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6396f9a204
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@2221 a592a061-630c-0410-9148-cb99ea01b6c8
106 lines
2.4 KiB
C
106 lines
2.4 KiB
C
/* This file is part of
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* =================================================
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*
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* LyX, The Document Processor
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* Copyright 1995 Matthias Ettrich.
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* Copyright 1995-2001 The LyX Team.
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*
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* This file Copyright 2000 Baruch Even
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* ================================================= */
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#include <config.h>
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#include <functional>
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#include <algorithm>
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#include <iterator>
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#ifdef __GNUG__
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#pragma implementation
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#endif
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#include "RadioButtonGroup.h"
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#include "debug.h" // for lyxerr
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using std::find_if;
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using std::bind2nd;
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using std::endl;
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void RadioButtonGroup::registerRadioButton(FL_OBJECT *button, int value)
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{
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map.push_back( ButtonValuePair(button, value) );
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}
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void RadioButtonGroup::reset()
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{
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map.clear();
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}
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// Functor to help us in our work, we should try to find how to achieve
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// this with only STL predicates, but its easier to write this than to
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// dig. If you can find the equivalent STL predicate combination, let me
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// know.
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//
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// The idea is to take a pair and a value and return true when the second
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// element in the pair equals the value.
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template < typename T >
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struct equal_to_second_in_pair
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{
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typedef bool result_type;
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typedef T first_argument_type;
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typedef typename T::second_type second_argument_type;
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bool operator() (
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pair < typename T::first_type, typename T::second_type > const & left,
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typename T::second_type const & right) const
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{
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return left.second == right;
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}
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};
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void RadioButtonGroup::setButton(int value)
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{
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ButtonValueMap::const_iterator it =
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find_if(map.begin(), map.end(),
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bind2nd(equal_to_second_in_pair < ButtonValuePair > (),
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value));
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// If we found nothing, report it and return
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if (it == map.end()) {
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lyxerr << "BUG: Requested value in RadioButtonGroup doesn't exists"
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<< endl;
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}
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else {
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fl_set_button(it->first, 1);
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}
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}
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template < typename T >
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struct is_set_button {
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bool operator() (T const & item) const
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{
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return fl_get_button( (item).first );
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}
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};
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int RadioButtonGroup::getButton()
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{
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// Find the first button that is active
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ButtonValueMap::iterator it =
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find_if(map.begin(), map.end(),
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is_set_button < ButtonValuePair > () );
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// If such a button was found, return its value.
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if (it != map.end()) {
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return it->second;
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}
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lyxerr << "BUG: No radio button found to be active." << endl;
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// Else return 0.
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return 0;
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}
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