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), wxChoice *choice )
  23 {
  24   wxCommandEvent event(wxEVT_COMMAND_CHOICE_SELECTED, choice->GetId() );
  25   event.SetInt( choice->GetSelection() );
  26   wxString tmp( choice->GetStringSelection() );
  27   event.SetString( WXSTRINGCAST(tmp) );
  28   event.SetEventObject(choice);
  29   choice->GetEventHandler()->ProcessEvent(event);
  30 };
  31
  32 //-----------------------------------------------------------------------------
  33
  34 IMPLEMENT_DYNAMIC_CLASS(wxChoice,wxControl)
  35
  36 wxChoice::wxChoice(void)
  37 {
  38 };
  39
  40 wxChoice::wxChoice( wxWindow *parent, wxWindowID id,
  41       const wxPoint &pos, const wxSize &size,
  42       int n, const wxString choices[],
  43       long style, const wxString &name )
  44 {
  45   Create( parent, id, pos, size, n, choices, style, name );
  46 };
  47
  48 bool wxChoice::Create( wxWindow *parent, wxWindowID id,
  49       const wxPoint &pos, const wxSize &size,
  50       int n, const wxString choices[],
  51       long style, const wxString &name )
  52 {
  53   m_needParent = TRUE;
  54
  55   PreCreation( parent, id, pos, size, style, name );
  56
  57   m_widget = gtk_option_menu_new();
  58
  59   wxSize newSize = size;
  60   if (newSize.x == -1) newSize.x = 80;
  61   if (newSize.y == -1) newSize.y = 26;
  62   SetSize( newSize.x, newSize.y );
  63
  64   GtkWidget *menu;
  65   menu = gtk_menu_new();
  66
  67   for (int i = 0; i < n; i++)
  68   {
  69     GtkWidget *item;
  70     item = gtk_menu_item_new_with_label( choices[i] );
  71     gtk_signal_connect( GTK_OBJECT( item ), "activate",
  72       GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );
  73     gtk_menu_append( GTK_MENU(menu), item );
  74     gtk_widget_show( item );
  75   };
  76   gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu );
  77
  78   PostCreation();
  79
  80   Show( TRUE );
  81
  82   return TRUE;
  83 };
  84
  85 void wxChoice::Append( const wxString &item )
  86 {
  87   GtkWidget *menu = gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) );
  88   GtkWidget *menu_item;
  89   menu_item = gtk_menu_item_new_with_label( item );
  90   gtk_signal_connect( GTK_OBJECT( menu_item ), "activate",
  91     GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );
  92   gtk_menu_append( GTK_MENU(menu), menu_item );
  93   gtk_widget_show( menu_item );
  94 };
  95
  96 void wxChoice::Clear(void)
  97 {
  98   gtk_option_menu_remove_menu( GTK_OPTION_MENU(m_widget) );
  99   GtkWidget *menu = gtk_menu_new();
 100   gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu );
 101 };
 102
 103 int wxChoice::FindString( const wxString &string ) const
 104 {
 105   // If you read this code once and you think you understand
 106   // it, then you are very wrong. Robert Roebling.
 107
 108   GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 109   int count = 0;
 110   GList *child = menu_shell->children;
 111   while (child)
 112   {
 113     GtkBin *bin = GTK_BIN( child->data );
 114     GtkLabel *label = NULL;
 115     if (bin->child) 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( 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 = NULL;
 155       if (bin->child) label = GTK_LABEL(bin->child);
 156       if (!label) label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 157       return label->label;
 158     };
 159     child = child->next;
 160     count++;
 161   };
 162   return "";
 163 };
 164
 165 wxString wxChoice::GetStringSelection(void) const
 166 {
 167   GtkLabel *label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 168   return label->label;
 169 };
 170
 171 int wxChoice::Number(void) const
 172 {
 173   GtkMenu *menu = GTK_MENU( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 174   int count = 0;
 175   GList *child = menu->children;
 176   while (child)
 177   {
 178     count++;
 179     child = child->next;
 180   };
 181   return count;
 182 };
 183
 184 void wxChoice::SetColumns( int WXUNUSED(n) )
 185 {
 186 };
 187
 188 void wxChoice::SetSelection( int n )
 189 {
 190   int tmp = n;
 191   gtk_option_menu_set_history( GTK_OPTION_MENU(m_widget), (gint)tmp );
 192
 193   gtk_choice_clicked_callback( NULL, this );
 194 };
 195
 196 void wxChoice::SetStringSelection( const wxString &string )
 197 {
 198   int n = FindString( string );
 199   if (n != -1) SetSelection( n );
 200 };
 201