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