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 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
 126     wxASSERT_MSG( label != NULL , "wxChoice: invalid label" );
 127
 128     if (!label) label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 129     if (string == label->label) return count;
 130     child = child->next;
 131     count++;
 132   };
 133
 134   wxFAIL_MSG( "wxChoice: string not found" );
 135
 136   return -1;
 137 };
 138
 139 int wxChoice::GetColumns(void) const
 140 {
 141   return 1;
 142 };
 143
 144 int wxChoice::GetSelection(void)
 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 (!bin->child) return count;
 153     child = child->next;
 154     count++;
 155   };
 156
 157   wxFAIL_MSG( "wxChoice: no selection" );
 158
 159   return -1;
 160 };
 161
 162 wxString wxChoice::GetString( int n ) const
 163 {
 164   GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 165   int count = 0;
 166   GList *child = menu_shell->children;
 167   while (child)
 168   {
 169     GtkBin *bin = GTK_BIN( child->data );
 170     if (count == n)
 171     {
 172       GtkLabel *label = NULL;
 173       if (bin->child) label = GTK_LABEL(bin->child);
 174
 175       wxASSERT_MSG( label != NULL , "wxChoice: invalid label" );
 176
 177       if (!label) label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 178       return label->label;
 179     };
 180     child = child->next;
 181     count++;
 182   };
 183
 184   wxFAIL_MSG( "wxChoice: string not found" );
 185
 186   return "";
 187 };
 188
 189 wxString wxChoice::GetStringSelection(void) const
 190 {
 191   GtkLabel *label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 192
 193   wxASSERT_MSG( label != NULL , "wxChoice: invalid label" );
 194
 195   return label->label;
 196 };
 197
 198 int wxChoice::Number(void) const
 199 {
 200   GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 201   int count = 0;
 202   GList *child = menu_shell->children;
 203   while (child)
 204   {
 205     count++;
 206     child = child->next;
 207   };
 208   return count;
 209 };
 210
 211 void wxChoice::SetColumns( int WXUNUSED(n) )
 212 {
 213 };
 214
 215 void wxChoice::SetSelection( int n )
 216 {
 217   int tmp = n;
 218   gtk_option_menu_set_history( GTK_OPTION_MENU(m_widget), (gint)tmp );
 219
 220   gtk_choice_clicked_callback( NULL, this );
 221 };
 222
 223 void wxChoice::SetStringSelection( const wxString &string )
 224 {
 225   int n = FindString( string );
 226   if (n != -1) SetSelection( n );
 227 };
 228