src/gtk/radiobut.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        radiobut.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 "radiobut.h"
  13 #endif
  14
  15 #include "wx/radiobut.h"
  16
  17 #if wxUSE_RADIOBOX
  18
  19 #include "gdk/gdk.h"
  20 #include "gtk/gtk.h"
  21
  22 //-----------------------------------------------------------------------------
  23 // idle system
  24 //-----------------------------------------------------------------------------
  25
  26 extern void wxapp_install_idle_handler();
  27 extern bool g_isIdle;
  28
  29 //-----------------------------------------------------------------------------
  30 // data
  31 //-----------------------------------------------------------------------------
  32
  33 extern bool g_blockEventsOnDrag;
  34
  35 //-----------------------------------------------------------------------------
  36 // "clicked"
  37 //-----------------------------------------------------------------------------
  38
  39 static
  40 void gtk_radiobutton_clicked_callback( GtkWidget *WXUNUSED(widget), wxRadioButton *rb )
  41 {
  42     if (g_isIdle) wxapp_install_idle_handler();
  43
  44     if (!rb->m_hasVMT) return;
  45
  46     if (g_blockEventsOnDrag) return;
  47
  48     wxCommandEvent event( wxEVT_COMMAND_RADIOBUTTON_SELECTED, rb->GetId());
  49     event.SetInt( rb->GetValue() );
  50     event.SetEventObject( rb );
  51     rb->GetEventHandler()->ProcessEvent( event );
  52 }
  53
  54 //-----------------------------------------------------------------------------
  55 // wxRadioButton
  56 //-----------------------------------------------------------------------------
  57
  58 IMPLEMENT_DYNAMIC_CLASS(wxRadioButton,wxControl)
  59
  60 bool wxRadioButton::Create( wxWindow *parent, wxWindowID id, const wxString& label,
  61   const wxPoint& pos,  const wxSize& size, long style,
  62   const wxValidator& validator, const wxString& name )
  63 {
  64     m_acceptsFocus = TRUE;
  65     m_needParent = TRUE;
  66     m_isRadioButton = TRUE;
  67
  68     if (!PreCreation( parent, pos, size ) ||
  69         !CreateBase( parent, id, pos, size, style, validator, name ))
  70     {
  71         wxFAIL_MSG( wxT("wxRadioButton creation failed") );
  72         return FALSE;
  73     }
  74
  75     if (HasFlag(wxRB_GROUP))
  76     {
  77         /* start a new group */
  78         m_radioButtonGroup = (GSList*) NULL;
  79     }
  80     else
  81     {
  82         /* search backward for last group start */
  83         wxRadioButton *chief = (wxRadioButton*) NULL;
  84         wxWindowList::Node *node = parent->GetChildren().GetLast();
  85         while (node)
  86         {
  87             wxWindow *child = node->GetData();
  88             if (child->m_isRadioButton)
  89             {
  90                  chief = (wxRadioButton*) child;
  91                  if (child->HasFlag(wxRB_GROUP)) break;
  92             }
  93             node = node->GetPrevious();
  94         }
  95         if (chief)
  96         {
  97             /* we are part of the group started by chief */
  98             m_radioButtonGroup = gtk_radio_button_group( GTK_RADIO_BUTTON(chief->m_widget) );
  99         }
 100         else
 101         {
 102             /* start a new group */
 103             m_radioButtonGroup = (GSList*) NULL;
 104         }
 105     }
 106
 107     m_widget = gtk_radio_button_new_with_label( m_radioButtonGroup, label.mbc_str() );
 108
 109     SetLabel(label);
 110
 111     wxSize newSize = size;
 112     if (newSize.x == -1) newSize.x = 22+gdk_string_measure( m_widget->style->font, label.mbc_str() );
 113     if (newSize.y == -1) newSize.y = 26;
 114     SetSize( newSize.x, newSize.y );
 115
 116     gtk_signal_connect( GTK_OBJECT(m_widget), "clicked",
 117       GTK_SIGNAL_FUNC(gtk_radiobutton_clicked_callback), (gpointer*)this );
 118
 119     m_parent->DoAddChild( this );
 120
 121     PostCreation();
 122
 123     SetBackgroundColour( parent->GetBackgroundColour() );
 124     SetForegroundColour( parent->GetForegroundColour() );
 125     SetFont( parent->GetFont() );
 126
 127     Show( TRUE );
 128
 129     return TRUE;
 130 }
 131
 132 void wxRadioButton::SetLabel( const wxString& label )
 133 {
 134     wxCHECK_RET( m_widget != NULL, wxT("invalid radiobutton") );
 135
 136     wxControl::SetLabel( label );
 137     GtkButton *bin = GTK_BUTTON( m_widget );
 138     GtkLabel *g_label = GTK_LABEL( bin->child );
 139     gtk_label_set( g_label, GetLabel().mbc_str() );
 140 }
 141
 142 void wxRadioButton::SetValue( bool val )
 143 {
 144     wxCHECK_RET( m_widget != NULL, wxT("invalid radiobutton") );
 145
 146     if (val == GetValue())
 147         return;
 148
 149     gtk_signal_disconnect_by_func( GTK_OBJECT(m_widget),
 150       GTK_SIGNAL_FUNC(gtk_radiobutton_clicked_callback), (gpointer*)this );
 151
 152     if (val)
 153     {
 154         gtk_toggle_button_set_state( GTK_TOGGLE_BUTTON(m_widget), TRUE );
 155     }
 156     else
 157     {
 158         // should give an assert
 159     }
 160
 161     gtk_signal_connect( GTK_OBJECT(m_widget), "clicked",
 162       GTK_SIGNAL_FUNC(gtk_radiobutton_clicked_callback), (gpointer*)this );
 163 }
 164
 165 bool wxRadioButton::GetValue() const
 166 {
 167     wxCHECK_MSG( m_widget != NULL, FALSE, wxT("invalid radiobutton") );
 168
 169     return GTK_TOGGLE_BUTTON(m_widget)->active;
 170 }
 171
 172 bool wxRadioButton::Enable( bool enable )
 173 {
 174     if ( !wxControl::Enable( enable ) )
 175         return FALSE;
 176
 177     gtk_widget_set_sensitive( GTK_BUTTON(m_widget)->child, enable );
 178
 179     return TRUE;
 180 }
 181
 182 void wxRadioButton::ApplyWidgetStyle()
 183 {
 184     SetWidgetStyle();
 185     gtk_widget_set_style( m_widget, m_widgetStyle );
 186     gtk_widget_set_style( GTK_BUTTON(m_widget)->child, m_widgetStyle );
 187 }
 188
 189 #endif