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