLICK_X:
 486         case wxSYS_DCLICK_Y:
 487             gint dclick_distance;
 488 #if GTK_CHECK_VERSION(2,2,0)
 489             if (window && !gtk_check_version(2,2,0))
 490                 g_object_get(gtk_settings_get_for_screen(gdk_drawable_get_screen(window)),
 491                                 "gtk-double-click-distance", &dclick_distance, NULL);
 492             else
 493 #endif
 494                 g_object_get(gtk_settings_get_default(),
 495                                 "gtk-double-click-distance", &dclick_distance, NULL);
 496
 497             return dclick_distance * 2;
 498
 499         case wxSYS_DRAG_X:
 500         case wxSYS_DRAG_Y:
 501             gint drag_threshold;
 502 #if GTK_CHECK_VERSION(2,2,0)
 503             if (window && !gtk_check_version(2,2,0))
 504             {
 505                 g_object_get(
 506                         gtk_settings_get_for_screen(gdk_drawable_get_screen(window)),
 507                         "gtk-dnd-drag-threshold",
 508                         &drag_threshold, NULL);
 509             }
 510             else
 511 #endif
 512             {
 513                 g_object_get(gtk_settings_get_default(),
 514                              "gtk-dnd-drag-threshold", &drag_threshold, NULL);
 515             }
 516
 517             // The correct thing here would be to double the value
 518             // since that is what the API wants. But the values
 519             // are much bigger under GNOME than under Windows and
 520             // just seem to much in many cases to be useful.
 521             // drag_threshold *= 2;
 522
 523             return drag_threshold;
 524
 525         // MBN: ditto for icons
 526         case wxSYS_ICON_X:     return 32;
 527         case wxSYS_ICON_Y:     return 32;
 528
 529         case wxSYS_SCREEN_X:
 530 #if GTK_CHECK_VERSION(2,2,0)
 531             if (window && !gtk_check_version(2,2,0))
 532                 return gdk_screen_get_width(gdk_drawable_get_screen(window));
 533             else
 534 #endif
 535                 return gdk_screen_width();
 536
 537         case wxSYS_SCREEN_Y:
 538 #if GTK_CHECK_VERSION(2,2,0)
 539             if (window && !gtk_check_version(2,2,0))
 540                 return gdk_screen_get_height(gdk_drawable_get_screen(window));
 541             else
 542 #endif
 543                 return gdk_screen_height();
 544
 545         case wxSYS_HSCROLL_Y:  return 15;
 546         case wxSYS_VSCROLL_X:  return 15;
 547
 548         case wxSYS_CAPTION_Y:
 549             if (!window)
 550                 // No realized window specified, and no implementation for that case yet.
 551                 return -1;
 552
 553             // Check if wm supports frame extents - we can't know the caption height if it does not.
 554 #if GTK_CHECK_VERSION(2,2,0)
 555             if (!gtk_check_version(2,2,0))
 556             {
 557                 if (!gdk_x11_screen_supports_net_wm_hint(
 558                         gdk_drawable_get_screen(window),
 559                         gdk_atom_intern("_NET_FRAME_EXTENTS", false) ) )
 560                     return -1;
 561             }
 562             else
 563 #endif
 564             {
 565                 if (!gdk_net_wm_supports(gdk_atom_intern("_NET_FRAME_EXTENTS", false)))
 566                     return -1;
 567             }
 568
 569             wxASSERT_MSG( wxDynamicCast(win, wxTopLevelWindow),
 570                           wxT("Asking for caption height of a non toplevel window") );
 571
 572             // Get the height of the top windowmanager border.
 573             // This is the titlebar in most cases. The titlebar might be elsewhere, and
 574             // we could check which is the thickest wm border to decide on which side the
 575             // titlebar is, but this might lead to interesting behaviours in used code.
 576             // Reconsider when we have a way to report to the user on which side it is.
 577             if (wxXGetWindowProperty(window, type, format, nitems, data))
 578             {
 579                 int caption_height = -1;
 580
 581                 if ((type == XA_CARDINAL) && (format == 32) && (nitems >= 3) && (data))
 582                 {
 583                     caption_height = int(data[2]); // top frame extent
 584                 }
 585
 586                 if (data)
 587                     XFree(data);
 588
 589                 return caption_height;
 590             }
 591
 592             // Try a default approach without a window pointer, if possible
 593             // ...
 594
 595             return -1;
 596
 597         case wxSYS_PENWINDOWS_PRESENT:
 598             // No MS Windows for Pen computing extension available in X11 based gtk+.
 599             return 0;
 600
 601         default:
 602             return -1;   // metric is unknown
 603     }
 604 }
 605
 606 bool wxSystemSettingsNative::HasFeature(wxSystemFeature index)
 607 {
 608     switch (index)
 609     {
 610         case wxSYS_CAN_ICONIZE_FRAME:
 611             return false;
 612
 613         case wxSYS_CAN_DRAW_FRAME_DECORATIONS:
 614             return true;
 615
 616         default:
 617             return false;
 618     }
 619 }