src/gtk/choice.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        choice.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10
  11 #ifdef __GNUG__
  12 #pragma implementation "choice.h"
  13 #endif
  14
  15 #include "wx/choice.h"
  16
  17 //-----------------------------------------------------------------------------
  18 // data
  19 //-----------------------------------------------------------------------------
  20
  21 extern bool   g_blockEventsOnDrag;
  22
  23 //-----------------------------------------------------------------------------
  24 // "activate"
  25 //-----------------------------------------------------------------------------
  26
  27 static void gtk_choice_clicked_callback( GtkWidget *WXUNUSED(widget), wxChoice *choice )
  28 {
  29   if (!choice->HasVMT()) return;
  30   if (g_blockEventsOnDrag) return;
  31
  32   wxCommandEvent event(wxEVT_COMMAND_CHOICE_SELECTED, choice->GetId() );
  33   event.SetInt( choice->GetSelection() );
  34   wxString tmp( choice->GetStringSelection() );
  35   event.SetString( WXSTRINGCAST(tmp) );
  36   event.SetEventObject(choice);
  37   choice->GetEventHandler()->ProcessEvent(event);
  38 }
  39
  40 //-----------------------------------------------------------------------------
  41 // wxChoice
  42 //-----------------------------------------------------------------------------
  43
  44 IMPLEMENT_DYNAMIC_CLASS(wxChoice,wxControl)
  45
  46 wxChoice::wxChoice()
  47 {
  48 }
  49
  50 bool wxChoice::Create( wxWindow *parent, wxWindowID id,
  51                        const wxPoint &pos, const wxSize &size,
  52                        int n, const wxString choices[],
  53                        long style, const wxValidator& validator, const wxString &name )
  54 {
  55     m_needParent = TRUE;
  56
  57     PreCreation( parent, id, pos, size, style, name );
  58
  59     SetValidator( validator );
  60
  61     m_widget = gtk_option_menu_new();
  62
  63     wxSize newSize = size;
  64     if (newSize.x == -1) newSize.x = 80;
  65     if (newSize.y == -1) newSize.y = 26;
  66     SetSize( newSize.x, newSize.y );
  67
  68     GtkWidget *menu = gtk_menu_new();
  69
  70     for (int i = 0; i < n; i++)
  71     {
  72         m_clientDataList.Append( (wxObject*) NULL );
  73         m_clientObjectList.Append( (wxObject*) NULL );
  74
  75         GtkWidget *item = gtk_menu_item_new_with_label( choices[i] );
  76         gtk_menu_append( GTK_MENU(menu), item );
  77
  78         gtk_widget_realize( item );
  79         gtk_widget_realize( GTK_BIN(item)->child );
  80
  81         gtk_widget_show( item );
  82
  83         gtk_signal_connect( GTK_OBJECT( item ), "activate",
  84           GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );
  85     }
  86     gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu );
  87
  88     m_parent->AddChild( this );
  89
  90     (m_parent->m_insertCallback)( m_parent, this );
  91
  92     PostCreation();
  93
  94     SetBackgroundColour( parent->GetBackgroundColour() );
  95     SetForegroundColour( parent->GetForegroundColour() );
  96
  97     Show( TRUE );
  98
  99     return TRUE;
 100 }
 101
 102 wxChoice::~wxChoice()
 103 {
 104     Clear();
 105 }
 106
 107 void wxChoice::AppendCommon( const wxString &item )
 108 {
 109     wxCHECK_RET( m_widget != NULL, "invalid choice" );
 110
 111     GtkWidget *menu = gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) );
 112     GtkWidget *menu_item = gtk_menu_item_new_with_label( item );
 113
 114     gtk_menu_append( GTK_MENU(menu), menu_item );
 115
 116     gtk_widget_realize( menu_item );
 117     gtk_widget_realize( GTK_BIN(menu_item)->child );
 118
 119     if (m_widgetStyle) ApplyWidgetStyle();
 120
 121     gtk_signal_connect( GTK_OBJECT( menu_item ), "activate",
 122       GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );
 123
 124     gtk_widget_show( menu_item );
 125 }
 126
 127 void wxChoice::Append( const wxString &item )
 128 {
 129     m_clientDataList.Append( (wxObject*) NULL );
 130     m_clientObjectList.Append( (wxObject*) NULL );
 131
 132     AppendCommon( item );
 133 }
 134
 135 void wxChoice::Append( const wxString &item, void *clientData )
 136 {
 137     m_clientDataList.Append( (wxObject*) clientData );
 138     m_clientObjectList.Append( (wxObject*) NULL );
 139
 140     AppendCommon( item );
 141 }
 142
 143 void wxChoice::Append( const wxString &item, wxClientData *clientData )
 144 {
 145     m_clientObjectList.Append( (wxObject*) clientData );
 146     m_clientDataList.Append( (wxObject*) NULL );
 147
 148     AppendCommon( item );
 149 }
 150
 151 void wxChoice::SetClientData( int n, void* clientData )
 152 {
 153     wxCHECK_RET( m_widget != NULL, "invalid combobox" );
 154
 155     wxNode *node = m_clientDataList.Nth( n );
 156     if (!node) return;
 157
 158     node->SetData( (wxObject*) clientData );
 159 }
 160
 161 void* wxChoice::GetClientData( int n )
 162 {
 163     wxCHECK_MSG( m_widget != NULL, NULL, "invalid combobox" );
 164
 165     wxNode *node = m_clientDataList.Nth( n );
 166     if (!node) return NULL;
 167
 168     return node->Data();
 169 }
 170
 171 void wxChoice::SetClientObject( int n, wxClientData* clientData )
 172 {
 173     wxCHECK_RET( m_widget != NULL, "invalid combobox" );
 174
 175     wxNode *node = m_clientObjectList.Nth( n );
 176     if (!node) return;
 177
 178     wxClientData *cd = (wxClientData*) node->Data();
 179     if (cd) delete cd;
 180
 181     node->SetData( (wxObject*) clientData );
 182 }
 183
 184 wxClientData* wxChoice::GetClientObject( int n )
 185 {
 186     wxCHECK_MSG( m_widget != NULL, (wxClientData*) NULL, "invalid combobox" );
 187
 188     wxNode *node = m_clientObjectList.Nth( n );
 189     if (!node) return (wxClientData*) NULL;
 190
 191     return (wxClientData*) node->Data();
 192 }
 193
 194 void wxChoice::Clear()
 195 {
 196     wxCHECK_RET( m_widget != NULL, "invalid choice" );
 197
 198     gtk_option_menu_remove_menu( GTK_OPTION_MENU(m_widget) );
 199     GtkWidget *menu = gtk_menu_new();
 200     gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu );
 201
 202     wxNode *node = m_clientObjectList.First();
 203     while (node)
 204     {
 205         wxClientData *cd = (wxClientData*)node->Data();
 206         if (cd) delete cd;
 207         node = node->Next();
 208     }
 209     m_clientObjectList.Clear();
 210
 211     m_clientDataList.Clear();
 212 }
 213
 214 void wxChoice::Delete( int WXUNUSED(n) )
 215 {
 216     wxFAIL_MSG( "wxChoice:Delete not implemented" );
 217 }
 218
 219 int wxChoice::FindString( const wxString &string ) const
 220 {
 221     wxCHECK_MSG( m_widget != NULL, -1, "invalid choice" );
 222
 223     // If you read this code once and you think you understand
 224     // it, then you are very wrong. Robert Roebling.
 225
 226     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 227     int count = 0;
 228     GList *child = menu_shell->children;
 229     while (child)
 230     {
 231         GtkBin *bin = GTK_BIN( child->data );
 232         GtkLabel *label = (GtkLabel *) NULL;
 233         if (bin->child) label = GTK_LABEL(bin->child);
 234         if (!label) label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 235
 236         wxASSERT_MSG( label != NULL , "wxChoice: invalid label" );
 237
 238        if (string == label->label) return count;
 239        child = child->next;
 240        count++;
 241     }
 242
 243     wxFAIL_MSG( "wxChoice: string not found" );
 244
 245     return -1;
 246 }
 247
 248 int wxChoice::GetColumns() const
 249 {
 250     return 1;
 251 }
 252
 253 int wxChoice::GetSelection()
 254 {
 255     wxCHECK_MSG( m_widget != NULL, -1, "invalid choice" );
 256
 257     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 258     int count = 0;
 259     GList *child = menu_shell->children;
 260     while (child)
 261     {
 262         GtkBin *bin = GTK_BIN( child->data );
 263         if (!bin->child) return count;
 264         child = child->next;
 265         count++;
 266     }
 267
 268     wxFAIL_MSG( "wxChoice: no selection" );
 269
 270     return -1;
 271 }
 272
 273 wxString wxChoice::GetString( int n ) const
 274 {
 275     wxCHECK_MSG( m_widget != NULL, "", "invalid choice" );
 276
 277     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 278     int count = 0;
 279     GList *child = menu_shell->children;
 280     while (child)
 281     {
 282         GtkBin *bin = GTK_BIN( child->data );
 283         if (count == n)
 284         {
 285             GtkLabel *label = (GtkLabel *) NULL;
 286             if (bin->child) label = GTK_LABEL(bin->child);
 287             if (!label) label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 288
 289             wxASSERT_MSG( label != NULL , "wxChoice: invalid label" );
 290
 291             return label->label;
 292         }
 293         child = child->next;
 294         count++;
 295     }
 296
 297     wxFAIL_MSG( "wxChoice: string not found" );
 298
 299     return "";
 300 }
 301
 302 wxString wxChoice::GetStringSelection() const
 303 {
 304     wxCHECK_MSG( m_widget != NULL, "", "invalid choice" );
 305
 306     GtkLabel *label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 307
 308     wxASSERT_MSG( label != NULL , "wxChoice: invalid label" );
 309
 310     return label->label;
 311 }
 312
 313 int wxChoice::Number() const
 314 {
 315     wxCHECK_MSG( m_widget != NULL, 0, "invalid choice" );
 316
 317     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 318     int count = 0;
 319     GList *child = menu_shell->children;
 320     while (child)
 321     {
 322         count++;
 323         child = child->next;
 324     }
 325     return count;
 326 }
 327
 328 void wxChoice::SetColumns( int WXUNUSED(n) )
 329 {
 330 }
 331
 332 void wxChoice::SetSelection( int n )
 333 {
 334     wxCHECK_RET( m_widget != NULL, "invalid choice" );
 335
 336     int tmp = n;
 337     gtk_option_menu_set_history( GTK_OPTION_MENU(m_widget), (gint)tmp );
 338
 339     gtk_choice_clicked_callback( (GtkWidget *) NULL, this );
 340 }
 341
 342 void wxChoice::SetStringSelection( const wxString &string )
 343 {
 344     wxCHECK_RET( m_widget != NULL, "invalid choice" );
 345
 346     int n = FindString( string );
 347     if (n != -1) SetSelection( n );
 348 }
 349
 350 void wxChoice::ApplyWidgetStyle()
 351 {
 352     SetWidgetStyle();
 353
 354     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 355
 356     gtk_widget_set_style( m_widget, m_widgetStyle );
 357     gtk_widget_set_style( GTK_WIDGET( menu_shell ), m_widgetStyle );
 358
 359     GList *child = menu_shell->children;
 360     while (child)
 361     {
 362         gtk_widget_set_style( GTK_WIDGET( child->data ), m_widgetStyle );
 363
 364         GtkBin *bin = GTK_BIN( child->data );
 365         GtkWidget *label = (GtkWidget *) NULL;
 366         if (bin->child) label = bin->child;
 367         if (!label) label = GTK_BUTTON(m_widget)->child;
 368
 369         gtk_widget_set_style( label, m_widgetStyle );
 370
 371         child = child->next;
 372     }
 373 }
 374