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 }
  70
  71 wxString wxControl::GetLabel() const
  72 {
  73     return m_label;
  74 }
  75
  76
  77 wxSize wxControl::DoGetBestSize() const
  78 {
  79     // Do not return any arbitrary default value...
  80     wxASSERT_MSG( m_widget, wxT("DoGetBestSize called before creation") );
  81
  82     GtkRequisition req;
  83     req.width = 2;
  84     req.height = 2;
  85     (* GTK_WIDGET_CLASS( GTK_OBJECT_GET_CLASS(m_widget) )->size_request )
  86         (m_widget, &req );
  87
  88     return wxSize(req.width, req.height);
  89 }
  90
  91
  92 void wxControl::PostCreation(const wxSize& size)
  93 {
  94     wxWindow::PostCreation();
  95     InheritAttributes();
  96     ApplyWidgetStyle();
  97     SetInitialBestSize(size);
  98 }
  99
 100
 101 #ifdef __WXGTK20__
 102 wxString wxControl::PrepareLabelMnemonics( const wxString &label ) const
 103 {
 104     //Format mnemonics properly for GTK2. This can be called from GTK1.x, but
 105     //it's not very useful because mnemonics don't exist prior to GTK2.
 106     wxString label2;
 107     for (size_t i = 0; i < label.Len(); i++)
 108     {
 109         if (label.GetChar(i) == wxT('&'))
 110         {
 111             //Mnemonic escape sequence "&&" is a literal "&" in the output.
 112             if (label.GetChar(i + 1) == wxT('&'))
 113             {
 114                 label2 << wxT('&');
 115                 i++;
 116             }
 117             //Handle special case of "&_" (i.e. "_" is the mnemonic).
 118             //FIXME - Is it possible to use "_" as a GTK mnemonic? Just use a
 119             //dash for now.
 120             else if (label.GetChar(i + 1) == wxT('_'))
 121             {
 122                 label2 << wxT("_-");
 123                 i++;
 124             }
 125             //Replace WX mnemonic indicator "&" with GTK indicator "_".
 126             else
 127             {
 128                 label2 << wxT('_');
 129             }
 130         }
 131         else if (label.GetChar(i) == wxT('_'))
 132         {
 133             //Escape any underlines in the string so GTK doesn't use them.
 134             label2 << wxT("__");
 135         }
 136         else
 137         {
 138             label2 << label.GetChar(i);
 139         }
 140     }
 141     return label2;
 142 }
 143 #endif
 144
 145
 146 wxVisualAttributes wxControl::GetDefaultAttributes() const
 147 {
 148     return GetDefaultAttributesFromGTKWidget(m_widget,
 149                                              UseGTKStyleBase());
 150 }
 151
 152
 153 #define SHIFT (8*(sizeof(short int)-sizeof(char)))
 154
 155 // static
 156 wxVisualAttributes
 157 wxControl::GetDefaultAttributesFromGTKWidget(GtkWidget* widget,
 158                                              bool useBase,
 159                                              int state)
 160 {
 161     GtkStyle* style;
 162     wxVisualAttributes attr;
 163
 164     style = gtk_rc_get_style(widget);
 165     if (!style)
 166         style = gtk_widget_get_default_style();
 167
 168     if (!style)
 169     {
 170         return wxWindow::GetClassDefaultAttributes(wxWINDOW_VARIANT_NORMAL);
 171     }
 172
 173     if (state == -1)
 174         state = GTK_STATE_NORMAL;
 175
 176     // get the style's colours
 177     attr.colFg = wxColour(style->fg[state].red   >> SHIFT,
 178                           style->fg[state].green >> SHIFT,
 179                           style->fg[state].blue  >> SHIFT);
 180     if (useBase)
 181         attr.colBg = wxColour(style->base[state].red   >> SHIFT,
 182                               style->base[state].green >> SHIFT,
 183                               style->base[state].blue  >> SHIFT);
 184     else
 185         attr.colBg = wxColour(style->bg[state].red   >> SHIFT,
 186                               style->bg[state].green >> SHIFT,
 187                               style->bg[state].blue  >> SHIFT);
 188
 189     // get the style's font
 190 #ifdef __WXGTK20__
 191     if ( !style->font_desc )
 192         style = gtk_widget_get_default_style();
 193     if ( style && style->font_desc )
 194     {
 195         wxNativeFontInfo info;
 196         info.description = style->font_desc;
 197         attr.font = wxFont(info);
 198     }
 199     else
 200     {
 201         GtkSettings *settings = gtk_settings_get_default();
 202         gchar *font_name = NULL;
 203         g_object_get ( settings,
 204                        "gtk-font-name",
 205                        &font_name,
 206                        NULL);
 207         if (!font_name)
 208             attr.font = wxSystemSettings::GetFont( wxSYS_DEFAULT_GUI_FONT );
 209         else
 210             attr.font = wxFont(wxString::FromAscii(font_name));
 211         g_free (font_name);
 212     }
 213 #else
 214     // TODO: isn't there a way to get a standard gtk 1.2 font?
 215     attr.font = wxFont( 12, wxSWISS, wxNORMAL, wxNORMAL );
 216 #endif
 217
 218     return attr;
 219 }
 220
 221
 222 //static
 223 wxVisualAttributes
 224 wxControl::GetDefaultAttributesFromGTKWidget(GtkWidget* (*widget_new)(void),
 225                                              bool useBase,
 226                                              int state)
 227 {
 228     wxVisualAttributes attr;
 229     GtkWidget* widget = widget_new();
 230     attr = GetDefaultAttributesFromGTKWidget(widget, useBase, state);
 231     gtk_widget_destroy(widget);
 232     return attr;
 233 }
 234
 235 //static
 236 wxVisualAttributes
 237 wxControl::GetDefaultAttributesFromGTKWidget(GtkWidget* (*widget_new)(const gchar*),
 238                                              bool useBase,
 239                                              int state)
 240 {
 241     wxVisualAttributes attr;
 242     GtkWidget* widget = widget_new("");
 243     attr = GetDefaultAttributesFromGTKWidget(widget, useBase, state);
 244     gtk_widget_destroy(widget);
 245     return attr;
 246 }
 247
 248
 249 //static
 250 wxVisualAttributes
 251 wxControl::GetDefaultAttributesFromGTKWidget(GtkWidget* (*widget_new)(GtkAdjustment*),
 252                                              bool useBase,
 253                                              int state)
 254 {
 255     wxVisualAttributes attr;
 256     GtkWidget* widget = widget_new(NULL);
 257     attr = GetDefaultAttributesFromGTKWidget(widget, useBase, state);
 258     gtk_widget_destroy(widget);
 259     return attr;
 260 }
 261
 262
 263 #endif // wxUSE_CONTROLS
 264