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/toplevel.h"
  18 #endif
  19
  20 #include "wx/fontutil.h"
  21 #include "wx/fontenum.h"
  22
  23 #include <gtk/gtk.h>
  24 #include "wx/gtk/private/win_gtk.h"
  25
  26 bool wxGetFrameExtents(GdkWindow* window, int* left, int* right, int* top, int* bottom);
  27
  28 // ----------------------------------------------------------------------------
  29 // wxSystemSettings implementation
  30 // ----------------------------------------------------------------------------
  31
  32 static wxFont gs_fontSystem;
  33
  34 static GtkContainer* ContainerWidget()
  35 {
  36     static GtkContainer* s_widget;
  37     if (s_widget == NULL)
  38     {
  39         s_widget = GTK_CONTAINER(gtk_fixed_new());
  40         GtkWidget* window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
  41         gtk_container_add(GTK_CONTAINER(window), GTK_WIDGET(s_widget));
  42     }
  43     return s_widget;
  44 }
  45
  46 extern "C" {
  47 static void style_set(GtkWidget*, GtkStyle*, void*)
  48 {
  49     gs_fontSystem = wxNullFont;
  50 }
  51 }
  52
  53 static const GtkStyle* ButtonStyle()
  54 {
  55     static GtkWidget* s_widget;
  56     if (s_widget == NULL)
  57     {
  58         s_widget = gtk_button_new();
  59         gtk_container_add(ContainerWidget(), s_widget);
  60         gtk_widget_ensure_style(s_widget);
  61         g_signal_connect(s_widget, "style_set", G_CALLBACK(style_set), NULL);
  62     }
  63     return s_widget->style;
  64 }
  65
  66 static const GtkStyle* ListStyle()
  67 {
  68     static GtkWidget* s_widget;
  69     if (s_widget == NULL)
  70     {
  71         s_widget = gtk_tree_view_new_with_model(
  72             GTK_TREE_MODEL(gtk_list_store_new(1, G_TYPE_INT)));
  73         gtk_container_add(ContainerWidget(), s_widget);
  74         gtk_widget_ensure_style(s_widget);
  75     }
  76     return s_widget->style;
  77 }
  78
  79 static const GtkStyle* TextCtrlStyle()
  80 {
  81     static GtkWidget* s_widget;
  82     if (s_widget == NULL)
  83     {
  84         s_widget = gtk_text_view_new();
  85         gtk_container_add(ContainerWidget(), s_widget);
  86         gtk_widget_ensure_style(s_widget);
  87     }
  88     return s_widget->style;
  89 }
  90
  91 static const GtkStyle* MenuItemStyle()
  92 {
  93     static GtkWidget* s_widget;
  94     if (s_widget == NULL)
  95     {
  96         s_widget = gtk_menu_item_new();
  97         gtk_container_add(ContainerWidget(), s_widget);
  98         gtk_widget_ensure_style(s_widget);
  99     }
 100     return s_widget->style;
 101 }
 102
 103 static const GtkStyle* MenuBarStyle()
 104 {
 105     static GtkWidget* s_widget;
 106     if (s_widget == NULL)
 107     {
 108         s_widget = gtk_menu_bar_new();
 109         gtk_container_add(ContainerWidget(), s_widget);
 110         gtk_widget_ensure_style(s_widget);
 111     }
 112     return s_widget->style;
 113 }
 114
 115 static const GtkStyle* ToolTipStyle()
 116 {
 117     static GtkWidget* s_widget;
 118     if (s_widget == NULL)
 119     {
 120         s_widget = gtk_window_new(GTK_WINDOW_POPUP);
 121         const char* name = "gtk-tooltip";
 122         if (gtk_check_version(2, 11, 0))
 123             name = "gtk-tooltips";
 124         gtk_widget_set_name(s_widget, name);
 125         gtk_widget_ensure_style(s_widget);
 126     }
 127     return s_widget->style;
 128 }
 129
 130 wxColour wxSystemSettingsNative::GetColour( wxSystemColour index )
 131 {
 132     wxColor color;
 133     switch (index)
 134     {
 135         case wxSYS_COLOUR_SCROLLBAR:
 136         case wxSYS_COLOUR_BACKGROUND:
 137         //case wxSYS_COLOUR_DESKTOP:
 138         case wxSYS_COLOUR_INACTIVECAPTION:
 139         case wxSYS_COLOUR_MENU:
 140         case wxSYS_COLOUR_WINDOWFRAME:
 141         case wxSYS_COLOUR_ACTIVEBORDER:
 142         case wxSYS_COLOUR_INACTIVEBORDER:
 143         case wxSYS_COLOUR_BTNFACE:
 144         //case wxSYS_COLOUR_3DFACE:
 145         case wxSYS_COLOUR_3DLIGHT:
 146             color = wxColor(ButtonStyle()->bg[GTK_STATE_NORMAL]);
 147             break;
 148
 149         case wxSYS_COLOUR_WINDOW:
 150             color = wxColor(TextCtrlStyle()->base[GTK_STATE_NORMAL]);
 151             break;
 152
 153         case wxSYS_COLOUR_MENUBAR:
 154             color = wxColor(MenuBarStyle()->bg[GTK_STATE_NORMAL]);
 155             break;
 156
 157         case wxSYS_COLOUR_3DDKSHADOW:
 158             color = *wxBLACK;
 159             break;
 160
 161         case wxSYS_COLOUR_GRAYTEXT:
 162         case wxSYS_COLOUR_BTNSHADOW:
 163         //case wxSYS_COLOUR_3DSHADOW:
 164             {
 165                 wxColour faceColour(GetColour(wxSYS_COLOUR_3DFACE));
 166                 color =
 167                    wxColour((unsigned char) (faceColour.Red() * 2 / 3),
 168                             (unsigned char) (faceColour.Green() * 2 / 3),
 169                             (unsigned char) (faceColour.Blue() * 2 / 3));
 170             }
 171             break;
 172
 173         case wxSYS_COLOUR_BTNHIGHLIGHT:
 174         //case wxSYS_COLOUR_BTNHILIGHT:
 175         //case wxSYS_COLOUR_3DHIGHLIGHT:
 176         //case wxSYS_COLOUR_3DHILIGHT:
 177             color = *wxWHITE;
 178             break;
 179
 180         case wxSYS_COLOUR_HIGHLIGHT:
 181             color = wxColor(ButtonStyle()->bg[GTK_STATE_SELECTED]);
 182             break;
 183
 184         case wxSYS_COLOUR_LISTBOX:
 185             color = wxColor(ListStyle()->base[GTK_STATE_NORMAL]);
 186             break;
 187
 188         case wxSYS_COLOUR_LISTBOXTEXT:
 189             color = wxColor(ListStyle()->text[GTK_STATE_NORMAL]);
 190             break;
 191
 192         case wxSYS_COLOUR_MENUTEXT:
 193         case wxSYS_COLOUR_WINDOWTEXT:
 194         case wxSYS_COLOUR_CAPTIONTEXT:
 195         case wxSYS_COLOUR_INACTIVECAPTIONTEXT:
 196         case wxSYS_COLOUR_BTNTEXT:
 197             color = wxColor(ButtonStyle()->fg[GTK_STATE_NORMAL]);
 198             break;
 199
 200         case wxSYS_COLOUR_INFOBK:
 201             color = wxColor(ToolTipStyle()->bg[GTK_STATE_NORMAL]);
 202             break;
 203
 204         case wxSYS_COLOUR_INFOTEXT:
 205             color = wxColor(ToolTipStyle()->fg[GTK_STATE_NORMAL]);
 206             break;
 207
 208         case wxSYS_COLOUR_HIGHLIGHTTEXT:
 209             color = wxColor(ButtonStyle()->fg[GTK_STATE_SELECTED]);
 210             break;
 211
 212         case wxSYS_COLOUR_APPWORKSPACE:
 213             color = *wxWHITE;    // ?
 214             break;
 215
 216         case wxSYS_COLOUR_ACTIVECAPTION:
 217         case wxSYS_COLOUR_MENUHILIGHT:
 218             color = wxColor(MenuItemStyle()->bg[GTK_STATE_SELECTED]);
 219             break;
 220
 221         case wxSYS_COLOUR_HOTLIGHT:
 222         case wxSYS_COLOUR_GRADIENTACTIVECAPTION:
 223         case wxSYS_COLOUR_GRADIENTINACTIVECAPTION:
 224             // TODO
 225             color = *wxBLACK;
 226             break;
 227
 228         case wxSYS_COLOUR_MAX:
 229         default:
 230             wxFAIL_MSG( wxT("unknown system colour index") );
 231             color = *wxWHITE;
 232             break;
 233     }
 234
 235     wxASSERT(color.IsOk());
 236     return color;
 237 }
 238
 239 wxFont wxSystemSettingsNative::GetFont( wxSystemFont index )
 240 {
 241     wxFont font;
 242     switch (index)
 243     {
 244         case wxSYS_OEM_FIXED_FONT:
 245         case wxSYS_ANSI_FIXED_FONT:
 246         case wxSYS_SYSTEM_FIXED_FONT:
 247             font = *wxNORMAL_FONT;
 248             break;
 249
 250         case wxSYS_ANSI_VAR_FONT:
 251         case wxSYS_SYSTEM_FONT:
 252         case wxSYS_DEVICE_DEFAULT_FONT:
 253         case wxSYS_DEFAULT_GUI_FONT:
 254             if (!gs_fontSystem.Ok())
 255             {
 256                 wxNativeFontInfo info;
 257                 info.description = ButtonStyle()->font_desc;
 258                 gs_fontSystem = wxFont(info);
 259
 260 #if wxUSE_FONTENUM
 261                 // (try to) heal the default font (on some common systems e.g. Ubuntu
 262                 // it's "Sans Serif" but the real font is called "Sans"):
 263                 if (!wxFontEnumerator::IsValidFacename(gs_fontSystem.GetFaceName()) &&
 264                     gs_fontSystem.GetFaceName() == "Sans Serif")
 265                     gs_fontSystem.SetFaceName("Sans");
 266 #endif // wxUSE_FONTENUM
 267
 268                 info.description = NULL;
 269             }
 270             font = gs_fontSystem;
 271             break;
 272
 273         default:
 274             break;
 275     }
 276
 277     wxASSERT( font.IsOk() );
 278
 279     return font;
 280 }
 281
 282 // helper: return the GtkSettings either for the screen the current window is
 283 // on or for the default screen if window is NULL
 284 static GtkSettings *GetSettingsForWindowScreen(GdkWindow *window)
 285 {
 286     return window ? gtk_settings_get_for_screen(gdk_drawable_get_screen(window))
 287                   : gtk_settings_get_default();
 288 }
 289
 290 static int GetBorderWidth(wxSystemMetric index, wxWindow* win)
 291 {
 292     if (win->m_wxwindow)
 293     {
 294         wxPizza* pizza = WX_PIZZA(win->m_wxwindow);
 295         int x, y;
 296         pizza->get_border_widths(x, y);
 297         switch (index)
 298         {
 299             case wxSYS_BORDER_X:
 300             case wxSYS_EDGE_X:
 301             case wxSYS_FRAMESIZE_X:
 302                 return x;
 303             default:
 304                 return y;
 305         }
 306     }
 307     return -1;
 308 }
 309
 310 int wxSystemSettingsNative::GetMetric( wxSystemMetric index, wxWindow* win )
 311 {
 312     GdkWindow *window = NULL;
 313     if(win && GTK_WIDGET_REALIZED(win->GetHandle()))
 314         window = win->GetHandle()->window;
 315
 316     switch (index)
 317     {
 318         case wxSYS_BORDER_X:
 319         case wxSYS_BORDER_Y:
 320         case wxSYS_EDGE_X:
 321         case wxSYS_EDGE_Y:
 322         case wxSYS_FRAMESIZE_X:
 323         case wxSYS_FRAMESIZE_Y:
 324             if (win)
 325             {
 326                 wxTopLevelWindow *tlw = wxDynamicCast(win, wxTopLevelWindow);
 327                 if (!tlw)
 328                     return GetBorderWidth(index, win);
 329                 else if (window)
 330                 {
 331                     // Get the frame extents from the windowmanager.
 332                     // In most cases the top extent is the titlebar, so we use the bottom extent
 333                     // for the heights.
 334                     int right, bottom;
 335                     if (wxGetFrameExtents(window, NULL, &right, NULL, &bottom))
 336                     {
 337                         switch (index)
 338                         {
 339                             case wxSYS_BORDER_X:
 340                             case wxSYS_EDGE_X:
 341                             case wxSYS_FRAMESIZE_X:
 342                                 return right; // width of right extent
 343                             default:
 344                                 return bottom; // height of bottom extent
 345                         }
 346                     }
 347                 }
 348             }
 349
 350             return -1; // no window specified
 351
 352         case wxSYS_CURSOR_X:
 353         case wxSYS_CURSOR_Y:
 354                 return gdk_display_get_default_cursor_size(
 355                             window ? gdk_drawable_get_display(window)
 356                                    : gdk_display_get_default());
 357
 358         case wxSYS_DCLICK_X:
 359         case wxSYS_DCLICK_Y:
 360             gint dclick_distance;
 361             g_object_get(GetSettingsForWindowScreen(window),
 362                             "gtk-double-click-distance", &dclick_distance, NULL);
 363
 364             return dclick_distance * 2;
 365
 366         case wxSYS_DCLICK_MSEC:
 367             gint dclick;
 368             g_object_get(GetSettingsForWindowScreen(window),
 369                             "gtk-double-click-time", &dclick, NULL);
 370             return dclick;
 371
 372         case wxSYS_DRAG_X:
 373         case wxSYS_DRAG_Y:
 374             gint drag_threshold;
 375             g_object_get(GetSettingsForWindowScreen(window),
 376                             "gtk-dnd-drag-threshold", &drag_threshold, NULL);
 377
 378             // The correct thing here would be to double the value
 379             // since that is what the API wants. But the values
 380             // are much bigger under GNOME than under Windows and
 381             // just seem to much in many cases to be useful.
 382             // drag_threshold *= 2;
 383
 384             return drag_threshold;
 385
 386         case wxSYS_ICON_X:
 387         case wxSYS_ICON_Y:
 388             return 32;
 389
 390         case wxSYS_SCREEN_X:
 391             if (window)
 392                 return gdk_screen_get_width(gdk_drawable_get_screen(window));
 393             else
 394                 return gdk_screen_width();
 395
 396         case wxSYS_SCREEN_Y:
 397             if (window)
 398                 return gdk_screen_get_height(gdk_drawable_get_screen(window));
 399             else
 400                 return gdk_screen_height();
 401
 402         case wxSYS_HSCROLL_Y:
 403         case wxSYS_VSCROLL_X:
 404             return 15;
 405
 406         case wxSYS_CAPTION_Y:
 407             if (!window)
 408                 // No realized window specified, and no implementation for that case yet.
 409                 return -1;
 410
 411             wxASSERT_MSG( wxDynamicCast(win, wxTopLevelWindow),
 412                           wxT("Asking for caption height of a non toplevel window") );
 413
 414             // Get the height of the top windowmanager border.
 415             // This is the titlebar in most cases. The titlebar might be elsewhere, and
 416             // we could check which is the thickest wm border to decide on which side the
 417             // titlebar is, but this might lead to interesting behaviours in used code.
 418             // Reconsider when we have a way to report to the user on which side it is.
 419             {
 420                 int top;
 421                 if (wxGetFrameExtents(window, NULL, NULL, &top, NULL))
 422                 {
 423                     return top; // top frame extent
 424                 }
 425             }
 426
 427             // Try a default approach without a window pointer, if possible
 428             // ...
 429
 430             return -1;
 431
 432         case wxSYS_PENWINDOWS_PRESENT:
 433             // No MS Windows for Pen computing extension available in X11 based gtk+.
 434             return 0;
 435
 436         default:
 437             return -1;   // metric is unknown
 438     }
 439 }
 440
 441 bool wxSystemSettingsNative::HasFeature(wxSystemFeature index)
 442 {
 443     switch (index)
 444     {
 445         case wxSYS_CAN_ICONIZE_FRAME:
 446             return false;
 447
 448         case wxSYS_CAN_DRAW_FRAME_DECORATIONS:
 449             return true;
 450
 451         default:
 452             return false;
 453     }
 454 }