src/gtk/settings.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        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 #include "wx/debug.h"
  16 #include "wx/cmndata.h"
  17 #include "wx/fontutil.h"
  18 #include "wx/toplevel.h"
  19
  20 // Using gtk_list_new, which is deprecated since GTK2
  21 // Using gtk_object_sink, which is deprecated since GTK+-2.9.0
  22 #ifdef GTK_DISABLE_DEPRECATED
  23 #undef GTK_DISABLE_DEPRECATED
  24 #endif
  25
  26 #include <gdk/gdk.h>
  27 #include <gdk/gdkx.h>
  28 #include <gdk/gdkprivate.h>
  29 #include <gtk/gtk.h>
  30
  31 #include <X11/Xatom.h>
  32
  33 #define SHIFT (8*(sizeof(short int)-sizeof(char)))
  34
  35 // ----------------------------------------------------------------------------
  36 // wxSystemObjects
  37 // ----------------------------------------------------------------------------
  38
  39 struct wxSystemObjects
  40 {
  41     wxColour m_colBtnFace,
  42              m_colBtnShadow,
  43              m_colBtnHighlight,
  44              m_colHighlight,
  45              m_colHighlightText,
  46              m_colListBox,
  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 // ----------------------------------------------------------------------------
  58 // wxSystemSettings implementation
  59 // ----------------------------------------------------------------------------
  60
  61 // kind of widget to use in GetColourFromGTKWidget
  62 enum wxGtkWidgetType
  63 {
  64     wxGTK_BUTTON,
  65     wxGTK_LIST,
  66     wxGTK_MENUITEM
  67 };
  68
  69 // the colour we need
  70 enum wxGtkColourType
  71 {
  72     wxGTK_FG,
  73     wxGTK_BG,
  74     wxGTK_BASE
  75 };
  76
  77 // wxSystemSettings::GetColour() helper: get the colours from a GTK+
  78 // widget style, return true if we did get them, false to use defaults
  79 static bool GetColourFromGTKWidget(int& red, int& green, int& blue,
  80                                    wxGtkWidgetType type = wxGTK_BUTTON,
  81                                    GtkStateType state = GTK_STATE_NORMAL,
  82                                    wxGtkColourType colour = wxGTK_BG)
  83 {
  84     GtkWidget *widget;
  85     switch ( type )
  86     {
  87         default:
  88             wxFAIL_MSG( _T("unexpected GTK widget type") );
  89             // fall through
  90
  91         case wxGTK_BUTTON:
  92             widget = gtk_button_new();
  93             break;
  94
  95         case wxGTK_LIST:
  96             widget = gtk_list_new();
  97             break;
  98
  99         case wxGTK_MENUITEM:
 100             widget = gtk_menu_item_new();
 101     }
 102
 103     GtkStyle *def = gtk_rc_get_style( widget );
 104     if ( !def )
 105         def = gtk_widget_get_default_style();
 106
 107     bool ok;
 108     if ( def )
 109     {
 110         GdkColor *col;
 111         switch ( colour )
 112         {
 113             default:
 114                 wxFAIL_MSG( _T("unexpected GTK colour type") );
 115                 // fall through
 116
 117             case wxGTK_FG:
 118                 col = def->fg;
 119                 break;
 120
 121             case wxGTK_BG:
 122                 col = def->bg;
 123                 break;
 124
 125             case wxGTK_BASE:
 126                 col = def->base;
 127                 break;
 128         }
 129
 130         red = col[state].red;
 131         green = col[state].green;
 132         blue = col[state].blue;
 133
 134         ok = TRUE;
 135     }
 136     else
 137     {
 138         ok = FALSE;
 139     }
 140
 141     gtk_widget_destroy( widget );
 142
 143     return ok;
 144 }
 145
 146 static void GetTooltipColors()
 147 {
 148     GtkTooltips* tooltips = gtk_tooltips_new();
 149     gtk_tooltips_force_window(tooltips);
 150     gtk_widget_ensure_style(tooltips->tip_window);
 151     GdkColor c = tooltips->tip_window->style->bg[GTK_STATE_NORMAL];
 152     gs_objects.m_colTooltip = wxColor(c.red >> SHIFT, c.green >> SHIFT, c.blue >> SHIFT);
 153     c = tooltips->tip_window->style->fg[GTK_STATE_NORMAL];
 154     gs_objects.m_colTooltipText = wxColor(c.red >> SHIFT, c.green >> SHIFT, c.blue >> SHIFT);
 155     gtk_object_sink(wx_reinterpret_cast(GtkObject*, tooltips));
 156 }
 157
 158 wxColour wxSystemSettingsNative::GetColour( wxSystemColour index )
 159 {
 160     switch (index)
 161     {
 162         case wxSYS_COLOUR_SCROLLBAR:
 163         case wxSYS_COLOUR_BACKGROUND:
 164         case wxSYS_COLOUR_INACTIVECAPTION:
 165         case wxSYS_COLOUR_MENU:
 166         case wxSYS_COLOUR_WINDOWFRAME:
 167         case wxSYS_COLOUR_ACTIVEBORDER:
 168         case wxSYS_COLOUR_INACTIVEBORDER:
 169         case wxSYS_COLOUR_BTNFACE:
 170         case wxSYS_COLOUR_MENUBAR:
 171         case wxSYS_COLOUR_3DLIGHT:
 172             if (!gs_objects.m_colBtnFace.Ok())
 173             {
 174                 int red, green, blue;
 175                 if ( !GetColourFromGTKWidget(red, green, blue) )
 176                 {
 177                     red =
 178                     green = 0;
 179                     blue = 0x9c40;
 180                 }
 181
 182                 gs_objects.m_colBtnFace = wxColour( red   >> SHIFT,
 183                                                    green >> SHIFT,
 184                                                    blue  >> SHIFT );
 185             }
 186             return gs_objects.m_colBtnFace;
 187
 188         case wxSYS_COLOUR_WINDOW:
 189             return *wxWHITE;
 190
 191         case wxSYS_COLOUR_3DDKSHADOW:
 192             return *wxBLACK;
 193
 194         case wxSYS_COLOUR_GRAYTEXT:
 195         case wxSYS_COLOUR_BTNSHADOW:
 196         //case wxSYS_COLOUR_3DSHADOW:
 197             if (!gs_objects.m_colBtnShadow.Ok())
 198             {
 199                 wxColour faceColour(GetColour(wxSYS_COLOUR_3DFACE));
 200                 gs_objects.m_colBtnShadow =
 201                    wxColour((unsigned char) (faceColour.Red() * 0.666),
 202                             (unsigned char) (faceColour.Green() * 0.666),
 203                             (unsigned char) (faceColour.Blue() * 0.666));
 204             }
 205
 206             return gs_objects.m_colBtnShadow;
 207
 208         case wxSYS_COLOUR_3DHIGHLIGHT:
 209         //case wxSYS_COLOUR_BTNHIGHLIGHT:
 210             return * wxWHITE;
 211
 212         case wxSYS_COLOUR_HIGHLIGHT:
 213             if (!gs_objects.m_colHighlight.Ok())
 214             {
 215                 int red, green, blue;
 216                 if ( !GetColourFromGTKWidget(red, green, blue,
 217                                              wxGTK_BUTTON,
 218                                              GTK_STATE_SELECTED) )
 219                 {
 220                     red =
 221                     green = 0;
 222                     blue = 0x9c40;
 223                 }
 224
 225                 gs_objects.m_colHighlight = wxColour( red   >> SHIFT,
 226                                                         green >> SHIFT,
 227                                                         blue  >> SHIFT );
 228             }
 229             return gs_objects.m_colHighlight;
 230
 231         case wxSYS_COLOUR_LISTBOX:
 232             if (!gs_objects.m_colListBox.Ok())
 233             {
 234                 int red, green, blue;
 235                 if ( GetColourFromGTKWidget(red, green, blue,
 236                                             wxGTK_LIST,
 237                                             GTK_STATE_NORMAL,
 238                                             wxGTK_BASE) )
 239                 {
 240                     gs_objects.m_colListBox = wxColour( red   >> SHIFT,
 241                                                           green >> SHIFT,
 242                                                           blue  >> SHIFT );
 243                 }
 244                 else
 245                 {
 246                     gs_objects.m_colListBox = wxColour(*wxWHITE);
 247                 }
 248             }
 249             return gs_objects.m_colListBox;
 250
 251         case wxSYS_COLOUR_MENUTEXT:
 252         case wxSYS_COLOUR_WINDOWTEXT:
 253         case wxSYS_COLOUR_CAPTIONTEXT:
 254         case wxSYS_COLOUR_INACTIVECAPTIONTEXT:
 255         case wxSYS_COLOUR_BTNTEXT:
 256             if (!gs_objects.m_colBtnText.Ok())
 257             {
 258                 int red, green, blue;
 259                 if ( !GetColourFromGTKWidget(red, green, blue,
 260                                              wxGTK_BUTTON,
 261                                              GTK_STATE_NORMAL,
 262                                              wxGTK_FG) )
 263                 {
 264                     red =
 265                     green =
 266                     blue = 0;
 267                 }
 268
 269                 gs_objects.m_colBtnText = wxColour( red   >> SHIFT,
 270                                                       green >> SHIFT,
 271                                                       blue  >> SHIFT );
 272             }
 273             return gs_objects.m_colBtnText;
 274
 275         case wxSYS_COLOUR_INFOBK:
 276             if (!gs_objects.m_colTooltip.Ok()) {
 277                 GetTooltipColors();
 278             }
 279             return gs_objects.m_colTooltip;
 280
 281         case wxSYS_COLOUR_INFOTEXT:
 282             if (!gs_objects.m_colTooltipText.Ok()) {
 283                 GetTooltipColors();
 284             }
 285             return gs_objects.m_colTooltipText;
 286
 287         case wxSYS_COLOUR_HIGHLIGHTTEXT:
 288             if (!gs_objects.m_colHighlightText.Ok())
 289             {
 290                 wxColour hclr = GetColour(wxSYS_COLOUR_HIGHLIGHT);
 291                 if (hclr.Red() > 200 && hclr.Green() > 200 && hclr.Blue() > 200)
 292                     gs_objects.m_colHighlightText = wxColour(*wxBLACK);
 293                 else
 294                     gs_objects.m_colHighlightText = wxColour(*wxWHITE);
 295             }
 296             return gs_objects.m_colHighlightText;
 297
 298         case wxSYS_COLOUR_APPWORKSPACE:
 299             return *wxWHITE;    // ?
 300
 301         case wxSYS_COLOUR_ACTIVECAPTION:
 302         case wxSYS_COLOUR_MENUHILIGHT:
 303             if (!gs_objects.m_colMenuItemHighlight.Ok())
 304             {
 305                 int red, green, blue;
 306                 if ( !GetColourFromGTKWidget(red, green, blue,
 307                                              wxGTK_MENUITEM,
 308                                              GTK_STATE_SELECTED,
 309                                              wxGTK_BG) )
 310                 {
 311                     red =
 312                     green =
 313                     blue = 0;
 314                 }
 315
 316                 gs_objects.m_colMenuItemHighlight = wxColour( red  >> SHIFT,
 317                                                               green >> SHIFT,
 318                                                               blue  >> SHIFT );
 319             }
 320             return gs_objects.m_colMenuItemHighlight;
 321
 322         case wxSYS_COLOUR_HOTLIGHT:
 323         case wxSYS_COLOUR_GRADIENTACTIVECAPTION:
 324         case wxSYS_COLOUR_GRADIENTINACTIVECAPTION:
 325             // TODO
 326             return *wxBLACK;
 327
 328         case wxSYS_COLOUR_MAX:
 329         default:
 330             wxFAIL_MSG( _T("unknown system colour index") );
 331     }
 332
 333     return *wxWHITE;
 334 }
 335
 336 wxFont wxSystemSettingsNative::GetFont( wxSystemFont index )
 337 {
 338     switch (index)
 339     {
 340         case wxSYS_OEM_FIXED_FONT:
 341         case wxSYS_ANSI_FIXED_FONT:
 342         case wxSYS_SYSTEM_FIXED_FONT:
 343         {
 344             return *wxNORMAL_FONT;
 345         }
 346         case wxSYS_ANSI_VAR_FONT:
 347         case wxSYS_SYSTEM_FONT:
 348         case wxSYS_DEVICE_DEFAULT_FONT:
 349         case wxSYS_DEFAULT_GUI_FONT:
 350         {
 351             if (!gs_objects.m_fontSystem.Ok())
 352             {
 353                 GtkWidget *widget = gtk_button_new();
 354                 GtkStyle *def = gtk_rc_get_style( widget );
 355                 if ( !def || !def->font_desc )
 356                     def = gtk_widget_get_default_style();
 357                 if ( def && def->font_desc )
 358                 {
 359                     wxNativeFontInfo info;
 360                     info.description =
 361                         pango_font_description_copy(def->font_desc);
 362                     gs_objects.m_fontSystem = wxFont(info);
 363                 }
 364                 else
 365                 {
 366                     GtkSettings *settings = gtk_settings_get_default();
 367                     gchar *font_name = NULL;
 368                     g_object_get ( settings,
 369                                    "gtk-font-name",
 370                                    &font_name,
 371                                    NULL);
 372                     if (!font_name)
 373                         gs_objects.m_fontSystem = wxFont( 12, wxSWISS, wxNORMAL, wxNORMAL );
 374                     else
 375                         gs_objects.m_fontSystem = wxFont(wxString::FromAscii(font_name));
 376                     g_free (font_name);
 377                 }
 378                 gtk_widget_destroy( widget );
 379             }
 380             return gs_objects.m_fontSystem;
 381         }
 382
 383         default:
 384             return wxNullFont;
 385     }
 386 }
 387
 388 int wxSystemSettingsNative::GetMetric( wxSystemMetric index, wxWindow* win )
 389 {
 390     bool success = false;
 391
 392     guchar *data = NULL;
 393     GdkWindow *window = NULL;
 394     if(win && GTK_WIDGET_REALIZED(win->GetHandle()))
 395         window = win->GetHandle()->window;
 396
 397     switch (index)
 398     {
 399         case wxSYS_BORDER_X:
 400         case wxSYS_BORDER_Y:
 401         case wxSYS_EDGE_X:
 402         case wxSYS_EDGE_Y:
 403         case wxSYS_FRAMESIZE_X:
 404         case wxSYS_FRAMESIZE_Y:
 405             // If a window is specified/realized, and it is a toplevel window, we can query from wm.
 406             // The returned border thickness is outside the client area in that case.
 407             if (window)
 408             {
 409                 wxTopLevelWindow *tlw = wxDynamicCast(win, wxTopLevelWindow);
 410                 if (!tlw)
 411                     return -1; // not a tlw, not sure how to approach
 412                 else
 413                 {
 414                     // Check if wm supports frame extents - we can't know
 415                     // the border widths if it does not.
 416 #if GTK_CHECK_VERSION(2,2,0)
 417                     if (!gtk_check_version(2,2,0))
 418                     {
 419                         if (!gdk_x11_screen_supports_net_wm_hint(
 420                                 gdk_drawable_get_screen(window),
 421                                 gdk_atom_intern("_NET_FRAME_EXTENTS", false) ) )
 422                             return -1;
 423                     }
 424                     else
 425 #endif
 426                     {
 427                         if (!gdk_net_wm_supports(gdk_atom_intern("_NET_FRAME_EXTENTS", false)))
 428                             return -1;
 429                     }
 430
 431                     // Get the frame extents from the windowmanager.
 432                     // In most cases the top extent is the titlebar, so we use the bottom extent
 433                     // for the heights.
 434
 435                     Atom type;
 436                     gint format;
 437                     gulong nitems;
 438
 439 #if GTK_CHECK_VERSION(2,2,0)
 440                     if (!gtk_check_version(2,2,0))
 441                     {
 442                         gulong bytes_after;
 443                         success = (XGetWindowProperty (GDK_DISPLAY_XDISPLAY(gdk_drawable_get_display(window)),
 444                                             GDK_WINDOW_XWINDOW(window),
 445                                             gdk_x11_get_xatom_by_name_for_display (
 446                                                     gdk_drawable_get_display(window),
 447                                                     "_NET_FRAME_EXTENTS" ),
 448                                             0, // left, right, top, bottom, CARDINAL[4]/32
 449                                             G_MAXLONG, // size of long
 450                                             false, // do not delete property
 451                                             XA_CARDINAL, // 32 bit
 452                                             &type, &format, &nitems, &bytes_after, &data
 453                                            ) == Success);
 454                     }
 455 #endif
 456                     if (success)
 457                     {
 458                         int border_return = -1;
 459
 460                         if ((type == XA_CARDINAL) && (format == 32) && (nitems >= 4) && (data))
 461                         {
 462                             long *borders;
 463                             borders = (long*)data;
 464                             switch(index)
 465                             {
 466                                 case wxSYS_BORDER_X:
 467                                 case wxSYS_EDGE_X:
 468                                 case wxSYS_FRAMESIZE_X:
 469                                     border_return = borders[1]; // width of right extent
 470                                     break;
 471                                 default:
 472                                     border_return = borders[3]; // height of bottom extent
 473                                     break;
 474                             }
 475                         }
 476
 477                         if (data)
 478                             XFree(data);
 479
 480                         return border_return;
 481                     }
 482                 }
 483             }
 484
 485             return -1; // no window specified
 486
 487         case wxSYS_CURSOR_X:
 488         case wxSYS_CURSOR_Y:
 489 #ifdef __WXGTK24__
 490             if (!gtk_check_version(2,4,0))
 491             {
 492                 if (window)
 493                     return gdk_display_get_default_cursor_size(gdk_drawable_get_display(window));
 494                 else
 495                     return gdk_display_get_default_cursor_size(gdk_display_get_default());
 496             }
 497             else
 498 #endif
 499                 return 16;
 500
 501         case wxSYS_DCLICK_X:
 502         case wxSYS_DCLICK_Y:
 503             gint dclick_distance;
 504 #if GTK_CHECK_VERSION(2,2,0)
 505             if (window && !gtk_check_version(2,2,0))
 506                 g_object_get(gtk_settings_get_for_screen(gdk_drawable_get_screen(window)),
 507                                 "gtk-double-click-distance", &dclick_distance, NULL);
 508             else
 509 #endif
 510                 g_object_get(gtk_settings_get_default(),
 511                                 "gtk-double-click-distance", &dclick_distance, NULL);
 512
 513             return dclick_distance * 2;
 514
 515         case wxSYS_DRAG_X:
 516         case wxSYS_DRAG_Y:
 517             gint drag_threshold;
 518 #if GTK_CHECK_VERSION(2,2,0)
 519             if (window && !gtk_check_version(2,2,0))
 520             {
 521                 g_object_get(
 522                         gtk_settings_get_for_screen(gdk_drawable_get_screen(window)),
 523                         "gtk-dnd-drag-threshold",
 524                         &drag_threshold, NULL);
 525             }
 526             else
 527 #endif
 528             {
 529                 g_object_get(gtk_settings_get_default(),
 530                              "gtk-dnd-drag-threshold", &drag_threshold, NULL);
 531             }
 532
 533             return drag_threshold * 2;
 534
 535         // MBN: ditto for icons
 536         case wxSYS_ICON_X:     return 32;
 537         case wxSYS_ICON_Y:     return 32;
 538
 539         case wxSYS_SCREEN_X:
 540 #if GTK_CHECK_VERSION(2,2,0)
 541             if (window && !gtk_check_version(2,2,0))
 542                 return gdk_screen_get_width(gdk_drawable_get_screen(window));
 543             else
 544 #endif
 545                 return gdk_screen_width();
 546
 547         case wxSYS_SCREEN_Y:
 548 #if GTK_CHECK_VERSION(2,2,0)
 549             if (window && !gtk_check_version(2,2,0))
 550                 return gdk_screen_get_height(gdk_drawable_get_screen(window));
 551             else
 552 #endif
 553                 return gdk_screen_height();
 554
 555         case wxSYS_HSCROLL_Y:  return 15;
 556         case wxSYS_VSCROLL_X:  return 15;
 557
 558         case wxSYS_CAPTION_Y:
 559             if (!window)
 560                 // No realized window specified, and no implementation for that case yet.
 561                 return -1;
 562
 563             // Check if wm supports frame extents - we can't know the caption height if it does not.
 564 #if GTK_CHECK_VERSION(2,2,0)
 565             if (!gtk_check_version(2,2,0))
 566             {
 567                 if (!gdk_x11_screen_supports_net_wm_hint(
 568                         gdk_drawable_get_screen(window),
 569                         gdk_atom_intern("_NET_FRAME_EXTENTS", false) ) )
 570                     return -1;
 571             }
 572             else
 573 #endif
 574             {
 575                 if (!gdk_net_wm_supports(gdk_atom_intern("_NET_FRAME_EXTENTS", false)))
 576                     return -1;
 577             }
 578
 579             wxASSERT_MSG( wxDynamicCast(win, wxTopLevelWindow),
 580                           wxT("Asking for caption height of a non toplevel window") );
 581
 582             // Get the height of the top windowmanager border.
 583             // This is the titlebar in most cases. The titlebar might be elsewhere, and
 584             // we could check which is the thickest wm border to decide on which side the
 585             // titlebar is, but this might lead to interesting behaviours in used code.
 586             // Reconsider when we have a way to report to the user on which side it is.
 587
 588             Atom type;
 589             gint format;
 590             gulong nitems;
 591
 592 #if GTK_CHECK_VERSION(2,2,0)
 593             if (!gtk_check_version(2,2,0))
 594             {
 595                 gulong bytes_after;
 596                 success = (XGetWindowProperty (GDK_DISPLAY_XDISPLAY(gdk_drawable_get_display(window)),
 597                                     GDK_WINDOW_XWINDOW(window),
 598                                     gdk_x11_get_xatom_by_name_for_display (
 599                                             gdk_drawable_get_display(window),
 600                                             "_NET_FRAME_EXTENTS" ),
 601                                     0, // left, right, top, bottom, CARDINAL[4]/32
 602                                     G_MAXLONG, // size of long
 603                                     false, // do not delete property
 604                                     XA_CARDINAL, // 32 bit
 605                                     &type, &format, &nitems, &bytes_after, &data
 606                                    ) == Success);
 607             }
 608 #endif
 609             if (success)
 610             {
 611                 int caption_height = -1;
 612
 613                 if ((type == XA_CARDINAL) && (format == 32) && (nitems >= 3) && (data))
 614                 {
 615                     long *borders;
 616                     borders = (long*)data;
 617                     caption_height = borders[2]; // top frame extent
 618                 }
 619
 620                 if (data)
 621                     XFree(data);
 622
 623                 return caption_height;
 624             }
 625
 626             // Try a default approach without a window pointer, if possible
 627             // ...
 628
 629             return -1;
 630
 631         case wxSYS_PENWINDOWS_PRESENT:
 632             // No MS Windows for Pen computing extension available in X11 based gtk+.
 633             return 0;
 634
 635         default:
 636             return -1;   // metric is unknown
 637     }
 638 }
 639
 640 bool wxSystemSettingsNative::HasFeature(wxSystemFeature index)
 641 {
 642     switch (index)
 643     {
 644         case wxSYS_CAN_ICONIZE_FRAME:
 645             return FALSE;
 646
 647         case wxSYS_CAN_DRAW_FRAME_DECORATIONS:
 648             return TRUE;
 649
 650         default:
 651             return FALSE;
 652     }
 653 }