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 // Using gtk_list_new, which is deprecated since GTK2
  24 // Using gtk_object_sink, which is deprecated since GTK+-2.9.0
  25 #ifdef GTK_DISABLE_DEPRECATED
  26 #undef GTK_DISABLE_DEPRECATED
  27 #endif
  28
  29 #include <gdk/gdk.h>
  30 #include <gdk/gdkx.h>
  31 #include <gdk/gdkprivate.h>
  32 #include <gtk/gtk.h>
  33
  34 #include <X11/Xatom.h>
  35
  36 #define SHIFT (8*(sizeof(short int)-sizeof(char)))
  37
  38 // ----------------------------------------------------------------------------
  39 // wxSystemObjects
  40 // ----------------------------------------------------------------------------
  41
  42 struct wxSystemObjects
  43 {
  44     wxColour m_colBtnFace,
  45              m_colBtnShadow,
  46              m_colBtnHighlight,
  47              m_colHighlight,
  48              m_colHighlightText,
  49              m_colListBox,
  50              m_colBtnText,
  51              m_colMenuItemHighlight,
  52              m_colTooltip,
  53              m_colTooltipText;
  54
  55     wxFont m_fontSystem;
  56 };
  57
  58 static wxSystemObjects gs_objects;
  59
  60 // ----------------------------------------------------------------------------
  61 // wxSystemSettings implementation
  62 // ----------------------------------------------------------------------------
  63
  64 // kind of widget to use in GetColourFromGTKWidget
  65 enum wxGtkWidgetType
  66 {
  67     wxGTK_BUTTON,
  68     wxGTK_LIST,
  69     wxGTK_MENUITEM
  70 };
  71
  72 // the colour we need
  73 enum wxGtkColourType
  74 {
  75     wxGTK_FG,
  76     wxGTK_BG,
  77     wxGTK_BASE
  78 };
  79
  80 // wxSystemSettings::GetColour() helper: get the colours from a GTK+
  81 // widget style, return true if we did get them, false to use defaults
  82 static bool GetColourFromGTKWidget(int& red, int& green, int& blue,
  83                                    wxGtkWidgetType type = wxGTK_BUTTON,
  84                                    GtkStateType state = GTK_STATE_NORMAL,
  85                                    wxGtkColourType colour = wxGTK_BG)
  86 {
  87     GtkWidget *widget;
  88     switch ( type )
  89     {
  90         default:
  91             wxFAIL_MSG( _T("unexpected GTK widget type") );
  92             // fall through
  93
  94         case wxGTK_BUTTON:
  95             widget = gtk_button_new();
  96             break;
  97
  98         case wxGTK_LIST:
  99             widget = gtk_list_new();
 100             break;
 101
 102         case wxGTK_MENUITEM:
 103             widget = gtk_menu_item_new();
 104     }
 105
 106     GtkStyle *def = gtk_rc_get_style( widget );
 107     if ( !def )
 108         def = gtk_widget_get_default_style();
 109
 110     bool ok;
 111     if ( def )
 112     {
 113         GdkColor *col;
 114         switch ( colour )
 115         {
 116             default:
 117                 wxFAIL_MSG( _T("unexpected GTK colour type") );
 118                 // fall through
 119
 120             case wxGTK_FG:
 121                 col = def->fg;
 122                 break;
 123
 124             case wxGTK_BG:
 125                 col = def->bg;
 126                 break;
 127
 128             case wxGTK_BASE:
 129                 col = def->base;
 130                 break;
 131         }
 132
 133         red = col[state].red;
 134         green = col[state].green;
 135         blue = col[state].blue;
 136
 137         ok = true;
 138     }
 139     else
 140     {
 141         ok = false;
 142     }
 143
 144     gtk_widget_destroy( widget );
 145
 146     return ok;
 147 }
 148
 149 static void GetTooltipColors()
 150 {
 151     GtkTooltips* tooltips = gtk_tooltips_new();
 152     gtk_tooltips_force_window(tooltips);
 153     gtk_widget_ensure_style(tooltips->tip_window);
 154     GdkColor c = tooltips->tip_window->style->bg[GTK_STATE_NORMAL];
 155     gs_objects.m_colTooltip = wxColor(c.red >> SHIFT, c.green >> SHIFT, c.blue >> SHIFT);
 156     c = tooltips->tip_window->style->fg[GTK_STATE_NORMAL];
 157     gs_objects.m_colTooltipText = wxColor(c.red >> SHIFT, c.green >> SHIFT, c.blue >> SHIFT);
 158     gtk_object_sink(wx_reinterpret_cast(GtkObject*, tooltips));
 159 }
 160
 161 wxColour wxSystemSettingsNative::GetColour( wxSystemColour index )
 162 {
 163     switch (index)
 164     {
 165         case wxSYS_COLOUR_SCROLLBAR:
 166         case wxSYS_COLOUR_BACKGROUND:
 167         case wxSYS_COLOUR_INACTIVECAPTION:
 168         case wxSYS_COLOUR_MENU:
 169         case wxSYS_COLOUR_WINDOWFRAME:
 170         case wxSYS_COLOUR_ACTIVEBORDER:
 171         case wxSYS_COLOUR_INACTIVEBORDER:
 172         case wxSYS_COLOUR_BTNFACE:
 173         case wxSYS_COLOUR_MENUBAR:
 174         case wxSYS_COLOUR_3DLIGHT:
 175             if (!gs_objects.m_colBtnFace.Ok())
 176             {
 177                 int red, green, blue;
 178                 if ( !GetColourFromGTKWidget(red, green, blue) )
 179                 {
 180                     red =
 181                     green = 0;
 182                     blue = 0x9c40;
 183                 }
 184
 185                 gs_objects.m_colBtnFace = wxColour( red   >> SHIFT,
 186                                                    green >> SHIFT,
 187                                                    blue  >> SHIFT );
 188             }
 189             return gs_objects.m_colBtnFace;
 190
 191         case wxSYS_COLOUR_WINDOW:
 192             return *wxWHITE;
 193
 194         case wxSYS_COLOUR_3DDKSHADOW:
 195             return *wxBLACK;
 196
 197         case wxSYS_COLOUR_GRAYTEXT:
 198         case wxSYS_COLOUR_BTNSHADOW:
 199         //case wxSYS_COLOUR_3DSHADOW:
 200             if (!gs_objects.m_colBtnShadow.Ok())
 201             {
 202                 wxColour faceColour(GetColour(wxSYS_COLOUR_3DFACE));
 203                 gs_objects.m_colBtnShadow =
 204                    wxColour((unsigned char) (faceColour.Red() * 0.666),
 205                             (unsigned char) (faceColour.Green() * 0.666),
 206                             (unsigned char) (faceColour.Blue() * 0.666));
 207             }
 208
 209             return gs_objects.m_colBtnShadow;
 210
 211         case wxSYS_COLOUR_3DHIGHLIGHT:
 212         //case wxSYS_COLOUR_BTNHIGHLIGHT:
 213             return * wxWHITE;
 214
 215         case wxSYS_COLOUR_HIGHLIGHT:
 216             if (!gs_objects.m_colHighlight.Ok())
 217             {
 218                 int red, green, blue;
 219                 if ( !GetColourFromGTKWidget(red, green, blue,
 220                                              wxGTK_BUTTON,
 221                                              GTK_STATE_SELECTED) )
 222                 {
 223                     red =
 224                     green = 0;
 225                     blue = 0x9c40;
 226                 }
 227
 228                 gs_objects.m_colHighlight = wxColour( red   >> SHIFT,
 229                                                         green >> SHIFT,
 230                                                         blue  >> SHIFT );
 231             }
 232             return gs_objects.m_colHighlight;
 233
 234         case wxSYS_COLOUR_LISTBOX:
 235             if (!gs_objects.m_colListBox.Ok())
 236             {
 237                 int red, green, blue;
 238                 if ( GetColourFromGTKWidget(red, green, blue,
 239                                             wxGTK_LIST,
 240                                             GTK_STATE_NORMAL,
 241                                             wxGTK_BASE) )
 242                 {
 243                     gs_objects.m_colListBox = wxColour( red   >> SHIFT,
 244                                                           green >> SHIFT,
 245                                                           blue  >> SHIFT );
 246                 }
 247                 else
 248                 {
 249                     gs_objects.m_colListBox = wxColour(*wxWHITE);
 250                 }
 251             }
 252             return gs_objects.m_colListBox;
 253
 254         case wxSYS_COLOUR_MENUTEXT:
 255         case wxSYS_COLOUR_WINDOWTEXT:
 256         case wxSYS_COLOUR_CAPTIONTEXT:
 257         case wxSYS_COLOUR_INACTIVECAPTIONTEXT:
 258         case wxSYS_COLOUR_BTNTEXT:
 259             if (!gs_objects.m_colBtnText.Ok())
 260             {
 261                 int red, green, blue;
 262                 if ( !GetColourFromGTKWidget(red, green, blue,
 263                                              wxGTK_BUTTON,
 264                                              GTK_STATE_NORMAL,
 265                                              wxGTK_FG) )
 266                 {
 267                     red =
 268                     green =
 269                     blue = 0;
 270                 }
 271
 272                 gs_objects.m_colBtnText = wxColour( red   >> SHIFT,
 273                                                       green >> SHIFT,
 274                                                       blue  >> SHIFT );
 275             }
 276             return gs_objects.m_colBtnText;
 277
 278         case wxSYS_COLOUR_INFOBK:
 279             if (!gs_objects.m_colTooltip.Ok()) {
 280                 GetTooltipColors();
 281             }
 282             return gs_objects.m_colTooltip;
 283
 284         case wxSYS_COLOUR_INFOTEXT:
 285             if (!gs_objects.m_colTooltipText.Ok()) {
 286                 GetTooltipColors();
 287             }
 288             return gs_objects.m_colTooltipText;
 289
 290         case wxSYS_COLOUR_HIGHLIGHTTEXT:
 291             if (!gs_objects.m_colHighlightText.Ok())
 292             {
 293                 wxColour hclr = GetColour(wxSYS_COLOUR_HIGHLIGHT);
 294                 if (hclr.Red() > 200 && hclr.Green() > 200 && hclr.Blue() > 200)
 295                     gs_objects.m_colHighlightText = wxColour(*wxBLACK);
 296                 else
 297                     gs_objects.m_colHighlightText = wxColour(*wxWHITE);
 298             }
 299             return gs_objects.m_colHighlightText;
 300
 301         case wxSYS_COLOUR_APPWORKSPACE:
 302             return *wxWHITE;    // ?
 303
 304         case wxSYS_COLOUR_ACTIVECAPTION:
 305         case wxSYS_COLOUR_MENUHILIGHT:
 306             if (!gs_objects.m_colMenuItemHighlight.Ok())
 307             {
 308                 int red, green, blue;
 309                 if ( !GetColourFromGTKWidget(red, green, blue,
 310                                              wxGTK_MENUITEM,
 311                                              GTK_STATE_SELECTED,
 312                                              wxGTK_BG) )
 313                 {
 314                     red =
 315                     green =
 316                     blue = 0;
 317                 }
 318
 319                 gs_objects.m_colMenuItemHighlight = wxColour( red  >> SHIFT,
 320                                                               green >> SHIFT,
 321                                                               blue  >> SHIFT );
 322             }
 323             return gs_objects.m_colMenuItemHighlight;
 324
 325         case wxSYS_COLOUR_HOTLIGHT:
 326         case wxSYS_COLOUR_GRADIENTACTIVECAPTION:
 327         case wxSYS_COLOUR_GRADIENTINACTIVECAPTION:
 328             // TODO
 329             return *wxBLACK;
 330
 331         case wxSYS_COLOUR_MAX:
 332         default:
 333             wxFAIL_MSG( _T("unknown system colour index") );
 334     }
 335
 336     return *wxWHITE;
 337 }
 338
 339 wxFont wxSystemSettingsNative::GetFont( wxSystemFont index )
 340 {
 341     switch (index)
 342     {
 343         case wxSYS_OEM_FIXED_FONT:
 344         case wxSYS_ANSI_FIXED_FONT:
 345         case wxSYS_SYSTEM_FIXED_FONT:
 346         {
 347             return *wxNORMAL_FONT;
 348         }
 349         case wxSYS_ANSI_VAR_FONT:
 350         case wxSYS_SYSTEM_FONT:
 351         case wxSYS_DEVICE_DEFAULT_FONT:
 352         case wxSYS_DEFAULT_GUI_FONT:
 353         {
 354             if (!gs_objects.m_fontSystem.Ok())
 355             {
 356                 GtkWidget *widget = gtk_button_new();
 357                 GtkStyle *def = gtk_rc_get_style( widget );
 358                 if ( !def || !def->font_desc )
 359                     def = gtk_widget_get_default_style();
 360                 if ( def && def->font_desc )
 361                 {
 362                     wxNativeFontInfo info;
 363                     info.description =
 364                         pango_font_description_copy(def->font_desc);
 365                     gs_objects.m_fontSystem = wxFont(info);
 366                 }
 367                 else
 368                 {
 369                     GtkSettings *settings = gtk_settings_get_default();
 370                     gchar *font_name = NULL;
 371                     g_object_get ( settings,
 372                                    "gtk-font-name",
 373                                    &font_name,
 374                                    NULL);
 375                     if (!font_name)
 376                         gs_objects.m_fontSystem = wxFont( 12, wxSWISS, wxNORMAL, wxNORMAL );
 377                     else
 378                         gs_objects.m_fontSystem = wxFont(wxString::FromAscii(font_name));
 379                     g_free (font_name);
 380                 }
 381                 gtk_widget_destroy( widget );
 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     bool success = false;
 394
 395     guchar *data = NULL;
 396     GdkWindow *window = NULL;
 397     if(win && GTK_WIDGET_REALIZED(win->GetHandle()))
 398         window = win->GetHandle()->window;
 399
 400     switch (index)
 401     {
 402         case wxSYS_BORDER_X:
 403         case wxSYS_BORDER_Y:
 404         case wxSYS_EDGE_X:
 405         case wxSYS_EDGE_Y:
 406         case wxSYS_FRAMESIZE_X:
 407         case wxSYS_FRAMESIZE_Y:
 408             // If a window is specified/realized, and it is a toplevel window, we can query from wm.
 409             // The returned border thickness is outside the client area in that case.
 410             if (window)
 411             {
 412                 wxTopLevelWindow *tlw = wxDynamicCast(win, wxTopLevelWindow);
 413                 if (!tlw)
 414                     return -1; // not a tlw, not sure how to approach
 415                 else
 416                 {
 417                     // Check if wm supports frame extents - we can't know
 418                     // the border widths if it does not.
 419 #if GTK_CHECK_VERSION(2,2,0)
 420                     if (!gtk_check_version(2,2,0))
 421                     {
 422                         if (!gdk_x11_screen_supports_net_wm_hint(
 423                                 gdk_drawable_get_screen(window),
 424                                 gdk_atom_intern("_NET_FRAME_EXTENTS", false) ) )
 425                             return -1;
 426                     }
 427                     else
 428 #endif
 429                     {
 430                         if (!gdk_net_wm_supports(gdk_atom_intern("_NET_FRAME_EXTENTS", false)))
 431                             return -1;
 432                     }
 433
 434                     // Get the frame extents from the windowmanager.
 435                     // In most cases the top extent is the titlebar, so we use the bottom extent
 436                     // for the heights.
 437
 438                     Atom type;
 439                     gint format;
 440                     gulong nitems;
 441
 442 #if GTK_CHECK_VERSION(2,2,0)
 443                     if (!gtk_check_version(2,2,0))
 444                     {
 445                         gulong bytes_after;
 446                         success = (XGetWindowProperty (GDK_DISPLAY_XDISPLAY(gdk_drawable_get_display(window)),
 447                                             GDK_WINDOW_XWINDOW(window),
 448                                             gdk_x11_get_xatom_by_name_for_display (
 449                                                     gdk_drawable_get_display(window),
 450                                                     "_NET_FRAME_EXTENTS" ),
 451                                             0, // left, right, top, bottom, CARDINAL[4]/32
 452                                             G_MAXLONG, // size of long
 453                                             false, // do not delete property
 454                                             XA_CARDINAL, // 32 bit
 455                                             &type, &format, &nitems, &bytes_after, &data
 456                                            ) == Success);
 457                     }
 458 #endif
 459                     if (success)
 460                     {
 461                         int border_return = -1;
 462
 463                         if ((type == XA_CARDINAL) && (format == 32) && (nitems >= 4) && (data))
 464                         {
 465                             long *borders;
 466                             borders = (long*)data;
 467                             switch(index)
 468                             {
 469                                 case wxSYS_BORDER_X:
 470                                 case wxSYS_EDGE_X:
 471                                 case wxSYS_FRAMESIZE_X:
 472                                     border_return = borders[1]; // width of right extent
 473                                     break;
 474                                 default:
 475                                     border_return = borders[3]; // height of bottom extent
 476                                     break;
 477                             }
 478                         }
 479
 480                         if (data)
 481                             XFree(data);
 482
 483                         return border_return;
 484                     }
 485                 }
 486             }
 487
 488             return -1; // no window specified
 489
 490         case wxSYS_CURSOR_X:
 491         case wxSYS_CURSOR_Y:
 492 #ifdef __WXGTK24__
 493             if (!gtk_check_version(2,4,0))
 494             {
 495                 if (window)
 496                     return gdk_display_get_default_cursor_size(gdk_drawable_get_display(window));
 497                 else
 498                     return gdk_display_get_default_cursor_size(gdk_display_get_default());
 499             }
 500             else
 501 #endif
 502                 return 16;
 503
 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
 518         case wxSYS_DRAG_X:
 519         case wxSYS_DRAG_Y:
 520             gint drag_threshold;
 521 #if GTK_CHECK_VERSION(2,2,0)
 522             if (window && !gtk_check_version(2,2,0))
 523             {
 524                 g_object_get(
 525                         gtk_settings_get_for_screen(gdk_drawable_get_screen(window)),
 526                         "gtk-dnd-drag-threshold",
 527                         &drag_threshold, NULL);
 528             }
 529             else
 530 #endif
 531             {
 532                 g_object_get(gtk_settings_get_default(),
 533                              "gtk-dnd-drag-threshold", &drag_threshold, NULL);
 534             }
 535
 536             return drag_threshold * 2;
 537
 538         // MBN: ditto for icons
 539         case wxSYS_ICON_X:     return 32;
 540         case wxSYS_ICON_Y:     return 32;
 541
 542         case wxSYS_SCREEN_X:
 543 #if GTK_CHECK_VERSION(2,2,0)
 544             if (window && !gtk_check_version(2,2,0))
 545                 return gdk_screen_get_width(gdk_drawable_get_screen(window));
 546             else
 547 #endif
 548                 return gdk_screen_width();
 549
 550         case wxSYS_SCREEN_Y:
 551 #if GTK_CHECK_VERSION(2,2,0)
 552             if (window && !gtk_check_version(2,2,0))
 553                 return gdk_screen_get_height(gdk_drawable_get_screen(window));
 554             else
 555 #endif
 556                 return gdk_screen_height();
 557
 558         case wxSYS_HSCROLL_Y:  return 15;
 559         case wxSYS_VSCROLL_X:  return 15;
 560
 561         case wxSYS_CAPTION_Y:
 562             if (!window)
 563                 // No realized window specified, and no implementation for that case yet.
 564                 return -1;
 565
 566             // Check if wm supports frame extents - we can't know the caption height if it does not.
 567 #if GTK_CHECK_VERSION(2,2,0)
 568             if (!gtk_check_version(2,2,0))
 569             {
 570                 if (!gdk_x11_screen_supports_net_wm_hint(
 571                         gdk_drawable_get_screen(window),
 572                         gdk_atom_intern("_NET_FRAME_EXTENTS", false) ) )
 573                     return -1;
 574             }
 575             else
 576 #endif
 577             {
 578                 if (!gdk_net_wm_supports(gdk_atom_intern("_NET_FRAME_EXTENTS", false)))
 579                     return -1;
 580             }
 581
 582             wxASSERT_MSG( wxDynamicCast(win, wxTopLevelWindow),
 583                           wxT("Asking for caption height of a non toplevel window") );
 584
 585             // Get the height of the top windowmanager border.
 586             // This is the titlebar in most cases. The titlebar might be elsewhere, and
 587             // we could check which is the thickest wm border to decide on which side the
 588             // titlebar is, but this might lead to interesting behaviours in used code.
 589             // Reconsider when we have a way to report to the user on which side it is.
 590
 591             Atom type;
 592             gint format;
 593             gulong nitems;
 594
 595 #if GTK_CHECK_VERSION(2,2,0)
 596             if (!gtk_check_version(2,2,0))
 597             {
 598                 gulong bytes_after;
 599                 success = (XGetWindowProperty (GDK_DISPLAY_XDISPLAY(gdk_drawable_get_display(window)),
 600                                     GDK_WINDOW_XWINDOW(window),
 601                                     gdk_x11_get_xatom_by_name_for_display (
 602                                             gdk_drawable_get_display(window),
 603                                             "_NET_FRAME_EXTENTS" ),
 604                                     0, // left, right, top, bottom, CARDINAL[4]/32
 605                                     G_MAXLONG, // size of long
 606                                     false, // do not delete property
 607                                     XA_CARDINAL, // 32 bit
 608                                     &type, &format, &nitems, &bytes_after, &data
 609                                    ) == Success);
 610             }
 611 #endif
 612             if (success)
 613             {
 614                 int caption_height = -1;
 615
 616                 if ((type == XA_CARDINAL) && (format == 32) && (nitems >= 3) && (data))
 617                 {
 618                     long *borders;
 619                     borders = (long*)data;
 620                     caption_height = borders[2]; // top frame extent
 621                 }
 622
 623                 if (data)
 624                     XFree(data);
 625
 626                 return caption_height;
 627             }
 628
 629             // Try a default approach without a window pointer, if possible
 630             // ...
 631
 632             return -1;
 633
 634         case wxSYS_PENWINDOWS_PRESENT:
 635             // No MS Windows for Pen computing extension available in X11 based gtk+.
 636             return 0;
 637
 638         default:
 639             return -1;   // metric is unknown
 640     }
 641 }
 642
 643 bool wxSystemSettingsNative::HasFeature(wxSystemFeature index)
 644 {
 645     switch (index)
 646     {
 647         case wxSYS_CAN_ICONIZE_FRAME:
 648             return false;
 649
 650         case wxSYS_CAN_DRAW_FRAME_DECORATIONS:
 651             return true;
 652
 653         default:
 654             return false;
 655     }
 656 }