src/gtk1/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   m_parent->AddChild( this );
  86
  87   (m_parent->m_insertCallback)( m_parent, this );
  88
  89   PostCreation();
  90
  91   SetBackgroundColour( parent->GetBackgroundColour() );
  92   SetForegroundColour( parent->GetForegroundColour() );
  93
  94   Show( TRUE );
  95
  96   return TRUE;
  97 }
  98
  99 void wxChoice::Append( const wxString &item )
 100 {
 101   wxCHECK_RET( m_widget != NULL, "invalid choice" );
 102
 103   GtkWidget *menu = gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) );
 104   GtkWidget *menu_item = gtk_menu_item_new_with_label( item );
 105
 106   gtk_menu_append( GTK_MENU(menu), menu_item );
 107
 108   gtk_widget_realize( menu_item );
 109   gtk_widget_realize( GTK_BIN(menu_item)->child );
 110
 111   if (m_widgetStyle) ApplyWidgetStyle();
 112
 113   gtk_signal_connect( GTK_OBJECT( menu_item ), "activate",
 114     GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );
 115
 116   gtk_widget_show( menu_item );
 117 }
 118
 119 void wxChoice::Clear(void)
 120 {
 121   wxCHECK_RET( m_widget != NULL, "invalid choice" );
 122
 123   gtk_option_menu_remove_menu( GTK_OPTION_MENU(m_widget) );
 124   GtkWidget *menu = gtk_menu_new();
 125   gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu );
 126 }
 127
 128 void wxChoice::Delete( int WXUNUSED(n) )
 129 {
 130   wxFAIL_MSG( "wxChoice:Delete not implemented" );
 131 }
 132
 133 int wxChoice::FindString( const wxString &string ) const
 134 {
 135   wxCHECK_MSG( m_widget != NULL, -1, "invalid choice" );
 136
 137   // If you read this code once and you think you understand
 138   // it, then you are very wrong. Robert Roebling.
 139
 140   GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 141   int count = 0;
 142   GList *child = menu_shell->children;
 143   while (child)
 144   {
 145     GtkBin *bin = GTK_BIN( child->data );
 146     GtkLabel *label = (GtkLabel *) NULL;
 147     if (bin->child) label = GTK_LABEL(bin->child);
 148     if (!label) label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 149
 150     wxASSERT_MSG( label != NULL , "wxChoice: invalid label" );
 151
 152     if (string == label->label) return count;
 153     child = child->next;
 154     count++;
 155   }
 156
 157   wxFAIL_MSG( "wxChoice: string not found" );
 158
 159   return -1;
 160 }
 161
 162 int wxChoice::GetColumns(void) const
 163 {
 164   return 1;
 165 }
 166
 167 int wxChoice::GetSelection(void)
 168 {
 169   wxCHECK_MSG( m_widget != NULL, -1, "invalid choice" );
 170
 171   GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 172   int count = 0;
 173   GList *child = menu_shell->children;
 174   while (child)
 175   {
 176     GtkBin *bin = GTK_BIN( child->data );
 177     if (!bin->child) return count;
 178     child = child->next;
 179     count++;
 180   }
 181
 182   wxFAIL_MSG( "wxChoice: no selection" );
 183
 184   return -1;
 185 }
 186
 187 wxString wxChoice::GetString( int n ) const
 188 {
 189   wxCHECK_MSG( m_widget != NULL, "", "invalid choice" );
 190
 191   GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 192   int count = 0;
 193   GList *child = menu_shell->children;
 194   while (child)
 195   {
 196     GtkBin *bin = GTK_BIN( child->data );
 197     if (count == n)
 198     {
 199       GtkLabel *label = (GtkLabel *) NULL;
 200       if (bin->child) label = GTK_LABEL(bin->child);
 201       if (!label) label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 202
 203       wxASSERT_MSG( label != NULL , "wxChoice: invalid label" );
 204
 205       return label->label;
 206     }
 207     child = child->next;
 208     count++;
 209   }
 210
 211   wxFAIL_MSG( "wxChoice: string not found" );
 212
 213   return "";
 214 }
 215
 216 wxString wxChoice::GetStringSelection(void) const
 217 {
 218   wxCHECK_MSG( m_widget != NULL, "", "invalid choice" );
 219
 220   GtkLabel *label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 221
 222   wxASSERT_MSG( label != NULL , "wxChoice: invalid label" );
 223
 224   return label->label;
 225 }
 226
 227 int wxChoice::Number(void) const
 228 {
 229   wxCHECK_MSG( m_widget != NULL, 0, "invalid choice" );
 230
 231   GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 232   int count = 0;
 233   GList *child = menu_shell->children;
 234   while (child)
 235   {
 236     count++;
 237     child = child->next;
 238   }
 239   return count;
 240 }
 241
 242 void wxChoice::SetColumns( int WXUNUSED(n) )
 243 {
 244 }
 245
 246 void wxChoice::SetSelection( int n )
 247 {
 248   wxCHECK_RET( m_widget != NULL, "invalid choice" );
 249
 250   int tmp = n;
 251   gtk_option_menu_set_history( GTK_OPTION_MENU(m_widget), (gint)tmp );
 252
 253   gtk_choice_clicked_callback( (GtkWidget *) NULL, this );
 254 }
 255
 256 void wxChoice::SetStringSelection( const wxString &string )
 257 {
 258   wxCHECK_RET( m_widget != NULL, "invalid choice" );
 259
 260   int n = FindString( string );
 261   if (n != -1) SetSelection( n );
 262 }
 263
 264 void wxChoice::ApplyWidgetStyle()
 265 {
 266   SetWidgetStyle();
 267
 268   GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 269
 270   gtk_widget_set_style( m_widget, m_widgetStyle );
 271   gtk_widget_set_style( GTK_WIDGET( menu_shell ), m_widgetStyle );
 272
 273   GList *child = menu_shell->children;
 274   while (child)
 275   {
 276     gtk_widget_set_style( GTK_WIDGET( child->data ), m_widgetStyle );
 277
 278     GtkBin *bin = GTK_BIN( child->data );
 279     GtkWidget *label = (GtkWidget *) NULL;
 280     if (bin->child) label = bin->child;
 281     if (!label) label = GTK_BUTTON(m_widget)->child;
 282
 283     gtk_widget_set_style( label, m_widgetStyle );
 284
 285     child = child->next;
 286   }
 287 }
 288