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