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 #include "gdk/gdk.h"
  18 #include "gtk/gtk.h"
  19
  20 //-----------------------------------------------------------------------------
  21 // data
  22 //-----------------------------------------------------------------------------
  23
  24 extern bool   g_blockEventsOnDrag;
  25
  26 //-----------------------------------------------------------------------------
  27 // "activate"
  28 //-----------------------------------------------------------------------------
  29
  30 static void gtk_choice_clicked_callback( GtkWidget *WXUNUSED(widget), wxChoice *choice )
  31 {
  32   if (!choice->HasVMT()) return;
  33   if (g_blockEventsOnDrag) return;
  34
  35   wxCommandEvent event(wxEVT_COMMAND_CHOICE_SELECTED, choice->GetId() );
  36   event.SetInt( choice->GetSelection() );
  37   wxString tmp( choice->GetStringSelection() );
  38   event.SetString( WXSTRINGCAST(tmp) );
  39   event.SetEventObject(choice);
  40   choice->GetEventHandler()->ProcessEvent(event);
  41 }
  42
  43 //-----------------------------------------------------------------------------
  44 // wxChoice
  45 //-----------------------------------------------------------------------------
  46
  47 IMPLEMENT_DYNAMIC_CLASS(wxChoice,wxControl)
  48
  49 wxChoice::wxChoice()
  50 {
  51 }
  52
  53 bool wxChoice::Create( wxWindow *parent, wxWindowID id,
  54                        const wxPoint &pos, const wxSize &size,
  55                        int n, const wxString choices[],
  56                        long style, const wxValidator& validator, const wxString &name )
  57 {
  58     m_needParent = TRUE;
  59
  60     PreCreation( parent, id, pos, size, style, name );
  61
  62     SetValidator( validator );
  63
  64     m_widget = gtk_option_menu_new();
  65
  66     wxSize newSize = size;
  67     if (newSize.x == -1) newSize.x = 80;
  68     if (newSize.y == -1) newSize.y = 26;
  69     SetSize( newSize.x, newSize.y );
  70
  71     GtkWidget *menu = gtk_menu_new();
  72
  73     for (int i = 0; i < n; i++)
  74     {
  75         m_clientDataList.Append( (wxObject*) NULL );
  76         m_clientObjectList.Append( (wxObject*) NULL );
  77
  78         GtkWidget *item = gtk_menu_item_new_with_label( choices[i] );
  79         gtk_menu_append( GTK_MENU(menu), item );
  80
  81         gtk_widget_realize( item );
  82         gtk_widget_realize( GTK_BIN(item)->child );
  83
  84         gtk_widget_show( item );
  85
  86         gtk_signal_connect( GTK_OBJECT( item ), "activate",
  87           GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );
  88     }
  89     gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu );
  90
  91     m_parent->AddChild( this );
  92
  93     (m_parent->m_insertCallback)( m_parent, this );
  94
  95     PostCreation();
  96
  97     SetBackgroundColour( parent->GetBackgroundColour() );
  98     SetForegroundColour( parent->GetForegroundColour() );
  99
 100     Show( TRUE );
 101
 102     return TRUE;
 103 }
 104
 105 wxChoice::~wxChoice()
 106 {
 107     Clear();
 108 }
 109
 110 void wxChoice::AppendCommon( const wxString &item )
 111 {
 112     wxCHECK_RET( m_widget != NULL, "invalid choice" );
 113
 114     GtkWidget *menu = gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) );
 115     GtkWidget *menu_item = gtk_menu_item_new_with_label( item );
 116
 117     gtk_menu_append( GTK_MENU(menu), menu_item );
 118
 119     gtk_widget_realize( menu_item );
 120     gtk_widget_realize( GTK_BIN(menu_item)->child );
 121
 122     if (m_widgetStyle) ApplyWidgetStyle();
 123
 124     gtk_signal_connect( GTK_OBJECT( menu_item ), "activate",
 125       GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );
 126
 127     gtk_widget_show( menu_item );
 128 }
 129
 130 void wxChoice::Append( const wxString &item )
 131 {
 132     m_clientDataList.Append( (wxObject*) NULL );
 133     m_clientObjectList.Append( (wxObject*) NULL );
 134
 135     AppendCommon( item );
 136 }
 137
 138 void wxChoice::Append( const wxString &item, void *clientData )
 139 {
 140     m_clientDataList.Append( (wxObject*) clientData );
 141     m_clientObjectList.Append( (wxObject*) NULL );
 142
 143     AppendCommon( item );
 144 }
 145
 146 void wxChoice::Append( const wxString &item, wxClientData *clientData )
 147 {
 148     m_clientObjectList.Append( (wxObject*) clientData );
 149     m_clientDataList.Append( (wxObject*) NULL );
 150
 151     AppendCommon( item );
 152 }
 153
 154 void wxChoice::SetClientData( int n, void* clientData )
 155 {
 156     wxCHECK_RET( m_widget != NULL, "invalid combobox" );
 157
 158     wxNode *node = m_clientDataList.Nth( n );
 159     if (!node) return;
 160
 161     node->SetData( (wxObject*) clientData );
 162 }
 163
 164 void* wxChoice::GetClientData( int n )
 165 {
 166     wxCHECK_MSG( m_widget != NULL, NULL, "invalid combobox" );
 167
 168     wxNode *node = m_clientDataList.Nth( n );
 169     if (!node) return NULL;
 170
 171     return node->Data();
 172 }
 173
 174 void wxChoice::SetClientObject( int n, wxClientData* clientData )
 175 {
 176     wxCHECK_RET( m_widget != NULL, "invalid combobox" );
 177
 178     wxNode *node = m_clientObjectList.Nth( n );
 179     if (!node) return;
 180
 181     wxClientData *cd = (wxClientData*) node->Data();
 182     if (cd) delete cd;
 183
 184     node->SetData( (wxObject*) clientData );
 185 }
 186
 187 wxClientData* wxChoice::GetClientObject( int n )
 188 {
 189     wxCHECK_MSG( m_widget != NULL, (wxClientData*) NULL, "invalid combobox" );
 190
 191     wxNode *node = m_clientObjectList.Nth( n );
 192     if (!node) return (wxClientData*) NULL;
 193
 194     return (wxClientData*) node->Data();
 195 }
 196
 197 void wxChoice::Clear()
 198 {
 199     wxCHECK_RET( m_widget != NULL, "invalid choice" );
 200
 201     gtk_option_menu_remove_menu( GTK_OPTION_MENU(m_widget) );
 202     GtkWidget *menu = gtk_menu_new();
 203     gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu );
 204
 205     wxNode *node = m_clientObjectList.First();
 206     while (node)
 207     {
 208         wxClientData *cd = (wxClientData*)node->Data();
 209         if (cd) delete cd;
 210         node = node->Next();
 211     }
 212     m_clientObjectList.Clear();
 213
 214     m_clientDataList.Clear();
 215 }
 216
 217 void wxChoice::Delete( int WXUNUSED(n) )
 218 {
 219     wxFAIL_MSG( "wxChoice:Delete not implemented" );
 220 }
 221
 222 int wxChoice::FindString( const wxString &string ) const
 223 {
 224     wxCHECK_MSG( m_widget != NULL, -1, "invalid choice" );
 225
 226     // If you read this code once and you think you understand
 227     // it, then you are very wrong. Robert Roebling.
 228
 229     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 230     int count = 0;
 231     GList *child = menu_shell->children;
 232     while (child)
 233     {
 234         GtkBin *bin = GTK_BIN( child->data );
 235         GtkLabel *label = (GtkLabel *) NULL;
 236         if (bin->child) label = GTK_LABEL(bin->child);
 237         if (!label) label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 238
 239         wxASSERT_MSG( label != NULL , "wxChoice: invalid label" );
 240
 241        if (string == label->label) return count;
 242        child = child->next;
 243        count++;
 244     }
 245
 246     wxFAIL_MSG( "wxChoice: string not found" );
 247
 248     return -1;
 249 }
 250
 251 int wxChoice::GetColumns() const
 252 {
 253     return 1;
 254 }
 255
 256 int wxChoice::GetSelection()
 257 {
 258     wxCHECK_MSG( m_widget != NULL, -1, "invalid choice" );
 259
 260     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 261     int count = 0;
 262     GList *child = menu_shell->children;
 263     while (child)
 264     {
 265         GtkBin *bin = GTK_BIN( child->data );
 266         if (!bin->child) return count;
 267         child = child->next;
 268         count++;
 269     }
 270
 271     wxFAIL_MSG( "wxChoice: no selection" );
 272
 273     return -1;
 274 }
 275
 276 wxString wxChoice::GetString( int n ) const
 277 {
 278     wxCHECK_MSG( m_widget != NULL, "", "invalid choice" );
 279
 280     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 281     int count = 0;
 282     GList *child = menu_shell->children;
 283     while (child)
 284     {
 285         GtkBin *bin = GTK_BIN( child->data );
 286         if (count == n)
 287         {
 288             GtkLabel *label = (GtkLabel *) NULL;
 289             if (bin->child) label = GTK_LABEL(bin->child);
 290             if (!label) label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 291
 292             wxASSERT_MSG( label != NULL , "wxChoice: invalid label" );
 293
 294             return label->label;
 295         }
 296         child = child->next;
 297         count++;
 298     }
 299
 300     wxFAIL_MSG( "wxChoice: string not found" );
 301
 302     return "";
 303 }
 304
 305 wxString wxChoice::GetStringSelection() const
 306 {
 307     wxCHECK_MSG( m_widget != NULL, "", "invalid choice" );
 308
 309     GtkLabel *label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 310
 311     wxASSERT_MSG( label != NULL , "wxChoice: invalid label" );
 312
 313     return label->label;
 314 }
 315
 316 int wxChoice::Number() const
 317 {
 318     wxCHECK_MSG( m_widget != NULL, 0, "invalid choice" );
 319
 320     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 321     int count = 0;
 322     GList *child = menu_shell->children;
 323     while (child)
 324     {
 325         count++;
 326         child = child->next;
 327     }
 328     return count;
 329 }
 330
 331 void wxChoice::SetColumns( int WXUNUSED(n) )
 332 {
 333 }
 334
 335 void wxChoice::SetSelection( int n )
 336 {
 337     wxCHECK_RET( m_widget != NULL, "invalid choice" );
 338
 339     int tmp = n;
 340     gtk_option_menu_set_history( GTK_OPTION_MENU(m_widget), (gint)tmp );
 341
 342     gtk_choice_clicked_callback( (GtkWidget *) NULL, this );
 343 }
 344
 345 void wxChoice::SetStringSelection( const wxString &string )
 346 {
 347     wxCHECK_RET( m_widget != NULL, "invalid choice" );
 348
 349     int n = FindString( string );
 350     if (n != -1) SetSelection( n );
 351 }
 352
 353 void wxChoice::ApplyWidgetStyle()
 354 {
 355     SetWidgetStyle();
 356
 357     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 358
 359     gtk_widget_set_style( m_widget, m_widgetStyle );
 360     gtk_widget_set_style( GTK_WIDGET( menu_shell ), m_widgetStyle );
 361
 362     GList *child = menu_shell->children;
 363     while (child)
 364     {
 365         gtk_widget_set_style( GTK_WIDGET( child->data ), m_widgetStyle );
 366
 367         GtkBin *bin = GTK_BIN( child->data );
 368         GtkWidget *label = (GtkWidget *) NULL;
 369         if (bin->child) label = bin->child;
 370         if (!label) label = GTK_BUTTON(m_widget)->child;
 371
 372         gtk_widget_set_style( label, m_widgetStyle );
 373
 374         child = child->next;
 375     }
 376 }
 377