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_signal_connect( GTK_OBJECT( item ), "activate",
  74       GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );
  75
  76     gtk_menu_append( GTK_MENU(menu), item );
  77
  78     gtk_widget_show( item );
  79     gtk_widget_realize( item );
  80     gtk_widget_realize( GTK_BIN(item)->child );
  81   }
  82   gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu );
  83
  84   PostCreation();
  85
  86   SetBackgroundColour( parent->GetBackgroundColour() );
  87
  88   Show( TRUE );
  89
  90   return TRUE;
  91 }
  92
  93 void wxChoice::Append( const wxString &item )
  94 {
  95   wxCHECK_RET( m_widget != NULL, "invalid choice" );
  96
  97   GtkWidget *menu = gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) );
  98   GtkWidget *menu_item = gtk_menu_item_new_with_label( item );
  99
 100   gtk_menu_append( GTK_MENU(menu), menu_item );
 101
 102   gtk_widget_realize( menu_item );
 103   gtk_widget_realize( GTK_BIN(menu_item)->child );
 104
 105   if (m_widgetStyle)
 106   {
 107     gtk_widget_set_style( menu_item, m_widgetStyle );
 108     gtk_widget_set_style( GTK_BIN(menu_item)->child, m_widgetStyle );
 109   }
 110
 111   gtk_signal_connect( GTK_OBJECT( menu_item ), "activate",
 112     GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );
 113
 114   gtk_widget_show( menu_item );
 115 }
 116
 117 void wxChoice::Clear(void)
 118 {
 119   wxCHECK_RET( m_widget != NULL, "invalid choice" );
 120
 121   gtk_option_menu_remove_menu( GTK_OPTION_MENU(m_widget) );
 122   GtkWidget *menu = gtk_menu_new();
 123   gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu );
 124 }
 125
 126 void wxChoice::Delete( int WXUNUSED(n) )
 127 {
 128   wxFAIL_MSG( "wxChoice:Delete not implemented" );
 129 }
 130
 131 int wxChoice::FindString( const wxString &string ) const
 132 {
 133   wxCHECK_MSG( m_widget != NULL, -1, "invalid choice" );
 134
 135   // If you read this code once and you think you understand
 136   // it, then you are very wrong. Robert Roebling.
 137
 138   GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 139   int count = 0;
 140   GList *child = menu_shell->children;
 141   while (child)
 142   {
 143     GtkBin *bin = GTK_BIN( child->data );
 144     GtkLabel *label = (GtkLabel *) NULL;
 145     if (bin->child) label = GTK_LABEL(bin->child);
 146     if (!label) label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 147
 148     wxASSERT_MSG( label != NULL , "wxChoice: invalid label" );
 149
 150     if (string == label->label) return count;
 151     child = child->next;
 152     count++;
 153   }
 154
 155   wxFAIL_MSG( "wxChoice: string not found" );
 156
 157   return -1;
 158 }
 159
 160 int wxChoice::GetColumns(void) const
 161 {
 162   return 1;
 163 }
 164
 165 int wxChoice::GetSelection(void)
 166 {
 167   wxCHECK_MSG( m_widget != NULL, -1, "invalid choice" );
 168
 169   GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 170   int count = 0;
 171   GList *child = menu_shell->children;
 172   while (child)
 173   {
 174     GtkBin *bin = GTK_BIN( child->data );
 175     if (!bin->child) return count;
 176     child = child->next;
 177     count++;
 178   }
 179
 180   wxFAIL_MSG( "wxChoice: no selection" );
 181
 182   return -1;
 183 }
 184
 185 wxString wxChoice::GetString( int n ) const
 186 {
 187   wxCHECK_MSG( m_widget != NULL, "", "invalid choice" );
 188
 189   GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 190   int count = 0;
 191   GList *child = menu_shell->children;
 192   while (child)
 193   {
 194     GtkBin *bin = GTK_BIN( child->data );
 195     if (count == n)
 196     {
 197       GtkLabel *label = (GtkLabel *) NULL;
 198       if (bin->child) label = GTK_LABEL(bin->child);
 199       if (!label) label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 200
 201       wxASSERT_MSG( label != NULL , "wxChoice: invalid label" );
 202
 203       return label->label;
 204     }
 205     child = child->next;
 206     count++;
 207   }
 208
 209   wxFAIL_MSG( "wxChoice: string not found" );
 210
 211   return "";
 212 }
 213
 214 wxString wxChoice::GetStringSelection(void) const
 215 {
 216   wxCHECK_MSG( m_widget != NULL, "", "invalid choice" );
 217
 218   GtkLabel *label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 219
 220   wxASSERT_MSG( label != NULL , "wxChoice: invalid label" );
 221
 222   return label->label;
 223 }
 224
 225 int wxChoice::Number(void) const
 226 {
 227   wxCHECK_MSG( m_widget != NULL, 0, "invalid choice" );
 228
 229   GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 230   int count = 0;
 231   GList *child = menu_shell->children;
 232   while (child)
 233   {
 234     count++;
 235     child = child->next;
 236   }
 237   return count;
 238 }
 239
 240 void wxChoice::SetColumns( int WXUNUSED(n) )
 241 {
 242 }
 243
 244 void wxChoice::SetSelection( int n )
 245 {
 246   wxCHECK_RET( m_widget != NULL, "invalid choice" );
 247
 248   int tmp = n;
 249   gtk_option_menu_set_history( GTK_OPTION_MENU(m_widget), (gint)tmp );
 250
 251   gtk_choice_clicked_callback( (GtkWidget *) NULL, this );
 252 }
 253
 254 void wxChoice::SetStringSelection( const wxString &string )
 255 {
 256   wxCHECK_RET( m_widget != NULL, "invalid choice" );
 257
 258   int n = FindString( string );
 259   if (n != -1) SetSelection( n );
 260 }
 261
 262 void wxChoice::SetFont( const wxFont &font )
 263 {
 264   wxCHECK_RET( m_widget != NULL, "invalid choice" );
 265
 266   wxControl::SetFont( font );
 267
 268   GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 269   GList *child = menu_shell->children;
 270   while (child)
 271   {
 272     GtkBin *bin = GTK_BIN( child->data );
 273     GtkWidget *label = (GtkWidget *) NULL;
 274     if (bin->child) label = bin->child;
 275     if (!label) label = GTK_BUTTON(m_widget)->child;
 276
 277     gtk_widget_set_style( label, GetWidgetStyle() );
 278
 279     child = child->next;
 280   }
 281 }
 282
 283 void wxChoice::SetBackgroundColour( const wxColour &colour )
 284 {
 285   wxCHECK_RET( m_widget != NULL, "invalid choice" );
 286
 287   wxControl::SetBackgroundColour( colour );
 288
 289   if (!m_backgroundColour.Ok()) return;
 290
 291   GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 292
 293   gtk_widget_set_style( m_widget, m_widgetStyle );
 294   gtk_widget_set_style( GTK_WIDGET( menu_shell ), m_widgetStyle );
 295
 296   GList *child = menu_shell->children;
 297   while (child)
 298   {
 299     gtk_widget_set_style( GTK_WIDGET( child->data ), m_widgetStyle );
 300     child = child->next;
 301   }
 302 }
 303
 304
 305