src/gtk/radiobut.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk/radiobut.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 // For compilers that support precompilation, includes "wx.h".
  11 #include "wx/wxprec.h"
  12
  13 #if wxUSE_RADIOBTN
  14
  15 #include "wx/radiobut.h"
  16
  17 #include "wx/gtk/private.h"
  18
  19 //-----------------------------------------------------------------------------
  20 // data
  21 //-----------------------------------------------------------------------------
  22
  23 extern bool           g_blockEventsOnDrag;
  24
  25 //-----------------------------------------------------------------------------
  26 // "clicked"
  27 //-----------------------------------------------------------------------------
  28
  29 extern "C" {
  30 static
  31 void gtk_radiobutton_clicked_callback( GtkToggleButton *button, wxRadioButton *rb )
  32 {
  33     if (!rb->m_hasVMT) return;
  34
  35     if (g_blockEventsOnDrag) return;
  36
  37     if (!gtk_toggle_button_get_active(button)) return;
  38
  39     wxCommandEvent event( wxEVT_COMMAND_RADIOBUTTON_SELECTED, rb->GetId());
  40     event.SetInt( rb->GetValue() );
  41     event.SetEventObject( rb );
  42     rb->HandleWindowEvent( event );
  43 }
  44 }
  45
  46 //-----------------------------------------------------------------------------
  47 // wxRadioButton
  48 //-----------------------------------------------------------------------------
  49
  50 bool wxRadioButton::Create( wxWindow *parent,
  51                             wxWindowID id,
  52                             const wxString& label,
  53                             const wxPoint& pos,
  54                             const wxSize& size,
  55                             long style,
  56                             const wxValidator& validator,
  57                             const wxString& name )
  58 {
  59     if (!PreCreation( parent, pos, size ) ||
  60         !CreateBase( parent, id, pos, size, style, validator, name ))
  61     {
  62         wxFAIL_MSG( wxT("wxRadioButton creation failed") );
  63         return false;
  64     }
  65
  66     // Check if this radio button should be put into an existing group. This
  67     // shouldn't be done if it's given a style to explicitly start a new group
  68     // or if it's not meant to be a part of a group at all.
  69     GSList* radioButtonGroup = NULL;
  70     if (!HasFlag(wxRB_GROUP) && !HasFlag(wxRB_SINGLE))
  71     {
  72         // search backward for last group start
  73         wxWindowList::compatibility_iterator node = parent->GetChildren().GetLast();
  74         for (; node; node = node->GetPrevious())
  75         {
  76             wxWindow *child = node->GetData();
  77
  78             // We stop at the first previous radio button in any case as it
  79             // wouldn't make sense to put this button in a group with another
  80             // one if there is a radio button that is not part of the same
  81             // group between them.
  82             if (wxIsKindOf(child, wxRadioButton))
  83             {
  84                 // Any preceding radio button can be used to get its group, not
  85                 // necessarily one with wxRB_GROUP style, but exclude
  86                 // wxRB_SINGLE ones as their group should never be shared.
  87                 if (!child->HasFlag(wxRB_SINGLE))
  88                 {
  89                     radioButtonGroup = gtk_radio_button_get_group(
  90                         GTK_RADIO_BUTTON(child->m_widget));
  91                 }
  92
  93                 break;
  94             }
  95         }
  96     }
  97
  98     m_widget = gtk_radio_button_new_with_label( radioButtonGroup, wxGTK_CONV( label ) );
  99     g_object_ref(m_widget);
 100
 101     SetLabel(label);
 102
 103     g_signal_connect_after (m_widget, "clicked",
 104                             G_CALLBACK (gtk_radiobutton_clicked_callback), this);
 105
 106     m_parent->DoAddChild( this );
 107
 108     PostCreation(size);
 109
 110     return true;
 111 }
 112
 113 void wxRadioButton::SetLabel( const wxString& label )
 114 {
 115     wxCHECK_RET( m_widget != NULL, wxT("invalid radiobutton") );
 116
 117     // save the original label
 118     wxControlBase::SetLabel(label);
 119
 120     GTKSetLabelForLabel(GTK_LABEL(gtk_bin_get_child(GTK_BIN(m_widget))), label);
 121 }
 122
 123 void wxRadioButton::SetValue( bool val )
 124 {
 125     wxCHECK_RET( m_widget != NULL, wxT("invalid radiobutton") );
 126
 127     if (val == GetValue())
 128         return;
 129
 130     g_signal_handlers_block_by_func(
 131         m_widget, (void*)gtk_radiobutton_clicked_callback, this);
 132
 133     if (val)
 134     {
 135         gtk_toggle_button_set_active( GTK_TOGGLE_BUTTON(m_widget), TRUE );
 136     }
 137     else
 138     {
 139         // should give an assert
 140         // RL - No it shouldn't.  A wxGenericValidator might try to set it
 141         //      as FALSE.  Failing silently is probably TRTTD here.
 142     }
 143
 144     g_signal_handlers_unblock_by_func(
 145         m_widget, (void*)gtk_radiobutton_clicked_callback, this);
 146 }
 147
 148 bool wxRadioButton::GetValue() const
 149 {
 150     wxCHECK_MSG( m_widget != NULL, false, wxT("invalid radiobutton") );
 151
 152     return gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(m_widget)) != 0;
 153 }
 154
 155 bool wxRadioButton::Enable( bool enable )
 156 {
 157     if (!base_type::Enable(enable))
 158         return false;
 159
 160     gtk_widget_set_sensitive(gtk_bin_get_child(GTK_BIN(m_widget)), enable);
 161
 162     if (enable)
 163         GTKFixSensitivity();
 164
 165     return true;
 166 }
 167
 168 void wxRadioButton::DoApplyWidgetStyle(GtkRcStyle *style)
 169 {
 170     gtk_widget_modify_style(m_widget, style);
 171     gtk_widget_modify_style(gtk_bin_get_child(GTK_BIN(m_widget)), style);
 172 }
 173
 174 GdkWindow *
 175 wxRadioButton::GTKGetWindow(wxArrayGdkWindows& WXUNUSED(windows)) const
 176 {
 177     return GTK_BUTTON(m_widget)->event_window;
 178 }
 179
 180 // static
 181 wxVisualAttributes
 182 wxRadioButton::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 183 {
 184     wxVisualAttributes attr;
 185     // NB: we need toplevel window so that GTK+ can find the right style
 186     GtkWidget *wnd = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 187     GtkWidget* widget = gtk_radio_button_new_with_label(NULL, "");
 188     gtk_container_add(GTK_CONTAINER(wnd), widget);
 189     attr = GetDefaultAttributesFromGTKWidget(widget);
 190     gtk_widget_destroy(wnd);
 191     return attr;
 192 }
 193
 194
 195 #endif