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 = gtk_menu_new();
  69
  70   for (int i = 0; i < n; i++)
  71   {
  72     GtkWidget *item = gtk_menu_item_new_with_label( choices[i] );
  73     gtk_menu_append( GTK_MENU(menu), item );
  74
  75     gtk_widget_realize( item );
  76     gtk_widget_realize( GTK_BIN(item)->child );
  77
  78     gtk_widget_show( item );
  79
  80     gtk_signal_connect( GTK_OBJECT( item ), "activate",
  81       GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );
  82   }
  83   gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu );
  84
  85   PostCreation();
  86
  87   SetBackgroundColour( parent->GetBackgroundColour() );
  88   SetForegroundColour( parent->GetForegroundColour() );
  89
  90   Show( TRUE );
  91
  92   return TRUE;
  93 }
  94
  95 void wxChoice::Append( const wxString &item )
  96 {
  97   wxCHECK_RET( m_widget != NULL, "invalid choice" );
  98
  99   GtkWidget *menu = gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) );
 100   GtkWidget *menu_item = gtk_menu_item_new_with_label( item );
 101
 102   gtk_menu_append( GTK_MENU(menu), menu_item );
 103
 104   gtk_widget_realize( menu_item );
 105   gtk_widget_realize( GTK_BIN(menu_item)->child );
 106
 107   if (m_widgetStyle) ApplyWidgetStyle();
 108
 109   gtk_signal_connect( GTK_OBJECT( menu_item ), "activate",
 110     GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );
 111
 112   gtk_widget_show( menu_item );
 113 }
 114
 115 void wxChoice::Clear(void)
 116 {
 117   wxCHECK_RET( m_widget != NULL, "invalid choice" );
 118
 119   gtk_option_menu_remove_menu( GTK_OPTION_MENU(m_widget) );
 120   GtkWidget *menu = gtk_menu_new();
 121   gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu );
 122 }
 123
 124 void wxChoice::Delete( int WXUNUSED(n) )
 125 {
 126   wxFAIL_MSG( "wxChoice:Delete not implemented" );
 127 }
 128
 129 int wxChoice::FindString( const wxString &string ) const
 130 {
 131   wxCHECK_MSG( m_widget != NULL, -1, "invalid choice" );
 132
 133   // If you read this code once and you think you understand
 134   // it, then you are very wrong. Robert Roebling.
 135
 136   GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 137   int count = 0;
 138   GList *child = menu_shell->children;
 139   while (child)
 140   {
 141     GtkBin *bin = GTK_BIN( child->data );
 142     GtkLabel *label = (GtkLabel *) NULL;
 143     if (bin->child) label = GTK_LABEL(bin->child);
 144     if (!label) label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 145
 146     wxASSERT_MSG( label != NULL , "wxChoice: invalid label" );
 147
 148     if (string == label->label) return count;
 149     child = child->next;
 150     count++;
 151   }
 152
 153   wxFAIL_MSG( "wxChoice: string not found" );
 154
 155   return -1;
 156 }
 157
 158 int wxChoice::GetColumns(void) const
 159 {
 160   return 1;
 161 }
 162
 163 int wxChoice::GetSelection(void)
 164 {
 165   wxCHECK_MSG( m_widget != NULL, -1, "invalid choice" );
 166
 167   GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 168   int count = 0;
 169   GList *child = menu_shell->children;
 170   while (child)
 171   {
 172     GtkBin *bin = GTK_BIN( child->data );
 173     if (!bin->child) return count;
 174     child = child->next;
 175     count++;
 176   }
 177
 178   wxFAIL_MSG( "wxChoice: no selection" );
 179
 180   return -1;
 181 }
 182
 183 wxString wxChoice::GetString( int n ) const
 184 {
 185   wxCHECK_MSG( m_widget != NULL, "", "invalid choice" );
 186
 187   GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 188   int count = 0;
 189   GList *child = menu_shell->children;
 190   while (child)
 191   {
 192     GtkBin *bin = GTK_BIN( child->data );
 193     if (count == n)
 194     {
 195       GtkLabel *label = (GtkLabel *) NULL;
 196       if (bin->child) label = GTK_LABEL(bin->child);
 197       if (!label) label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 198
 199       wxASSERT_MSG( label != NULL , "wxChoice: invalid label" );
 200
 201       return label->label;
 202     }
 203     child = child->next;
 204     count++;
 205   }
 206
 207   wxFAIL_MSG( "wxChoice: string not found" );
 208
 209   return "";
 210 }
 211
 212 wxString wxChoice::GetStringSelection(void) const
 213 {
 214   wxCHECK_MSG( m_widget != NULL, "", "invalid choice" );
 215
 216   GtkLabel *label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 217
 218   wxASSERT_MSG( label != NULL , "wxChoice: invalid label" );
 219
 220   return label->label;
 221 }
 222
 223 int wxChoice::Number(void) const
 224 {
 225   wxCHECK_MSG( m_widget != NULL, 0, "invalid choice" );
 226
 227   GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 228   int count = 0;
 229   GList *child = menu_shell->children;
 230   while (child)
 231   {
 232     count++;
 233     child = child->next;
 234   }
 235   return count;
 236 }
 237
 238 void wxChoice::SetColumns( int WXUNUSED(n) )
 239 {
 240 }
 241
 242 void wxChoice::SetSelection( int n )
 243 {
 244   wxCHECK_RET( m_widget != NULL, "invalid choice" );
 245
 246   int tmp = n;
 247   gtk_option_menu_set_history( GTK_OPTION_MENU(m_widget), (gint)tmp );
 248
 249   gtk_choice_clicked_callback( (GtkWidget *) NULL, this );
 250 }
 251
 252 void wxChoice::SetStringSelection( const wxString &string )
 253 {
 254   wxCHECK_RET( m_widget != NULL, "invalid choice" );
 255
 256   int n = FindString( string );
 257   if (n != -1) SetSelection( n );
 258 }
 259
 260 void wxChoice::ApplyWidgetStyle()
 261 {
 262   SetWidgetStyle();
 263
 264   GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 265
 266   gtk_widget_set_style( m_widget, m_widgetStyle );
 267   gtk_widget_set_style( GTK_WIDGET( menu_shell ), m_widgetStyle );
 268
 269   GList *child = menu_shell->children;
 270   while (child)
 271   {
 272     gtk_widget_set_style( GTK_WIDGET( child->data ), m_widgetStyle );
 273
 274     GtkBin *bin = GTK_BIN( child->data );
 275     GtkWidget *label = (GtkWidget *) NULL;
 276     if (bin->child) label = bin->child;
 277     if (!label) label = GTK_BUTTON(m_widget)->child;
 278
 279     gtk_widget_set_style( label, m_widgetStyle );
 280
 281     child = child->next;
 282   }
 283 }
 284