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 #if wxUSE_CHOICE
  18
  19 #include <gdk/gdk.h>
  20 #include <gtk/gtk.h>
  21
  22 //-----------------------------------------------------------------------------
  23 // idle system
  24 //-----------------------------------------------------------------------------
  25
  26 extern void wxapp_install_idle_handler();
  27 extern bool g_isIdle;
  28
  29 //-----------------------------------------------------------------------------
  30 // data
  31 //-----------------------------------------------------------------------------
  32
  33 extern bool   g_blockEventsOnDrag;
  34
  35 //-----------------------------------------------------------------------------
  36 // "activate"
  37 //-----------------------------------------------------------------------------
  38
  39 static void gtk_choice_clicked_callback( GtkWidget *WXUNUSED(widget), wxChoice *choice )
  40 {
  41     if (g_isIdle)
  42       wxapp_install_idle_handler();
  43
  44     if (!choice->m_hasVMT) return;
  45
  46     if (g_blockEventsOnDrag) return;
  47
  48     wxCommandEvent event(wxEVT_COMMAND_CHOICE_SELECTED, choice->GetId() );
  49     int n = choice->GetSelection();
  50
  51     event.SetInt( n );
  52     event.SetString( choice->GetStringSelection() );
  53     event.SetEventObject(choice);
  54
  55     if ( choice->HasClientObjectData() )
  56         event.SetClientObject( choice->GetClientObject(n) );
  57     else if ( choice->HasClientUntypedData() )
  58         event.SetClientData( choice->GetClientData(n) );
  59
  60     choice->GetEventHandler()->ProcessEvent(event);
  61 }
  62
  63 //-----------------------------------------------------------------------------
  64 // wxChoice
  65 //-----------------------------------------------------------------------------
  66
  67 IMPLEMENT_DYNAMIC_CLASS(wxChoice,wxControl)
  68
  69 wxChoice::wxChoice()
  70 {
  71     m_strings = (wxSortedArrayString *)NULL;
  72 }
  73
  74 bool wxChoice::Create( wxWindow *parent, wxWindowID id,
  75                        const wxPoint &pos, const wxSize &size,
  76                        int n, const wxString choices[],
  77                        long style, const wxValidator& validator, const wxString &name )
  78 {
  79     m_needParent = TRUE;
  80 #if (GTK_MINOR_VERSION > 0)
  81     m_acceptsFocus = TRUE;
  82 #endif
  83
  84     if (!PreCreation( parent, pos, size ) ||
  85         !CreateBase( parent, id, pos, size, style, validator, name ))
  86     {
  87         wxFAIL_MSG( wxT("wxChoice creation failed") );
  88         return FALSE;
  89     }
  90
  91     m_widget = gtk_option_menu_new();
  92
  93     if ( style & wxCB_SORT )
  94     {
  95         // if our m_strings != NULL, DoAppend() will check for it and insert
  96         // items in the correct order
  97         m_strings = new wxSortedArrayString;
  98     }
  99
 100     GtkWidget *menu = gtk_menu_new();
 101
 102     for (int i = 0; i < n; i++)
 103     {
 104         GtkAppendHelper(menu, choices[i]);
 105     }
 106
 107     gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu );
 108
 109     m_parent->DoAddChild( this );
 110
 111     PostCreation();
 112
 113     SetFont( parent->GetFont() );
 114
 115     wxSize size_best( DoGetBestSize() );
 116     wxSize new_size( size );
 117     if (new_size.x == -1)
 118         new_size.x = size_best.x;
 119     if (new_size.y == -1)
 120         new_size.y = size_best.y;
 121     if ((new_size.x != size.x) || (new_size.y != size.y))
 122         SetSize( new_size.x, new_size.y );
 123
 124     SetBackgroundColour( parent->GetBackgroundColour() );
 125     SetForegroundColour( parent->GetForegroundColour() );
 126
 127     Show( TRUE );
 128
 129     return TRUE;
 130 }
 131
 132 wxChoice::~wxChoice()
 133 {
 134     Clear();
 135
 136     delete m_strings;
 137 }
 138
 139 int wxChoice::DoAppend( const wxString &item )
 140 {
 141     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid choice control") );
 142
 143     GtkWidget *menu = gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) );
 144
 145     return GtkAppendHelper(menu, item);
 146 }
 147
 148 void wxChoice::DoSetItemClientData( int n, void* clientData )
 149 {
 150     wxCHECK_RET( m_widget != NULL, wxT("invalid choice control") );
 151
 152     wxNode *node = m_clientList.Nth( n );
 153     wxCHECK_RET( node, wxT("invalid index in wxChoice::DoSetItemClientData") );
 154
 155     node->SetData( (wxObject*) clientData );
 156 }
 157
 158 void* wxChoice::DoGetItemClientData( int n ) const
 159 {
 160     wxCHECK_MSG( m_widget != NULL, NULL, wxT("invalid choice control") );
 161
 162     wxNode *node = m_clientList.Nth( n );
 163     wxCHECK_MSG( node, NULL, wxT("invalid index in wxChoice::DoGetItemClientData") );
 164
 165     return node->Data();
 166 }
 167
 168 void wxChoice::DoSetItemClientObject( int n, wxClientData* clientData )
 169 {
 170     wxCHECK_RET( m_widget != NULL, wxT("invalid choice control") );
 171
 172     wxNode *node = m_clientList.Nth( n );
 173     wxCHECK_RET( node, wxT("invalid index in wxChoice::DoSetItemClientObject") );
 174
 175     wxClientData *cd = (wxClientData*) node->Data();
 176     delete cd;
 177
 178     node->SetData( (wxObject*) clientData );
 179 }
 180
 181 wxClientData* wxChoice::DoGetItemClientObject( int n ) const
 182 {
 183     wxCHECK_MSG( m_widget != NULL, (wxClientData*) NULL, wxT("invalid choice control") );
 184
 185     wxNode *node = m_clientList.Nth( n );
 186     wxCHECK_MSG( node, (wxClientData *)NULL,
 187                  wxT("invalid index in wxChoice::DoGetItemClientObject") );
 188
 189     return (wxClientData*) node->Data();
 190 }
 191
 192 void wxChoice::Clear()
 193 {
 194     wxCHECK_RET( m_widget != NULL, wxT("invalid choice") );
 195
 196     gtk_option_menu_remove_menu( GTK_OPTION_MENU(m_widget) );
 197     GtkWidget *menu = gtk_menu_new();
 198     gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu );
 199
 200     if ( HasClientObjectData() )
 201     {
 202         // destroy the data (due to Robert's idea of using wxList<wxObject>
 203         // and not wxList<wxClientData> we can't just say
 204         // m_clientList.DeleteContents(TRUE) - this would crash!
 205         wxNode *node = m_clientList.First();
 206         while ( node )
 207         {
 208             delete (wxClientData *)node->Data();
 209             node = node->Next();
 210         }
 211     }
 212     m_clientList.Clear();
 213
 214     if ( m_strings )
 215         m_strings->Clear();
 216 }
 217
 218 void wxChoice::Delete( int WXUNUSED(n) )
 219 {
 220     wxFAIL_MSG( wxT("wxChoice:Delete not implemented") );
 221 }
 222
 223 int wxChoice::FindString( const wxString &string ) const
 224 {
 225     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid choice") );
 226
 227     // If you read this code once and you think you understand
 228     // it, then you are very wrong. Robert Roebling.
 229
 230     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 231     int count = 0;
 232     GList *child = menu_shell->children;
 233     while (child)
 234     {
 235         GtkBin *bin = GTK_BIN( child->data );
 236         GtkLabel *label = (GtkLabel *) NULL;
 237         if (bin->child) label = GTK_LABEL(bin->child);
 238         if (!label) label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 239
 240         wxASSERT_MSG( label != NULL , wxT("wxChoice: invalid label") );
 241
 242        if (string == wxString(label->label,*wxConvCurrent))
 243            return count;
 244
 245        child = child->next;
 246        count++;
 247     }
 248
 249     return -1;
 250 }
 251
 252 int wxChoice::GetSelection() const
 253 {
 254     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid choice") );
 255
 256     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 257     int count = 0;
 258     GList *child = menu_shell->children;
 259     while (child)
 260     {
 261         GtkBin *bin = GTK_BIN( child->data );
 262         if (!bin->child) return count;
 263         child = child->next;
 264         count++;
 265     }
 266
 267     return -1;
 268 }
 269
 270 void wxChoice::SetString( int WXUNUSED(n), const wxString& WXUNUSED(string) )
 271 {
 272     wxCHECK_RET( m_widget != NULL, wxT("invalid choice") );
 273
 274     wxFAIL_MSG(wxT("not implemented"));
 275 }
 276
 277 wxString wxChoice::GetString( int n ) const
 278 {
 279     wxCHECK_MSG( m_widget != NULL, wxT(""), wxT("invalid choice") );
 280
 281     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 282     int count = 0;
 283     GList *child = menu_shell->children;
 284     while (child)
 285     {
 286         GtkBin *bin = GTK_BIN( child->data );
 287         if (count == n)
 288         {
 289             GtkLabel *label = (GtkLabel *) NULL;
 290             if (bin->child) label = GTK_LABEL(bin->child);
 291             if (!label) label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 292
 293             wxASSERT_MSG( label != NULL , wxT("wxChoice: invalid label") );
 294
 295             return wxString(label->label,*wxConvCurrent);
 296         }
 297         child = child->next;
 298         count++;
 299     }
 300
 301     wxFAIL_MSG( wxT("wxChoice: invalid index in GetString()") );
 302
 303     return wxT("");
 304 }
 305
 306 int wxChoice::GetCount() const
 307 {
 308     wxCHECK_MSG( m_widget != NULL, 0, wxT("invalid choice") );
 309
 310     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 311     int count = 0;
 312     GList *child = menu_shell->children;
 313     while (child)
 314     {
 315         count++;
 316         child = child->next;
 317     }
 318     return count;
 319 }
 320
 321 void wxChoice::SetSelection( int n )
 322 {
 323     wxCHECK_RET( m_widget != NULL, wxT("invalid choice") );
 324
 325     int tmp = n;
 326     gtk_option_menu_set_history( GTK_OPTION_MENU(m_widget), (gint)tmp );
 327 }
 328
 329 void wxChoice::ApplyWidgetStyle()
 330 {
 331     SetWidgetStyle();
 332
 333     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 334
 335     gtk_widget_set_style( m_widget, m_widgetStyle );
 336     gtk_widget_set_style( GTK_WIDGET( menu_shell ), m_widgetStyle );
 337
 338     GList *child = menu_shell->children;
 339     while (child)
 340     {
 341         gtk_widget_set_style( GTK_WIDGET( child->data ), m_widgetStyle );
 342
 343         GtkBin *bin = GTK_BIN( child->data );
 344         GtkWidget *label = (GtkWidget *) NULL;
 345         if (bin->child) label = bin->child;
 346         if (!label) label = GTK_BUTTON(m_widget)->child;
 347
 348         gtk_widget_set_style( label, m_widgetStyle );
 349
 350         child = child->next;
 351     }
 352 }
 353
 354 size_t wxChoice::GtkAppendHelper(GtkWidget *menu, const wxString& item)
 355 {
 356     GtkWidget *menu_item = gtk_menu_item_new_with_label( item.mbc_str() );
 357
 358     size_t index;
 359     if ( m_strings )
 360     {
 361         // sorted control, need to insert at the correct index
 362         index = m_strings->Add(item);
 363
 364         gtk_menu_insert( GTK_MENU(menu), menu_item, index );
 365
 366         if ( index )
 367         {
 368             m_clientList.Insert( m_clientList.Item(index - 1),
 369                                  (wxObject*) NULL );
 370         }
 371         else
 372         {
 373             m_clientList.Insert( (wxObject*) NULL );
 374         }
 375     }
 376     else
 377     {
 378         // normal control, just append
 379         gtk_menu_append( GTK_MENU(menu), menu_item );
 380
 381         m_clientList.Append( (wxObject*) NULL );
 382
 383         // don't call wxChoice::GetCount() from here because it doesn't work
 384         // if we're called from ctor (and GtkMenuShell is still NULL)
 385         index = m_clientList.GetCount() - 1;
 386     }
 387
 388     if (GTK_WIDGET_REALIZED(m_widget))
 389     {
 390         gtk_widget_realize( menu_item );
 391         gtk_widget_realize( GTK_BIN(menu_item)->child );
 392
 393         if (m_widgetStyle) ApplyWidgetStyle();
 394     }
 395
 396     gtk_signal_connect( GTK_OBJECT( menu_item ), "activate",
 397       GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );
 398
 399     gtk_widget_show( menu_item );
 400
 401     // return the index of the item in the control
 402     return index;
 403 }
 404
 405 wxSize wxChoice::DoGetBestSize() const
 406 {
 407     wxSize ret( wxControl::DoGetBestSize() );
 408     if (ret.x < 80) ret.x = 80;
 409     ret.y = 16 + gdk_char_height( m_widget->style->font, 'H' );
 410     return ret;
 411 }
 412
 413 #endif