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