src/gtk1/choice.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        choice.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Created:     01/02/97
   6 // Id:
   7 // Copyright:   (c) 1998 Robert Roebling, Julian Smart and Markus Holzem
   8 // Licence:     wxWindows licence
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11
  12 #ifdef __GNUG__
  13 #pragma implementation "choice.h"
  14 #endif
  15
  16 #include "wx/choice.h"
  17
  18 //-----------------------------------------------------------------------------
  19 // data
  20 //-----------------------------------------------------------------------------
  21
  22 extern bool   g_blockEventsOnDrag;
  23
  24 //-----------------------------------------------------------------------------
  25 // wxChoice
  26 //-----------------------------------------------------------------------------
  27
  28 static void gtk_choice_clicked_callback( GtkWidget *WXUNUSED(widget), wxChoice *choice )
  29 {
  30   if (!choice->HasVMT()) return;
  31   if (g_blockEventsOnDrag) return;
  32
  33   wxCommandEvent event(wxEVT_COMMAND_CHOICE_SELECTED, choice->GetId() );
  34   event.SetInt( choice->GetSelection() );
  35   wxString tmp( choice->GetStringSelection() );
  36   event.SetString( WXSTRINGCAST(tmp) );
  37   event.SetEventObject(choice);
  38   choice->GetEventHandler()->ProcessEvent(event);
  39 }
  40
  41 //-----------------------------------------------------------------------------
  42
  43 IMPLEMENT_DYNAMIC_CLASS(wxChoice,wxControl)
  44
  45 wxChoice::wxChoice(void)
  46 {
  47 }
  48
  49 bool wxChoice::Create( wxWindow *parent, wxWindowID id,
  50       const wxPoint &pos, const wxSize &size,
  51       int n, const wxString choices[],
  52       long style, const wxValidator& validator, const wxString &name )
  53 {
  54   m_needParent = TRUE;
  55
  56   PreCreation( parent, id, pos, size, style, name );
  57
  58   SetValidator( validator );
  59
  60   m_widget = gtk_option_menu_new();
  61
  62   wxSize newSize = size;
  63   if (newSize.x == -1) newSize.x = 80;
  64   if (newSize.y == -1) newSize.y = 26;
  65   SetSize( newSize.x, newSize.y );
  66
  67   GtkWidget *menu;
  68   menu = gtk_menu_new();
  69
  70   for (int i = 0; i < n; i++)
  71   {
  72     GtkWidget *item;
  73     item = gtk_menu_item_new_with_label( choices[i] );
  74     gtk_signal_connect( GTK_OBJECT( item ), "activate",
  75       GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );
  76     gtk_menu_append( GTK_MENU(menu), item );
  77     gtk_widget_show( item );
  78   }
  79   gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu );
  80
  81   PostCreation();
  82
  83   Show( TRUE );
  84
  85   return TRUE;
  86 }
  87
  88 void wxChoice::Append( const wxString &item )
  89 {
  90   GtkWidget *menu = gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) );
  91   GtkWidget *menu_item;
  92   menu_item = gtk_menu_item_new_with_label( item );
  93   gtk_signal_connect( GTK_OBJECT( menu_item ), "activate",
  94     GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );
  95   gtk_menu_append( GTK_MENU(menu), menu_item );
  96   gtk_widget_show( menu_item );
  97 }
  98
  99 void wxChoice::Clear(void)
 100 {
 101   gtk_option_menu_remove_menu( GTK_OPTION_MENU(m_widget) );
 102   GtkWidget *menu = gtk_menu_new();
 103   gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu );
 104 }
 105
 106 void wxChoice::Delete( int WXUNUSED(n) )
 107 {
 108   wxFAIL_MSG( "wxChoice:Delete not implemented" );
 109 }
 110
 111 int wxChoice::FindString( const wxString &string ) const
 112 {
 113   // If you read this code once and you think you understand
 114   // it, then you are very wrong. Robert Roebling.
 115
 116   GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 117   int count = 0;
 118   GList *child = menu_shell->children;
 119   while (child)
 120   {
 121     GtkBin *bin = GTK_BIN( child->data );
 122     GtkLabel *label = (GtkLabel *) NULL;
 123     if (bin->child) label = GTK_LABEL(bin->child);
 124
 125     wxASSERT_MSG( label != NULL , "wxChoice: invalid label" );
 126
 127     if (!label) label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 128     if (string == label->label) return count;
 129     child = child->next;
 130     count++;
 131   }
 132
 133   wxFAIL_MSG( "wxChoice: string not found" );
 134
 135   return -1;
 136 }
 137
 138 int wxChoice::GetColumns(void) const
 139 {
 140   return 1;
 141 }
 142
 143 int wxChoice::GetSelection(void)
 144 {
 145   GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 146   int count = 0;
 147   GList *child = menu_shell->children;
 148   while (child)
 149   {
 150     GtkBin *bin = GTK_BIN( child->data );
 151     if (!bin->child) return count;
 152     child = child->next;
 153     count++;
 154   }
 155
 156   wxFAIL_MSG( "wxChoice: no selection" );
 157
 158   return -1;
 159 }
 160
 161 wxString wxChoice::GetString( int n ) const
 162 {
 163   GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 164   int count = 0;
 165   GList *child = menu_shell->children;
 166   while (child)
 167   {
 168     GtkBin *bin = GTK_BIN( child->data );
 169     if (count == n)
 170     {
 171       GtkLabel *label = (GtkLabel *) NULL;
 172       if (bin->child) label = GTK_LABEL(bin->child);
 173
 174       wxASSERT_MSG( label != NULL , "wxChoice: invalid label" );
 175
 176       if (!label) label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 177       return label->label;
 178     }
 179     child = child->next;
 180     count++;
 181   }
 182
 183   wxFAIL_MSG( "wxChoice: string not found" );
 184
 185   return "";
 186 }
 187
 188 wxString wxChoice::GetStringSelection(void) const
 189 {
 190   GtkLabel *label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 191
 192   wxASSERT_MSG( label != NULL , "wxChoice: invalid label" );
 193
 194   return label->label;
 195 }
 196
 197 int wxChoice::Number(void) const
 198 {
 199   GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 200   int count = 0;
 201   GList *child = menu_shell->children;
 202   while (child)
 203   {
 204     count++;
 205     child = child->next;
 206   }
 207   return count;
 208 }
 209
 210 void wxChoice::SetColumns( int WXUNUSED(n) )
 211 {
 212 }
 213
 214 void wxChoice::SetSelection( int n )
 215 {
 216   int tmp = n;
 217   gtk_option_menu_set_history( GTK_OPTION_MENU(m_widget), (gint)tmp );
 218
 219   gtk_choice_clicked_callback( (GtkWidget *) NULL, this );
 220 }
 221
 222 void wxChoice::SetStringSelection( const wxString &string )
 223 {
 224   int n = FindString( string );
 225   if (n != -1) SetSelection( n );
 226 }
 227