src/gtk/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 // wxChoice
  20 //-----------------------------------------------------------------------------
  21
  22 void gtk_choice_clicked_callback( GtkWidget *WXUNUSED(widget), gpointer data )
  23 {
  24   wxChoice *choice = (wxChoice*)data;
  25   wxCommandEvent event(wxEVT_COMMAND_CHOICE_SELECTED, choice->GetId());
  26   event.SetInt( choice->GetSelection() );
  27   wxString tmp( choice->GetStringSelection() );
  28   event.SetString( WXSTRINGCAST(tmp) );
  29   event.SetEventObject(choice);
  30   choice->ProcessEvent(event);
  31 };
  32
  33 //-----------------------------------------------------------------------------
  34
  35 IMPLEMENT_DYNAMIC_CLASS(wxChoice,wxControl)
  36
  37 wxChoice::wxChoice(void)
  38 {
  39 };
  40
  41 wxChoice::wxChoice( wxWindow *parent, const wxWindowID id,
  42       const wxPoint &pos, const wxSize &size,
  43       const int n, const wxString choices[],
  44       const long style, const wxString &name )
  45 {
  46   Create( parent, id, pos, size, n, choices, style, name );
  47 };
  48
  49 bool wxChoice::Create( wxWindow *parent, const wxWindowID id,
  50       const wxPoint &pos, const wxSize &size,
  51       const int n, const wxString choices[],
  52       const long style, const wxString &name )
  53 {
  54   m_needParent = TRUE;
  55
  56   PreCreation( parent, id, pos, size, style, name );
  57
  58   m_widget = gtk_option_menu_new();
  59
  60   wxSize newSize = size;
  61   if (newSize.x == -1) newSize.x = 80;
  62   if (newSize.y == -1) newSize.y = 26;
  63   SetSize( newSize.x, newSize.y );
  64
  65   GtkWidget *menu;
  66   menu = gtk_menu_new();
  67
  68   for (int i = 0; i < n; i++)
  69   {
  70     GtkWidget *item;
  71     item = gtk_menu_item_new_with_label( choices[i] );
  72     gtk_signal_connect( GTK_OBJECT( item ), "activate",
  73       GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );
  74     gtk_menu_append( GTK_MENU(menu), item );
  75     gtk_widget_show( item );
  76   };
  77   gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu );
  78
  79   PostCreation();
  80
  81   Show( TRUE );
  82
  83   return TRUE;
  84 };
  85
  86 void wxChoice::Append( const wxString &item )
  87 {
  88   GtkWidget *menu = gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) );
  89   GtkWidget *menu_item;
  90   menu_item = gtk_menu_item_new_with_label( item );
  91   gtk_signal_connect( GTK_OBJECT( menu_item ), "activate",
  92     GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );
  93   gtk_menu_append( GTK_MENU(menu), menu_item );
  94   gtk_widget_show( menu_item );
  95 };
  96
  97 void wxChoice::Clear(void)
  98 {
  99   gtk_option_menu_remove_menu( GTK_OPTION_MENU(m_widget) );
 100   GtkWidget *menu = gtk_menu_new();
 101   gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu );
 102 };
 103
 104 int wxChoice::FindString( const wxString &string ) const
 105 {
 106   // If you read this code once and you think you undestand
 107   // it, then you are very wrong. RR
 108
 109   GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 110   int count = 0;
 111   GList *child = menu_shell->children;
 112   while (child)
 113   {
 114     GtkBin *bin = GTK_BIN( child->data );
 115     GtkLabel *label = GTK_LABEL(bin->child);
 116     if (!label) label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 117     if (string == label->label) return count;
 118     child = child->next;
 119     count++;
 120   };
 121   return -1;
 122 };
 123
 124 int wxChoice::GetColumns(void) const
 125 {
 126   return 1;
 127 };
 128
 129 int wxChoice::GetSelection(void)
 130 {
 131   GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 132   int count = 0;
 133   GList *child = menu_shell->children;
 134   while (child)
 135   {
 136     GtkBin *bin = GTK_BIN( child->data );
 137     if (!bin->child) return count;
 138     child = child->next;
 139     count++;
 140   };
 141   return -1;
 142 };
 143
 144 wxString wxChoice::GetString( const int n ) const
 145 {
 146   GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 147   int count = 0;
 148   GList *child = menu_shell->children;
 149   while (child)
 150   {
 151     GtkBin *bin = GTK_BIN( child->data );
 152     if (count == n)
 153     {
 154       GtkLabel *label = GTK_LABEL(bin->child);
 155       if (!label) label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 156       return label->label;
 157     };
 158     child = child->next;
 159     count++;
 160   };
 161   return "";
 162 };
 163
 164 wxString wxChoice::GetStringSelection(void) const
 165 {
 166   GtkLabel *label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 167   return label->label;
 168 };
 169
 170 int wxChoice::Number(void) const
 171 {
 172   GtkMenu *menu = GTK_MENU( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 173   int count = 0;
 174   GList *child = menu->children;
 175   while (child)
 176   {
 177     count++;
 178     child = child->next;
 179   };
 180   return count;
 181 };
 182
 183 void wxChoice::SetColumns( const int WXUNUSED(n) )
 184 {
 185 };
 186
 187 void wxChoice::SetSelection( const int n )
 188 {
 189   int tmp = n;
 190   gtk_option_menu_set_history( GTK_OPTION_MENU(m_widget), (gint)tmp );
 191 };
 192
 193 void wxChoice::SetStringSelection( const wxString &string )
 194 {
 195   int n = FindString( string );
 196   if (n != -1) SetSelection( n );
 197 };
 198