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