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     GtkTooltips* tooltips = gtk_tooltips_new();
 137     gtk_tooltips_force_window(tooltips);
 138
 139     // FIXME: In 2.11.6 tip_window is private and always NULL so
 140     // we need to do something different if there is no window.
 141     // See https://sourceforge.net/tracker/index.php?func=detail&aid=1767485&group_id=9863&atid=109863
 142     if (tooltips->tip_window)
 143     {
 144         gtk_widget_ensure_style(tooltips->tip_window);
 145         GdkColor c = tooltips->tip_window->style->bg[GTK_STATE_NORMAL];
 146         gs_objects.m_colTooltip = wxColor(c);
 147         c = tooltips->tip_window->style->fg[GTK_STATE_NORMAL];
 148         gs_objects.m_colTooltipText = wxColor(c);
 149     }
 150     else
 151     {
 152         gs_objects.m_colTooltipText = wxColour(255, 255, 128); // FIXME
 153     }
 154
 155     gtk_object_sink((GtkObject*)tooltips);
 156 }
 157
 158 wxColour wxSystemSettingsNative::GetColour( wxSystemColour index )
 159 {
 160     wxColor color;
 161     GdkColor gdkColor;
 162     switch (index)
 163     {
 164         case wxSYS_COLOUR_SCROLLBAR:
 165         case wxSYS_COLOUR_BACKGROUND:
 166         case wxSYS_COLOUR_INACTIVECAPTION:
 167         case wxSYS_COLOUR_MENU:
 168         case wxSYS_COLOUR_WINDOWFRAME:
 169         case wxSYS_COLOUR_ACTIVEBORDER:
 170         case wxSYS_COLOUR_INACTIVEBORDER:
 171         case wxSYS_COLOUR_BTNFACE:
 172         case wxSYS_COLOUR_MENUBAR:
 173         case wxSYS_COLOUR_3DLIGHT:
 174             if (!gs_objects.m_colBtnFace.Ok())
 175             {
 176                 gdkColor.red =
 177                 gdkColor.green = 0;
 178                 gdkColor.blue = 0x9c40;
 179                 GetColourFromGTKWidget(gdkColor);
 180                 gs_objects.m_colBtnFace = wxColor(gdkColor);
 181             }
 182             color = gs_objects.m_colBtnFace;
 183             break;
 184
 185         case wxSYS_COLOUR_WINDOW:
 186             color = *wxWHITE;
 187             break;
 188
 189         case wxSYS_COLOUR_3DDKSHADOW:
 190             color = *wxBLACK;
 191             break;
 192
 193         case wxSYS_COLOUR_GRAYTEXT:
 194         case wxSYS_COLOUR_BTNSHADOW:
 195         //case wxSYS_COLOUR_3DSHADOW:
 196             if (!gs_objects.m_colBtnShadow.Ok())
 197             {
 198                 wxColour faceColour(GetColour(wxSYS_COLOUR_3DFACE));
 199                 gs_objects.m_colBtnShadow =
 200                    wxColour((unsigned char) (faceColour.Red() * 2 / 3),
 201                             (unsigned char) (faceColour.Green() * 2 / 3),
 202                             (unsigned char) (faceColour.Blue() * 2 / 3));
 203             }
 204             color = gs_objects.m_colBtnShadow;
 205             break;
 206
 207         case wxSYS_COLOUR_3DHIGHLIGHT:
 208         //case wxSYS_COLOUR_BTNHIGHLIGHT:
 209             color = *wxWHITE;
 210             break;
 211
 212         case wxSYS_COLOUR_HIGHLIGHT:
 213             if (!gs_objects.m_colHighlight.Ok())
 214             {
 215                 gdkColor.red =
 216                 gdkColor.green = 0;
 217                 gdkColor.blue = 0x9c40;
 218                 GetColourFromGTKWidget(
 219                     gdkColor, wxGTK_BUTTON, GTK_STATE_SELECTED);
 220                 gs_objects.m_colHighlight = wxColour(gdkColor);
 221             }
 222             color = gs_objects.m_colHighlight;
 223             break;
 224
 225         case wxSYS_COLOUR_LISTBOX:
 226             if (!gs_objects.m_colListBox.Ok())
 227             {
 228                 if ( GetColourFromGTKWidget(gdkColor,
 229                                             wxGTK_LIST,
 230                                             GTK_STATE_NORMAL,
 231                                             wxGTK_BASE) )
 232                 {
 233                     gs_objects.m_colListBox = wxColour(gdkColor);
 234                 }
 235                 else
 236                 {
 237                     gs_objects.m_colListBox = *wxWHITE;
 238                 }
 239             }
 240             color = gs_objects.m_colListBox;
 241             break;
 242
 243         case wxSYS_COLOUR_MENUTEXT:
 244         case wxSYS_COLOUR_WINDOWTEXT:
 245         case wxSYS_COLOUR_CAPTIONTEXT:
 246         case wxSYS_COLOUR_INACTIVECAPTIONTEXT:
 247         case wxSYS_COLOUR_BTNTEXT:
 248             if (!gs_objects.m_colBtnText.Ok())
 249             {
 250                 gdkColor.red =
 251                 gdkColor.green =
 252                 gdkColor.blue = 0;
 253                 GetColourFromGTKWidget(
 254                     gdkColor, wxGTK_BUTTON, GTK_STATE_NORMAL, wxGTK_FG);
 255                 gs_objects.m_colBtnText = wxColour(gdkColor);
 256             }
 257             color = gs_objects.m_colBtnText;
 258             break;
 259
 260         case wxSYS_COLOUR_INFOBK:
 261             if (!gs_objects.m_colTooltip.Ok()) {
 262                 GetTooltipColors();
 263             }
 264             color = gs_objects.m_colTooltip;
 265             break;
 266
 267         case wxSYS_COLOUR_INFOTEXT:
 268             if (!gs_objects.m_colTooltipText.Ok()) {
 269                 GetTooltipColors();
 270             }
 271             color = gs_objects.m_colTooltipText;
 272             break;
 273
 274         case wxSYS_COLOUR_HIGHLIGHTTEXT:
 275             if (!gs_objects.m_colHighlightText.Ok())
 276             {
 277                 wxColour hclr = GetColour(wxSYS_COLOUR_HIGHLIGHT);
 278                 if (hclr.Red() > 200 && hclr.Green() > 200 && hclr.Blue() > 200)
 279                     gs_objects.m_colHighlightText = *wxBLACK;
 280                 else
 281                     gs_objects.m_colHighlightText = *wxWHITE;
 282             }
 283             color = gs_objects.m_colHighlightText;
 284             break;
 285
 286         case wxSYS_COLOUR_APPWORKSPACE:
 287             color = *wxWHITE;    // ?
 288             break;
 289
 290         case wxSYS_COLOUR_ACTIVECAPTION:
 291         case wxSYS_COLOUR_MENUHILIGHT:
 292             if (!gs_objects.m_colMenuItemHighlight.Ok())
 293             {
 294                 gdkColor.red =
 295                 gdkColor.green =
 296                 gdkColor.blue = 0;
 297                 GetColourFromGTKWidget(
 298                     gdkColor, wxGTK_MENUITEM, GTK_STATE_SELECTED, wxGTK_BG);
 299                 gs_objects.m_colMenuItemHighlight = wxColour(gdkColor);
 300             }
 301             color = gs_objects.m_colMenuItemHighlight;
 302             break;
 303
 304         case wxSYS_COLOUR_HOTLIGHT:
 305         case wxSYS_COLOUR_GRADIENTACTIVECAPTION:
 306         case wxSYS_COLOUR_GRADIENTINACTIVECAPTION:
 307             // TODO
 308             color = *wxBLACK;
 309             break;
 310
 311         case wxSYS_COLOUR_MAX:
 312         default:
 313             wxFAIL_MSG( _T("unknown system colour index") );
 314             color = *wxWHITE;
 315             break;
 316     }
 317
 318     return color;
 319 }
 320
 321 wxFont wxSystemSettingsNative::GetFont( wxSystemFont index )
 322 {
 323     wxFont font;
 324     switch (index)
 325     {
 326         case wxSYS_OEM_FIXED_FONT:
 327         case wxSYS_ANSI_FIXED_FONT:
 328         case wxSYS_SYSTEM_FIXED_FONT:
 329             font = *wxNORMAL_FONT;
 330             break;
 331
 332         case wxSYS_ANSI_VAR_FONT:
 333         case wxSYS_SYSTEM_FONT:
 334         case wxSYS_DEVICE_DEFAULT_FONT:
 335         case wxSYS_DEFAULT_GUI_FONT:
 336             if (!gs_objects.m_fontSystem.Ok())
 337             {
 338                 GtkWidget *widget = gtk_button_new();
 339                 GtkStyle *def = gtk_rc_get_style( widget );
 340                 if ( !def || !def->font_desc )
 341                     def = gtk_widget_get_default_style();
 342                 if ( def && def->font_desc )
 343                 {
 344                     wxNativeFontInfo info;
 345                     info.description =
 346                         pango_font_description_copy(def->font_desc);
 347                     gs_objects.m_fontSystem = wxFont(info);
 348                 }
 349                 else
 350                 {
 351                     GtkSettings *settings = gtk_settings_get_default();
 352                     gchar *font_name = NULL;
 353                     g_object_get ( settings,
 354                                    "gtk-font-name",
 355                                    &font_name,
 356                                    NULL);
 357                     if (!font_name)
 358                         gs_objects.m_fontSystem = wxFont( 12, wxSWISS, wxNORMAL, wxNORMAL );
 359                     else
 360                         gs_objects.m_fontSystem = wxFont(wxString::FromAscii(font_name));
 361                     g_free (font_name);
 362                 }
 363                 gtk_object_sink((GtkObject*)widget);
 364             }
 365             font = gs_objects.m_fontSystem;
 366             break;
 367
 368         default:
 369             break;
 370     }
 371     return font;
 372 }
 373
 374 static bool wxXGetWindowProperty(GdkWindow* window, Atom& type, int& format, gulong& nitems, guchar*& data)
 375 {
 376     bool success = false;
 377 #if GTK_CHECK_VERSION(2, 2, 0)
 378     if (gtk_check_version(2, 2, 0) == NULL)
 379     {
 380         gulong bytes_after;
 381         success = XGetWindowProperty(
 382             GDK_DISPLAY_XDISPLAY(gdk_drawable_get_display(window)),
 383             GDK_WINDOW_XWINDOW(window),
 384             gdk_x11_get_xatom_by_name_for_display(
 385                 gdk_drawable_get_display(window),
 386                 "_NET_FRAME_EXTENTS"),
 387             0, // left, right, top, bottom, CARDINAL[4]/32
 388             G_MAXLONG, // size of long
 389             false, // do not delete property
 390             XA_CARDINAL, // 32 bit
 391             &type, &format, &nitems, &bytes_after, &data
 392             ) == Success;
 393     }
 394 #endif
 395     return success;
 396 }
 397
 398 int wxSystemSettingsNative::GetMetric( wxSystemMetric index, wxWindow* win )
 399 {
 400     guchar *data = NULL;
 401     Atom type;
 402     int format;
 403     gulong nitems;
 404     GdkWindow *window = NULL;
 405     if(win && GTK_WIDGET_REALIZED(win->GetHandle()))
 406         window = win->GetHandle()->window;
 407
 408     switch (index)
 409     {
 410         case wxSYS_BORDER_X:
 411         case wxSYS_BORDER_Y:
 412         case wxSYS_EDGE_X:
 413         case wxSYS_EDGE_Y:
 414         case wxSYS_FRAMESIZE_X:
 415         case wxSYS_FRAMESIZE_Y:
 416             // If a window is specified/realized, and it is a toplevel window, we can query from wm.
 417             // The returned border thickness is outside the client area in that case.
 418             if (window)
 419             {
 420                 wxTopLevelWindow *tlw = wxDynamicCast(win, wxTopLevelWindow);
 421                 if (!tlw)
 422                     return -1; // not a tlw, not sure how to approach
 423                 else
 424                 {
 425                     // Check if wm supports frame extents - we can't know
 426                     // the border widths if it does not.
 427 #if GTK_CHECK_VERSION(2,2,0)
 428                     if (!gtk_check_version(2,2,0))
 429                     {
 430                         if (!gdk_x11_screen_supports_net_wm_hint(
 431                                 gdk_drawable_get_screen(window),
 432                                 gdk_atom_intern("_NET_FRAME_EXTENTS", false) ) )
 433                             return -1;
 434                     }
 435                     else
 436 #endif
 437                     {
 438                         if (!gdk_net_wm_supports(gdk_atom_intern("_NET_FRAME_EXTENTS", false)))
 439                             return -1;
 440                     }
 441
 442                     // Get the frame extents from the windowmanager.
 443                     // In most cases the top extent is the titlebar, so we use the bottom extent
 444                     // for the heights.
 445                     if (wxXGetWindowProperty(window, type, format, nitems, data))
 446                     {
 447                         int border_return = -1;
 448
 449                         if ((type == XA_CARDINAL) && (format == 32) && (nitems >= 4) && (data))
 450                         {
 451                             switch(index)
 452                             {
 453                                 case wxSYS_BORDER_X:
 454                                 case wxSYS_EDGE_X:
 455                                 case wxSYS_FRAMESIZE_X:
 456                                     border_return = int(data[1]); // width of right extent
 457                                     break;
 458                                 default:
 459                                     border_return = int(data[3]); // height of bottom extent
 460                                     break;
 461                             }
 462                         }
 463
 464                         if (data)
 465                             XFree(data);
 466
 467                         return border_return;
 468                     }
 469                 }
 470             }
 471
 472             return -1; // no window specified
 473
 474         case wxSYS_CURSOR_X:
 475         case wxSYS_CURSOR_Y:
 476 #ifdef __WXGTK24__
 477             if (!gtk_check_version(2,4,0))
 478             {
 479                 if (window)
 480                     return gdk_display_get_default_cursor_size(gdk_drawable_get_display(window));
 481                 else
 482                     return gdk_display_get_default_cursor_size(gdk_display_get_default());
 483             }
 484             else
 485 #endif
 486                 return 16;
 487
 488         case wxSYS_DCLICK_X:
 489         case wxSYS_DCLICK_Y:
 490             gint dclick_distance;
 491 #if GTK_CHECK_VERSION(2,2,0)
 492             if (window && !gtk_check_version(2,2,0))
 493                 g_object_get(gtk_settings_get_for_screen(gdk_drawable_get_screen(window)),
 494                                 "gtk-double-click-distance", &dclick_distance, NULL);
 495             else
 496 #endif
 497                 g_object_get(gtk_settings_get_default(),
 498                                 "gtk-double-click-distance", &dclick_distance, NULL);
 499
 500             return dclick_distance * 2;
 501
 502         case wxSYS_DRAG_X:
 503         case wxSYS_DRAG_Y:
 504             gint drag_threshold;
 505 #if GTK_CHECK_VERSION(2,2,0)
 506             if (window && !gtk_check_version(2,2,0))
 507             {
 508                 g_object_get(
 509                         gtk_settings_get_for_screen(gdk_drawable_get_screen(window)),
 510                         "gtk-dnd-drag-threshold",
 511                         &drag_threshold, NULL);
 512             }
 513             else
 514 #endif
 515             {
 516                 g_object_get(gtk_settings_get_default(),
 517                              "gtk-dnd-drag-threshold", &drag_threshold, NULL);
 518             }
 519
 520             // The correct thing here would be to double the value
 521             // since that is what the API wants. But the values
 522             // are much bigger under GNOME than under Windows and
 523             // just seem to much in many cases to be useful.
 524             // drag_threshold *= 2;
 525
 526             return drag_threshold;
 527
 528         // MBN: ditto for icons
 529         case wxSYS_ICON_X:     return 32;
 530         case wxSYS_ICON_Y:     return 32;
 531
 532         case wxSYS_SCREEN_X:
 533 #if GTK_CHECK_VERSION(2,2,0)
 534             if (window && !gtk_check_version(2,2,0))
 535                 return gdk_screen_get_width(gdk_drawable_get_screen(window));
 536             else
 537 #endif
 538                 return gdk_screen_width();
 539
 540         case wxSYS_SCREEN_Y:
 541 #if GTK_CHECK_VERSION(2,2,0)
 542             if (window && !gtk_check_version(2,2,0))
 543                 return gdk_screen_get_height(gdk_drawable_get_screen(window));
 544             else
 545 #endif
 546                 return gdk_screen_height();
 547
 548         case wxSYS_HSCROLL_Y:  return 15;
 549         case wxSYS_VSCROLL_X:  return 15;
 550
 551         case wxSYS_CAPTION_Y:
 552             if (!window)
 553                 // No realized window specified, and no implementation for that case yet.
 554                 return -1;
 555
 556             // Check if wm supports frame extents - we can't know the caption height if it does not.
 557 #if GTK_CHECK_VERSION(2,2,0)
 558             if (!gtk_check_version(2,2,0))
 559             {
 560                 if (!gdk_x11_screen_supports_net_wm_hint(
 561                         gdk_drawable_get_screen(window),
 562                         gdk_atom_intern("_NET_FRAME_EXTENTS", false) ) )
 563                     return -1;
 564             }
 565             else
 566 #endif
 567             {
 568                 if (!gdk_net_wm_supports(gdk_atom_intern("_NET_FRAME_EXTENTS", false)))
 569                     return -1;
 570             }
 571
 572             wxASSERT_MSG( wxDynamicCast(win, wxTopLevelWindow),
 573                           wxT("Asking for caption height of a non toplevel window") );
 574
 575             // Get the height of the top windowmanager border.
 576             // This is the titlebar in most cases. The titlebar might be elsewhere, and
 577             // we could check which is the thickest wm border to decide on which side the
 578             // titlebar is, but this might lead to interesting behaviours in used code.
 579             // Reconsider when we have a way to report to the user on which side it is.
 580             if (wxXGetWindowProperty(window, type, format, nitems, data))
 581             {
 582                 int caption_height = -1;
 583
 584                 if ((type == XA_CARDINAL) && (format == 32) && (nitems >= 3) && (data))
 585                 {
 586                     caption_height = int(data[2]); // top frame extent
 587                 }
 588
 589                 if (data)
 590                     XFree(data);
 591
 592                 return caption_height;
 593             }
 594
 595             // Try a default approach without a window pointer, if possible
 596             // ...
 597
 598             return -1;
 599
 600         case wxSYS_PENWINDOWS_PRESENT:
 601             // No MS Windows for Pen computing extension available in X11 based gtk+.
 602             return 0;
 603
 604         default:
 605             return -1;   // metric is unknown
 606     }
 607 }
 608
 609 bool wxSystemSettingsNative::HasFeature(wxSystemFeature index)
 610 {
 611     switch (index)
 612     {
 613         case wxSYS_CAN_ICONIZE_FRAME:
 614             return false;
 615
 616         case wxSYS_CAN_DRAW_FRAME_DECORATIONS:
 617             return true;
 618
 619         default:
 620             return false;
 621     }
 622 }