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( GtkToggleButton *button, 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     if (!button->active) return;
  52
  53     if (rb->m_blockEvent) return;
  54
  55     wxCommandEvent event( wxEVT_COMMAND_RADIOBUTTON_SELECTED, rb->GetId());
  56     event.SetInt( rb->GetValue() );
  57     event.SetEventObject( rb );
  58     rb->GetEventHandler()->ProcessEvent( event );
  59 }
  60
  61 //-----------------------------------------------------------------------------
  62 // wxRadioButton
  63 //-----------------------------------------------------------------------------
  64
  65 IMPLEMENT_DYNAMIC_CLASS(wxRadioButton,wxControl)
  66
  67 bool wxRadioButton::Create( wxWindow *parent, wxWindowID id, const wxString& label,
  68   const wxPoint& pos,  const wxSize& size, long style,
  69   const wxValidator& validator, const wxString& name )
  70 {
  71     m_acceptsFocus = TRUE;
  72     m_needParent = TRUE;
  73     m_isRadioButton = TRUE;
  74
  75     m_blockEvent = FALSE;
  76
  77     if (!PreCreation( parent, pos, size ) ||
  78         !CreateBase( parent, id, pos, size, style, validator, name ))
  79     {
  80         wxFAIL_MSG( wxT("wxRadioButton creation failed") );
  81         return FALSE;
  82     }
  83
  84     if (HasFlag(wxRB_GROUP))
  85     {
  86         // start a new group
  87         m_radioButtonGroup = (GSList*) NULL;
  88     }
  89     else
  90     {
  91         // search backward for last group start
  92         wxRadioButton *chief = (wxRadioButton*) NULL;
  93         wxWindowList::Node *node = parent->GetChildren().GetLast();
  94         while (node)
  95         {
  96             wxWindow *child = node->GetData();
  97             if (child->m_isRadioButton)
  98             {
  99                 chief = (wxRadioButton*) child;
 100                 if (child->HasFlag(wxRB_GROUP)) break;
 101             }
 102             node = node->GetPrevious();
 103         }
 104         if (chief)
 105         {
 106             // we are part of the group started by chief
 107             m_radioButtonGroup = gtk_radio_button_group( GTK_RADIO_BUTTON(chief->m_widget) );
 108         }
 109         else
 110         {
 111             // start a new group
 112             m_radioButtonGroup = (GSList*) NULL;
 113         }
 114     }
 115
 116     m_widget = gtk_radio_button_new_with_label( m_radioButtonGroup, label.mbc_str() );
 117
 118     SetLabel(label);
 119
 120     gtk_signal_connect( GTK_OBJECT(m_widget), "clicked",
 121       GTK_SIGNAL_FUNC(gtk_radiobutton_clicked_callback), (gpointer*)this );
 122
 123     m_parent->DoAddChild( this );
 124
 125     PostCreation();
 126
 127     SetFont( parent->GetFont() );
 128
 129     wxSize size_best( DoGetBestSize() );
 130     wxSize new_size( size );
 131     if (new_size.x == -1)
 132         new_size.x = size_best.x;
 133     if (new_size.y == -1)
 134         new_size.y = size_best.y;
 135     if ((new_size.x != size.x) || (new_size.y != size.y))
 136         SetSize( new_size.x, new_size.y );
 137
 138     SetBackgroundColour( parent->GetBackgroundColour() );
 139     SetForegroundColour( parent->GetForegroundColour() );
 140
 141     Show( TRUE );
 142
 143     return TRUE;
 144 }
 145
 146 void wxRadioButton::SetLabel( const wxString& label )
 147 {
 148     wxCHECK_RET( m_widget != NULL, wxT("invalid radiobutton") );
 149
 150     wxControl::SetLabel( label );
 151     GtkButton *bin = GTK_BUTTON( m_widget );
 152     GtkLabel *g_label = GTK_LABEL( bin->child );
 153     gtk_label_set( g_label, GetLabel().mbc_str() );
 154 }
 155
 156 void wxRadioButton::SetValue( bool val )
 157 {
 158     wxCHECK_RET( m_widget != NULL, wxT("invalid radiobutton") );
 159
 160     if (val == GetValue())
 161         return;
 162
 163     m_blockEvent = TRUE;
 164
 165     if (val)
 166     {
 167         gtk_toggle_button_set_active( GTK_TOGGLE_BUTTON(m_widget), TRUE );
 168     }
 169     else
 170     {
 171         // should give an assert
 172         // RL - No it shouldn't.  A wxGenericValidator might try to set it
 173         //      as FALSE.  Failing silently is probably TRTTD here.
 174     }
 175
 176     m_blockEvent = FALSE;
 177 }
 178
 179 bool wxRadioButton::GetValue() const
 180 {
 181     wxCHECK_MSG( m_widget != NULL, FALSE, wxT("invalid radiobutton") );
 182
 183     return GTK_TOGGLE_BUTTON(m_widget)->active;
 184 }
 185
 186 bool wxRadioButton::Enable( bool enable )
 187 {
 188     if ( !wxControl::Enable( enable ) )
 189         return FALSE;
 190
 191     gtk_widget_set_sensitive( GTK_BUTTON(m_widget)->child, enable );
 192
 193     return TRUE;
 194 }
 195
 196 void wxRadioButton::ApplyWidgetStyle()
 197 {
 198     SetWidgetStyle();
 199     gtk_widget_set_style( m_widget, m_widgetStyle );
 200     gtk_widget_set_style( GTK_BUTTON(m_widget)->child, m_widgetStyle );
 201 }
 202
 203 bool wxRadioButton::IsOwnGtkWindow( GdkWindow *window )
 204 {
 205     return (window == GTK_TOGGLE_BUTTON(m_widget)->event_window);
 206 }
 207
 208 void wxRadioButton::OnInternalIdle()
 209 {
 210     wxCursor cursor = m_cursor;
 211     if (g_globalCursor.Ok()) cursor = g_globalCursor;
 212
 213     if (GTK_TOGGLE_BUTTON(m_widget)->event_window && cursor.Ok())
 214     {
 215         /* I now set the cursor the anew in every OnInternalIdle call
 216        as setting the cursor in a parent window also effects the
 217        windows above so that checking for the current cursor is
 218        not possible. */
 219
 220        gdk_window_set_cursor( GTK_TOGGLE_BUTTON(m_widget)->event_window, cursor.GetCursor() );
 221     }
 222
 223     UpdateWindowUI();
 224 }
 225
 226 wxSize wxRadioButton::DoGetBestSize() const
 227 {
 228     return wxControl::DoGetBestSize();
 229 }
 230
 231 #endif