Field.cpp

/*
 * Copyright (C) 2012 Southern Storm Software, Pty Ltd.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */

#include "Field.h"

Field::Field(const String &label)
    : _label(label)
    , _form(0)
    , next(0)
    , prev(0)
{
}

Field::Field(Form &form, const String &label)
    : _label(label)
    , _form(0)
    , next(0)
    , prev(0)
{
    form.addField(this);
}

Field::~Field()
{
    if (_form)
        _form->removeField(this);
}

int Field::dispatch(int event)
{
    // Nothing to do here.
    return -1;
}

void Field::enterField(bool reverse)
{
    lcd()->print(_label);
}

void Field::exitField()
{
    // Nothing to do here.
}

void Field::setLabel(const String &label)
{
    if (isCurrent()) {
        unsigned int prevLen = _label.length();
        unsigned int newLen = label.length();
        _label = label;
        lcd()->setCursor(0, 0);
        lcd()->print(label);
        while (newLen++ < prevLen)
            lcd()->write(' ');
        updateCursor();
    } else {
        _label = label;
    }
}

bool Field::isCurrent() const
{
    if (!_form->isVisible())
        return false;
    return _form->currentField() == this;
}

void Field::updateCursor()
{
    // Nothing to do here.
}