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