source/presentation/InfoPanel.cpp

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#include "InfoPanel.h"

InfoPanel::InfoPanel(ALLEGRO_BITMAP* back, ALLEGRO_BITMAP* front, int x, int y, int width, int height)
    :ScreenPanel(back, front, x, y, width, height),
    _petrolHeadingY(_width/10),
    _petrolGuageY(_petrolHeadingY + _width/10),
    _petrolGuageHeight(_width/10),
    _checkpointHeadingY(_petrolGuageY + _petrolGuageHeight + _width/10),
    _checkpointValueY(_checkpointHeadingY + _width/10),
    _miniMazeY(_checkpointValueY + _width/5),
    _miniMazeHeight(_height - _miniMazeY),
    _miniMazeblockWidth(0)
{
    _panelFont = al_load_font("junction 02.ttf", _width/10, 0);
    if (_panelFont == NULL)
    {
        al_show_native_message_box(NULL, "Fatal error", "Fatal error", "The file 'junction 02.ttf' was not found. Ensure that it is located in the working directory.", NULL, ALLEGRO_MESSAGEBOX_ERROR);
        throw InstallFailure();
    }
}

InfoPanel::~InfoPanel()
{
    al_destroy_font(_panelFont);
}

void InfoPanel::draw(const Maze& maze, const list<PlayerCar>& players, const list<EnemyCar>& enemies, const list<Checkpoint>& checkpoints, const list<Rock>& rocks, const list<Smokescreen>& smokescreens, const list<DestroyedObjectPopup>& popups)
{
    ALLEGRO_BITMAP* prev_draw = al_get_target_bitmap();
    al_set_target_bitmap(_back);

    double petrol = 0;
    if (!players.empty())
    {
        petrol = players.front().petrol();
    }

    al_clear_to_color(_colourStore.getColour(BitmapStore::MAZE_FLOOR));

    //gets a mazeblock width the fits the current maze
    _miniMazeblockWidth = min(static_cast<float>(_width)/maze.width(), static_cast<float>(_miniMazeHeight)/maze.height());

    //draws petrol heading and bar
    al_draw_text(_panelFont, al_map_rgb(255,255,255), 1, _petrolHeadingY, ALLEGRO_ALIGN_LEFT , "Petrol");
    al_draw_filled_rectangle(0,_petrolGuageY,_width*petrol, _petrolGuageY+_petrolGuageHeight, al_map_rgb(255,128,0));

    //draws checkpoints remaining heading and value
    al_draw_text(_panelFont, al_map_rgb(255,255,255), 1, _checkpointHeadingY, ALLEGRO_ALIGN_LEFT , "Checkpoints");
    stringstream checkpointCountString;
    checkpointCountString << Checkpoint::checkpointCount();
    al_draw_text(_panelFont, al_map_rgb(255,255,255), 1, _checkpointValueY, ALLEGRO_ALIGN_LEFT , checkpointCountString.str().c_str());

    draw(maze);
    for (list<PlayerCar>::const_iterator iter = players.begin(); iter != players.end(); ++iter)
    {
        draw(*iter);
    }
    for (list<EnemyCar>::const_iterator iter = enemies.begin(); iter != enemies.end(); ++iter)
    {
        draw(*iter);
    }
    for (list<Checkpoint>::const_iterator iter = checkpoints.begin(); iter != checkpoints.end(); ++iter)
    {
        draw(*iter);
    }

    //restore draw target
    al_set_target_bitmap(prev_draw);
}

void InfoPanel::draw(const Maze& maze)
{
    ALLEGRO_COLOR wallColour = _colourStore.getColour(BitmapStore::MAZE_WALL);
    ALLEGRO_COLOR floorColour = _colourStore.getColour(BitmapStore::MAZE_FLOOR);

    for (int x=0; x<maze.width(); ++x)
    {
        for (int y=0; y<maze.height(); ++y)
        {
            float x1 = getPanelX(x);
            float x2 = x1 + _miniMazeblockWidth;
            float y1 = getPanelY(y) + _miniMazeY;
            float y2 = y1 + _miniMazeblockWidth;
            if (maze.getSolid(x,y))
            {
                al_draw_filled_rectangle(x1, y1, x2, y2, wallColour);
            }
            else
            {
                al_draw_filled_rectangle(x1, y1, x2, y2, floorColour);
            }
        }
    }
}

void InfoPanel::draw(const GameObject& object)
{
    float r = _miniMazeblockWidth/2;
    float cx = getPanelX(object.x()) + r;
    float cy = getPanelY(object.y()) + _miniMazeY + r;
    al_draw_filled_circle(cx, cy, r, _colourStore.getColour(object.image()));
}

float InfoPanel::getPanelX(const double& x) const
{
    return static_cast<float>(x*_miniMazeblockWidth);
}
float InfoPanel::getPanelY(const double& y) const
{
    return static_cast<float>(y*_miniMazeblockWidth);
}