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 // "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
  96   if (m_hasOwnStyle)
  97   {
  98     GtkBin *bin = GTK_BIN( menu_item );
  99     gtk_widget_set_style( bin->child,
 100       gtk_style_ref(
 101         gtk_widget_get_style( m_widget ) ) );
 102   }
 103
 104   gtk_signal_connect( GTK_OBJECT( menu_item ), "activate",
 105     GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );
 106
 107   gtk_menu_append( GTK_MENU(menu), menu_item );
 108   gtk_widget_show( menu_item );
 109 }
 110
 111 void wxChoice::Clear(void)
 112 {
 113   gtk_option_menu_remove_menu( GTK_OPTION_MENU(m_widget) );
 114   GtkWidget *menu = gtk_menu_new();
 115   gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu );
 116 }
 117
 118 void wxChoice::Delete( int WXUNUSED(n) )
 119 {
 120   wxFAIL_MSG( "wxChoice:Delete not implemented" );
 121 }
 122
 123 int wxChoice::FindString( const wxString &string ) const
 124 {
 125   // If you read this code once and you think you understand
 126   // it, then you are very wrong. Robert Roebling.
 127
 128   GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 129   int count = 0;
 130   GList *child = menu_shell->children;
 131   while (child)
 132   {
 133     GtkBin *bin = GTK_BIN( child->data );
 134     GtkLabel *label = (GtkLabel *) NULL;
 135     if (bin->child) label = GTK_LABEL(bin->child);
 136     if (!label) label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 137
 138     wxASSERT_MSG( label != NULL , "wxChoice: invalid label" );
 139
 140     if (string == label->label) return count;
 141     child = child->next;
 142     count++;
 143   }
 144
 145   wxFAIL_MSG( "wxChoice: string not found" );
 146
 147   return -1;
 148 }
 149
 150 int wxChoice::GetColumns(void) const
 151 {
 152   return 1;
 153 }
 154
 155 int wxChoice::GetSelection(void)
 156 {
 157   GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 158   int count = 0;
 159   GList *child = menu_shell->children;
 160   while (child)
 161   {
 162     GtkBin *bin = GTK_BIN( child->data );
 163     if (!bin->child) return count;
 164     child = child->next;
 165     count++;
 166   }
 167
 168   wxFAIL_MSG( "wxChoice: no selection" );
 169
 170   return -1;
 171 }
 172
 173 wxString wxChoice::GetString( int n ) const
 174 {
 175   GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 176   int count = 0;
 177   GList *child = menu_shell->children;
 178   while (child)
 179   {
 180     GtkBin *bin = GTK_BIN( child->data );
 181     if (count == n)
 182     {
 183       GtkLabel *label = (GtkLabel *) NULL;
 184       if (bin->child) label = GTK_LABEL(bin->child);
 185       if (!label) label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 186
 187       wxASSERT_MSG( label != NULL , "wxChoice: invalid label" );
 188
 189       return label->label;
 190     }
 191     child = child->next;
 192     count++;
 193   }
 194
 195   wxFAIL_MSG( "wxChoice: string not found" );
 196
 197   return "";
 198 }
 199
 200 wxString wxChoice::GetStringSelection(void) const
 201 {
 202   GtkLabel *label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 203
 204   wxASSERT_MSG( label != NULL , "wxChoice: invalid label" );
 205
 206   return label->label;
 207 }
 208
 209 int wxChoice::Number(void) const
 210 {
 211   GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 212   int count = 0;
 213   GList *child = menu_shell->children;
 214   while (child)
 215   {
 216     count++;
 217     child = child->next;
 218   }
 219   return count;
 220 }
 221
 222 void wxChoice::SetColumns( int WXUNUSED(n) )
 223 {
 224 }
 225
 226 void wxChoice::SetSelection( int n )
 227 {
 228   int tmp = n;
 229   gtk_option_menu_set_history( GTK_OPTION_MENU(m_widget), (gint)tmp );
 230
 231   gtk_choice_clicked_callback( (GtkWidget *) NULL, this );
 232 }
 233
 234 void wxChoice::SetStringSelection( const wxString &string )
 235 {
 236   int n = FindString( string );
 237   if (n != -1) SetSelection( n );
 238 }
 239
 240 void wxChoice::SetFont( const wxFont &font )
 241 {
 242   wxWindow::SetFont( font );
 243
 244   GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 245   GList *child = menu_shell->children;
 246   while (child)
 247   {
 248     GtkBin *bin = GTK_BIN( child->data );
 249     GtkWidget *label = (GtkWidget *) NULL;
 250     if (bin->child) label = bin->child;
 251     if (!label) label = GTK_BUTTON(m_widget)->child;
 252
 253     gtk_widget_set_style( label,
 254       gtk_style_ref(
 255         gtk_widget_get_style( m_widget ) ) );
 256
 257     child = child->next;
 258   }
 259 }