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 // 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 wxChoice::wxChoice( wxWindow *parent, wxWindowID id,
  50       const wxPoint &pos, const wxSize &size,
  51       int n, const wxString choices[],
  52       long style, const wxString &name )
  53 {
  54   Create( parent, id, pos, size, n, choices, style, name );
  55 };
  56
  57 bool wxChoice::Create( wxWindow *parent, wxWindowID id,
  58       const wxPoint &pos, const wxSize &size,
  59       int n, const wxString choices[],
  60       long style, const wxString &name )
  61 {
  62   m_needParent = TRUE;
  63
  64   PreCreation( parent, id, pos, size, style, name );
  65
  66   m_widget = gtk_option_menu_new();
  67
  68   wxSize newSize = size;
  69   if (newSize.x == -1) newSize.x = 80;
  70   if (newSize.y == -1) newSize.y = 26;
  71   SetSize( newSize.x, newSize.y );
  72
  73   GtkWidget *menu;
  74   menu = gtk_menu_new();
  75
  76   for (int i = 0; i < n; i++)
  77   {
  78     GtkWidget *item;
  79     item = gtk_menu_item_new_with_label( choices[i] );
  80     gtk_signal_connect( GTK_OBJECT( item ), "activate",
  81       GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );
  82     gtk_menu_append( GTK_MENU(menu), item );
  83     gtk_widget_show( item );
  84   };
  85   gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu );
  86
  87   PostCreation();
  88
  89   Show( TRUE );
  90
  91   return TRUE;
  92 };
  93
  94 void wxChoice::Append( const wxString &item )
  95 {
  96   GtkWidget *menu = gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) );
  97   GtkWidget *menu_item;
  98   menu_item = gtk_menu_item_new_with_label( item );
  99   gtk_signal_connect( GTK_OBJECT( menu_item ), "activate",
 100     GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );
 101   gtk_menu_append( GTK_MENU(menu), menu_item );
 102   gtk_widget_show( menu_item );
 103 };
 104
 105 void wxChoice::Clear(void)
 106 {
 107   gtk_option_menu_remove_menu( GTK_OPTION_MENU(m_widget) );
 108   GtkWidget *menu = gtk_menu_new();
 109   gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu );
 110 };
 111
 112 int wxChoice::FindString( const wxString &string ) const
 113 {
 114   // If you read this code once and you think you understand
 115   // it, then you are very wrong. Robert Roebling.
 116
 117   GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 118   int count = 0;
 119   GList *child = menu_shell->children;
 120   while (child)
 121   {
 122     GtkBin *bin = GTK_BIN( child->data );
 123     GtkLabel *label = NULL;
 124     if (bin->child) label = GTK_LABEL(bin->child);
 125     if (!label) label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 126     if (string == label->label) return count;
 127     child = child->next;
 128     count++;
 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   return -1;
 151 };
 152
 153 wxString wxChoice::GetString( int n ) const
 154 {
 155   GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 156   int count = 0;
 157   GList *child = menu_shell->children;
 158   while (child)
 159   {
 160     GtkBin *bin = GTK_BIN( child->data );
 161     if (count == n)
 162     {
 163       GtkLabel *label = NULL;
 164       if (bin->child) label = GTK_LABEL(bin->child);
 165       if (!label) label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 166       return label->label;
 167     };
 168     child = child->next;
 169     count++;
 170   };
 171   return "";
 172 };
 173
 174 wxString wxChoice::GetStringSelection(void) const
 175 {
 176   GtkLabel *label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 177   return label->label;
 178 };
 179
 180 int wxChoice::Number(void) const
 181 {
 182   GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 183   int count = 0;
 184   GList *child = menu_shell->children;
 185   while (child)
 186   {
 187     count++;
 188     child = child->next;
 189   };
 190   return count;
 191 };
 192
 193 void wxChoice::SetColumns( int WXUNUSED(n) )
 194 {
 195 };
 196
 197 void wxChoice::SetSelection( int n )
 198 {
 199   int tmp = n;
 200   gtk_option_menu_set_history( GTK_OPTION_MENU(m_widget), (gint)tmp );
 201
 202   gtk_choice_clicked_callback( NULL, this );
 203 };
 204
 205 void wxChoice::SetStringSelection( const wxString &string )
 206 {
 207   int n = FindString( string );
 208   if (n != -1) SetSelection( n );
 209 };
 210