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
  12 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  13 #pragma implementation "settings.h"
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #include "wx/settings.h"
  20 #include "wx/debug.h"
  21 #include "wx/cmndata.h"
  22 #include "wx/fontutil.h"
  23 #include "wx/toplevel.h"
  24
  25 #include <gdk/gdk.h>
  26 #include <gdk/gdkx.h>
  27 #include <gdk/gdkprivate.h>
  28 #include <gtk/gtk.h>
  29
  30 #include <X11/Xatom.h>
  31
  32 #define SHIFT (8*(sizeof(short int)-sizeof(char)))
  33
  34 // ----------------------------------------------------------------------------
  35 // wxSystemObjects
  36 // ----------------------------------------------------------------------------
  37
  38 struct wxSystemObjects
  39 {
  40     wxColour m_colBtnFace,
  41              m_colBtnShadow,
  42              m_colBtnHighlight,
  43              m_colHighlight,
  44              m_colHighlightText,
  45              m_colListBox,
  46              m_colBtnText,
  47              m_colMenuItemHighlight,
  48              m_colTooltip,
  49              m_colTooltipText;
  50
  51     wxFont m_fontSystem;
  52 };
  53
  54 static wxSystemObjects gs_objects;
  55
  56 // ----------------------------------------------------------------------------
  57 // wxSystemSettings implementation
  58 // ----------------------------------------------------------------------------
  59
  60 // kind of widget to use in GetColourFromGTKWidget
  61 enum wxGtkWidgetType
  62 {
  63     wxGTK_BUTTON,
  64     wxGTK_LIST,
  65     wxGTK_MENUITEM
  66 };
  67
  68 // the colour we need
  69 enum wxGtkColourType
  70 {
  71     wxGTK_FG,
  72     wxGTK_BG,
  73     wxGTK_BASE
  74 };
  75
  76 // wxSystemSettings::GetColour() helper: get the colours from a GTK+
  77 // widget style, return true if we did get them, false to use defaults
  78 static bool GetColourFromGTKWidget(int& red, int& green, int& blue,
  79                                    wxGtkWidgetType type = wxGTK_BUTTON,
  80                                    GtkStateType state = GTK_STATE_NORMAL,
  81                                    wxGtkColourType colour = wxGTK_BG)
  82 {
  83     GtkWidget *widget;
  84     switch ( type )
  85     {
  86         default:
  87             wxFAIL_MSG( _T("unexpected GTK widget type") );
  88             // fall through
  89
  90         case wxGTK_BUTTON:
  91             widget = gtk_button_new();
  92             break;
  93
  94         case wxGTK_LIST:
  95             widget = gtk_list_new();
  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     bool ok;
 107     if ( def )
 108     {
 109         GdkColor *col;
 110         switch ( colour )
 111         {
 112             default:
 113                 wxFAIL_MSG( _T("unexpected GTK colour type") );
 114                 // fall through
 115
 116             case wxGTK_FG:
 117                 col = def->fg;
 118                 break;
 119
 120             case wxGTK_BG:
 121                 col = def->bg;
 122                 break;
 123
 124             case wxGTK_BASE:
 125                 col = def->base;
 126                 break;
 127         }
 128
 129         red = col[state].red;
 130         green = col[state].green;
 131         blue = col[state].blue;
 132
 133         ok = TRUE;
 134     }
 135     else
 136     {
 137         ok = FALSE;
 138     }
 139
 140     gtk_widget_destroy( widget );
 141
 142     return ok;
 143 }
 144
 145 static void GetTooltipColors()
 146 {
 147     GtkTooltips* tooltips = gtk_tooltips_new();
 148     gtk_tooltips_force_window(tooltips);
 149     gtk_widget_ensure_style(tooltips->tip_window);
 150     GdkColor c = tooltips->tip_window->style->bg[GTK_STATE_NORMAL];
 151     gs_objects.m_colTooltip = wxColor(c.red >> SHIFT, c.green >> SHIFT, c.blue >> SHIFT);
 152     c = tooltips->tip_window->style->fg[GTK_STATE_NORMAL];
 153     gs_objects.m_colTooltipText = wxColor(c.red >> SHIFT, c.green >> SHIFT, c.blue >> SHIFT);
 154     gtk_object_sink(wx_reinterpret_cast(GtkObject*, tooltips));
 155 }
 156
 157 wxColour wxSystemSettingsNative::GetColour( wxSystemColour index )
 158 {
 159     switch (index)
 160     {
 161         case wxSYS_COLOUR_SCROLLBAR:
 162         case wxSYS_COLOUR_BACKGROUND:
 163         case wxSYS_COLOUR_INACTIVECAPTION:
 164         case wxSYS_COLOUR_MENU:
 165         case wxSYS_COLOUR_WINDOWFRAME:
 166         case wxSYS_COLOUR_ACTIVEBORDER:
 167         case wxSYS_COLOUR_INACTIVEBORDER:
 168         case wxSYS_COLOUR_BTNFACE:
 169         case wxSYS_COLOUR_MENUBAR:
 170         case wxSYS_COLOUR_3DLIGHT:
 171             if (!gs_objects.m_colBtnFace.Ok())
 172             {
 173                 int red, green, blue;
 174                 if ( !GetColourFromGTKWidget(red, green, blue) )
 175                 {
 176                     red =
 177                     green = 0;
 178                     blue = 0x9c40;
 179                 }
 180
 181                 gs_objects.m_colBtnFace = wxColour( red   >> SHIFT,
 182                                                    green >> SHIFT,
 183                                                    blue  >> SHIFT );
 184             }
 185             return gs_objects.m_colBtnFace;
 186
 187         case wxSYS_COLOUR_WINDOW:
 188             return *wxWHITE;
 189
 190         case wxSYS_COLOUR_3DDKSHADOW:
 191             return *wxBLACK;
 192
 193         case wxSYS_COLOUR_GRAYTEXT:
 194         case wxSYS_COLOUR_BTNSHADOW:
 195         //case wxSYS_COLOUR_3DSHADOW:
 196             if (!gs_objects.m_colBtnShadow.Ok())
 197             {
 198                 wxColour faceColour(GetColour(wxSYS_COLOUR_3DFACE));
 199                 gs_objects.m_colBtnShadow =
 200                    wxColour((unsigned char) (faceColour.Red() * 0.666),
 201                             (unsigned char) (faceColour.Green() * 0.666),
 202                             (unsigned char) (faceColour.Blue() * 0.666));
 203             }
 204
 205             return gs_objects.m_colBtnShadow;
 206
 207         case wxSYS_COLOUR_3DHIGHLIGHT:
 208         //case wxSYS_COLOUR_BTNHIGHLIGHT:
 209             return * wxWHITE;
 210
 211         case wxSYS_COLOUR_HIGHLIGHT:
 212             if (!gs_objects.m_colHighlight.Ok())
 213             {
 214                 int red, green, blue;
 215                 if ( !GetColourFromGTKWidget(red, green, blue,
 216                                              wxGTK_BUTTON,
 217                                              GTK_STATE_SELECTED) )
 218                 {
 219                     red =
 220                     green = 0;
 221                     blue = 0x9c40;
 222                 }
 223
 224                 gs_objects.m_colHighlight = wxColour( red   >> SHIFT,
 225                                                         green >> SHIFT,
 226                                                         blue  >> SHIFT );
 227             }
 228             return gs_objects.m_colHighlight;
 229
 230         case wxSYS_COLOUR_LISTBOX:
 231             if (!gs_objects.m_colListBox.Ok())
 232             {
 233                 int red, green, blue;
 234                 if ( GetColourFromGTKWidget(red, green, blue,
 235                                             wxGTK_LIST,
 236                                             GTK_STATE_NORMAL,
 237                                             wxGTK_BASE) )
 238                 {
 239                     gs_objects.m_colListBox = wxColour( red   >> SHIFT,
 240                                                           green >> SHIFT,
 241                                                           blue  >> SHIFT );
 242                 }
 243                 else
 244                 {
 245                     gs_objects.m_colListBox = wxColour(*wxWHITE);
 246                 }
 247             }
 248             return gs_objects.m_colListBox;
 249
 250         case wxSYS_COLOUR_MENUTEXT:
 251         case wxSYS_COLOUR_WINDOWTEXT:
 252         case wxSYS_COLOUR_CAPTIONTEXT:
 253         case wxSYS_COLOUR_INACTIVECAPTIONTEXT:
 254         case wxSYS_COLOUR_BTNTEXT:
 255             if (!gs_objects.m_colBtnText.Ok())
 256             {
 257                 int red, green, blue;
 258                 if ( !GetColourFromGTKWidget(red, green, blue,
 259                                              wxGTK_BUTTON,
 260                                              GTK_STATE_NORMAL,
 261                                              wxGTK_FG) )
 262                 {
 263                     red =
 264                     green =
 265                     blue = 0;
 266                 }
 267
 268                 gs_objects.m_colBtnText = wxColour( red   >> SHIFT,
 269                                                       green >> SHIFT,
 270                                                       blue  >> SHIFT );
 271             }
 272             return gs_objects.m_colBtnText;
 273
 274         case wxSYS_COLOUR_INFOBK:
 275             if (!gs_objects.m_colTooltip.Ok()) {
 276                 GetTooltipColors();
 277             }
 278             return gs_objects.m_colTooltip;
 279
 280         case wxSYS_COLOUR_INFOTEXT:
 281             if (!gs_objects.m_colTooltipText.Ok()) {
 282                 GetTooltipColors();
 283             }
 284             return gs_objects.m_colTooltipText;
 285
 286         case wxSYS_COLOUR_HIGHLIGHTTEXT:
 287             if (!gs_objects.m_colHighlightText.Ok())
 288             {
 289                 wxColour hclr = GetColour(wxSYS_COLOUR_HIGHLIGHT);
 290                 if (hclr.Red() > 200 && hclr.Green() > 200 && hclr.Blue() > 200)
 291                     gs_objects.m_colHighlightText = wxColour(*wxBLACK);
 292                 else
 293                     gs_objects.m_colHighlightText = wxColour(*wxWHITE);
 294             }
 295             return gs_objects.m_colHighlightText;
 296
 297         case wxSYS_COLOUR_APPWORKSPACE:
 298             return *wxWHITE;    // ?
 299
 300         case wxSYS_COLOUR_ACTIVECAPTION:
 301         case wxSYS_COLOUR_MENUHILIGHT:
 302             if (!gs_objects.m_colMenuItemHighlight.Ok())
 303             {
 304                 int red, green, blue;
 305                 if ( !GetColourFromGTKWidget(red, green, blue,
 306                                              wxGTK_MENUITEM,
 307                                              GTK_STATE_SELECTED,
 308                                              wxGTK_BG) )
 309                 {
 310                     red =
 311                     green =
 312                     blue = 0;
 313                 }
 314
 315                 gs_objects.m_colMenuItemHighlight = wxColour( red  >> SHIFT,
 316                                                               green >> SHIFT,
 317                                                               blue  >> SHIFT );
 318             }
 319             return gs_objects.m_colMenuItemHighlight;
 320
 321         case wxSYS_COLOUR_HOTLIGHT:
 322         case wxSYS_COLOUR_GRADIENTACTIVECAPTION:
 323         case wxSYS_COLOUR_GRADIENTINACTIVECAPTION:
 324             // TODO
 325             return *wxBLACK;
 326
 327         case wxSYS_COLOUR_MAX:
 328         default:
 329             wxFAIL_MSG( _T("unknown system colour index") );
 330     }
 331
 332     return *wxWHITE;
 333 }
 334
 335 wxFont wxSystemSettingsNative::GetFont( wxSystemFont index )
 336 {
 337     switch (index)
 338     {
 339         case wxSYS_OEM_FIXED_FONT:
 340         case wxSYS_ANSI_FIXED_FONT:
 341         case wxSYS_SYSTEM_FIXED_FONT:
 342         {
 343             return *wxNORMAL_FONT;
 344         }
 345         case wxSYS_ANSI_VAR_FONT:
 346         case wxSYS_SYSTEM_FONT:
 347         case wxSYS_DEVICE_DEFAULT_FONT:
 348         case wxSYS_DEFAULT_GUI_FONT:
 349         {
 350             if (!gs_objects.m_fontSystem.Ok())
 351             {
 352 #ifdef __WXGTK20__
 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 #else
 380                 gs_objects.m_fontSystem = wxFont( 12, wxSWISS, wxNORMAL, wxNORMAL );
 381 #endif
 382             }
 383             return gs_objects.m_fontSystem;
 384         }
 385
 386         default:
 387             return wxNullFont;
 388     }
 389 }
 390
 391 int wxSystemSettingsNative::GetMetric( wxSystemMetric index, wxWindow* win )
 392 {
 393 #ifdef __WXGTK20__
 394     bool success = false;
 395
 396     guchar *data = NULL;
 397     GdkWindow *window = NULL;
 398     if(win && GTK_WIDGET_REALIZED(win->GetHandle()))
 399         window = win->GetHandle()->window;
 400 #endif
 401
 402     switch (index)
 403     {
 404 #ifdef __WXGTK20__
 405         case wxSYS_BORDER_X:
 406         case wxSYS_BORDER_Y:
 407         case wxSYS_EDGE_X:
 408         case wxSYS_EDGE_Y:
 409         case wxSYS_FRAMESIZE_X:
 410         case wxSYS_FRAMESIZE_Y:
 411             // If a window is specified/realized, and it is a toplevel window, we can query from wm.
 412             // The returned border thickness is outside the client area in that case.
 413             if (window)
 414             {
 415                 wxTopLevelWindow *tlw = wxDynamicCast(win, wxTopLevelWindow);
 416                 if (!tlw)
 417                     return -1; // not a tlw, not sure how to approach
 418                 else
 419                 {
 420                     // Check if wm supports frame extents - we can't know
 421                     // the border widths if it does not.
 422 #if GTK_CHECK_VERSION(2,2,0)
 423                     if (!gtk_check_version(2,2,0))
 424                     {
 425                         if (!gdk_x11_screen_supports_net_wm_hint(
 426                                 gdk_drawable_get_screen(window),
 427                                 gdk_atom_intern("_NET_FRAME_EXTENTS", false) ) )
 428                             return -1;
 429                     }
 430                     else
 431 #endif
 432                     {
 433                         if (!gdk_net_wm_supports(gdk_atom_intern("_NET_FRAME_EXTENTS", false)))
 434                             return -1;
 435                     }
 436
 437                     // Get the frame extents from the windowmanager.
 438                     // In most cases the top extent is the titlebar, so we use the bottom extent
 439                     // for the heights.
 440
 441                     Atom type;
 442                     gint format;
 443                     gulong nitems;
 444
 445 #if GTK_CHECK_VERSION(2,2,0)
 446                     if (!gtk_check_version(2,2,0))
 447                     {
 448                         gulong bytes_after;
 449                         success = (XGetWindowProperty (GDK_DISPLAY_XDISPLAY(gdk_drawable_get_display(window)),
 450                                             GDK_WINDOW_XWINDOW(window),
 451                                             gdk_x11_get_xatom_by_name_for_display (
 452                                                     gdk_drawable_get_display(window),
 453                                                     "_NET_FRAME_EXTENTS" ),
 454                                             0, // left, right, top, bottom, CARDINAL[4]/32
 455                                             G_MAXLONG, // size of long
 456                                             false, // do not delete property
 457                                             XA_CARDINAL, // 32 bit
 458                                             &type, &format, &nitems, &bytes_after, &data
 459                                            ) == Success);
 460                     }
 461 #endif
 462                     if (success)
 463                     {
 464                         int border_return = -1;
 465
 466                         if ((type == XA_CARDINAL) && (format == 32) && (nitems >= 4) && (data))
 467                         {
 468                             long *borders;
 469                             borders = (long*)data;
 470                             switch(index)
 471                             {
 472                                 case wxSYS_BORDER_X:
 473                                 case wxSYS_EDGE_X:
 474                                 case wxSYS_FRAMESIZE_X:
 475                                     border_return = borders[1]; // width of right extent
 476                                     break;
 477                                 default:
 478                                     border_return = borders[3]; // height of bottom extent
 479                                     break;
 480                             }
 481                         }
 482
 483                         if (data)
 484                             XFree(data);
 485
 486                         return border_return;
 487                     }
 488                 }
 489             }
 490
 491             return -1; // no window specified
 492 #endif // gtk2
 493
 494         case wxSYS_CURSOR_X:
 495         case wxSYS_CURSOR_Y:
 496 #ifdef __WXGTK24__
 497             if (!gtk_check_version(2,4,0))
 498             {
 499                 if (window)
 500                     return gdk_display_get_default_cursor_size(gdk_drawable_get_display(window));
 501                 else
 502                     return gdk_display_get_default_cursor_size(gdk_display_get_default());
 503             }
 504             else
 505 #endif
 506                 return 16;
 507
 508 #ifdef __WXGTK20__
 509         case wxSYS_DCLICK_X:
 510         case wxSYS_DCLICK_Y:
 511             gint dclick_distance;
 512 #if GTK_CHECK_VERSION(2,2,0)
 513             if (window && !gtk_check_version(2,2,0))
 514                 g_object_get(gtk_settings_get_for_screen(gdk_drawable_get_screen(window)),
 515                                 "gtk-double-click-distance", &dclick_distance, NULL);
 516             else
 517 #endif
 518                 g_object_get(gtk_settings_get_default(),
 519                                 "gtk-double-click-distance", &dclick_distance, NULL);
 520
 521             return dclick_distance * 2;
 522 #endif // gtk2
 523
 524 #ifdef __WXGTK20__
 525         case wxSYS_DRAG_X:
 526         case wxSYS_DRAG_Y:
 527             gint drag_threshold;
 528 #if GTK_CHECK_VERSION(2,2,0)
 529             if (window && !gtk_check_version(2,2,0))
 530             {
 531                 g_object_get(
 532                         gtk_settings_get_for_screen(gdk_drawable_get_screen(window)),
 533                         "gtk-dnd-drag-threshold",
 534                         &drag_threshold, NULL);
 535             }
 536             else
 537 #endif
 538             {
 539                 g_object_get(gtk_settings_get_default(),
 540                              "gtk-dnd-drag-threshold", &drag_threshold, NULL);
 541             }
 542
 543             return drag_threshold * 2;
 544 #endif
 545
 546         // MBN: ditto for icons
 547         case wxSYS_ICON_X:     return 32;
 548         case wxSYS_ICON_Y:     return 32;
 549
 550         case wxSYS_SCREEN_X:
 551 #if defined(__WXGTK20__) && GTK_CHECK_VERSION(2,2,0)
 552             if (window && !gtk_check_version(2,2,0))
 553                 return gdk_screen_get_width(gdk_drawable_get_screen(window));
 554             else
 555 #endif
 556                 return gdk_screen_width();
 557
 558         case wxSYS_SCREEN_Y:
 559 #if defined(__WXGTK20__) && GTK_CHECK_VERSION(2,2,0)
 560             if (window && !gtk_check_version(2,2,0))
 561                 return gdk_screen_get_height(gdk_drawable_get_screen(window));
 562             else
 563 #endif
 564                 return gdk_screen_height();
 565
 566         case wxSYS_HSCROLL_Y:  return 15;
 567         case wxSYS_VSCROLL_X:  return 15;
 568
 569 // a gtk1 implementation should be possible too if gtk2 efficiency/convenience functions aren't used
 570 #ifdef __WXGTK20__
 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             // Check if wm supports frame extents - we can't know the caption height if it does not.
 577 #if GTK_CHECK_VERSION(2,2,0)
 578             if (!gtk_check_version(2,2,0))
 579             {
 580                 if (!gdk_x11_screen_supports_net_wm_hint(
 581                         gdk_drawable_get_screen(window),
 582                         gdk_atom_intern("_NET_FRAME_EXTENTS", false) ) )
 583                     return -1;
 584             }
 585             else
 586 #endif
 587             {
 588                 if (!gdk_net_wm_supports(gdk_atom_intern("_NET_FRAME_EXTENTS", false)))
 589                     return -1;
 590             }
 591
 592             wxASSERT_MSG( wxDynamicCast(win, wxTopLevelWindow),
 593                           wxT("Asking for caption height of a non toplevel window") );
 594
 595             // Get the height of the top windowmanager border.
 596             // This is the titlebar in most cases. The titlebar might be elsewhere, and
 597             // we could check which is the thickest wm border to decide on which side the
 598             // titlebar is, but this might lead to interesting behaviours in used code.
 599             // Reconsider when we have a way to report to the user on which side it is.
 600
 601             Atom type;
 602             gint format;
 603             gulong nitems;
 604
 605 #if GTK_CHECK_VERSION(2,2,0)
 606             if (!gtk_check_version(2,2,0))
 607             {
 608                 gulong bytes_after;
 609                 success = (XGetWindowProperty (GDK_DISPLAY_XDISPLAY(gdk_drawable_get_display(window)),
 610                                     GDK_WINDOW_XWINDOW(window),
 611                                     gdk_x11_get_xatom_by_name_for_display (
 612                                             gdk_drawable_get_display(window),
 613                                             "_NET_FRAME_EXTENTS" ),
 614                                     0, // left, right, top, bottom, CARDINAL[4]/32
 615                                     G_MAXLONG, // size of long
 616                                     false, // do not delete property
 617                                     XA_CARDINAL, // 32 bit
 618                                     &type, &format, &nitems, &bytes_after, &data
 619                                    ) == Success);
 620             }
 621 #endif
 622             if (success)
 623             {
 624                 int caption_height = -1;
 625
 626                 if ((type == XA_CARDINAL) && (format == 32) && (nitems >= 3) && (data))
 627                 {
 628                     long *borders;
 629                     borders = (long*)data;
 630                     caption_height = borders[2]; // top frame extent
 631                 }
 632
 633                 if (data)
 634                     XFree(data);
 635
 636                 return caption_height;
 637             }
 638
 639             // Try a default approach without a window pointer, if possible
 640             // ...
 641
 642             return -1;
 643 #endif // gtk2
 644
 645         case wxSYS_PENWINDOWS_PRESENT:
 646             // No MS Windows for Pen computing extension available in X11 based gtk+.
 647             return 0;
 648
 649         default:
 650             return -1;   // metric is unknown
 651     }
 652 }
 653
 654 bool wxSystemSettingsNative::HasFeature(wxSystemFeature index)
 655 {
 656     switch (index)
 657     {
 658         case wxSYS_CAN_ICONIZE_FRAME:
 659             return FALSE;
 660             break;
 661         case wxSYS_CAN_DRAW_FRAME_DECORATIONS:
 662             return TRUE;
 663             break;
 664         default:
 665             return FALSE;
 666     }
 667 }