src/gtk1/control.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk1/control.cpp
   3 // Purpose:     wxControl implementation for wxGTK
   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 // For compilers that support precompilation, includes "wx.h".
  11 #include "wx/wxprec.h"
  12
  13 #if wxUSE_CONTROLS
  14
  15 #include "wx/control.h"
  16
  17 #ifndef WX_PRECOMP
  18     #include "wx/log.h"
  19     #include "wx/settings.h"
  20 #endif
  21
  22 #include "wx/fontutil.h"
  23 #include "wx/gtk1/private.h"
  24
  25 // ============================================================================
  26 // wxControl implementation
  27 // ============================================================================
  28
  29 // ----------------------------------------------------------------------------
  30 // wxControl creation
  31 // ----------------------------------------------------------------------------
  32
  33 IMPLEMENT_DYNAMIC_CLASS(wxControl, wxWindow)
  34
  35 wxControl::wxControl()
  36 {
  37     m_needParent = true;
  38 }
  39
  40 bool wxControl::Create( wxWindow *parent,
  41                       wxWindowID id,
  42                       const wxPoint &pos,
  43                       const wxSize &size,
  44                       long style,
  45                       const wxValidator& validator,
  46                       const wxString &name )
  47 {
  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 wxSize wxControl::DoGetBestSize() const
  58 {
  59     // Do not return any arbitrary default value...
  60     wxASSERT_MSG( m_widget, wxT("DoGetBestSize called before creation") );
  61
  62     GtkRequisition req;
  63     req.width = 2;
  64     req.height = 2;
  65     (* GTK_WIDGET_CLASS( GTK_OBJECT_GET_CLASS(m_widget) )->size_request )
  66         (m_widget, &req );
  67
  68     wxSize best(req.width, req.height);
  69     CacheBestSize(best);
  70     return best;
  71 }
  72
  73
  74 void wxControl::PostCreation(const wxSize& size)
  75 {
  76     wxWindow::PostCreation();
  77
  78     // NB: GetBestSize needs to know the style, otherwise it will assume
  79     //     default font and if the user uses a different font, determined
  80     //     best size will be different (typically, smaller) than the desired
  81     //     size. This call ensure that a style is available at the time
  82     //     GetBestSize is called.
  83     gtk_widget_ensure_style(m_widget);
  84
  85     ApplyWidgetStyle();
  86     SetInitialSize(size);
  87 }
  88
  89 // ----------------------------------------------------------------------------
  90 // wxControl dealing with labels
  91 // ----------------------------------------------------------------------------
  92
  93 void wxControl::SetLabel( const wxString &label )
  94 {
  95     // keep the original string internally to be able to return it later (for
  96     // consistency with the other ports)
  97     m_label = label;
  98
  99     InvalidateBestSize();
 100 }
 101
 102 wxString wxControl::GetLabel() const
 103 {
 104     return m_label;
 105 }
 106
 107 void wxControl::GTKSetLabelForLabel(GtkLabel *w, const wxString& label)
 108 {
 109     // don't call the virtual function which might call this one back again
 110     wxControl::SetLabel(label);
 111
 112     const wxString labelGTK = GTKRemoveMnemonics(label);
 113
 114     gtk_label_set(w, wxGTK_CONV(labelGTK));
 115 }
 116
 117 void wxControl::GTKSetLabelForFrame(GtkFrame *w, const wxString& label)
 118 {
 119     wxControl::SetLabel(label);
 120
 121     const wxString labelGTK = GTKRemoveMnemonics(label);
 122
 123     gtk_frame_set_label(w, labelGTK.empty() ? (char *)NULL
 124                                             : wxGTK_CONV(labelGTK));
 125 }
 126
 127 /* static */
 128 wxString wxControl::GTKRemoveMnemonics(const wxString& label)
 129 {
 130     const size_t len = label.length();
 131     wxString labelGTK;
 132     labelGTK.reserve(len);
 133     for ( size_t i = 0; i < len; i++ )
 134     {
 135         wxChar ch = label[i];
 136
 137         if ( ch == _T('&') )
 138         {
 139             if ( i == len - 1 )
 140             {
 141                 // "&" at the end of string is an error
 142                 wxLogDebug(wxT("Invalid label \"%s\"."), label.c_str());
 143                 break;
 144             }
 145
 146             ch = label[++i]; // skip '&' itself
 147             if ( ch == _T('&') )
 148             {
 149                 // special case: "&&" is not a mnemonic at all but just an
 150                 // escaped "&"
 151                 labelGTK += wxT('&');
 152                 continue;
 153             }
 154         }
 155
 156         labelGTK += ch;
 157     }
 158
 159     return labelGTK;
 160 }
 161
 162 // ----------------------------------------------------------------------------
 163 // wxControl styles (a.k.a. attributes)
 164 // ----------------------------------------------------------------------------
 165
 166 wxVisualAttributes wxControl::GetDefaultAttributes() const
 167 {
 168     return GetDefaultAttributesFromGTKWidget(m_widget,
 169                                              UseGTKStyleBase());
 170 }
 171
 172
 173 #define SHIFT (8*(sizeof(short int)-sizeof(char)))
 174
 175 // static
 176 wxVisualAttributes
 177 wxControl::GetDefaultAttributesFromGTKWidget(GtkWidget* widget,
 178                                              bool useBase,
 179                                              int state)
 180 {
 181     GtkStyle* style;
 182     wxVisualAttributes attr;
 183
 184     style = gtk_rc_get_style(widget);
 185     if (!style)
 186         style = gtk_widget_get_default_style();
 187
 188     if (!style)
 189     {
 190         return wxWindow::GetClassDefaultAttributes(wxWINDOW_VARIANT_NORMAL);
 191     }
 192
 193     if (state == -1)
 194         state = GTK_STATE_NORMAL;
 195
 196     // get the style's colours
 197     attr.colFg = wxColour(style->fg[state].red   >> SHIFT,
 198                           style->fg[state].green >> SHIFT,
 199                           style->fg[state].blue  >> SHIFT);
 200     if (useBase)
 201         attr.colBg = wxColour(style->base[state].red   >> SHIFT,
 202                               style->base[state].green >> SHIFT,
 203                               style->base[state].blue  >> SHIFT);
 204     else
 205         attr.colBg = wxColour(style->bg[state].red   >> SHIFT,
 206                               style->bg[state].green >> SHIFT,
 207                               style->bg[state].blue  >> SHIFT);
 208
 209     // get the style's font
 210     // TODO: isn't there a way to get a standard gtk 1.2 font?
 211     attr.font = wxFont( 12, wxSWISS, wxNORMAL, wxNORMAL );
 212
 213     return attr;
 214 }
 215
 216
 217 //static
 218 wxVisualAttributes
 219 wxControl::GetDefaultAttributesFromGTKWidget(wxGtkWidgetNew_t widget_new,
 220                                              bool useBase,
 221                                              int state)
 222 {
 223     wxVisualAttributes attr;
 224     // NB: we need toplevel window so that GTK+ can find the right style
 225     GtkWidget *wnd = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 226     GtkWidget* widget = widget_new();
 227     gtk_container_add(GTK_CONTAINER(wnd), widget);
 228     attr = GetDefaultAttributesFromGTKWidget(widget, useBase, state);
 229     gtk_widget_destroy(wnd);
 230     return attr;
 231 }
 232
 233 //static
 234 wxVisualAttributes
 235 wxControl::GetDefaultAttributesFromGTKWidget(wxGtkWidgetNewFromStr_t widget_new,
 236                                              bool useBase,
 237                                              int state)
 238 {
 239     wxVisualAttributes attr;
 240     // NB: we need toplevel window so that GTK+ can find the right style
 241     GtkWidget *wnd = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 242     GtkWidget* widget = widget_new("");
 243     gtk_container_add(GTK_CONTAINER(wnd), widget);
 244     attr = GetDefaultAttributesFromGTKWidget(widget, useBase, state);
 245     gtk_widget_destroy(wnd);
 246     return attr;
 247 }
 248
 249
 250 //static
 251 wxVisualAttributes
 252 wxControl::GetDefaultAttributesFromGTKWidget(wxGtkWidgetNewFromAdj_t widget_new,
 253                                              bool useBase,
 254                                              int state)
 255 {
 256     wxVisualAttributes attr;
 257     // NB: we need toplevel window so that GTK+ can find the right style
 258     GtkWidget *wnd = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 259     GtkWidget* widget = widget_new(NULL);
 260     gtk_container_add(GTK_CONTAINER(wnd), widget);
 261     attr = GetDefaultAttributesFromGTKWidget(widget, useBase, state);
 262     gtk_widget_destroy(wnd);
 263     return attr;
 264 }
 265
 266 #endif // wxUSE_CONTROLS