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/defs.h"
  16
  17 #if wxUSE_RADIOBOX
  18
  19 #include "wx/radiobut.h"
  20
  21 #include <gdk/gdk.h>
  22 #include <gtk/gtk.h>
  23
  24 //-----------------------------------------------------------------------------
  25 // idle system
  26 //-----------------------------------------------------------------------------
  27
  28 extern void wxapp_install_idle_handler();
  29 extern bool g_isIdle;
  30
  31 //-----------------------------------------------------------------------------
  32 // data
  33 //-----------------------------------------------------------------------------
  34
  35 extern bool       g_blockEventsOnDrag;
  36 extern wxCursor   g_globalCursor;
  37
  38 //-----------------------------------------------------------------------------
  39 // "clicked"
  40 //-----------------------------------------------------------------------------
  41
  42 static
  43 void gtk_radiobutton_clicked_callback( GtkWidget *WXUNUSED(widget), wxRadioButton *rb )
  44 {
  45     if (g_isIdle) wxapp_install_idle_handler();
  46
  47     if (!rb->m_hasVMT) return;
  48
  49     if (g_blockEventsOnDrag) return;
  50
  51     wxCommandEvent event( wxEVT_COMMAND_RADIOBUTTON_SELECTED, rb->GetId());
  52     event.SetInt( rb->GetValue() );
  53     event.SetEventObject( rb );
  54     rb->GetEventHandler()->ProcessEvent( event );
  55 }
  56
  57 //-----------------------------------------------------------------------------
  58 // wxRadioButton
  59 //-----------------------------------------------------------------------------
  60
  61 IMPLEMENT_DYNAMIC_CLASS(wxRadioButton,wxControl)
  62
  63 bool wxRadioButton::Create( wxWindow *parent, wxWindowID id, const wxString& label,
  64   const wxPoint& pos,  const wxSize& size, long style,
  65   const wxValidator& validator, const wxString& name )
  66 {
  67     m_acceptsFocus = TRUE;
  68     m_needParent = TRUE;
  69     m_isRadioButton = TRUE;
  70
  71     if (!PreCreation( parent, pos, size ) ||
  72         !CreateBase( parent, id, pos, size, style, validator, name ))
  73     {
  74         wxFAIL_MSG( wxT("wxRadioButton creation failed") );
  75         return FALSE;
  76     }
  77
  78     if (HasFlag(wxRB_GROUP))
  79     {
  80         /* start a new group */
  81         m_radioButtonGroup = (GSList*) NULL;
  82     }
  83     else
  84     {
  85         /* search backward for last group start */
  86         wxRadioButton *chief = (wxRadioButton*) NULL;
  87         wxWindowList::Node *node = parent->GetChildren().GetLast();
  88         while (node)
  89             {
  90                 wxWindow *child = node->GetData();
  91                 if (child->m_isRadioButton)
  92                 {
  93                     chief = (wxRadioButton*) child;
  94                         if (child->HasFlag(wxRB_GROUP)) break;
  95                 }
  96                 node = node->GetPrevious();
  97         }
  98             if (chief)
  99             {
 100             /* we are part of the group started by chief */
 101                 m_radioButtonGroup = gtk_radio_button_group( GTK_RADIO_BUTTON(chief->m_widget) );
 102             }
 103             else
 104             {
 105             /* start a new group */
 106             m_radioButtonGroup = (GSList*) NULL;
 107             }
 108     }
 109
 110     m_widget = gtk_radio_button_new_with_label( m_radioButtonGroup, label.mbc_str() );
 111
 112     SetLabel(label);
 113
 114     gtk_signal_connect( GTK_OBJECT(m_widget), "clicked",
 115       GTK_SIGNAL_FUNC(gtk_radiobutton_clicked_callback), (gpointer*)this );
 116
 117     m_parent->DoAddChild( this );
 118
 119     PostCreation();
 120
 121     SetFont( parent->GetFont() );
 122
 123     wxSize size_best( DoGetBestSize() );
 124     wxSize new_size( size );
 125     if (new_size.x == -1)
 126         new_size.x = size_best.x;
 127     if (new_size.y == -1)
 128         new_size.y = size_best.y;
 129     if ((new_size.x != size.x) || (new_size.y != size.y))
 130         SetSize( new_size.x, new_size.y );
 131
 132     SetBackgroundColour( parent->GetBackgroundColour() );
 133     SetForegroundColour( parent->GetForegroundColour() );
 134
 135     Show( TRUE );
 136
 137     return TRUE;
 138 }
 139
 140 void wxRadioButton::SetLabel( const wxString& label )
 141 {
 142     wxCHECK_RET( m_widget != NULL, wxT("invalid radiobutton") );
 143
 144     wxControl::SetLabel( label );
 145     GtkButton *bin = GTK_BUTTON( m_widget );
 146     GtkLabel *g_label = GTK_LABEL( bin->child );
 147     gtk_label_set( g_label, GetLabel().mbc_str() );
 148 }
 149
 150 void wxRadioButton::SetValue( bool val )
 151 {
 152     wxCHECK_RET( m_widget != NULL, wxT("invalid radiobutton") );
 153
 154     if (val == GetValue())
 155         return;
 156
 157     gtk_signal_disconnect_by_func( GTK_OBJECT(m_widget),
 158       GTK_SIGNAL_FUNC(gtk_radiobutton_clicked_callback), (gpointer*)this );
 159
 160     if (val)
 161     {
 162         gtk_toggle_button_set_state( GTK_TOGGLE_BUTTON(m_widget), TRUE );
 163     }
 164     else
 165     {
 166         // should give an assert
 167         // RL - No it shouldn't.  A wxGenericValidator might try to set it
 168         //      as FALSE.  Failing silently is probably TRTTD here.
 169     }
 170
 171     gtk_signal_connect( GTK_OBJECT(m_widget), "clicked",
 172       GTK_SIGNAL_FUNC(gtk_radiobutton_clicked_callback), (gpointer*)this );
 173 }
 174
 175 bool wxRadioButton::GetValue() const
 176 {
 177     wxCHECK_MSG( m_widget != NULL, FALSE, wxT("invalid radiobutton") );
 178
 179     return GTK_TOGGLE_BUTTON(m_widget)->active;
 180 }
 181
 182 bool wxRadioButton::Enable( bool enable )
 183 {
 184     if ( !wxControl::Enable( enable ) )
 185         return FALSE;
 186
 187     gtk_widget_set_sensitive( GTK_BUTTON(m_widget)->child, enable );
 188
 189     return TRUE;
 190 }
 191
 192 void wxRadioButton::ApplyWidgetStyle()
 193 {
 194     SetWidgetStyle();
 195     gtk_widget_set_style( m_widget, m_widgetStyle );
 196     gtk_widget_set_style( GTK_BUTTON(m_widget)->child, m_widgetStyle );
 197 }
 198
 199 bool wxRadioButton::IsOwnGtkWindow( GdkWindow *window )
 200 {
 201     return (window == GTK_TOGGLE_BUTTON(m_widget)->event_window);
 202 }
 203
 204 void wxRadioButton::OnInternalIdle()
 205 {
 206     wxCursor cursor = m_cursor;
 207     if (g_globalCursor.Ok()) cursor = g_globalCursor;
 208
 209     if (GTK_TOGGLE_BUTTON(m_widget)->event_window && cursor.Ok())
 210     {
 211         /* I now set the cursor the anew in every OnInternalIdle call
 212            as setting the cursor in a parent window also effects the
 213            windows above so that checking for the current cursor is
 214            not possible. */
 215
 216            gdk_window_set_cursor( GTK_TOGGLE_BUTTON(m_widget)->event_window, cursor.GetCursor() );
 217     }
 218
 219     UpdateWindowUI();
 220 }
 221
 222 wxSize wxRadioButton::DoGetBestSize() const
 223 {
 224     return wxControl::DoGetBestSize();
 225 }
 226
 227 #endif