src/gtk/settings.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk/settings.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Modified by: Mart Raudsepp (GetMetric)
   6 // Id:          $Id$
   7 // Copyright:   (c) 1998 Robert Roebling
   8 // Licence:     wxWindows licence
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11 // For compilers that support precompilation, includes "wx.h".
  12 #include "wx/wxprec.h"
  13
  14 #include "wx/settings.h"
  15
  16 #ifndef WX_PRECOMP
  17     #include "wx/cmndata.h"
  18     #include "wx/toplevel.h"
  19 #endif
  20
  21 #include "wx/fontutil.h"
  22
  23 #include <gtk/gtkversion.h>
  24 #if GTK_CHECK_VERSION(2, 9, 0)
  25     // gtk_object_sink
  26     #undef GTK_DISABLE_DEPRECATED
  27 #endif
  28 #include <gtk/gtk.h>
  29
  30 bool wxGetFrameExtents(GdkWindow* window, int* left, int* right, int* top, int* bottom);
  31
  32 // ----------------------------------------------------------------------------
  33 // wxSystemObjects
  34 // ----------------------------------------------------------------------------
  35
  36 struct wxSystemObjects
  37 {
  38     wxColour m_colBtnFace,
  39              m_colBtnShadow,
  40              m_colBtnHighlight,
  41              m_colHighlight,
  42              m_colHighlightText,
  43              m_colListBox,
  44              m_colWindow,
  45              m_colWindowText,
  46              m_colBtnText,
  47              m_colMenuItemHighlight,
  48              m_colTooltip,
  49              m_colTooltipText,
  50              m_colMenubarBg;
  51
  52     wxFont m_fontSystem;
  53 };
  54
  55 static wxSystemObjects gs_objects;
  56
  57 void wxClearGtkSystemObjects()
  58 {
  59     gs_objects.m_colBtnFace = wxColour();
  60     gs_objects.m_colBtnShadow = wxColour();
  61     gs_objects.m_colBtnHighlight = wxColour();
  62     gs_objects.m_colHighlightText = wxColour();
  63     gs_objects.m_colListBox = wxColour();
  64     gs_objects.m_colWindow = wxColour();
  65     gs_objects.m_colWindowText = wxColour();
  66     gs_objects.m_colBtnText = wxColour();
  67     gs_objects.m_colMenuItemHighlight = wxColour();
  68     gs_objects.m_colTooltip = wxColour();
  69     gs_objects.m_colTooltipText = wxColour();
  70     gs_objects.m_colMenubarBg = wxColour();
  71     gs_objects.m_fontSystem = wxNullFont;
  72 }
  73
  74 // ----------------------------------------------------------------------------
  75 // wxSystemSettings implementation
  76 // ----------------------------------------------------------------------------
  77
  78 // kind of widget to use in GetColourFromGTKWidget
  79 enum wxGtkWidgetType
  80 {
  81     wxGTK_BUTTON,
  82     wxGTK_LIST,
  83     wxGTK_MENUITEM,
  84     wxGTK_TEXTCTRL,
  85     wxGTK_MENUBAR,
  86 };
  87
  88 // the colour we need
  89 enum wxGtkColourType
  90 {
  91     wxGTK_FG,
  92     wxGTK_BG,
  93     wxGTK_TEXT,
  94     wxGTK_BASE
  95 };
  96
  97 // wxSystemSettings::GetColour() helper: get the colours from a GTK+
  98 // widget style, return true if we did get them
  99 static bool GetColourFromGTKWidget(GdkColor& gdkColor,
 100                                    wxGtkWidgetType type = wxGTK_BUTTON,
 101                                    GtkStateType state = GTK_STATE_NORMAL,
 102                                    wxGtkColourType colour = wxGTK_BG)
 103 {
 104     GtkWidget *widget;
 105     switch ( type )
 106     {
 107         default:
 108             wxFAIL_MSG( _T("unexpected GTK widget type") );
 109             // fall through
 110
 111         case wxGTK_BUTTON:
 112             widget = gtk_button_new();
 113             break;
 114
 115         case wxGTK_TEXTCTRL:
 116             widget = gtk_text_view_new();
 117             break;
 118
 119         case wxGTK_LIST:
 120             widget = gtk_tree_view_new_with_model(
 121                 (GtkTreeModel*)gtk_list_store_new(1, G_TYPE_INT));
 122             break;
 123
 124         case wxGTK_MENUITEM:
 125             widget = gtk_menu_item_new();
 126             break;
 127
 128         case wxGTK_MENUBAR:
 129             widget = gtk_menu_bar_new();
 130             break;
 131     }
 132
 133     GtkStyle *def = gtk_rc_get_style( widget );
 134     if ( !def )
 135         def = gtk_widget_get_default_style();
 136
 137     const bool ok = def != NULL;
 138     if (ok)
 139     {
 140         switch ( colour )
 141         {
 142             default:
 143                 wxFAIL_MSG( _T("unexpected GTK colour type") );
 144                 // fall through
 145
 146             case wxGTK_FG:
 147                 gdkColor = def->fg[state];
 148                 break;
 149
 150             case wxGTK_BG:
 151                 gdkColor = def->bg[state];
 152                 break;
 153
 154             case wxGTK_TEXT:
 155                 gdkColor = def->text[state];
 156                 break;
 157
 158             case wxGTK_BASE:
 159                 gdkColor = def->base[state];
 160                 break;
 161         }
 162     }
 163
 164     gtk_object_sink((GtkObject*)widget);
 165
 166     return ok;
 167 }
 168
 169 static void GetTooltipColors()
 170 {
 171     GtkWidget* widget = gtk_window_new(GTK_WINDOW_POPUP);
 172     const char* name = "gtk-tooltip";
 173     if (gtk_check_version(2, 11, 0))
 174         name = "gtk-tooltips";
 175     gtk_widget_set_name(widget, name);
 176     gtk_widget_ensure_style(widget);
 177
 178     GdkColor c = widget->style->bg[GTK_STATE_NORMAL];
 179     gs_objects.m_colTooltip = wxColor(c);
 180     c = widget->style->fg[GTK_STATE_NORMAL];
 181     gs_objects.m_colTooltipText = wxColor(c);
 182
 183     gtk_widget_destroy(widget);
 184 }
 185
 186 wxColour wxSystemSettingsNative::GetColour( wxSystemColour index )
 187 {
 188     wxColor color;
 189     GdkColor gdkColor;
 190     switch (index)
 191     {
 192         case wxSYS_COLOUR_SCROLLBAR:
 193         case wxSYS_COLOUR_BACKGROUND:
 194         case wxSYS_COLOUR_INACTIVECAPTION:
 195         case wxSYS_COLOUR_MENU:
 196         case wxSYS_COLOUR_WINDOWFRAME:
 197         case wxSYS_COLOUR_ACTIVEBORDER:
 198         case wxSYS_COLOUR_INACTIVEBORDER:
 199         case wxSYS_COLOUR_BTNFACE:
 200         case wxSYS_COLOUR_3DLIGHT:
 201             if (!gs_objects.m_colBtnFace.Ok())
 202             {
 203                 gdkColor.red =
 204                 gdkColor.green = 0;
 205                 gdkColor.blue = 0x9c40;
 206                 GetColourFromGTKWidget(gdkColor);
 207                 gs_objects.m_colBtnFace = wxColor(gdkColor);
 208             }
 209             color = gs_objects.m_colBtnFace;
 210             break;
 211
 212         case wxSYS_COLOUR_WINDOW:
 213             if (!gs_objects.m_colWindow.Ok())
 214             {
 215                 gdkColor.red =
 216                 gdkColor.green =
 217                 gdkColor.blue = 0xFFFF;
 218                 GetColourFromGTKWidget(gdkColor, wxGTK_TEXTCTRL, GTK_STATE_NORMAL, wxGTK_BASE);
 219                 gs_objects.m_colWindow = wxColor(gdkColor);
 220             }
 221             color = gs_objects.m_colWindow;
 222             break;
 223
 224
 225         case wxSYS_COLOUR_MENUBAR:
 226             if (!gs_objects.m_colMenubarBg.Ok())
 227             {
 228                 gdkColor.red =
 229                 gdkColor.green = 0;
 230                 gdkColor.blue = 0x9c40;
 231                 GetColourFromGTKWidget(gdkColor,wxGTK_MENUBAR);
 232                 gs_objects.m_colMenubarBg = wxColor(gdkColor);
 233             }
 234             color = gs_objects.m_colMenubarBg;
 235             break;
 236
 237         case wxSYS_COLOUR_3DDKSHADOW:
 238             color = *wxBLACK;
 239             break;
 240
 241         case wxSYS_COLOUR_GRAYTEXT:
 242         case wxSYS_COLOUR_BTNSHADOW:
 243         //case wxSYS_COLOUR_3DSHADOW:
 244             if (!gs_objects.m_colBtnShadow.Ok())
 245             {
 246                 wxColour faceColour(GetColour(wxSYS_COLOUR_3DFACE));
 247                 gs_objects.m_colBtnShadow =
 248                    wxColour((unsigned char) (faceColour.Red() * 2 / 3),
 249                             (unsigned char) (faceColour.Green() * 2 / 3),
 250                             (unsigned char) (faceColour.Blue() * 2 / 3));
 251             }
 252             color = gs_objects.m_colBtnShadow;
 253             break;
 254
 255         case wxSYS_COLOUR_3DHIGHLIGHT:
 256         //case wxSYS_COLOUR_BTNHIGHLIGHT:
 257             color = *wxWHITE;
 258             break;
 259
 260         case wxSYS_COLOUR_HIGHLIGHT:
 261             if (!gs_objects.m_colHighlight.Ok())
 262             {
 263                 gdkColor.red =
 264                 gdkColor.green = 0;
 265                 gdkColor.blue = 0x9c40;
 266                 GetColourFromGTKWidget(
 267                     gdkColor, wxGTK_BUTTON, GTK_STATE_SELECTED);
 268                 gs_objects.m_colHighlight = wxColour(gdkColor);
 269             }
 270             color = gs_objects.m_colHighlight;
 271             break;
 272
 273         case wxSYS_COLOUR_LISTBOX:
 274             if (!gs_objects.m_colListBox.Ok())
 275             {
 276                 if ( GetColourFromGTKWidget(gdkColor,
 277                                             wxGTK_LIST,
 278                                             GTK_STATE_NORMAL,
 279                                             wxGTK_BASE) )
 280                 {
 281                     gs_objects.m_colListBox = wxColour(gdkColor);
 282                 }
 283                 else
 284                 {
 285                     gs_objects.m_colListBox = *wxWHITE;
 286                 }
 287             }
 288             color = gs_objects.m_colListBox;
 289             break;
 290
 291         case wxSYS_COLOUR_MENUTEXT:
 292         case wxSYS_COLOUR_WINDOWTEXT:
 293         case wxSYS_COLOUR_CAPTIONTEXT:
 294         case wxSYS_COLOUR_INACTIVECAPTIONTEXT:
 295         case wxSYS_COLOUR_BTNTEXT:
 296             if (!gs_objects.m_colBtnText.Ok())
 297             {
 298                 gdkColor.red =
 299                 gdkColor.green =
 300                 gdkColor.blue = 0;
 301                 GetColourFromGTKWidget(
 302                     gdkColor, wxGTK_BUTTON, GTK_STATE_NORMAL, wxGTK_FG);
 303                 gs_objects.m_colBtnText = wxColour(gdkColor);
 304             }
 305             color = gs_objects.m_colBtnText;
 306             break;
 307
 308         case wxSYS_COLOUR_INFOBK:
 309             if (!gs_objects.m_colTooltip.Ok()) {
 310                 GetTooltipColors();
 311             }
 312             color = gs_objects.m_colTooltip;
 313             break;
 314
 315         case wxSYS_COLOUR_INFOTEXT:
 316             if (!gs_objects.m_colTooltipText.Ok()) {
 317                 GetTooltipColors();
 318             }
 319             color = gs_objects.m_colTooltipText;
 320             break;
 321
 322         case wxSYS_COLOUR_HIGHLIGHTTEXT:
 323             if (!gs_objects.m_colHighlightText.Ok())
 324             {
 325                 gdkColor.red =
 326                 gdkColor.green =
 327                 gdkColor.blue = 0;
 328                 GetColourFromGTKWidget(
 329                     gdkColor, wxGTK_BUTTON, GTK_STATE_SELECTED, wxGTK_TEXT);
 330                 gs_objects.m_colHighlightText = wxColour(gdkColor);
 331             }
 332             color = gs_objects.m_colHighlightText;
 333             break;
 334
 335         case wxSYS_COLOUR_APPWORKSPACE:
 336             color = *wxWHITE;    // ?
 337             break;
 338
 339         case wxSYS_COLOUR_ACTIVECAPTION:
 340         case wxSYS_COLOUR_MENUHILIGHT:
 341             if (!gs_objects.m_colMenuItemHighlight.Ok())
 342             {
 343                 gdkColor.red =
 344                 gdkColor.green =
 345                 gdkColor.blue = 0;
 346                 GetColourFromGTKWidget(
 347                     gdkColor, wxGTK_MENUITEM, GTK_STATE_SELECTED, wxGTK_BG);
 348                 gs_objects.m_colMenuItemHighlight = wxColour(gdkColor);
 349             }
 350             color = gs_objects.m_colMenuItemHighlight;
 351             break;
 352
 353         case wxSYS_COLOUR_HOTLIGHT:
 354         case wxSYS_COLOUR_GRADIENTACTIVECAPTION:
 355         case wxSYS_COLOUR_GRADIENTINACTIVECAPTION:
 356             // TODO
 357             color = *wxBLACK;
 358             break;
 359
 360         case wxSYS_COLOUR_MAX:
 361         default:
 362             wxFAIL_MSG( _T("unknown system colour index") );
 363             color = *wxWHITE;
 364             break;
 365     }
 366
 367     return color;
 368 }
 369
 370 wxFont wxSystemSettingsNative::GetFont( wxSystemFont index )
 371 {
 372     wxFont font;
 373     switch (index)
 374     {
 375         case wxSYS_OEM_FIXED_FONT:
 376         case wxSYS_ANSI_FIXED_FONT:
 377         case wxSYS_SYSTEM_FIXED_FONT:
 378             font = *wxNORMAL_FONT;
 379             break;
 380
 381         case wxSYS_ANSI_VAR_FONT:
 382         case wxSYS_SYSTEM_FONT:
 383         case wxSYS_DEVICE_DEFAULT_FONT:
 384         case wxSYS_DEFAULT_GUI_FONT:
 385             if (!gs_objects.m_fontSystem.Ok())
 386             {
 387                 GtkWidget *widget = gtk_button_new();
 388                 GtkStyle *def = gtk_rc_get_style( widget );
 389                 if ( !def || !def->font_desc )
 390                     def = gtk_widget_get_default_style();
 391                 if ( def && def->font_desc )
 392                 {
 393                     wxNativeFontInfo info;
 394                     info.description =
 395                         pango_font_description_copy(def->font_desc);
 396                     gs_objects.m_fontSystem = wxFont(info);
 397                 }
 398                 else
 399                 {
 400                     GtkSettings *settings = gtk_settings_get_default();
 401                     gchar *font_name = NULL;
 402                     g_object_get ( settings,
 403                                    "gtk-font-name",
 404                                    &font_name,
 405                                    NULL);
 406                     if (!font_name)
 407                         gs_objects.m_fontSystem = wxFont( 12, wxSWISS, wxNORMAL, wxNORMAL );
 408                     else
 409                         gs_objects.m_fontSystem = wxFont(wxString::FromAscii(font_name));
 410                     g_free (font_name);
 411                 }
 412                 gtk_object_sink((GtkObject*)widget);
 413             }
 414             font = gs_objects.m_fontSystem;
 415             break;
 416
 417         default:
 418             break;
 419     }
 420     return font;
 421 }
 422
 423 // helper: return the GtkSettings either for the screen the current window is
 424 // on or for the default screen if window is NULL
 425 static GtkSettings *GetSettingsForWindowScreen(GdkWindow *window)
 426 {
 427     return window ? gtk_settings_get_for_screen(gdk_drawable_get_screen(window))
 428                   : gtk_settings_get_default();
 429 }
 430
 431 int wxSystemSettingsNative::GetMetric( wxSystemMetric index, wxWindow* win )
 432 {
 433     GdkWindow *window = NULL;
 434     if(win && GTK_WIDGET_REALIZED(win->GetHandle()))
 435         window = win->GetHandle()->window;
 436
 437     switch (index)
 438     {
 439         case wxSYS_BORDER_X:
 440         case wxSYS_BORDER_Y:
 441         case wxSYS_EDGE_X:
 442         case wxSYS_EDGE_Y:
 443         case wxSYS_FRAMESIZE_X:
 444         case wxSYS_FRAMESIZE_Y:
 445             // If a window is specified/realized, and it is a toplevel window, we can query from wm.
 446             // The returned border thickness is outside the client area in that case.
 447             if (window)
 448             {
 449                 wxTopLevelWindow *tlw = wxDynamicCast(win, wxTopLevelWindow);
 450                 if (!tlw)
 451                     return -1; // not a tlw, not sure how to approach
 452                 else
 453                 {
 454                     // Get the frame extents from the windowmanager.
 455                     // In most cases the top extent is the titlebar, so we use the bottom extent
 456                     // for the heights.
 457                     int right, bottom;
 458                     if (wxGetFrameExtents(window, NULL, &right, NULL, &bottom))
 459                     {
 460                         switch (index)
 461                         {
 462                             case wxSYS_BORDER_X:
 463                             case wxSYS_EDGE_X:
 464                             case wxSYS_FRAMESIZE_X:
 465                                 return right; // width of right extent
 466                             default:
 467                                 return bottom; // height of bottom extent
 468                         }
 469                     }
 470                 }
 471             }
 472
 473             return -1; // no window specified
 474
 475         case wxSYS_CURSOR_X:
 476         case wxSYS_CURSOR_Y:
 477                 return gdk_display_get_default_cursor_size(
 478                             window ? gdk_drawable_get_display(window)
 479                                    : gdk_display_get_default());
 480
 481         case wxSYS_DCLICK_X:
 482         case wxSYS_DCLICK_Y:
 483             gint dclick_distance;
 484             g_object_get(GetSettingsForWindowScreen(window),
 485                             "gtk-double-click-distance", &dclick_distance, NULL);
 486
 487             return dclick_distance * 2;
 488
 489         case wxSYS_DCLICK_MSEC:
 490             gint dclick;
 491             g_object_get(GetSettingsForWindowScreen(window),
 492                             "gtk-double-click-time", &dclick, NULL);
 493             return dclick;
 494
 495         case wxSYS_DRAG_X:
 496         case wxSYS_DRAG_Y:
 497             gint drag_threshold;
 498             g_object_get(GetSettingsForWindowScreen(window),
 499                             "gtk-dnd-drag-threshold", &drag_threshold, NULL);
 500
 501             // The correct thing here would be to double the value
 502             // since that is what the API wants. But the values
 503             // are much bigger under GNOME than under Windows and
 504             // just seem to much in many cases to be useful.
 505             // drag_threshold *= 2;
 506
 507             return drag_threshold;
 508
 509         case wxSYS_ICON_X:
 510         case wxSYS_ICON_Y:
 511             return 32;
 512
 513         case wxSYS_SCREEN_X:
 514             if (window)
 515                 return gdk_screen_get_width(gdk_drawable_get_screen(window));
 516             else
 517                 return gdk_screen_width();
 518
 519         case wxSYS_SCREEN_Y:
 520             if (window)
 521                 return gdk_screen_get_height(gdk_drawable_get_screen(window));
 522             else
 523                 return gdk_screen_height();
 524
 525         case wxSYS_HSCROLL_Y:
 526         case wxSYS_VSCROLL_X:
 527             return 15;
 528
 529         case wxSYS_CAPTION_Y:
 530             if (!window)
 531                 // No realized window specified, and no implementation for that case yet.
 532                 return -1;
 533
 534             wxASSERT_MSG( wxDynamicCast(win, wxTopLevelWindow),
 535                           wxT("Asking for caption height of a non toplevel window") );
 536
 537             // Get the height of the top windowmanager border.
 538             // This is the titlebar in most cases. The titlebar might be elsewhere, and
 539             // we could check which is the thickest wm border to decide on which side the
 540             // titlebar is, but this might lead to interesting behaviours in used code.
 541             // Reconsider when we have a way to report to the user on which side it is.
 542             {
 543                 int top;
 544                 if (wxGetFrameExtents(window, NULL, NULL, &top, NULL))
 545                 {
 546                     return top; // top frame extent
 547                 }
 548             }
 549
 550             // Try a default approach without a window pointer, if possible
 551             // ...
 552
 553             return -1;
 554
 555         case wxSYS_PENWINDOWS_PRESENT:
 556             // No MS Windows for Pen computing extension available in X11 based gtk+.
 557             return 0;
 558
 559         default:
 560             return -1;   // metric is unknown
 561     }
 562 }
 563
 564 bool wxSystemSettingsNative::HasFeature(wxSystemFeature index)
 565 {
 566     switch (index)
 567     {
 568         case wxSYS_CAN_ICONIZE_FRAME:
 569             return false;
 570
 571         case wxSYS_CAN_DRAW_FRAME_DECORATIONS:
 572             return true;
 573
 574         default:
 575             return false;
 576     }
 577 }