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 // "activate"
  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 // wxChoice
  43 //-----------------------------------------------------------------------------
  44
  45 IMPLEMENT_DYNAMIC_CLASS(wxChoice,wxControl)
  46
  47 wxChoice::wxChoice(void)
  48 {
  49 }
  50
  51 bool wxChoice::Create( wxWindow *parent, wxWindowID id,
  52       const wxPoint &pos, const wxSize &size,
  53       int n, const wxString choices[],
  54       long style, const wxValidator& validator, const wxString &name )
  55 {
  56   m_needParent = TRUE;
  57
  58   PreCreation( parent, id, pos, size, style, name );
  59
  60   SetValidator( validator );
  61
  62   m_widget = gtk_option_menu_new();
  63
  64   wxSize newSize = size;
  65   if (newSize.x == -1) newSize.x = 80;
  66   if (newSize.y == -1) newSize.y = 26;
  67   SetSize( newSize.x, newSize.y );
  68
  69   GtkWidget *menu;
  70   menu = gtk_menu_new();
  71
  72   for (int i = 0; i < n; i++)
  73   {
  74     GtkWidget *item;
  75     item = gtk_menu_item_new_with_label( choices[i] );
  76     gtk_signal_connect( GTK_OBJECT( item ), "activate",
  77       GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );
  78     gtk_menu_append( GTK_MENU(menu), item );
  79     gtk_widget_show( item );
  80   }
  81   gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu );
  82
  83   PostCreation();
  84
  85   Show( TRUE );
  86
  87   return TRUE;
  88 }
  89
  90 void wxChoice::Append( const wxString &item )
  91 {
  92   GtkWidget *menu = gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) );
  93   GtkWidget *menu_item;
  94   menu_item = gtk_menu_item_new_with_label( item );
  95   gtk_signal_connect( GTK_OBJECT( menu_item ), "activate",
  96     GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );
  97   gtk_menu_append( GTK_MENU(menu), menu_item );
  98   gtk_widget_show( menu_item );
  99 }
 100
 101 void wxChoice::Clear(void)
 102 {
 103   gtk_option_menu_remove_menu( GTK_OPTION_MENU(m_widget) );
 104   GtkWidget *menu = gtk_menu_new();
 105   gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu );
 106 }
 107
 108 void wxChoice::Delete( int WXUNUSED(n) )
 109 {
 110   wxFAIL_MSG( "wxChoice:Delete not implemented" );
 111 }
 112
 113 int wxChoice::FindString( const wxString &string ) const
 114 {
 115   // If you read this code once and you think you understand
 116   // it, then you are very wrong. Robert Roebling.
 117
 118   GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 119   int count = 0;
 120   GList *child = menu_shell->children;
 121   while (child)
 122   {
 123     GtkBin *bin = GTK_BIN( child->data );
 124     GtkLabel *label = (GtkLabel *) NULL;
 125     if (bin->child) label = GTK_LABEL(bin->child);
 126
 127     wxASSERT_MSG( label != NULL , "wxChoice: invalid label" );
 128
 129     if (!label) label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 130     if (string == label->label) return count;
 131     child = child->next;
 132     count++;
 133   }
 134
 135   wxFAIL_MSG( "wxChoice: string not found" );
 136
 137   return -1;
 138 }
 139
 140 int wxChoice::GetColumns(void) const
 141 {
 142   return 1;
 143 }
 144
 145 int wxChoice::GetSelection(void)
 146 {
 147   GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 148   int count = 0;
 149   GList *child = menu_shell->children;
 150   while (child)
 151   {
 152     GtkBin *bin = GTK_BIN( child->data );
 153     if (!bin->child) return count;
 154     child = child->next;
 155     count++;
 156   }
 157
 158   wxFAIL_MSG( "wxChoice: no selection" );
 159
 160   return -1;
 161 }
 162
 163 wxString wxChoice::GetString( int n ) const
 164 {
 165   GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 166   int count = 0;
 167   GList *child = menu_shell->children;
 168   while (child)
 169   {
 170     GtkBin *bin = GTK_BIN( child->data );
 171     if (count == n)
 172     {
 173       GtkLabel *label = (GtkLabel *) NULL;
 174       if (bin->child) label = GTK_LABEL(bin->child);
 175
 176       wxASSERT_MSG( label != NULL , "wxChoice: invalid label" );
 177
 178       if (!label) label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 179       return label->label;
 180     }
 181     child = child->next;
 182     count++;
 183   }
 184
 185   wxFAIL_MSG( "wxChoice: string not found" );
 186
 187   return "";
 188 }
 189
 190 wxString wxChoice::GetStringSelection(void) const
 191 {
 192   GtkLabel *label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 193
 194   wxASSERT_MSG( label != NULL , "wxChoice: invalid label" );
 195
 196   return label->label;
 197 }
 198
 199 int wxChoice::Number(void) const
 200 {
 201   GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 202   int count = 0;
 203   GList *child = menu_shell->children;
 204   while (child)
 205   {
 206     count++;
 207     child = child->next;
 208   }
 209   return count;
 210 }
 211
 212 void wxChoice::SetColumns( int WXUNUSED(n) )
 213 {
 214 }
 215
 216 void wxChoice::SetSelection( int n )
 217 {
 218   int tmp = n;
 219   gtk_option_menu_set_history( GTK_OPTION_MENU(m_widget), (gint)tmp );
 220
 221   gtk_choice_clicked_callback( (GtkWidget *) NULL, this );
 222 }
 223
 224 void wxChoice::SetStringSelection( const wxString &string )
 225 {
 226   int n = FindString( string );
 227   if (n != -1) SetSelection( n );
 228 }
 229