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