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 extern wxCursor   g_globalCursor;
  35
  36 //-----------------------------------------------------------------------------
  37 // "clicked"
  38 //-----------------------------------------------------------------------------
  39
  40 static
  41 void gtk_radiobutton_clicked_callback( GtkWidget *WXUNUSED(widget), wxRadioButton *rb )
  42 {
  43     if (g_isIdle) wxapp_install_idle_handler();
  44
  45     if (!rb->m_hasVMT) return;
  46
  47     if (g_blockEventsOnDrag) return;
  48
  49     wxCommandEvent event( wxEVT_COMMAND_RADIOBUTTON_SELECTED, rb->GetId());
  50     event.SetInt( rb->GetValue() );
  51     event.SetEventObject( rb );
  52     rb->GetEventHandler()->ProcessEvent( event );
  53 }
  54
  55 //-----------------------------------------------------------------------------
  56 // wxRadioButton
  57 //-----------------------------------------------------------------------------
  58
  59 IMPLEMENT_DYNAMIC_CLASS(wxRadioButton,wxControl)
  60
  61 bool wxRadioButton::Create( wxWindow *parent, wxWindowID id, const wxString& label,
  62   const wxPoint& pos,  const wxSize& size, long style,
  63   const wxValidator& validator, const wxString& name )
  64 {
  65     m_acceptsFocus = TRUE;
  66     m_needParent = TRUE;
  67     m_isRadioButton = TRUE;
  68
  69     if (!PreCreation( parent, pos, size ) ||
  70         !CreateBase( parent, id, pos, size, style, validator, name ))
  71     {
  72         wxFAIL_MSG( wxT("wxRadioButton creation failed") );
  73         return FALSE;
  74     }
  75
  76     if (HasFlag(wxRB_GROUP))
  77     {
  78         /* start a new group */
  79         m_radioButtonGroup = (GSList*) NULL;
  80     }
  81     else
  82     {
  83         /* search backward for last group start */
  84         wxRadioButton *chief = (wxRadioButton*) NULL;
  85         wxWindowList::Node *node = parent->GetChildren().GetLast();
  86         while (node)
  87         {
  88             wxWindow *child = node->GetData();
  89             if (child->m_isRadioButton)
  90             {
  91                  chief = (wxRadioButton*) child;
  92                  if (child->HasFlag(wxRB_GROUP)) break;
  93             }
  94             node = node->GetPrevious();
  95         }
  96         if (chief)
  97         {
  98             /* we are part of the group started by chief */
  99             m_radioButtonGroup = gtk_radio_button_group( GTK_RADIO_BUTTON(chief->m_widget) );
 100         }
 101         else
 102         {
 103             /* start a new group */
 104             m_radioButtonGroup = (GSList*) NULL;
 105         }
 106     }
 107
 108     m_widget = gtk_radio_button_new_with_label( m_radioButtonGroup, label.mbc_str() );
 109
 110     SetLabel(label);
 111
 112     wxSize newSize = size;
 113     if (newSize.x == -1) newSize.x = 22+gdk_string_measure( m_widget->style->font, label.mbc_str() );
 114     if (newSize.y == -1) newSize.y = 26;
 115     SetSize( newSize.x, newSize.y );
 116
 117     gtk_signal_connect( GTK_OBJECT(m_widget), "clicked",
 118       GTK_SIGNAL_FUNC(gtk_radiobutton_clicked_callback), (gpointer*)this );
 119
 120     m_parent->DoAddChild( this );
 121
 122     PostCreation();
 123
 124     SetBackgroundColour( parent->GetBackgroundColour() );
 125     SetForegroundColour( parent->GetForegroundColour() );
 126     SetFont( parent->GetFont() );
 127
 128     Show( TRUE );
 129
 130     return TRUE;
 131 }
 132
 133 void wxRadioButton::SetLabel( const wxString& label )
 134 {
 135     wxCHECK_RET( m_widget != NULL, wxT("invalid radiobutton") );
 136
 137     wxControl::SetLabel( label );
 138     GtkButton *bin = GTK_BUTTON( m_widget );
 139     GtkLabel *g_label = GTK_LABEL( bin->child );
 140     gtk_label_set( g_label, GetLabel().mbc_str() );
 141 }
 142
 143 void wxRadioButton::SetValue( bool val )
 144 {
 145     wxCHECK_RET( m_widget != NULL, wxT("invalid radiobutton") );
 146
 147     if (val == GetValue())
 148         return;
 149
 150     gtk_signal_disconnect_by_func( GTK_OBJECT(m_widget),
 151       GTK_SIGNAL_FUNC(gtk_radiobutton_clicked_callback), (gpointer*)this );
 152
 153     if (val)
 154     {
 155         gtk_toggle_button_set_state( GTK_TOGGLE_BUTTON(m_widget), TRUE );
 156     }
 157     else
 158     {
 159         // should give an assert
 160     }
 161
 162     gtk_signal_connect( GTK_OBJECT(m_widget), "clicked",
 163       GTK_SIGNAL_FUNC(gtk_radiobutton_clicked_callback), (gpointer*)this );
 164 }
 165
 166 bool wxRadioButton::GetValue() const
 167 {
 168     wxCHECK_MSG( m_widget != NULL, FALSE, wxT("invalid radiobutton") );
 169
 170     return GTK_TOGGLE_BUTTON(m_widget)->active;
 171 }
 172
 173 bool wxRadioButton::Enable( bool enable )
 174 {
 175     if ( !wxControl::Enable( enable ) )
 176         return FALSE;
 177
 178     gtk_widget_set_sensitive( GTK_BUTTON(m_widget)->child, enable );
 179
 180     return TRUE;
 181 }
 182
 183 void wxRadioButton::ApplyWidgetStyle()
 184 {
 185     SetWidgetStyle();
 186     gtk_widget_set_style( m_widget, m_widgetStyle );
 187     gtk_widget_set_style( GTK_BUTTON(m_widget)->child, m_widgetStyle );
 188 }
 189
 190 bool wxRadioButton::IsOwnGtkWindow( GdkWindow *window )
 191 {
 192     return (window == GTK_TOGGLE_BUTTON(m_widget)->event_window);
 193 }
 194
 195 void wxRadioButton::OnInternalIdle()
 196 {
 197     wxCursor cursor = m_cursor;
 198     if (g_globalCursor.Ok()) cursor = g_globalCursor;
 199
 200     if (GTK_TOGGLE_BUTTON(m_widget)->event_window && cursor.Ok())
 201     {
 202         /* I now set the cursor the anew in every OnInternalIdle call
 203            as setting the cursor in a parent window also effects the
 204            windows above so that checking for the current cursor is
 205            not possible. */
 206
 207         gdk_window_set_cursor( GTK_TOGGLE_BUTTON(m_widget)->event_window, cursor.GetCursor() );
 208     }
 209
 210     UpdateWindowUI();
 211 }
 212
 213 #endif