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 int wxChoice::FindString( const wxString &string ) const
 107 {
 108   // If you read this code once and you think you understand
 109   // it, then you are very wrong. Robert Roebling.
 110
 111   GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 112   int count = 0;
 113   GList *child = menu_shell->children;
 114   while (child)
 115   {
 116     GtkBin *bin = GTK_BIN( child->data );
 117     GtkLabel *label = (GtkLabel *) NULL;
 118     if (bin->child) label = GTK_LABEL(bin->child);
 119
 120     wxASSERT_MSG( label != NULL , "wxChoice: invalid label" );
 121
 122     if (!label) label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 123     if (string == label->label) return count;
 124     child = child->next;
 125     count++;
 126   }
 127
 128   wxFAIL_MSG( "wxChoice: string not found" );
 129
 130   return -1;
 131 }
 132
 133 int wxChoice::GetColumns(void) const
 134 {
 135   return 1;
 136 }
 137
 138 int wxChoice::GetSelection(void)
 139 {
 140   GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 141   int count = 0;
 142   GList *child = menu_shell->children;
 143   while (child)
 144   {
 145     GtkBin *bin = GTK_BIN( child->data );
 146     if (!bin->child) return count;
 147     child = child->next;
 148     count++;
 149   }
 150
 151   wxFAIL_MSG( "wxChoice: no selection" );
 152
 153   return -1;
 154 }
 155
 156 wxString wxChoice::GetString( int n ) const
 157 {
 158   GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 159   int count = 0;
 160   GList *child = menu_shell->children;
 161   while (child)
 162   {
 163     GtkBin *bin = GTK_BIN( child->data );
 164     if (count == n)
 165     {
 166       GtkLabel *label = (GtkLabel *) NULL;
 167       if (bin->child) label = GTK_LABEL(bin->child);
 168
 169       wxASSERT_MSG( label != NULL , "wxChoice: invalid label" );
 170
 171       if (!label) label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 172       return label->label;
 173     }
 174     child = child->next;
 175     count++;
 176   }
 177
 178   wxFAIL_MSG( "wxChoice: string not found" );
 179
 180   return "";
 181 }
 182
 183 wxString wxChoice::GetStringSelection(void) const
 184 {
 185   GtkLabel *label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 186
 187   wxASSERT_MSG( label != NULL , "wxChoice: invalid label" );
 188
 189   return label->label;
 190 }
 191
 192 int wxChoice::Number(void) const
 193 {
 194   GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 195   int count = 0;
 196   GList *child = menu_shell->children;
 197   while (child)
 198   {
 199     count++;
 200     child = child->next;
 201   }
 202   return count;
 203 }
 204
 205 void wxChoice::SetColumns( int WXUNUSED(n) )
 206 {
 207 }
 208
 209 void wxChoice::SetSelection( int n )
 210 {
 211   int tmp = n;
 212   gtk_option_menu_set_history( GTK_OPTION_MENU(m_widget), (gint)tmp );
 213
 214   gtk_choice_clicked_callback( (GtkWidget *) NULL, this );
 215 }
 216
 217 void wxChoice::SetStringSelection( const wxString &string )
 218 {
 219   int n = FindString( string );
 220   if (n != -1) SetSelection( n );
 221 }
 222