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