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 #include <gdk/gdk.h>
  21 #include <gdk/gdkx.h>
  22 #include <gdk/gdkprivate.h>
  23 #include <gtk/gtk.h>
  24
  25 #include <X11/Xatom.h>
  26
  27 #define SHIFT (8*(sizeof(short int)-sizeof(char)))
  28
  29 // ----------------------------------------------------------------------------
  30 // wxSystemObjects
  31 // ----------------------------------------------------------------------------
  32
  33 struct wxSystemObjects
  34 {
  35     wxColour m_colBtnFace,
  36              m_colBtnShadow,
  37              m_colBtnHighlight,
  38              m_colHighlight,
  39              m_colHighlightText,
  40              m_colListBox,
  41              m_colBtnText,
  42              m_colMenuItemHighlight,
  43              m_colTooltip,
  44              m_colTooltipText;
  45
  46     wxFont m_fontSystem;
  47 };
  48
  49 static wxSystemObjects gs_objects;
  50
  51 // ----------------------------------------------------------------------------
  52 // wxSystemSettings implementation
  53 // ----------------------------------------------------------------------------
  54
  55 // kind of widget to use in GetColourFromGTKWidget
  56 enum wxGtkWidgetType
  57 {
  58     wxGTK_BUTTON,
  59     wxGTK_LIST,
  60     wxGTK_MENUITEM
  61 };
  62
  63 // the colour we need
  64 enum wxGtkColourType
  65 {
  66     wxGTK_FG,
  67     wxGTK_BG,
  68     wxGTK_BASE
  69 };
  70
  71 // wxSystemSettings::GetColour() helper: get the colours from a GTK+
  72 // widget style, return true if we did get them, false to use defaults
  73 static bool GetColourFromGTKWidget(int& red, int& green, int& blue,
  74                                    wxGtkWidgetType type = wxGTK_BUTTON,
  75                                    GtkStateType state = GTK_STATE_NORMAL,
  76                                    wxGtkColourType colour = wxGTK_BG)
  77 {
  78     GtkWidget *widget;
  79     switch ( type )
  80     {
  81         default:
  82             wxFAIL_MSG( _T("unexpected GTK widget type") );
  83             // fall through
  84
  85         case wxGTK_BUTTON:
  86             widget = gtk_button_new();
  87             break;
  88
  89         case wxGTK_LIST:
  90             widget = gtk_list_new();
  91             break;
  92
  93         case wxGTK_MENUITEM:
  94             widget = gtk_menu_item_new();
  95     }
  96
  97     GtkStyle *def = gtk_rc_get_style( widget );
  98     if ( !def )
  99         def = gtk_widget_get_default_style();
 100
 101     bool ok;
 102     if ( def )
 103     {
 104         GdkColor *col;
 105         switch ( colour )
 106         {
 107             default:
 108                 wxFAIL_MSG( _T("unexpected GTK colour type") );
 109                 // fall through
 110
 111             case wxGTK_FG:
 112                 col = def->fg;
 113                 break;
 114
 115             case wxGTK_BG:
 116                 col = def->bg;
 117                 break;
 118
 119             case wxGTK_BASE:
 120                 col = def->base;
 121                 break;
 122         }
 123
 124         red = col[state].red;
 125         green = col[state].green;
 126         blue = col[state].blue;
 127
 128         ok = TRUE;
 129     }
 130     else
 131     {
 132         ok = FALSE;
 133     }
 134
 135     gtk_widget_destroy( widget );
 136
 137     return ok;
 138 }
 139
 140 static void GetTooltipColors()
 141 {
 142     GtkTooltips* tooltips = gtk_tooltips_new();
 143     gtk_tooltips_force_window(tooltips);
 144     gtk_widget_ensure_style(tooltips->tip_window);
 145     GdkColor c = tooltips->tip_window->style->bg[GTK_STATE_NORMAL];
 146     gs_objects.m_colTooltip = wxColor(c.red >> SHIFT, c.green >> SHIFT, c.blue >> SHIFT);
 147     c = tooltips->tip_window->style->fg[GTK_STATE_NORMAL];
 148     gs_objects.m_colTooltipText = wxColor(c.red >> SHIFT, c.green >> SHIFT, c.blue >> SHIFT);
 149     gtk_object_sink(wx_reinterpret_cast(GtkObject*, tooltips));
 150 }
 151
 152 wxColour wxSystemSettingsNative::GetColour( wxSystemColour index )
 153 {
 154     switch (index)
 155     {
 156         case wxSYS_COLOUR_SCROLLBAR:
 157         case wxSYS_COLOUR_BACKGROUND:
 158         case wxSYS_COLOUR_INACTIVECAPTION:
 159         case wxSYS_COLOUR_MENU:
 160         case wxSYS_COLOUR_WINDOWFRAME:
 161         case wxSYS_COLOUR_ACTIVEBORDER:
 162         case wxSYS_COLOUR_INACTIVEBORDER:
 163         case wxSYS_COLOUR_BTNFACE:
 164         case wxSYS_COLOUR_MENUBAR:
 165         case wxSYS_COLOUR_3DLIGHT:
 166             if (!gs_objects.m_colBtnFace.Ok())
 167             {
 168                 int red, green, blue;
 169                 if ( !GetColourFromGTKWidget(red, green, blue) )
 170                 {
 171                     red =
 172                     green = 0;
 173                     blue = 0x9c40;
 174                 }
 175
 176                 gs_objects.m_colBtnFace = wxColour( red   >> SHIFT,
 177                                                    green >> SHIFT,
 178                                                    blue  >> SHIFT );
 179             }
 180             return gs_objects.m_colBtnFace;
 181
 182         case wxSYS_COLOUR_WINDOW:
 183             return *wxWHITE;
 184
 185         case wxSYS_COLOUR_3DDKSHADOW:
 186             return *wxBLACK;
 187
 188         case wxSYS_COLOUR_GRAYTEXT:
 189         case wxSYS_COLOUR_BTNSHADOW:
 190         //case wxSYS_COLOUR_3DSHADOW:
 191             if (!gs_objects.m_colBtnShadow.Ok())
 192             {
 193                 wxColour faceColour(GetColour(wxSYS_COLOUR_3DFACE));
 194                 gs_objects.m_colBtnShadow =
 195                    wxColour((unsigned char) (faceColour.Red() * 0.666),
 196                             (unsigned char) (faceColour.Green() * 0.666),
 197                             (unsigned char) (faceColour.Blue() * 0.666));
 198             }
 199
 200             return gs_objects.m_colBtnShadow;
 201
 202         case wxSYS_COLOUR_3DHIGHLIGHT:
 203         //case wxSYS_COLOUR_BTNHIGHLIGHT:
 204             return * wxWHITE;
 205
 206         case wxSYS_COLOUR_HIGHLIGHT:
 207             if (!gs_objects.m_colHighlight.Ok())
 208             {
 209                 int red, green, blue;
 210                 if ( !GetColourFromGTKWidget(red, green, blue,
 211                                              wxGTK_BUTTON,
 212                                              GTK_STATE_SELECTED) )
 213                 {
 214                     red =
 215                     green = 0;
 216                     blue = 0x9c40;
 217                 }
 218
 219                 gs_objects.m_colHighlight = wxColour( red   >> SHIFT,
 220                                                         green >> SHIFT,
 221                                                         blue  >> SHIFT );
 222             }
 223             return gs_objects.m_colHighlight;
 224
 225         case wxSYS_COLOUR_LISTBOX:
 226             if (!gs_objects.m_colListBox.Ok())
 227             {
 228                 int red, green, blue;
 229                 if ( GetColourFromGTKWidget(red, green, blue,
 230                                             wxGTK_LIST,
 231                                             GTK_STATE_NORMAL,
 232                                             wxGTK_BASE) )
 233                 {
 234                     gs_objects.m_colListBox = wxColour( red   >> SHIFT,
 235                                                           green >> SHIFT,
 236                                                           blue  >> SHIFT );
 237                 }
 238                 else
 239                 {
 240                     gs_objects.m_colListBox = wxColour(*wxWHITE);
 241                 }
 242             }
 243             return gs_objects.m_colListBox;
 244
 245         case wxSYS_COLOUR_MENUTEXT:
 246         case wxSYS_COLOUR_WINDOWTEXT:
 247         case wxSYS_COLOUR_CAPTIONTEXT:
 248         case wxSYS_COLOUR_INACTIVECAPTIONTEXT:
 249         case wxSYS_COLOUR_BTNTEXT:
 250             if (!gs_objects.m_colBtnText.Ok())
 251             {
 252                 int red, green, blue;
 253                 if ( !GetColourFromGTKWidget(red, green, blue,
 254                                              wxGTK_BUTTON,
 255                                              GTK_STATE_NORMAL,
 256                                              wxGTK_FG) )
 257                 {
 258                     red =
 259                     green =
 260                     blue = 0;
 261                 }
 262
 263                 gs_objects.m_colBtnText = wxColour( red   >> SHIFT,
 264                                                       green >> SHIFT,
 265                                                       blue  >> SHIFT );
 266             }
 267             return gs_objects.m_colBtnText;
 268
 269         case wxSYS_COLOUR_INFOBK:
 270             if (!gs_objects.m_colTooltip.Ok()) {
 271                 GetTooltipColors();
 272             }
 273             return gs_objects.m_colTooltip;
 274
 275         case wxSYS_COLOUR_INFOTEXT:
 276             if (!gs_objects.m_colTooltipText.Ok()) {
 277                 GetTooltipColors();
 278             }
 279             return gs_objects.m_colTooltipText;
 280
 281         case wxSYS_COLOUR_HIGHLIGHTTEXT:
 282             if (!gs_objects.m_colHighlightText.Ok())
 283             {
 284                 wxColour hclr = GetColour(wxSYS_COLOUR_HIGHLIGHT);
 285                 if (hclr.Red() > 200 && hclr.Green() > 200 && hclr.Blue() > 200)
 286                     gs_objects.m_colHighlightText = wxColour(*wxBLACK);
 287                 else
 288                     gs_objects.m_colHighlightText = wxColour(*wxWHITE);
 289             }
 290             return gs_objects.m_colHighlightText;
 291
 292         case wxSYS_COLOUR_APPWORKSPACE:
 293             return *wxWHITE;    // ?
 294
 295         case wxSYS_COLOUR_ACTIVECAPTION:
 296         case wxSYS_COLOUR_MENUHILIGHT:
 297             if (!gs_objects.m_colMenuItemHighlight.Ok())
 298             {
 299                 int red, green, blue;
 300                 if ( !GetColourFromGTKWidget(red, green, blue,
 301                                              wxGTK_MENUITEM,
 302                                              GTK_STATE_SELECTED,
 303                                              wxGTK_BG) )
 304                 {
 305                     red =
 306                     green =
 307                     blue = 0;
 308                 }
 309
 310                 gs_objects.m_colMenuItemHighlight = wxColour( red  >> SHIFT,
 311                                                               green >> SHIFT,
 312                                                               blue  >> SHIFT );
 313             }
 314             return gs_objects.m_colMenuItemHighlight;
 315
 316         case wxSYS_COLOUR_HOTLIGHT:
 317         case wxSYS_COLOUR_GRADIENTACTIVECAPTION:
 318         case wxSYS_COLOUR_GRADIENTINACTIVECAPTION:
 319             // TODO
 320             return *wxBLACK;
 321
 322         case wxSYS_COLOUR_MAX:
 323         default:
 324             wxFAIL_MSG( _T("unknown system colour index") );
 325     }
 326
 327     return *wxWHITE;
 328 }
 329
 330 wxFont wxSystemSettingsNative::GetFont( wxSystemFont index )
 331 {
 332     switch (index)
 333     {
 334         case wxSYS_OEM_FIXED_FONT:
 335         case wxSYS_ANSI_FIXED_FONT:
 336         case wxSYS_SYSTEM_FIXED_FONT:
 337         {
 338             return *wxNORMAL_FONT;
 339         }
 340         case wxSYS_ANSI_VAR_FONT:
 341         case wxSYS_SYSTEM_FONT:
 342         case wxSYS_DEVICE_DEFAULT_FONT:
 343         case wxSYS_DEFAULT_GUI_FONT:
 344         {
 345             if (!gs_objects.m_fontSystem.Ok())
 346             {
 347 #ifdef __WXGTK20__
 348                 GtkWidget *widget = gtk_button_new();
 349                 GtkStyle *def = gtk_rc_get_style( widget );
 350                 if ( !def || !def->font_desc )
 351                     def = gtk_widget_get_default_style();
 352                 if ( def && def->font_desc )
 353                 {
 354                     wxNativeFontInfo info;
 355                     info.description =
 356                         pango_font_description_copy(def->font_desc);
 357                     gs_objects.m_fontSystem = wxFont(info);
 358                 }
 359                 else
 360                 {
 361                     GtkSettings *settings = gtk_settings_get_default();
 362                     gchar *font_name = NULL;
 363                     g_object_get ( settings,
 364                                    "gtk-font-name",
 365                                    &font_name,
 366                                    NULL);
 367                     if (!font_name)
 368                         gs_objects.m_fontSystem = wxFont( 12, wxSWISS, wxNORMAL, wxNORMAL );
 369                     else
 370                         gs_objects.m_fontSystem = wxFont(wxString::FromAscii(font_name));
 371                     g_free (font_name);
 372                 }
 373                 gtk_widget_destroy( widget );
 374 #else
 375                 gs_objects.m_fontSystem = wxFont( 12, wxSWISS, wxNORMAL, wxNORMAL );
 376 #endif
 377             }
 378             return gs_objects.m_fontSystem;
 379         }
 380
 381         default:
 382             return wxNullFont;
 383     }
 384 }
 385
 386 int wxSystemSettingsNative::GetMetric( wxSystemMetric index, wxWindow* win )
 387 {
 388 #ifdef __WXGTK20__
 389     bool success = false;
 390
 391     guchar *data = NULL;
 392     GdkWindow *window = NULL;
 393     if(win && GTK_WIDGET_REALIZED(win->GetHandle()))
 394         window = win->GetHandle()->window;
 395 #endif
 396
 397     switch (index)
 398     {
 399 #ifdef __WXGTK20__
 400         case wxSYS_BORDER_X:
 401         case wxSYS_BORDER_Y:
 402         case wxSYS_EDGE_X:
 403         case wxSYS_EDGE_Y:
 404         case wxSYS_FRAMESIZE_X:
 405         case wxSYS_FRAMESIZE_Y:
 406             // If a window is specified/realized, and it is a toplevel window, we can query from wm.
 407             // The returned border thickness is outside the client area in that case.
 408             if (window)
 409             {
 410                 wxTopLevelWindow *tlw = wxDynamicCast(win, wxTopLevelWindow);
 411                 if (!tlw)
 412                     return -1; // not a tlw, not sure how to approach
 413                 else
 414                 {
 415                     // Check if wm supports frame extents - we can't know
 416                     // the border widths if it does not.
 417 #if GTK_CHECK_VERSION(2,2,0)
 418                     if (!gtk_check_version(2,2,0))
 419                     {
 420                         if (!gdk_x11_screen_supports_net_wm_hint(
 421                                 gdk_drawable_get_screen(window),
 422                                 gdk_atom_intern("_NET_FRAME_EXTENTS", false) ) )
 423                             return -1;
 424                     }
 425                     else
 426 #endif
 427                     {
 428                         if (!gdk_net_wm_supports(gdk_atom_intern("_NET_FRAME_EXTENTS", false)))
 429                             return -1;
 430                     }
 431
 432                     // Get the frame extents from the windowmanager.
 433                     // In most cases the top extent is the titlebar, so we use the bottom extent
 434                     // for the heights.
 435
 436                     Atom type;
 437                     gint format;
 438                     gulong nitems;
 439
 440 #if GTK_CHECK_VERSION(2,2,0)
 441                     if (!gtk_check_version(2,2,0))
 442                     {
 443                         gulong bytes_after;
 444                         success = (XGetWindowProperty (GDK_DISPLAY_XDISPLAY(gdk_drawable_get_display(window)),
 445                                             GDK_WINDOW_XWINDOW(window),
 446                                             gdk_x11_get_xatom_by_name_for_display (
 447                                                     gdk_drawable_get_display(window),
 448                                                     "_NET_FRAME_EXTENTS" ),
 449                                             0, // left, right, top, bottom, CARDINAL[4]/32
 450                                             G_MAXLONG, // size of long
 451                                             false, // do not delete property
 452                                             XA_CARDINAL, // 32 bit
 453                                             &type, &format, &nitems, &bytes_after, &data
 454                                            ) == Success);
 455                     }
 456 #endif
 457                     if (success)
 458                     {
 459                         int border_return = -1;
 460
 461                         if ((type == XA_CARDINAL) && (format == 32) && (nitems >= 4) && (data))
 462                         {
 463                             long *borders;
 464                             borders = (long*)data;
 465                             switch(index)
 466                             {
 467                                 case wxSYS_BORDER_X:
 468                                 case wxSYS_EDGE_X:
 469                                 case wxSYS_FRAMESIZE_X:
 470                                     border_return = borders[1]; // width of right extent
 471                                     break;
 472                                 default:
 473                                     border_return = borders[3]; // height of bottom extent
 474                                     break;
 475                             }
 476                         }
 477
 478                         if (data)
 479                             XFree(data);
 480
 481                         return border_return;
 482                     }
 483                 }
 484             }
 485
 486             return -1; // no window specified
 487 #endif // gtk2
 488
 489         case wxSYS_CURSOR_X:
 490         case wxSYS_CURSOR_Y:
 491 #ifdef __WXGTK24__
 492             if (!gtk_check_version(2,4,0))
 493             {
 494                 if (window)
 495                     return gdk_display_get_default_cursor_size(gdk_drawable_get_display(window));
 496                 else
 497                     return gdk_display_get_default_cursor_size(gdk_display_get_default());
 498             }
 499             else
 500 #endif
 501                 return 16;
 502
 503 #ifdef __WXGTK20__
 504         case wxSYS_DCLICK_X:
 505         case wxSYS_DCLICK_Y:
 506             gint dclick_distance;
 507 #if GTK_CHECK_VERSION(2,2,0)
 508             if (window && !gtk_check_version(2,2,0))
 509                 g_object_get(gtk_settings_get_for_screen(gdk_drawable_get_screen(window)),
 510                                 "gtk-double-click-distance", &dclick_distance, NULL);
 511             else
 512 #endif
 513                 g_object_get(gtk_settings_get_default(),
 514                                 "gtk-double-click-distance", &dclick_distance, NULL);
 515
 516             return dclick_distance * 2;
 517 #endif // gtk2
 518
 519 #ifdef __WXGTK20__
 520         case wxSYS_DRAG_X:
 521         case wxSYS_DRAG_Y:
 522             gint drag_threshold;
 523 #if GTK_CHECK_VERSION(2,2,0)
 524             if (window && !gtk_check_version(2,2,0))
 525             {
 526                 g_object_get(
 527                         gtk_settings_get_for_screen(gdk_drawable_get_screen(window)),
 528                         "gtk-dnd-drag-threshold",
 529                         &drag_threshold, NULL);
 530             }
 531             else
 532 #endif
 533             {
 534                 g_object_get(gtk_settings_get_default(),
 535                              "gtk-dnd-drag-threshold", &drag_threshold, NULL);
 536             }
 537
 538             return drag_threshold * 2;
 539 #endif
 540
 541         // MBN: ditto for icons
 542         case wxSYS_ICON_X:     return 32;
 543         case wxSYS_ICON_Y:     return 32;
 544
 545         case wxSYS_SCREEN_X:
 546 #if defined(__WXGTK20__) && GTK_CHECK_VERSION(2,2,0)
 547             if (window && !gtk_check_version(2,2,0))
 548                 return gdk_screen_get_width(gdk_drawable_get_screen(window));
 549             else
 550 #endif
 551                 return gdk_screen_width();
 552
 553         case wxSYS_SCREEN_Y:
 554 #if defined(__WXGTK20__) && GTK_CHECK_VERSION(2,2,0)
 555             if (window && !gtk_check_version(2,2,0))
 556                 return gdk_screen_get_height(gdk_drawable_get_screen(window));
 557             else
 558 #endif
 559                 return gdk_screen_height();
 560
 561         case wxSYS_HSCROLL_Y:  return 15;
 562         case wxSYS_VSCROLL_X:  return 15;
 563
 564 // a gtk1 implementation should be possible too if gtk2 efficiency/convenience functions aren't used
 565 #ifdef __WXGTK20__
 566         case wxSYS_CAPTION_Y:
 567             if (!window)
 568                 // No realized window specified, and no implementation for that case yet.
 569                 return -1;
 570
 571             // Check if wm supports frame extents - we can't know the caption height if it does not.
 572 #if GTK_CHECK_VERSION(2,2,0)
 573             if (!gtk_check_version(2,2,0))
 574             {
 575                 if (!gdk_x11_screen_supports_net_wm_hint(
 576                         gdk_drawable_get_screen(window),
 577                         gdk_atom_intern("_NET_FRAME_EXTENTS", false) ) )
 578                     return -1;
 579             }
 580             else
 581 #endif
 582             {
 583                 if (!gdk_net_wm_supports(gdk_atom_intern("_NET_FRAME_EXTENTS", false)))
 584                     return -1;
 585             }
 586
 587             wxASSERT_MSG( wxDynamicCast(win, wxTopLevelWindow),
 588                           wxT("Asking for caption height of a non toplevel window") );
 589
 590             // Get the height of the top windowmanager border.
 591             // This is the titlebar in most cases. The titlebar might be elsewhere, and
 592             // we could check which is the thickest wm border to decide on which side the
 593             // titlebar is, but this might lead to interesting behaviours in used code.
 594             // Reconsider when we have a way to report to the user on which side it is.
 595
 596             Atom type;
 597             gint format;
 598             gulong nitems;
 599
 600 #if GTK_CHECK_VERSION(2,2,0)
 601             if (!gtk_check_version(2,2,0))
 602             {
 603                 gulong bytes_after;
 604                 success = (XGetWindowProperty (GDK_DISPLAY_XDISPLAY(gdk_drawable_get_display(window)),
 605                                     GDK_WINDOW_XWINDOW(window),
 606                                     gdk_x11_get_xatom_by_name_for_display (
 607                                             gdk_drawable_get_display(window),
 608                                             "_NET_FRAME_EXTENTS" ),
 609                                     0, // left, right, top, bottom, CARDINAL[4]/32
 610                                     G_MAXLONG, // size of long
 611                                     false, // do not delete property
 612                                     XA_CARDINAL, // 32 bit
 613                                     &type, &format, &nitems, &bytes_after, &data
 614                                    ) == Success);
 615             }
 616 #endif
 617             if (success)
 618             {
 619                 int caption_height = -1;
 620
 621                 if ((type == XA_CARDINAL) && (format == 32) && (nitems >= 3) && (data))
 622                 {
 623                     long *borders;
 624                     borders = (long*)data;
 625                     caption_height = borders[2]; // top frame extent
 626                 }
 627
 628                 if (data)
 629                     XFree(data);
 630
 631                 return caption_height;
 632             }
 633
 634             // Try a default approach without a window pointer, if possible
 635             // ...
 636
 637             return -1;
 638 #endif // gtk2
 639
 640         case wxSYS_PENWINDOWS_PRESENT:
 641             // No MS Windows for Pen computing extension available in X11 based gtk+.
 642             return 0;
 643
 644         default:
 645             return -1;   // metric is unknown
 646     }
 647 }
 648
 649 bool wxSystemSettingsNative::HasFeature(wxSystemFeature index)
 650 {
 651     switch (index)
 652     {
 653         case wxSYS_CAN_ICONIZE_FRAME:
 654             return FALSE;
 655
 656         case wxSYS_CAN_DRAW_FRAME_DECORATIONS:
 657             return TRUE;
 658
 659         default:
 660             return FALSE;
 661     }
 662 }