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 #ifdef __WXGTK20__
 383         case wxSYS_BORDER_X:
 384         case wxSYS_BORDER_Y:
 385         case wxSYS_EDGE_X:
 386         case wxSYS_EDGE_Y:
 387         case wxSYS_FRAMESIZE_X:
 388         case wxSYS_FRAMESIZE_Y:
 389             // If a window is specified/realized, and it is a toplevel window, we can query from wm.
 390             // The returned border thickness is outside the client area in that case.
 391             if (window)
 392             {
 393                 wxTopLevelWindow *tlw = wxDynamicCast(win, wxTopLevelWindow);
 394                 if (!tlw)
 395                     return -1; // not a tlw, not sure how to approach
 396                 else
 397                 {
 398                     // Check if wm supports frame extents - we can't know
 399                     // the border widths if it does not.
 400 #if GTK_CHECK_VERSION(2,2,0)
 401                     if (!gtk_check_version(2,2,0))
 402                     {
 403                         if (!gdk_x11_screen_supports_net_wm_hint(
 404                                 gdk_drawable_get_screen(window),
 405                                 gdk_atom_intern("_NET_FRAME_EXTENTS", false) ) )
 406                             return -1;
 407                     }
 408                     else
 409 #endif
 410                     {
 411                         if (!gdk_net_wm_supports(gdk_atom_intern("_NET_FRAME_EXTENTS", false)))
 412                             return -1;
 413                     }
 414
 415                     // Get the frame extents from the windowmanager.
 416                     // In most cases the top extent is the titlebar, so we use the bottom extent
 417                     // for the heights.
 418
 419                     Atom type;
 420                     gint format;
 421                     gulong nitems;
 422                     gulong bytes_after;
 423
 424                     if (XGetWindowProperty (GDK_DISPLAY_XDISPLAY(gdk_drawable_get_display(window)),
 425                                             GDK_WINDOW_XWINDOW(window),
 426                                             gdk_x11_get_xatom_by_name_for_display (
 427                                                     gdk_drawable_get_display(window),
 428                                                     "_NET_FRAME_EXTENTS" ),
 429                                             0, // left, right, top, bottom, CARDINAL[4]/32
 430                                             G_MAXLONG, // size of long
 431                                             false, // do not delete property
 432                                             XA_CARDINAL, // 32 bit
 433                                             &type, &format, &nitems, &bytes_after, &data
 434                                            ) == Success)
 435                     {
 436                         int border_return = -1;
 437
 438                         if ((type == XA_CARDINAL) && (format == 32) && (nitems >= 4) && (data))
 439                         {
 440                             long *borders;
 441                             borders = (long*)data;
 442                             switch(index)
 443                             {
 444                                 case wxSYS_BORDER_X:
 445                                 case wxSYS_EDGE_X:
 446                                 case wxSYS_FRAMESIZE_X:
 447                                     border_return = borders[1]; // width of right extent
 448                                     break;
 449                                 default:
 450                                     border_return = borders[3]; // height of bottom extent
 451                                     break;
 452                             }
 453                         }
 454
 455                         if (data)
 456                             XFree(data);
 457
 458                         return border_return;
 459                     }
 460                 }
 461             }
 462
 463             return -1; // no window specified
 464 #endif // gtk2
 465
 466         case wxSYS_CURSOR_X:
 467         case wxSYS_CURSOR_Y:
 468 #ifdef __WXGTK24__
 469             if (!gtk_check_version(2,4,0))
 470             {
 471                 if (window)
 472                     return gdk_display_get_default_cursor_size(gdk_drawable_get_display(window));
 473                 else
 474                     return gdk_display_get_default_cursor_size(gdk_display_get_default());
 475             }
 476             else
 477 #endif
 478                 return 16;
 479
 480 #ifdef __WXGTK20__
 481         case wxSYS_DCLICK_X:
 482         case wxSYS_DCLICK_Y:
 483             gint dclick_distance;
 484 #if GTK_CHECK_VERSION(2,2,0)
 485             if (window && !gtk_check_version(2,2,0))
 486                 g_object_get(gtk_settings_get_for_screen(gdk_drawable_get_screen(window)),
 487                                 "gtk-double-click-distance", &dclick_distance, NULL);
 488             else
 489 #endif
 490                 g_object_get(gtk_settings_get_default(),
 491                                 "gtk-double-click-distance", &dclick_distance, NULL);
 492
 493             return dclick_distance * 2;
 494 #endif // gtk2
 495
 496 #ifdef __WXGTK20__
 497         case wxSYS_DRAG_X:
 498         case wxSYS_DRAG_Y:
 499             gint drag_threshold;
 500 #if GTK_CHECK_VERSION(2,2,0)
 501             if (window && !gtk_check_version(2,2,0))
 502             {
 503                 g_object_get(
 504                         gtk_settings_get_for_screen(gdk_drawable_get_screen(window)),
 505                         "gtk-dnd-drag-threshold",
 506                         &drag_threshold, NULL);
 507             }
 508             else
 509 #endif
 510             {
 511                 g_object_get(gtk_settings_get_default(),
 512                              "gtk-dnd-drag-threshold", &drag_threshold, NULL);
 513             }
 514
 515             return drag_threshold * 2;
 516 #endif
 517
 518         // MBN: ditto for icons
 519         case wxSYS_ICON_X:     return 32;
 520         case wxSYS_ICON_Y:     return 32;
 521
 522         case wxSYS_SCREEN_X:
 523 #if defined(__WXGTK20__) && GTK_CHECK_VERSION(2,2,0)
 524             if (window && !gtk_check_version(2,2,0))
 525                 return gdk_screen_get_width(gdk_drawable_get_screen(window));
 526             else
 527 #endif
 528                 return gdk_screen_width();
 529
 530         case wxSYS_SCREEN_Y:
 531 #if defined(__WXGTK20__) && GTK_CHECK_VERSION(2,2,0)
 532             if (window && !gtk_check_version(2,2,0))
 533                 return gdk_screen_get_height(gdk_drawable_get_screen(window));
 534             else
 535 #endif
 536                 return gdk_screen_height();
 537
 538         case wxSYS_HSCROLL_Y:  return 15;
 539         case wxSYS_VSCROLL_X:  return 15;
 540
 541 // a gtk1 implementation should be possible too if gtk2 efficiency/convenience functions aren't used
 542 #ifdef __WXGTK20__
 543         case wxSYS_CAPTION_Y:
 544             if (!window)
 545                 // No realized window specified, and no implementation for that case yet.
 546                 return -1;
 547
 548             // Check if wm supports frame extents - we can't know the caption height if it does not.
 549 #if GTK_CHECK_VERSION(2,2,0)
 550             if (!gtk_check_version(2,2,0))
 551             {
 552                 if (!gdk_x11_screen_supports_net_wm_hint(
 553                         gdk_drawable_get_screen(window),
 554                         gdk_atom_intern("_NET_FRAME_EXTENTS", false) ) )
 555                     return -1;
 556             }
 557             else
 558 #endif
 559             {
 560                 if (!gdk_net_wm_supports(gdk_atom_intern("_NET_FRAME_EXTENTS", false)))
 561                     return -1;
 562             }
 563
 564             wxASSERT_MSG( wxDynamicCast(win, wxTopLevelWindow),
 565                           wxT("Asking for caption height of a non toplevel window") );
 566
 567             // Get the height of the top windowmanager border.
 568             // This is the titlebar in most cases. The titlebar might be elsewhere, and
 569             // we could check which is the thickest wm border to decide on which side the
 570             // titlebar is, but this might lead to interesting behaviours in used code.
 571             // Reconsider when we have a way to report to the user on which side it is.
 572
 573             Atom type;
 574             gint format;
 575             gulong nitems;
 576             gulong bytes_after;
 577
 578             if (XGetWindowProperty (GDK_DISPLAY_XDISPLAY(gdk_drawable_get_display(window)),
 579                                     GDK_WINDOW_XWINDOW(window),
 580                                     gdk_x11_get_xatom_by_name_for_display (
 581                                             gdk_drawable_get_display(window),
 582                                             "_NET_FRAME_EXTENTS" ),
 583                                     0, // left, right, top, bottom, CARDINAL[4]/32
 584                                     G_MAXLONG, // size of long
 585                                     false, // do not delete property
 586                                     XA_CARDINAL, // 32 bit
 587                                     &type, &format, &nitems, &bytes_after, &data
 588                                    ) == Success)
 589             {
 590                 int caption_height = -1;
 591
 592                 if ((type == XA_CARDINAL) && (format == 32) && (nitems >= 3) && (data))
 593                 {
 594                     long *borders;
 595                     borders = (long*)data;
 596                     caption_height = borders[2]; // top frame extent
 597                 }
 598
 599                 if (data)
 600                     XFree(data);
 601
 602                 return caption_height;
 603             }
 604
 605             // Try a default approach without a window pointer, if possible
 606             // ...
 607
 608             return -1;
 609 #endif // gtk2
 610
 611         case wxSYS_PENWINDOWS_PRESENT:
 612             // No MS Windows for Pen computing extension available in X11 based gtk+.
 613             return 0;
 614
 615         default:
 616             return -1;   // metric is unknown
 617     }
 618 }
 619
 620 bool wxSystemSettingsNative::HasFeature(wxSystemFeature index)
 621 {
 622     switch (index)
 623     {
 624         case wxSYS_CAN_ICONIZE_FRAME:
 625             return FALSE;
 626             break;
 627         case wxSYS_CAN_DRAW_FRAME_DECORATIONS:
 628             return TRUE;
 629             break;
 630         default:
 631             return FALSE;
 632     }
 633 }