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