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     InheritAttributes();
 107     ApplyWidgetStyle();
 108     SetInitialBestSize(size);
 109 }
 110
 111
 112 #ifdef __WXGTK20__
 113 wxString wxControl::PrepareLabelMnemonics( const wxString &label ) const
 114 {
 115     //Format mnemonics properly for GTK2. This can be called from GTK1.x, but
 116     //it's not very useful because mnemonics don't exist prior to GTK2.
 117     wxString label2;
 118     for (size_t i = 0; i < label.Len(); i++)
 119     {
 120         if (label.GetChar(i) == wxT('&'))
 121         {
 122             //Mnemonic escape sequence "&&" is a literal "&" in the output.
 123             if (label.GetChar(i + 1) == wxT('&'))
 124             {
 125                 label2 << wxT('&');
 126                 i++;
 127             }
 128             //Handle special case of "&_" (i.e. "_" is the mnemonic).
 129             //FIXME - Is it possible to use "_" as a GTK mnemonic? Just use a
 130             //dash for now.
 131             else if (label.GetChar(i + 1) == wxT('_'))
 132             {
 133                 label2 << wxT("_-");
 134                 i++;
 135             }
 136             //Replace WX mnemonic indicator "&" with GTK indicator "_".
 137             else
 138             {
 139                 label2 << wxT('_');
 140             }
 141         }
 142         else if (label.GetChar(i) == wxT('_'))
 143         {
 144             //Escape any underlines in the string so GTK doesn't use them.
 145             label2 << wxT("__");
 146         }
 147         else
 148         {
 149             label2 << label.GetChar(i);
 150         }
 151     }
 152     return label2;
 153 }
 154 #endif
 155
 156
 157 wxVisualAttributes wxControl::GetDefaultAttributes() const
 158 {
 159     return GetDefaultAttributesFromGTKWidget(m_widget,
 160                                              UseGTKStyleBase());
 161 }
 162
 163
 164 #define SHIFT (8*(sizeof(short int)-sizeof(char)))
 165
 166 // static
 167 wxVisualAttributes
 168 wxControl::GetDefaultAttributesFromGTKWidget(GtkWidget* widget,
 169                                              bool useBase,
 170                                              int state)
 171 {
 172     GtkStyle* style;
 173     wxVisualAttributes attr;
 174
 175     style = gtk_rc_get_style(widget);
 176     if (!style)
 177         style = gtk_widget_get_default_style();
 178
 179     if (!style)
 180     {
 181         return wxWindow::GetClassDefaultAttributes(wxWINDOW_VARIANT_NORMAL);
 182     }
 183
 184     if (state == -1)
 185         state = GTK_STATE_NORMAL;
 186
 187     // get the style's colours
 188     attr.colFg = wxColour(style->fg[state].red   >> SHIFT,
 189                           style->fg[state].green >> SHIFT,
 190                           style->fg[state].blue  >> SHIFT);
 191     if (useBase)
 192         attr.colBg = wxColour(style->base[state].red   >> SHIFT,
 193                               style->base[state].green >> SHIFT,
 194                               style->base[state].blue  >> SHIFT);
 195     else
 196         attr.colBg = wxColour(style->bg[state].red   >> SHIFT,
 197                               style->bg[state].green >> SHIFT,
 198                               style->bg[state].blue  >> SHIFT);
 199
 200     // get the style's font
 201 #ifdef __WXGTK20__
 202     if ( !style->font_desc )
 203         style = gtk_widget_get_default_style();
 204     if ( style && style->font_desc )
 205     {
 206         wxNativeFontInfo info;
 207         info.description = pango_font_description_copy(style->font_desc);
 208         attr.font = wxFont(info);
 209     }
 210     else
 211     {
 212         GtkSettings *settings = gtk_settings_get_default();
 213         gchar *font_name = NULL;
 214         g_object_get ( settings,
 215                        "gtk-font-name",
 216                        &font_name,
 217                        NULL);
 218         if (!font_name)
 219             attr.font = wxSystemSettings::GetFont( wxSYS_DEFAULT_GUI_FONT );
 220         else
 221             attr.font = wxFont(wxString::FromAscii(font_name));
 222         g_free (font_name);
 223     }
 224 #else
 225     // TODO: isn't there a way to get a standard gtk 1.2 font?
 226     attr.font = wxFont( 12, wxSWISS, wxNORMAL, wxNORMAL );
 227 #endif
 228
 229     return attr;
 230 }
 231
 232
 233 //static
 234 wxVisualAttributes
 235 wxControl::GetDefaultAttributesFromGTKWidget(GtkWidget* (*widget_new)(void),
 236                                              bool useBase,
 237                                              int state)
 238 {
 239     wxVisualAttributes attr;
 240     GtkWidget* widget = widget_new();
 241     attr = GetDefaultAttributesFromGTKWidget(widget, useBase, state);
 242     gtk_widget_destroy(widget);
 243     return attr;
 244 }
 245
 246 //static
 247 wxVisualAttributes
 248 wxControl::GetDefaultAttributesFromGTKWidget(GtkWidget* (*widget_new)(const gchar*),
 249                                              bool useBase,
 250                                              int state)
 251 {
 252     wxVisualAttributes attr;
 253     GtkWidget* widget = widget_new("");
 254     attr = GetDefaultAttributesFromGTKWidget(widget, useBase, state);
 255     gtk_widget_destroy(widget);
 256     return attr;
 257 }
 258
 259
 260 //static
 261 wxVisualAttributes
 262 wxControl::GetDefaultAttributesFromGTKWidget(GtkWidget* (*widget_new)(GtkAdjustment*),
 263                                              bool useBase,
 264                                              int state)
 265 {
 266     wxVisualAttributes attr;
 267     GtkWidget* widget = widget_new(NULL);
 268     attr = GetDefaultAttributesFromGTKWidget(widget, useBase, state);
 269     gtk_widget_destroy(widget);
 270     return attr;
 271 }
 272
 273 #endif // wxUSE_CONTROLS
 274