src/gtk/control.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        control.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling, Julian Smart and Vadim Zeitlin
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  11 #pragma implementation "control.h"
  12 #endif
  13
  14 // For compilers that support precompilation, includes "wx.h".
  15 #include "wx/wxprec.h"
  16
  17 #include "wx/defs.h"
  18
  19 #if wxUSE_CONTROLS
  20
  21 #include "wx/control.h"
  22 #include "wx/fontutil.h"
  23 #include "wx/settings.h"
  24
  25 #include <gtk/gtk.h>
  26
  27 //-----------------------------------------------------------------------------
  28 // wxControl
  29 //-----------------------------------------------------------------------------
  30
  31 IMPLEMENT_DYNAMIC_CLASS(wxControl, wxWindow)
  32
  33 wxControl::wxControl()
  34 {
  35     m_needParent = TRUE;
  36 }
  37
  38 bool wxControl::Create( wxWindow *parent,
  39                       wxWindowID id,
  40                       const wxPoint &pos,
  41                       const wxSize &size,
  42                       long style,
  43                       const wxValidator& validator,
  44                       const wxString &name )
  45 {
  46     bool ret = wxWindow::Create(parent, id, pos, size, style, name);
  47
  48 #if wxUSE_VALIDATORS
  49     SetValidator(validator);
  50 #endif
  51
  52     return ret;
  53 }
  54
  55 void wxControl::SetLabel( const wxString &label )
  56 {
  57     m_label.Empty();
  58     for ( const wxChar *pc = label; *pc != wxT('\0'); pc++ )
  59     {
  60         if ( *pc == wxT('&') )
  61         {
  62             pc++; // skip it
  63 #if 0 // it would be unused anyhow for now - kbd interface not done yet
  64             if ( *pc != wxT('&') ) m_chAccel = *pc;
  65 #endif
  66         }
  67         m_label << *pc;
  68     }
  69     InvalidateBestSize();
  70 }
  71
  72 wxString wxControl::GetLabel() const
  73 {
  74     return m_label;
  75 }
  76
  77
  78 wxSize wxControl::DoGetBestSize() const
  79 {
  80     // Do not return any arbitrary default value...
  81     wxASSERT_MSG( m_widget, wxT("DoGetBestSize called before creation") );
  82
  83     GtkRequisition req;
  84     req.width = 2;
  85     req.height = 2;
  86     (* GTK_WIDGET_CLASS( GTK_OBJECT_GET_CLASS(m_widget) )->size_request )
  87         (m_widget, &req );
  88
  89     wxSize best(req.width, req.height);
  90     CacheBestSize(best);
  91     return best;
  92 }
  93
  94
  95 void wxControl::PostCreation(const wxSize& size)
  96 {
  97     wxWindow::PostCreation();
  98
  99     // NB: GetBestSize needs to know the style, otherwise it will assume
 100     //     default font and if the user uses a different font, determined
 101     //     best size will be different (typically, smaller) than the desired
 102     //     size. This call ensure that a style is available at the time
 103     //     GetBestSize is called.
 104     gtk_widget_ensure_style(m_widget);
 105
 106     ApplyWidgetStyle();
 107     SetInitialBestSize(size);
 108 }
 109
 110
 111 #ifdef __WXGTK20__
 112 wxString wxControl::PrepareLabelMnemonics( const wxString &label ) const
 113 {
 114     //Format mnemonics properly for GTK2. This can be called from GTK1.x, but
 115     //it's not very useful because mnemonics don't exist prior to GTK2.
 116     wxString label2;
 117     for (size_t i = 0; i < label.Len(); i++)
 118     {
 119         if (label.GetChar(i) == wxT('&'))
 120         {
 121             //Mnemonic escape sequence "&&" is a literal "&" in the output.
 122             if (label.GetChar(i + 1) == wxT('&'))
 123             {
 124                 label2 << wxT('&');
 125                 i++;
 126             }
 127             //Handle special case of "&_" (i.e. "_" is the mnemonic).
 128             //FIXME - Is it possible to use "_" as a GTK mnemonic? Just use a
 129             //dash for now.
 130             else if (label.GetChar(i + 1) == wxT('_'))
 131             {
 132                 label2 << wxT("_-");
 133                 i++;
 134             }
 135             //Replace WX mnemonic indicator "&" with GTK indicator "_".
 136             else
 137             {
 138                 label2 << wxT('_');
 139             }
 140         }
 141         else if (label.GetChar(i) == wxT('_'))
 142         {
 143             //Escape any underlines in the string so GTK doesn't use them.
 144             label2 << wxT("__");
 145         }
 146         else
 147         {
 148             label2 << label.GetChar(i);
 149         }
 150     }
 151     return label2;
 152 }
 153 #endif
 154
 155
 156 wxVisualAttributes wxControl::GetDefaultAttributes() const
 157 {
 158     return GetDefaultAttributesFromGTKWidget(m_widget,
 159                                              UseGTKStyleBase());
 160 }
 161
 162
 163 #define SHIFT (8*(sizeof(short int)-sizeof(char)))
 164
 165 // static
 166 wxVisualAttributes
 167 wxControl::GetDefaultAttributesFromGTKWidget(GtkWidget* widget,
 168                                              bool useBase,
 169                                              int state)
 170 {
 171     GtkStyle* style;
 172     wxVisualAttributes attr;
 173
 174     style = gtk_rc_get_style(widget);
 175     if (!style)
 176         style = gtk_widget_get_default_style();
 177
 178     if (!style)
 179     {
 180         return wxWindow::GetClassDefaultAttributes(wxWINDOW_VARIANT_NORMAL);
 181     }
 182
 183     if (state == -1)
 184         state = GTK_STATE_NORMAL;
 185
 186     // get the style's colours
 187     attr.colFg = wxColour(style->fg[state].red   >> SHIFT,
 188                           style->fg[state].green >> SHIFT,
 189                           style->fg[state].blue  >> SHIFT);
 190     if (useBase)
 191         attr.colBg = wxColour(style->base[state].red   >> SHIFT,
 192                               style->base[state].green >> SHIFT,
 193                               style->base[state].blue  >> SHIFT);
 194     else
 195         attr.colBg = wxColour(style->bg[state].red   >> SHIFT,
 196                               style->bg[state].green >> SHIFT,
 197                               style->bg[state].blue  >> SHIFT);
 198
 199     // get the style's font
 200 #ifdef __WXGTK20__
 201     if ( !style->font_desc )
 202         style = gtk_widget_get_default_style();
 203     if ( style && style->font_desc )
 204     {
 205         wxNativeFontInfo info;
 206         info.description = pango_font_description_copy(style->font_desc);
 207         attr.font = wxFont(info);
 208     }
 209     else
 210     {
 211         GtkSettings *settings = gtk_settings_get_default();
 212         gchar *font_name = NULL;
 213         g_object_get ( settings,
 214                        "gtk-font-name",
 215                        &font_name,
 216                        NULL);
 217         if (!font_name)
 218             attr.font = wxSystemSettings::GetFont( wxSYS_DEFAULT_GUI_FONT );
 219         else
 220             attr.font = wxFont(wxString::FromAscii(font_name));
 221         g_free (font_name);
 222     }
 223 #else
 224     // TODO: isn't there a way to get a standard gtk 1.2 font?
 225     attr.font = wxFont( 12, wxSWISS, wxNORMAL, wxNORMAL );
 226 #endif
 227
 228     return attr;
 229 }
 230
 231
 232 //static
 233 wxVisualAttributes
 234 wxControl::GetDefaultAttributesFromGTKWidget(GtkWidget* (*widget_new)(void),
 235                                              bool useBase,
 236                                              int state)
 237 {
 238     wxVisualAttributes attr;
 239     // NB: we need toplevel window so that GTK+ can find the right style
 240     GtkWidget *wnd = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 241     GtkWidget* widget = widget_new();
 242     gtk_container_add(GTK_CONTAINER(wnd), widget);
 243     attr = GetDefaultAttributesFromGTKWidget(widget, useBase, state);
 244     gtk_widget_destroy(wnd);
 245     return attr;
 246 }
 247
 248 //static
 249 wxVisualAttributes
 250 wxControl::GetDefaultAttributesFromGTKWidget(GtkWidget* (*widget_new)(const gchar*),
 251                                              bool useBase,
 252                                              int state)
 253 {
 254     wxVisualAttributes attr;
 255     // NB: we need toplevel window so that GTK+ can find the right style
 256     GtkWidget *wnd = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 257     GtkWidget* widget = widget_new("");
 258     gtk_container_add(GTK_CONTAINER(wnd), widget);
 259     attr = GetDefaultAttributesFromGTKWidget(widget, useBase, state);
 260     gtk_widget_destroy(wnd);
 261     return attr;
 262 }
 263
 264
 265 //static
 266 wxVisualAttributes
 267 wxControl::GetDefaultAttributesFromGTKWidget(GtkWidget* (*widget_new)(GtkAdjustment*),
 268                                              bool useBase,
 269                                              int state)
 270 {
 271     wxVisualAttributes attr;
 272     // NB: we need toplevel window so that GTK+ can find the right style
 273     GtkWidget *wnd = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 274     GtkWidget* widget = widget_new(NULL);
 275     gtk_container_add(GTK_CONTAINER(wnd), widget);
 276     attr = GetDefaultAttributesFromGTKWidget(widget, useBase, state);
 277     gtk_widget_destroy(wnd);
 278     return attr;
 279 }
 280
 281 #endif // wxUSE_CONTROLS
 282