src/gtk/choice.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        choice.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $id$
   6 // Copyright:   (c) 1998 Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10
  11 #ifdef __GNUG__
  12 #pragma implementation "choice.h"
  13 #endif
  14
  15 #include "wx/choice.h"
  16
  17 //-----------------------------------------------------------------------------
  18 // data
  19 //-----------------------------------------------------------------------------
  20
  21 extern bool   g_blockEventsOnDrag;
  22
  23 //-----------------------------------------------------------------------------
  24 // "activate"
  25 //-----------------------------------------------------------------------------
  26
  27 static void gtk_choice_clicked_callback( GtkWidget *WXUNUSED(widget), wxChoice *choice )
  28 {
  29   if (!choice->HasVMT()) return;
  30   if (g_blockEventsOnDrag) return;
  31
  32   wxCommandEvent event(wxEVT_COMMAND_CHOICE_SELECTED, choice->GetId() );
  33   event.SetInt( choice->GetSelection() );
  34   wxString tmp( choice->GetStringSelection() );
  35   event.SetString( WXSTRINGCAST(tmp) );
  36   event.SetEventObject(choice);
  37   choice->GetEventHandler()->ProcessEvent(event);
  38 }
  39
  40 //-----------------------------------------------------------------------------
  41 // wxChoice
  42 //-----------------------------------------------------------------------------
  43
  44 IMPLEMENT_DYNAMIC_CLASS(wxChoice,wxControl)
  45
  46 wxChoice::wxChoice(void)
  47 {
  48 }
  49
  50 bool wxChoice::Create( wxWindow *parent, wxWindowID id,
  51       const wxPoint &pos, const wxSize &size,
  52       int n, const wxString choices[],
  53       long style, const wxValidator& validator, const wxString &name )
  54 {
  55   m_needParent = TRUE;
  56
  57   PreCreation( parent, id, pos, size, style, name );
  58
  59   SetValidator( validator );
  60
  61   m_widget = gtk_option_menu_new();
  62
  63   wxSize newSize = size;
  64   if (newSize.x == -1) newSize.x = 80;
  65   if (newSize.y == -1) newSize.y = 26;
  66   SetSize( newSize.x, newSize.y );
  67
  68   GtkWidget *menu;
  69   menu = gtk_menu_new();
  70
  71   for (int i = 0; i < n; i++)
  72   {
  73     GtkWidget *item;
  74     item = gtk_menu_item_new_with_label( choices[i] );
  75     gtk_signal_connect( GTK_OBJECT( item ), "activate",
  76       GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );
  77     gtk_menu_append( GTK_MENU(menu), item );
  78     gtk_widget_show( item );
  79   }
  80   gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu );
  81
  82   PostCreation();
  83
  84   Show( TRUE );
  85
  86   return TRUE;
  87 }
  88
  89 void wxChoice::Append( const wxString &item )
  90 {
  91   GtkWidget *menu = gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) );
  92   GtkWidget *menu_item;
  93   menu_item = gtk_menu_item_new_with_label( item );
  94
  95   if (m_hasOwnStyle)
  96   {
  97     GtkBin *bin = GTK_BIN( menu_item );
  98     gtk_widget_set_style( bin->child,
  99       gtk_style_ref(
 100         gtk_widget_get_style( m_widget ) ) );
 101   }
 102
 103   gtk_signal_connect( GTK_OBJECT( menu_item ), "activate",
 104     GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );
 105
 106   gtk_menu_append( GTK_MENU(menu), menu_item );
 107   gtk_widget_show( menu_item );
 108 }
 109
 110 void wxChoice::Clear(void)
 111 {
 112   gtk_option_menu_remove_menu( GTK_OPTION_MENU(m_widget) );
 113   GtkWidget *menu = gtk_menu_new();
 114   gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu );
 115 }
 116
 117 void wxChoice::Delete( int WXUNUSED(n) )
 118 {
 119   wxFAIL_MSG( "wxChoice:Delete not implemented" );
 120 }
 121
 122 int wxChoice::FindString( const wxString &string ) const
 123 {
 124   // If you read this code once and you think you understand
 125   // it, then you are very wrong. Robert Roebling.
 126
 127   GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 128   int count = 0;
 129   GList *child = menu_shell->children;
 130   while (child)
 131   {
 132     GtkBin *bin = GTK_BIN( child->data );
 133     GtkLabel *label = (GtkLabel *) NULL;
 134     if (bin->child) label = GTK_LABEL(bin->child);
 135     if (!label) label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 136
 137     wxASSERT_MSG( label != NULL , "wxChoice: invalid label" );
 138
 139     if (string == label->label) return count;
 140     child = child->next;
 141     count++;
 142   }
 143
 144   wxFAIL_MSG( "wxChoice: string not found" );
 145
 146   return -1;
 147 }
 148
 149 int wxChoice::GetColumns(void) const
 150 {
 151   return 1;
 152 }
 153
 154 int wxChoice::GetSelection(void)
 155 {
 156   GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 157   int count = 0;
 158   GList *child = menu_shell->children;
 159   while (child)
 160   {
 161     GtkBin *bin = GTK_BIN( child->data );
 162     if (!bin->child) return count;
 163     child = child->next;
 164     count++;
 165   }
 166
 167   wxFAIL_MSG( "wxChoice: no selection" );
 168
 169   return -1;
 170 }
 171
 172 wxString wxChoice::GetString( int n ) const
 173 {
 174   GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 175   int count = 0;
 176   GList *child = menu_shell->children;
 177   while (child)
 178   {
 179     GtkBin *bin = GTK_BIN( child->data );
 180     if (count == n)
 181     {
 182       GtkLabel *label = (GtkLabel *) NULL;
 183       if (bin->child) label = GTK_LABEL(bin->child);
 184       if (!label) label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 185
 186       wxASSERT_MSG( label != NULL , "wxChoice: invalid label" );
 187
 188       return label->label;
 189     }
 190     child = child->next;
 191     count++;
 192   }
 193
 194   wxFAIL_MSG( "wxChoice: string not found" );
 195
 196   return "";
 197 }
 198
 199 wxString wxChoice::GetStringSelection(void) const
 200 {
 201   GtkLabel *label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 202
 203   wxASSERT_MSG( label != NULL , "wxChoice: invalid label" );
 204
 205   return label->label;
 206 }
 207
 208 int wxChoice::Number(void) const
 209 {
 210   GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 211   int count = 0;
 212   GList *child = menu_shell->children;
 213   while (child)
 214   {
 215     count++;
 216     child = child->next;
 217   }
 218   return count;
 219 }
 220
 221 void wxChoice::SetColumns( int WXUNUSED(n) )
 222 {
 223 }
 224
 225 void wxChoice::SetSelection( int n )
 226 {
 227   int tmp = n;
 228   gtk_option_menu_set_history( GTK_OPTION_MENU(m_widget), (gint)tmp );
 229
 230   gtk_choice_clicked_callback( (GtkWidget *) NULL, this );
 231 }
 232
 233 void wxChoice::SetStringSelection( const wxString &string )
 234 {
 235   int n = FindString( string );
 236   if (n != -1) SetSelection( n );
 237 }
 238
 239 void wxChoice::SetFont( const wxFont &font )
 240 {
 241   wxWindow::SetFont( font );
 242
 243   GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 244   GList *child = menu_shell->children;
 245   while (child)
 246   {
 247     GtkBin *bin = GTK_BIN( child->data );
 248     GtkWidget *label = (GtkWidget *) NULL;
 249     if (bin->child) label = bin->child;
 250     if (!label) label = GTK_BUTTON(m_widget)->child;
 251
 252     gtk_widget_set_style( label,
 253       gtk_style_ref(
 254         gtk_widget_get_style( m_widget ) ) );
 255
 256     child = child->next;
 257   }
 258 }