src/gtk/combobox.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk/combobox.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 // For compilers that support precompilation, includes "wx.h".
  11 #include "wx/wxprec.h"
  12
  13 #if wxUSE_COMBOBOX
  14
  15 #include "wx/combobox.h"
  16
  17 #ifndef WX_PRECOMP
  18     #include "wx/intl.h"
  19     #include "wx/settings.h"
  20     #include "wx/textctrl.h"    // for wxEVT_COMMAND_TEXT_UPDATED
  21     #include "wx/arrstr.h"
  22 #endif
  23
  24 #include "wx/gtk/private.h"
  25
  26 // ----------------------------------------------------------------------------
  27 // GTK callbacks
  28 // ----------------------------------------------------------------------------
  29
  30 extern "C" {
  31 static void
  32 gtkcombobox_text_changed_callback( GtkWidget *WXUNUSED(widget), wxComboBox *combo )
  33 {
  34     if (!combo->m_hasVMT) return;
  35
  36     wxCommandEvent event( wxEVT_COMMAND_TEXT_UPDATED, combo->GetId() );
  37     event.SetString( combo->GetValue() );
  38     event.SetEventObject( combo );
  39     combo->HandleWindowEvent( event );
  40 }
  41
  42 static void
  43 gtkcombobox_changed_callback( GtkWidget *WXUNUSED(widget), wxComboBox *combo )
  44 {
  45     combo->SendSelectionChangedEvent(wxEVT_COMMAND_COMBOBOX_SELECTED);
  46 }
  47
  48 static void
  49 gtkcombobox_popupshown_callback(GObject *WXUNUSED(gobject),
  50                                 GParamSpec *WXUNUSED(param_spec),
  51                                 wxComboBox *combo)
  52 {
  53     gboolean isShown;
  54     g_object_get( combo->m_widget, "popup-shown", &isShown, NULL );
  55     wxCommandEvent event( isShown ? wxEVT_COMMAND_COMBOBOX_DROPDOWN
  56                                   : wxEVT_COMMAND_COMBOBOX_CLOSEUP,
  57                           combo->GetId() );
  58     event.SetEventObject( combo );
  59     combo->HandleWindowEvent( event );
  60 }
  61 }
  62
  63 //-----------------------------------------------------------------------------
  64 // wxComboBox
  65 //-----------------------------------------------------------------------------
  66
  67 IMPLEMENT_DYNAMIC_CLASS(wxComboBox, wxChoice)
  68
  69 BEGIN_EVENT_TABLE(wxComboBox, wxChoice)
  70     EVT_CHAR(wxComboBox::OnChar)
  71
  72     EVT_MENU(wxID_CUT, wxComboBox::OnCut)
  73     EVT_MENU(wxID_COPY, wxComboBox::OnCopy)
  74     EVT_MENU(wxID_PASTE, wxComboBox::OnPaste)
  75     EVT_MENU(wxID_UNDO, wxComboBox::OnUndo)
  76     EVT_MENU(wxID_REDO, wxComboBox::OnRedo)
  77     EVT_MENU(wxID_CLEAR, wxComboBox::OnDelete)
  78     EVT_MENU(wxID_SELECTALL, wxComboBox::OnSelectAll)
  79
  80     EVT_UPDATE_UI(wxID_CUT, wxComboBox::OnUpdateCut)
  81     EVT_UPDATE_UI(wxID_COPY, wxComboBox::OnUpdateCopy)
  82     EVT_UPDATE_UI(wxID_PASTE, wxComboBox::OnUpdatePaste)
  83     EVT_UPDATE_UI(wxID_UNDO, wxComboBox::OnUpdateUndo)
  84     EVT_UPDATE_UI(wxID_REDO, wxComboBox::OnUpdateRedo)
  85     EVT_UPDATE_UI(wxID_CLEAR, wxComboBox::OnUpdateDelete)
  86     EVT_UPDATE_UI(wxID_SELECTALL, wxComboBox::OnUpdateSelectAll)
  87 END_EVENT_TABLE()
  88
  89 void wxComboBox::Init()
  90 {
  91     m_entry = NULL;
  92 }
  93
  94 bool wxComboBox::Create( wxWindow *parent, wxWindowID id,
  95                          const wxString& value,
  96                          const wxPoint& pos, const wxSize& size,
  97                          const wxArrayString& choices,
  98                          long style, const wxValidator& validator,
  99                          const wxString& name )
 100 {
 101     wxCArrayString chs(choices);
 102
 103     return Create( parent, id, value, pos, size, chs.GetCount(),
 104                    chs.GetStrings(), style, validator, name );
 105 }
 106
 107 bool wxComboBox::Create( wxWindow *parent, wxWindowID id, const wxString& value,
 108                          const wxPoint& pos, const wxSize& size,
 109                          int n, const wxString choices[],
 110                          long style, const wxValidator& validator,
 111                          const wxString& name )
 112 {
 113     if (!PreCreation( parent, pos, size ) ||
 114         !CreateBase( parent, id, pos, size, style, validator, name ))
 115     {
 116         wxFAIL_MSG( wxT("wxComboBox creation failed") );
 117         return false;
 118     }
 119
 120     if (HasFlag(wxCB_SORT))
 121         m_strings = new wxGtkCollatedArrayString();
 122
 123     GTKCreateComboBoxWidget();
 124
 125     if (HasFlag(wxBORDER_NONE))
 126     {
 127         // Doesn't seem to work
 128         // g_object_set (m_widget, "has-frame", FALSE, NULL);
 129     }
 130
 131     GtkEntry * const entry = GetEntry();
 132
 133     if ( entry )
 134     {
 135         // Set it up to trigger default item on enter key press
 136         gtk_entry_set_activates_default( entry,
 137                                          !HasFlag(wxTE_PROCESS_ENTER) );
 138
 139         gtk_entry_set_editable( entry, TRUE );
 140     }
 141
 142     Append(n, choices);
 143
 144     m_parent->DoAddChild( this );
 145
 146     if ( entry )
 147         m_focusWidget = GTK_WIDGET( entry );
 148
 149     PostCreation(size);
 150
 151     if ( entry )
 152     {
 153         if (style & wxCB_READONLY)
 154         {
 155             // this will assert and do nothing if the value is not in our list
 156             // of strings which is the desired behaviour (for consistency with
 157             // wxMSW and also because it doesn't make sense to have a string
 158             // which is not a possible choice in a read-only combobox)
 159             SetStringSelection(value);
 160             gtk_entry_set_editable( entry, FALSE );
 161         }
 162         else // editable combobox
 163         {
 164             // any value is accepted, even if it's not in our list
 165             gtk_entry_set_text( entry, wxGTK_CONV(value) );
 166         }
 167
 168         g_signal_connect_after (entry, "changed",
 169                                 G_CALLBACK (gtkcombobox_text_changed_callback), this);
 170     }
 171
 172     g_signal_connect_after (m_widget, "changed",
 173                         G_CALLBACK (gtkcombobox_changed_callback), this);
 174
 175     if ( !gtk_check_version(2,10,0) )
 176     {
 177         g_signal_connect (m_widget, "notify::popup-shown",
 178                           G_CALLBACK (gtkcombobox_popupshown_callback), this);
 179     }
 180
 181     SetInitialSize(size); // need this too because this is a wxControlWithItems
 182
 183     return true;
 184 }
 185
 186 void wxComboBox::GTKCreateComboBoxWidget()
 187 {
 188     m_widget = gtk_combo_box_entry_new_text();
 189     g_object_ref(m_widget);
 190
 191     m_entry = GTK_ENTRY(GTK_BIN(m_widget)->child);
 192 }
 193
 194 GtkEditable *wxComboBox::GetEditable() const
 195 {
 196     return GTK_EDITABLE( GTK_BIN(m_widget)->child );
 197 }
 198
 199 void wxComboBox::OnChar( wxKeyEvent &event )
 200 {
 201     switch ( event.GetKeyCode() )
 202     {
 203         case WXK_RETURN:
 204             if ( HasFlag(wxTE_PROCESS_ENTER) && GetEntry() )
 205             {
 206                 // GTK automatically selects an item if its in the list
 207                 wxCommandEvent eventEnter(wxEVT_COMMAND_TEXT_ENTER, GetId());
 208                 eventEnter.SetString( GetValue() );
 209                 eventEnter.SetInt( GetSelection() );
 210                 eventEnter.SetEventObject( this );
 211
 212                 if ( HandleWindowEvent(eventEnter) )
 213                 {
 214                     // Catch GTK event so that GTK doesn't open the drop
 215                     // down list upon RETURN.
 216                     return;
 217                 }
 218             }
 219             break;
 220     }
 221
 222     event.Skip();
 223 }
 224
 225 void wxComboBox::EnableTextChangedEvents(bool enable)
 226 {
 227     if ( !GetEntry() )
 228         return;
 229
 230     if ( enable )
 231     {
 232         g_signal_handlers_unblock_by_func(GTK_BIN(m_widget)->child,
 233             (gpointer)gtkcombobox_text_changed_callback, this);
 234     }
 235     else // disable
 236     {
 237         g_signal_handlers_block_by_func(GTK_BIN(m_widget)->child,
 238             (gpointer)gtkcombobox_text_changed_callback, this);
 239     }
 240 }
 241
 242 void wxComboBox::GTKDisableEvents()
 243 {
 244     EnableTextChangedEvents(false);
 245
 246     g_signal_handlers_block_by_func(m_widget,
 247         (gpointer)gtkcombobox_changed_callback, this);
 248     g_signal_handlers_block_by_func(m_widget,
 249         (gpointer)gtkcombobox_popupshown_callback, this);
 250 }
 251
 252 void wxComboBox::GTKEnableEvents()
 253 {
 254     EnableTextChangedEvents(true);
 255
 256     g_signal_handlers_unblock_by_func(m_widget,
 257         (gpointer)gtkcombobox_changed_callback, this);
 258     g_signal_handlers_unblock_by_func(m_widget,
 259         (gpointer)gtkcombobox_popupshown_callback, this);
 260 }
 261
 262 GtkWidget* wxComboBox::GetConnectWidget()
 263 {
 264     return GTK_WIDGET( GetEntry() );
 265 }
 266
 267 GdkWindow* wxComboBox::GTKGetWindow(wxArrayGdkWindows& /* windows */) const
 268 {
 269     return GetEntry()->text_area;
 270 }
 271
 272 // static
 273 wxVisualAttributes
 274 wxComboBox::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 275 {
 276     return GetDefaultAttributesFromGTKWidget(gtk_combo_box_entry_new, true);
 277 }
 278
 279 void wxComboBox::SetValue(const wxString& value)
 280 {
 281     if ( HasFlag(wxCB_READONLY) )
 282         SetStringSelection(value);
 283     else
 284         wxTextEntry::SetValue(value);
 285 }
 286
 287 // ----------------------------------------------------------------------------
 288 // standard event handling
 289 // ----------------------------------------------------------------------------
 290
 291 void wxComboBox::OnCut(wxCommandEvent& WXUNUSED(event))
 292 {
 293     Cut();
 294 }
 295
 296 void wxComboBox::OnCopy(wxCommandEvent& WXUNUSED(event))
 297 {
 298     Copy();
 299 }
 300
 301 void wxComboBox::OnPaste(wxCommandEvent& WXUNUSED(event))
 302 {
 303     Paste();
 304 }
 305
 306 void wxComboBox::OnUndo(wxCommandEvent& WXUNUSED(event))
 307 {
 308     Undo();
 309 }
 310
 311 void wxComboBox::OnRedo(wxCommandEvent& WXUNUSED(event))
 312 {
 313     Redo();
 314 }
 315
 316 void wxComboBox::OnDelete(wxCommandEvent& WXUNUSED(event))
 317 {
 318     RemoveSelection();
 319 }
 320
 321 void wxComboBox::OnSelectAll(wxCommandEvent& WXUNUSED(event))
 322 {
 323     SelectAll();
 324 }
 325
 326 void wxComboBox::OnUpdateCut(wxUpdateUIEvent& event)
 327 {
 328     event.Enable( CanCut() );
 329 }
 330
 331 void wxComboBox::OnUpdateCopy(wxUpdateUIEvent& event)
 332 {
 333     event.Enable( CanCopy() );
 334 }
 335
 336 void wxComboBox::OnUpdatePaste(wxUpdateUIEvent& event)
 337 {
 338     event.Enable( CanPaste() );
 339 }
 340
 341 void wxComboBox::OnUpdateUndo(wxUpdateUIEvent& event)
 342 {
 343     event.Enable( CanUndo() );
 344 }
 345
 346 void wxComboBox::OnUpdateRedo(wxUpdateUIEvent& event)
 347 {
 348     event.Enable( CanRedo() );
 349 }
 350
 351 void wxComboBox::OnUpdateDelete(wxUpdateUIEvent& event)
 352 {
 353     event.Enable(HasSelection() && IsEditable()) ;
 354 }
 355
 356 void wxComboBox::OnUpdateSelectAll(wxUpdateUIEvent& event)
 357 {
 358     event.Enable(!wxTextEntry::IsEmpty());
 359 }
 360
 361 void wxComboBox::Popup()
 362 {
 363      gtk_combo_box_popup( GTK_COMBO_BOX(m_widget) );
 364 }
 365
 366 void wxComboBox::Dismiss()
 367 {
 368     gtk_combo_box_popdown( GTK_COMBO_BOX(m_widget) );
 369 }
 370 #endif // wxUSE_COMBOBOX