GamePlay/gameplay/src/RadioButton.cpp

#include "Base.h"
#include "RadioButton.h"

namespace gameplay
{
static std::vector<RadioButton*> __radioButtons;

RadioButton::RadioButton() : _selected(false), _image(NULL)
{
}

RadioButton::~RadioButton()
{
    // Remove this RadioButton from the global list.
    std::vector<RadioButton*>::iterator it = std::find(__radioButtons.begin(), __radioButtons.end(), this);
    if (it != __radioButtons.end())
    {
        __radioButtons.erase(it);
    }
}

RadioButton* RadioButton::create(const char* id, Theme::Style* style)
{
    GP_ASSERT(style);

    RadioButton* radioButton = new RadioButton();
    if (id)
        radioButton->_id = id;
    radioButton->setStyle(style);

    __radioButtons.push_back(radioButton);

    return radioButton;
}

Control* RadioButton::create(Theme::Style* style, Properties* properties)
{
    GP_ASSERT(properties);

    RadioButton* radioButton = new RadioButton();
    radioButton->initialize(style, properties);

    properties->getVector2("imageSize", &radioButton->_imageSize);

    if (properties->getBool("selected"))
    {
        RadioButton::clearSelected(radioButton->_groupId);
        radioButton->_selected = true;
    }

    const char* groupId = properties->getString("group");
    if (groupId)
    {
        radioButton->_groupId = groupId;
    }

    __radioButtons.push_back(radioButton);

    return radioButton;
}

bool RadioButton::isSelected() const
{
    return _selected;
}

void RadioButton::setSelected(bool selected)
{
    if (selected)
        RadioButton::clearSelected(_groupId);

    if (selected != _selected)
    {
        _selected = selected;
        _dirty = true;
        notifyListeners(Control::Listener::VALUE_CHANGED);
    }
}

void RadioButton::setImageSize(float width, float height)
{
    _imageSize.set(width, height);
    _dirty = true;
}

const Vector2& RadioButton::getImageSize() const
{
    return _imageSize;
}

void RadioButton::addListener(Control::Listener* listener, int eventFlags)
{
    if ((eventFlags & Control::Listener::TEXT_CHANGED) == Control::Listener::TEXT_CHANGED)
    {
        GP_ERROR("TEXT_CHANGED event is not applicable to RadioButton.");
    }

    Control::addListener(listener, eventFlags);
}

void RadioButton::clearSelected(const std::string& groupId)
{
    std::vector<RadioButton*>::const_iterator it;
    for (it = __radioButtons.begin(); it < __radioButtons.end(); ++it)
    {
        RadioButton* radioButton = *it;
        GP_ASSERT(radioButton);
        if (groupId == radioButton->_groupId)
        {
            radioButton->_selected = false;
            radioButton->_dirty = true;
            radioButton->notifyListeners(Control::Listener::VALUE_CHANGED);
        }
    }
}

bool RadioButton::keyEvent(Keyboard::KeyEvent evt, int key)
{
    if (getState() == ACTIVE && evt == Keyboard::KEY_RELEASE && key == Keyboard::KEY_RETURN && !_selected)
    {
        RadioButton::clearSelected(_groupId);
        _selected = true;
        notifyListeners(Control::Listener::VALUE_CHANGED);
    }

    return Button::keyEvent(evt, key);
}

void RadioButton::controlEvent(Control::Listener::EventType evt)
{
    Button::controlEvent(evt);

    switch (evt)
    {
    case Control::Listener::CLICK:
        if (!_selected)
        {
            RadioButton::clearSelected(_groupId);
            _selected = true;
            notifyListeners(Control::Listener::VALUE_CHANGED);
        }
        break;
    }
}

void RadioButton::update(const Control* container, const Vector2& offset)
{
    Label::update(container, offset);

    Vector2 size;
    if (_imageSize.isZero())
    {
        if (_selected)
        {
            const Rectangle& selectedRegion = getImageRegion("selected", getState());
            size.set(selectedRegion.width, selectedRegion.height);
        }
        else
        {
            const Rectangle& unselectedRegion = getImageRegion("unselected", getState());
            size.set(unselectedRegion.width, unselectedRegion.height);
        }
    }
    else
    {
        size.set(_imageSize);
    }

    if (_autoWidth == Control::AUTO_SIZE_FIT)
    {
        // Text-only width was already measured in Label::update - append image
        setWidth(size.x + _bounds.width + 5);
    }

    if (_autoHeight == Control::AUTO_SIZE_FIT)
    {
        // Text-only width was already measured in Label::update - append image
        setHeight(std::max(getHeight(), size.y));
    }

    _textBounds.x += size.x + 5;
    
    if (_selected)
    {
        _image = getImage("selected", getState());
    }
    else
    {
        _image = getImage("unselected", getState());
    }
}

void RadioButton::drawImages(SpriteBatch* spriteBatch, const Rectangle& clip)
{
    GP_ASSERT(spriteBatch);
    GP_ASSERT(_image);

    // Left, v-center.
    // TODO: Set an alignment for radio button images.   
    const Rectangle& region = _image->getRegion();
    const Theme::UVs& uvs = _image->getUVs();
    Vector4 color = _image->getColor();
    color.w *= _opacity;

    Vector2 size;
    if (_imageSize.isZero())
    {
        size.set(region.width, region.height);
    }
    else
    {
        size.set(_imageSize);
    }

    Vector2 pos(_viewportBounds.x, _viewportBounds.y + _viewportBounds.height * 0.5f - size.y * 0.5f);

    spriteBatch->draw(pos.x, pos.y, size.x, size.y, uvs.u1, uvs.v1, uvs.u2, uvs.v2, color, _viewportClipBounds);
}

const char* RadioButton::getType() const
{
    return "radioButton";
}

void RadioButton::setGroupId(const char* groupId)
{
    _groupId = groupId;
}

const char* RadioButton::getGroupId() const
{
    return _groupId.c_str();
}

}