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     gtk_signal_connect( GTK_OBJECT(m_widget), "clicked",
 113       GTK_SIGNAL_FUNC(gtk_radiobutton_clicked_callback), (gpointer*)this );
 114
 115     m_parent->DoAddChild( this );
 116
 117     PostCreation();
 118
 119     SetFont( parent->GetFont() );
 120
 121     wxSize size_best( DoGetBestSize() );
 122     wxSize new_size( size );
 123     if (new_size.x == -1)
 124         new_size.x = size_best.x;
 125     if (new_size.y == -1)
 126         new_size.y = size_best.y;
 127     if ((new_size.x != size.x) || (new_size.y != size.y))
 128         SetSize( new_size.x, new_size.y );
 129
 130     SetBackgroundColour( parent->GetBackgroundColour() );
 131     SetForegroundColour( parent->GetForegroundColour() );
 132
 133     Show( TRUE );
 134
 135     return TRUE;
 136 }
 137
 138 void wxRadioButton::SetLabel( const wxString& label )
 139 {
 140     wxCHECK_RET( m_widget != NULL, wxT("invalid radiobutton") );
 141
 142     wxControl::SetLabel( label );
 143     GtkButton *bin = GTK_BUTTON( m_widget );
 144     GtkLabel *g_label = GTK_LABEL( bin->child );
 145     gtk_label_set( g_label, GetLabel().mbc_str() );
 146 }
 147
 148 void wxRadioButton::SetValue( bool val )
 149 {
 150     wxCHECK_RET( m_widget != NULL, wxT("invalid radiobutton") );
 151
 152     if (val == GetValue())
 153         return;
 154
 155     gtk_signal_disconnect_by_func( GTK_OBJECT(m_widget),
 156       GTK_SIGNAL_FUNC(gtk_radiobutton_clicked_callback), (gpointer*)this );
 157
 158     if (val)
 159     {
 160         gtk_toggle_button_set_state( GTK_TOGGLE_BUTTON(m_widget), TRUE );
 161     }
 162     else
 163     {
 164         // should give an assert
 165     }
 166
 167     gtk_signal_connect( GTK_OBJECT(m_widget), "clicked",
 168       GTK_SIGNAL_FUNC(gtk_radiobutton_clicked_callback), (gpointer*)this );
 169 }
 170
 171 bool wxRadioButton::GetValue() const
 172 {
 173     wxCHECK_MSG( m_widget != NULL, FALSE, wxT("invalid radiobutton") );
 174
 175     return GTK_TOGGLE_BUTTON(m_widget)->active;
 176 }
 177
 178 bool wxRadioButton::Enable( bool enable )
 179 {
 180     if ( !wxControl::Enable( enable ) )
 181         return FALSE;
 182
 183     gtk_widget_set_sensitive( GTK_BUTTON(m_widget)->child, enable );
 184
 185     return TRUE;
 186 }
 187
 188 void wxRadioButton::ApplyWidgetStyle()
 189 {
 190     SetWidgetStyle();
 191     gtk_widget_set_style( m_widget, m_widgetStyle );
 192     gtk_widget_set_style( GTK_BUTTON(m_widget)->child, m_widgetStyle );
 193 }
 194
 195 bool wxRadioButton::IsOwnGtkWindow( GdkWindow *window )
 196 {
 197     return (window == GTK_TOGGLE_BUTTON(m_widget)->event_window);
 198 }
 199
 200 void wxRadioButton::OnInternalIdle()
 201 {
 202     wxCursor cursor = m_cursor;
 203     if (g_globalCursor.Ok()) cursor = g_globalCursor;
 204
 205     if (GTK_TOGGLE_BUTTON(m_widget)->event_window && cursor.Ok())
 206     {
 207         /* I now set the cursor the anew in every OnInternalIdle call
 208            as setting the cursor in a parent window also effects the
 209            windows above so that checking for the current cursor is
 210            not possible. */
 211
 212            gdk_window_set_cursor( GTK_TOGGLE_BUTTON(m_widget)->event_window, cursor.GetCursor() );
 213     }
 214
 215     UpdateWindowUI();
 216 }
 217
 218 wxSize wxRadioButton::DoGetBestSize() const
 219 {
 220     return wxControl::DoGetBestSize();
 221 }
 222
 223 #endif