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())
  33       return;
  34
  35   if (g_blockEventsOnDrag)
  36       return;
  37
  38   wxCommandEvent event(wxEVT_COMMAND_CHOICE_SELECTED, choice->GetId() );
  39   event.SetInt( choice->GetSelection() );
  40   event.SetString( choice->GetStringSelection() );
  41   event.SetEventObject(choice);
  42   choice->GetEventHandler()->ProcessEvent(event);
  43 }
  44
  45 //-----------------------------------------------------------------------------
  46 // wxChoice
  47 //-----------------------------------------------------------------------------
  48
  49 IMPLEMENT_DYNAMIC_CLASS(wxChoice,wxControl)
  50
  51 wxChoice::wxChoice()
  52 {
  53 }
  54
  55 bool wxChoice::Create( wxWindow *parent, wxWindowID id,
  56                        const wxPoint &pos, const wxSize &size,
  57                        int n, const wxString choices[],
  58                        long style, const wxValidator& validator, const wxString &name )
  59 {
  60     m_needParent = TRUE;
  61 #if (GTK_MINOR_VERSION > 0)
  62     m_acceptsFocus = TRUE;
  63 #endif
  64
  65     PreCreation( parent, id, pos, size, style, name );
  66
  67     SetValidator( validator );
  68
  69     m_widget = gtk_option_menu_new();
  70
  71     wxSize newSize(size);
  72     if (newSize.x == -1)
  73         newSize.x = 80;
  74     if (newSize.y == -1)
  75         newSize.y = 26;
  76     SetSize( newSize.x, newSize.y );
  77
  78     GtkWidget *menu = gtk_menu_new();
  79
  80     for (int i = 0; i < n; i++)
  81     {
  82         m_clientDataList.Append( (wxObject*) NULL );
  83         m_clientObjectList.Append( (wxObject*) NULL );
  84
  85         GtkWidget *item = gtk_menu_item_new_with_label( choices[i] );
  86         gtk_menu_append( GTK_MENU(menu), item );
  87
  88         gtk_widget_realize( item );
  89         gtk_widget_realize( GTK_BIN(item)->child );
  90
  91         gtk_widget_show( item );
  92
  93         gtk_signal_connect( GTK_OBJECT( item ), "activate",
  94           GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );
  95     }
  96     gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu );
  97
  98     m_parent->AddChild( this );
  99
 100     (m_parent->m_insertCallback)( m_parent, this );
 101
 102     PostCreation();
 103
 104     SetBackgroundColour( parent->GetBackgroundColour() );
 105     SetForegroundColour( parent->GetForegroundColour() );
 106     SetFont( parent->GetFont() );
 107
 108     Show( TRUE );
 109
 110     return TRUE;
 111 }
 112
 113 wxChoice::~wxChoice()
 114 {
 115     Clear();
 116 }
 117
 118 void wxChoice::AppendCommon( const wxString &item )
 119 {
 120     wxCHECK_RET( m_widget != NULL, "invalid choice" );
 121
 122     GtkWidget *menu = gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) );
 123     GtkWidget *menu_item = gtk_menu_item_new_with_label( item );
 124
 125     gtk_menu_append( GTK_MENU(menu), menu_item );
 126
 127     gtk_widget_realize( menu_item );
 128     gtk_widget_realize( GTK_BIN(menu_item)->child );
 129
 130     if (m_widgetStyle) ApplyWidgetStyle();
 131
 132     gtk_signal_connect( GTK_OBJECT( menu_item ), "activate",
 133       GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );
 134
 135     gtk_widget_show( menu_item );
 136 }
 137
 138 void wxChoice::Append( const wxString &item )
 139 {
 140     m_clientDataList.Append( (wxObject*) NULL );
 141     m_clientObjectList.Append( (wxObject*) NULL );
 142
 143     AppendCommon( item );
 144 }
 145
 146 void wxChoice::Append( const wxString &item, void *clientData )
 147 {
 148     m_clientDataList.Append( (wxObject*) clientData );
 149     m_clientObjectList.Append( (wxObject*) NULL );
 150
 151     AppendCommon( item );
 152 }
 153
 154 void wxChoice::Append( const wxString &item, wxClientData *clientData )
 155 {
 156     m_clientObjectList.Append( (wxObject*) clientData );
 157     m_clientDataList.Append( (wxObject*) NULL );
 158
 159     AppendCommon( item );
 160 }
 161
 162 void wxChoice::SetClientData( int n, void* clientData )
 163 {
 164     wxCHECK_RET( m_widget != NULL, "invalid combobox" );
 165
 166     wxNode *node = m_clientDataList.Nth( n );
 167     if (!node) return;
 168
 169     node->SetData( (wxObject*) clientData );
 170 }
 171
 172 void* wxChoice::GetClientData( int n )
 173 {
 174     wxCHECK_MSG( m_widget != NULL, NULL, "invalid combobox" );
 175
 176     wxNode *node = m_clientDataList.Nth( n );
 177     if (!node) return NULL;
 178
 179     return node->Data();
 180 }
 181
 182 void wxChoice::SetClientObject( int n, wxClientData* clientData )
 183 {
 184     wxCHECK_RET( m_widget != NULL, "invalid combobox" );
 185
 186     wxNode *node = m_clientObjectList.Nth( n );
 187     if (!node) return;
 188
 189     wxClientData *cd = (wxClientData*) node->Data();
 190     if (cd) delete cd;
 191
 192     node->SetData( (wxObject*) clientData );
 193 }
 194
 195 wxClientData* wxChoice::GetClientObject( int n )
 196 {
 197     wxCHECK_MSG( m_widget != NULL, (wxClientData*) NULL, "invalid combobox" );
 198
 199     wxNode *node = m_clientObjectList.Nth( n );
 200     if (!node) return (wxClientData*) NULL;
 201
 202     return (wxClientData*) node->Data();
 203 }
 204
 205 void wxChoice::Clear()
 206 {
 207     wxCHECK_RET( m_widget != NULL, "invalid choice" );
 208
 209     gtk_option_menu_remove_menu( GTK_OPTION_MENU(m_widget) );
 210     GtkWidget *menu = gtk_menu_new();
 211     gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu );
 212
 213     wxNode *node = m_clientObjectList.First();
 214     while (node)
 215     {
 216         wxClientData *cd = (wxClientData*)node->Data();
 217         if (cd) delete cd;
 218         node = node->Next();
 219     }
 220     m_clientObjectList.Clear();
 221
 222     m_clientDataList.Clear();
 223 }
 224
 225 void wxChoice::Delete( int WXUNUSED(n) )
 226 {
 227     wxFAIL_MSG( "wxChoice:Delete not implemented" );
 228 }
 229
 230 int wxChoice::FindString( const wxString &string ) const
 231 {
 232     wxCHECK_MSG( m_widget != NULL, -1, "invalid choice" );
 233
 234     // If you read this code once and you think you understand
 235     // it, then you are very wrong. Robert Roebling.
 236
 237     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 238     int count = 0;
 239     GList *child = menu_shell->children;
 240     while (child)
 241     {
 242         GtkBin *bin = GTK_BIN( child->data );
 243         GtkLabel *label = (GtkLabel *) NULL;
 244         if (bin->child) label = GTK_LABEL(bin->child);
 245         if (!label) label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 246
 247         wxASSERT_MSG( label != NULL , "wxChoice: invalid label" );
 248
 249        if (string == label->label)
 250            return count;
 251
 252        child = child->next;
 253        count++;
 254     }
 255
 256     return -1;
 257 }
 258
 259 int wxChoice::GetColumns() const
 260 {
 261     return 1;
 262 }
 263
 264 int wxChoice::GetSelection()
 265 {
 266     wxCHECK_MSG( m_widget != NULL, -1, "invalid choice" );
 267
 268     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 269     int count = 0;
 270     GList *child = menu_shell->children;
 271     while (child)
 272     {
 273         GtkBin *bin = GTK_BIN( child->data );
 274         if (!bin->child) return count;
 275         child = child->next;
 276         count++;
 277     }
 278
 279     wxFAIL_MSG( "wxChoice: no selection" );
 280
 281     return -1;
 282 }
 283
 284 wxString wxChoice::GetString( int n ) const
 285 {
 286     wxCHECK_MSG( m_widget != NULL, "", "invalid choice" );
 287
 288     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 289     int count = 0;
 290     GList *child = menu_shell->children;
 291     while (child)
 292     {
 293         GtkBin *bin = GTK_BIN( child->data );
 294         if (count == n)
 295         {
 296             GtkLabel *label = (GtkLabel *) NULL;
 297             if (bin->child) label = GTK_LABEL(bin->child);
 298             if (!label) label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 299
 300             wxASSERT_MSG( label != NULL , "wxChoice: invalid label" );
 301
 302             return label->label;
 303         }
 304         child = child->next;
 305         count++;
 306     }
 307
 308     wxFAIL_MSG( "wxChoice: invalid index in GetString()" );
 309
 310     return "";
 311 }
 312
 313 wxString wxChoice::GetStringSelection() const
 314 {
 315     wxCHECK_MSG( m_widget != NULL, "", "invalid choice" );
 316
 317     GtkLabel *label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 318
 319     wxASSERT_MSG( label != NULL , "wxChoice: invalid label" );
 320
 321     return label->label;
 322 }
 323
 324 int wxChoice::Number() const
 325 {
 326     wxCHECK_MSG( m_widget != NULL, 0, "invalid choice" );
 327
 328     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 329     int count = 0;
 330     GList *child = menu_shell->children;
 331     while (child)
 332     {
 333         count++;
 334         child = child->next;
 335     }
 336     return count;
 337 }
 338
 339 void wxChoice::SetColumns( int WXUNUSED(n) )
 340 {
 341 }
 342
 343 void wxChoice::SetSelection( int n )
 344 {
 345     wxCHECK_RET( m_widget != NULL, "invalid choice" );
 346
 347     int tmp = n;
 348     gtk_option_menu_set_history( GTK_OPTION_MENU(m_widget), (gint)tmp );
 349
 350     gtk_choice_clicked_callback( (GtkWidget *) NULL, this );
 351 }
 352
 353 void wxChoice::SetStringSelection( const wxString &string )
 354 {
 355     wxCHECK_RET( m_widget != NULL, "invalid choice" );
 356
 357     int n = FindString( string );
 358     if (n != -1) SetSelection( n );
 359 }
 360
 361 void wxChoice::ApplyWidgetStyle()
 362 {
 363     SetWidgetStyle();
 364
 365     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 366
 367     gtk_widget_set_style( m_widget, m_widgetStyle );
 368     gtk_widget_set_style( GTK_WIDGET( menu_shell ), m_widgetStyle );
 369
 370     GList *child = menu_shell->children;
 371     while (child)
 372     {
 373         gtk_widget_set_style( GTK_WIDGET( child->data ), m_widgetStyle );
 374
 375         GtkBin *bin = GTK_BIN( child->data );
 376         GtkWidget *label = (GtkWidget *) NULL;
 377         if (bin->child) label = bin->child;
 378         if (!label) label = GTK_BUTTON(m_widget)->child;
 379
 380         gtk_widget_set_style( label, m_widgetStyle );
 381
 382         child = child->next;
 383     }
 384 }
 385