wxWidgets/src/gtk/radiobut.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        radiobut.cpp
// Purpose:
// Author:      Robert Roebling
// Id:          $Id$
// Copyright:   (c) 1998 Robert Roebling
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"

#if wxUSE_RADIOBOX

#include "wx/radiobut.h"

#include "wx/gtk/private.h"

//-----------------------------------------------------------------------------
// data
//-----------------------------------------------------------------------------

extern bool           g_blockEventsOnDrag;

//-----------------------------------------------------------------------------
// "clicked"
//-----------------------------------------------------------------------------

extern "C" {
static
void gtk_radiobutton_clicked_callback( GtkToggleButton *button, wxRadioButton *rb )
{
    if (g_isIdle) wxapp_install_idle_handler();

    if (!rb->m_hasVMT) return;

    if (g_blockEventsOnDrag) return;

    if (!button->active) return;

    if (rb->m_blockEvent) return;

    wxCommandEvent event( wxEVT_COMMAND_RADIOBUTTON_SELECTED, rb->GetId());
    event.SetInt( rb->GetValue() );
    event.SetEventObject( rb );
    rb->GetEventHandler()->ProcessEvent( event );
}
}

//-----------------------------------------------------------------------------
// wxRadioButton
//-----------------------------------------------------------------------------

IMPLEMENT_DYNAMIC_CLASS(wxRadioButton,wxControl)

bool wxRadioButton::Create( wxWindow *parent,
                            wxWindowID id,
                            const wxString& label,
                            const wxPoint& pos,
                            const wxSize& size,
                            long style,
                            const wxValidator& validator,
                            const wxString& name )
{
    m_needParent = TRUE;

    m_blockEvent = FALSE;

    if (!PreCreation( parent, pos, size ) ||
        !CreateBase( parent, id, pos, size, style, validator, name ))
    {
        wxFAIL_MSG( wxT("wxRadioButton creation failed") );
        return FALSE;
    }

    GSList* radioButtonGroup = NULL;
    if (!HasFlag(wxRB_GROUP))
    {
        // search backward for last group start
        wxRadioButton *chief = (wxRadioButton*) NULL;
        wxWindowList::compatibility_iterator node = parent->GetChildren().GetLast();
        while (node)
        {
            wxWindow *child = node->GetData();
            if (child->IsRadioButton())
            {
                chief = (wxRadioButton*) child;
                if (child->HasFlag(wxRB_GROUP))
                    break;
            }
            node = node->GetPrevious();
        }
        if (chief)
        {
            // we are part of the group started by chief
            radioButtonGroup = gtk_radio_button_get_group( GTK_RADIO_BUTTON(chief->m_widget) );
        }
    }

    m_widget = gtk_radio_button_new_with_label( radioButtonGroup, wxGTK_CONV( label ) );

    SetLabel(label);

    g_signal_connect (m_widget, "clicked",
                      G_CALLBACK (gtk_radiobutton_clicked_callback), this);

    m_parent->DoAddChild( this );

    PostCreation(size);

    return TRUE;
}

void wxRadioButton::SetLabel( const wxString& label )
{
    wxCHECK_RET( m_widget != NULL, wxT("invalid radiobutton") );

    GTKSetLabelForLabel(GTK_LABEL(GTK_BIN(m_widget)->child), label);
}

void wxRadioButton::SetValue( bool val )
{
    wxCHECK_RET( m_widget != NULL, wxT("invalid radiobutton") );

    if (val == GetValue())
        return;

    m_blockEvent = TRUE;

    if (val)
    {
        gtk_toggle_button_set_active( GTK_TOGGLE_BUTTON(m_widget), TRUE );
    }
    else
    {
        // should give an assert
        // RL - No it shouldn't.  A wxGenericValidator might try to set it
        //      as FALSE.  Failing silently is probably TRTTD here.
    }

    m_blockEvent = FALSE;
}

bool wxRadioButton::GetValue() const
{
    wxCHECK_MSG( m_widget != NULL, FALSE, wxT("invalid radiobutton") );

    return GTK_TOGGLE_BUTTON(m_widget)->active;
}

bool wxRadioButton::Enable( bool enable )
{
    if ( !wxControl::Enable( enable ) )
        return FALSE;

    gtk_widget_set_sensitive(GTK_BIN(m_widget)->child, enable);

    return TRUE;
}

void wxRadioButton::DoApplyWidgetStyle(GtkRcStyle *style)
{
    gtk_widget_modify_style(m_widget, style);
    gtk_widget_modify_style(GTK_BIN(m_widget)->child, style);
}

GdkWindow *
wxRadioButton::GTKGetWindow(wxArrayGdkWindows& WXUNUSED(windows)) const
{
    return GTK_BUTTON(m_widget)->event_window;
}

wxSize wxRadioButton::DoGetBestSize() const
{
    return wxControl::DoGetBestSize();
}

// static
wxVisualAttributes
wxRadioButton::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
{
    wxVisualAttributes attr;
    // NB: we need toplevel window so that GTK+ can find the right style
    GtkWidget *wnd = gtk_window_new(GTK_WINDOW_TOPLEVEL);
    GtkWidget* widget = gtk_radio_button_new_with_label(NULL, "");
    gtk_container_add(GTK_CONTAINER(wnd), widget);
    attr = GetDefaultAttributesFromGTKWidget(widget);
    gtk_widget_destroy(wnd);
    return attr;
}


#endif