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     guchar *data = NULL;
 375     GdkWindow *window = NULL;
 376     if(win && GTK_WIDGET_REALIZED(win->GetHandle()))
 377         window = win->GetHandle()->window;
 378 #endif
 379
 380     switch (index)
 381     {
 382         case wxSYS_BORDER_X:
 383         case wxSYS_BORDER_Y:
 384         case wxSYS_EDGE_X:
 385         case wxSYS_EDGE_Y:
 386         case wxSYS_FRAMESIZE_X:
 387         case wxSYS_FRAMESIZE_Y:
 388             // If a window is specified/realized, and it is a toplevel window, we can query from wm.
 389             // The returned border thickness is outside the client area in that case.
 390             if (window)
 391             {
 392                 wxTopLevelWindow *tlw = wxDynamicCast(win, wxTopLevelWindow);
 393                 if (!tlw)
 394                     return -1; // not a tlw, not sure how to approach
 395                 else
 396                 {
 397                     // Check if wm supports frame extents - we can't know
 398                     // the border widths if it does not.
 399 #if GTK_CHECK_VERSION(2,2,0)
 400                     if (!gtk_check_version(2,2,0))
 401                     {
 402                         if (!gdk_x11_screen_supports_net_wm_hint(
 403                                 gdk_drawable_get_screen(window),
 404                                 gdk_atom_intern("_NET_FRAME_EXTENTS", false) ) )
 405                             return -1;
 406                     }
 407                     else
 408 #endif
 409                     {
 410                         if (!gdk_net_wm_supports(gdk_atom_intern("_NET_FRAME_EXTENTS", false)))
 411                             return -1;
 412                     }
 413
 414                     // Get the frame extents from the windowmanager.
 415                     // In most cases the top extent is the titlebar, so we use the bottom extent
 416                     // for the heights.
 417
 418                     Atom type;
 419                     gint format;
 420                     gulong nitems;
 421                     gulong bytes_after;
 422
 423                     if (XGetWindowProperty (GDK_DISPLAY_XDISPLAY(gdk_drawable_get_display(window)),
 424                                             GDK_WINDOW_XWINDOW(window),
 425                                             gdk_x11_get_xatom_by_name_for_display (
 426                                                     gdk_drawable_get_display(window),
 427                                                     "_NET_FRAME_EXTENTS" ),
 428                                             0, // left, right, top, bottom, CARDINAL[4]/32
 429                                             G_MAXLONG, // size of long
 430                                             false, // do not delete property
 431                                             XA_CARDINAL, // 32 bit
 432                                             &type, &format, &nitems, &bytes_after, &data
 433                                            ) == Success)
 434                     {
 435                         int border_return = -1;
 436
 437                         if ((type == XA_CARDINAL) && (format == 32) && (nitems >= 4) && (data))
 438                         {
 439                             long *borders;
 440                             borders = (long*)data;
 441                             switch(index)
 442                             {
 443                                 case wxSYS_BORDER_X:
 444                                 case wxSYS_EDGE_X:
 445                                 case wxSYS_FRAMESIZE_X:
 446                                     border_return = borders[1]; // width of right extent
 447                                     break;
 448                                 default:
 449                                     border_return = borders[3]; // height of bottom extent
 450                                     break;
 451                             }
 452                         }
 453
 454                         if (data)
 455                             XFree(data);
 456
 457                         return border_return;
 458                     }
 459                 }
 460             }
 461
 462             return -1; // no window specified
 463
 464         case wxSYS_CURSOR_X:
 465         case wxSYS_CURSOR_Y:
 466 #ifdef __WXGTK24__
 467             if (!gtk_check_version(2,4,0))
 468             {
 469                 if (window)
 470                     return gdk_display_get_default_cursor_size(gdk_drawable_get_display(window));
 471                 else
 472                     return gdk_display_get_default_cursor_size(gdk_display_get_default());
 473             }
 474             else
 475 #endif
 476                 return 16;
 477
 478 #ifdef __WXGTK20__
 479         case wxSYS_DCLICK_X:
 480         case wxSYS_DCLICK_Y:
 481             gint dclick_distance;
 482 #if GTK_CHECK_VERSION(2,2,0)
 483             if (window && !gtk_check_version(2,2,0))
 484                 g_object_get(gtk_settings_get_for_screen(gdk_drawable_get_screen(window)),
 485                                 "gtk-double-click-distance", &dclick_distance, NULL);
 486             else
 487 #endif
 488                 g_object_get(gtk_settings_get_default(),
 489                                 "gtk-double-click-distance", &dclick_distance, NULL);
 490
 491             return dclick_distance * 2;
 492 #endif // gtk2
 493
 494 #ifdef __WXGTK20__
 495         case wxSYS_DRAG_X:
 496         case wxSYS_DRAG_Y:
 497             gint drag_threshold;
 498 #if GTK_CHECK_VERSION(2,2,0)
 499             if (window && !gtk_check_version(2,2,0))
 500             {
 501                 g_object_get(
 502                         gtk_settings_get_for_screen(gdk_drawable_get_screen(window)),
 503                         "gtk-dnd-drag-threshold",
 504                         &drag_threshold, NULL);
 505             }
 506             else
 507 #endif
 508             {
 509                 g_object_get(gtk_settings_get_default(),
 510                              "gtk-dnd-drag-threshold", &drag_threshold, NULL);
 511             }
 512
 513             return drag_threshold * 2;
 514 #endif
 515
 516         // MBN: ditto for icons
 517         case wxSYS_ICON_X:     return 32;
 518         case wxSYS_ICON_Y:     return 32;
 519
 520         case wxSYS_SCREEN_X:
 521 #if defined(__WXGTK20__) && GTK_CHECK_VERSION(2,2,0)
 522             if (window && !gtk_check_version(2,2,0))
 523                 return gdk_screen_get_width(gdk_drawable_get_screen(window));
 524             else
 525 #endif
 526                 return gdk_screen_width();
 527
 528         case wxSYS_SCREEN_Y:
 529 #if defined(__WXGTK20__) && GTK_CHECK_VERSION(2,2,0)
 530             if (window && !gtk_check_version(2,2,0))
 531                 return gdk_screen_get_height(gdk_drawable_get_screen(window));
 532             else
 533 #endif
 534                 return gdk_screen_height();
 535
 536         case wxSYS_HSCROLL_Y:  return 15;
 537         case wxSYS_VSCROLL_X:  return 15;
 538
 539 // a gtk1 implementation should be possible too if gtk2 efficiency/convenience functions aren't used
 540 #ifdef __WXGTK20__
 541         case wxSYS_CAPTION_Y:
 542             if (!window)
 543                 // No realized window specified, and no implementation for that case yet.
 544                 return -1;
 545
 546             // Check if wm supports frame extents - we can't know the caption height if it does not.
 547 #if GTK_CHECK_VERSION(2,2,0)
 548             if (!gtk_check_version(2,2,0))
 549             {
 550                 if (!gdk_x11_screen_supports_net_wm_hint(
 551                         gdk_drawable_get_screen(window),
 552                         gdk_atom_intern("_NET_FRAME_EXTENTS", false) ) )
 553                     return -1;
 554             }
 555             else
 556 #endif
 557             {
 558                 if (!gdk_net_wm_supports(gdk_atom_intern("_NET_FRAME_EXTENTS", false)))
 559                     return -1;
 560             }
 561
 562             wxASSERT_MSG( wxDynamicCast(win, wxTopLevelWindow),
 563                           wxT("Asking for caption height of a non toplevel window") );
 564
 565             // Get the height of the top windowmanager border.
 566             // This is the titlebar in most cases. The titlebar might be elsewhere, and
 567             // we could check which is the thickest wm border to decide on which side the
 568             // titlebar is, but this might lead to interesting behaviours in used code.
 569             // Reconsider when we have a way to report to the user on which side it is.
 570
 571             Atom type;
 572             gint format;
 573             gulong nitems;
 574             gulong bytes_after;
 575
 576             if (XGetWindowProperty (GDK_DISPLAY_XDISPLAY(gdk_drawable_get_display(window)),
 577                                     GDK_WINDOW_XWINDOW(window),
 578                                     gdk_x11_get_xatom_by_name_for_display (
 579                                             gdk_drawable_get_display(window),
 580                                             "_NET_FRAME_EXTENTS" ),
 581                                     0, // left, right, top, bottom, CARDINAL[4]/32
 582                                     G_MAXLONG, // size of long
 583                                     false, // do not delete property
 584                                     XA_CARDINAL, // 32 bit
 585                                     &type, &format, &nitems, &bytes_after, &data
 586                                    ) == Success)
 587             {
 588                 int caption_height = -1;
 589
 590                 if ((type == XA_CARDINAL) && (format == 32) && (nitems >= 3) && (data))
 591                 {
 592                     long *borders;
 593                     borders = (long*)data;
 594                     caption_height = borders[2]; // top frame extent
 595                 }
 596
 597                 if (data)
 598                     XFree(data);
 599
 600                 return caption_height;
 601             }
 602
 603             // Try a default approach without a window pointer, if possible
 604             // ...
 605
 606             return -1;
 607 #endif // gtk2
 608
 609         case wxSYS_PENWINDOWS_PRESENT:
 610             // No MS Windows for Pen computing extension available in X11 based gtk+.
 611             return 0;
 612
 613         default:
 614             return -1;   // metric is unknown
 615     }
 616 }
 617
 618 bool wxSystemSettingsNative::HasFeature(wxSystemFeature index)
 619 {
 620     switch (index)
 621     {
 622         case wxSYS_CAN_ICONIZE_FRAME:
 623             return FALSE;
 624             break;
 625         case wxSYS_CAN_DRAW_FRAME_DECORATIONS:
 626             return TRUE;
 627             break;
 628         default:
 629             return FALSE;
 630     }
 631 }