p_text.cpp

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/*
 * p_text.cpp
 *
 * Copyright (C) 2007  Thomas A. Vaughan
 * All rights reserved.
 *
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the <organization> nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THOMAS A. VAUGHAN ''AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THOMAS A. VAUGHAN BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *
 * Implementation of a text primitive.
 * (p_ stands for Primitive)
 */

// includes --------------------------------------------------------------------
#include "vgfx.h"             // all primitives should include this header first

#include "drawer.h"

#include "util/parsing.h"


namespace vgfx {

////////////////////////////////////////////////////////////////////////////////
//
//      static helper methods
//
////////////////////////////////////////////////////////////////////////////////

class Text : public Primitive {
public:
        ~Text(void) throw() { }

        // public class methods ------------------------------------------------
        void initialize(IN const init_text_t& init);

        // vgfx::Primitive class interface methods -----------------------------
        const char * getType(void) const throw() { return "text"; }
        void persist(IO std::ostream& stream) const;
        void recalcBoundingRect(IN const char * tag_path,
                                IN Drawer * drawer,
                                IN const xform_2d_t& T);
        bool getBoundingRect(OUT rect_t& r) const throw();
        void draw(IN Drawer * drawer,
                                IN const rect_t& r_cm,
                                IN const xform_2d_t& T);

private:
        std::string     m_text;
        rect_t          m_rect;         // bounding rect
};



////////////////////////////////////////////////////////////////////////////////
//
//      Text -- public class methods
//
////////////////////////////////////////////////////////////////////////////////

void
Text::initialize
(
IN const init_text_t& init
)
{
        this->setID(init.id.c_str());
        m_text = init.text;

//      DPRINTF("  New text primitive: '%s'", m_text.c_str());
}



////////////////////////////////////////////////////////////////////////////////
//
//      Text -- vgfx::Primitive class interface methods
//
////////////////////////////////////////////////////////////////////////////////

void
Text::draw
(
IN Drawer * drawer,
IN const rect_t& r_cm,
IN const xform_2d_t& T
)
{
        ASSERT(drawer, "null drawer");

        drawer->setTransform(T);
        drawer->drawText(m_rect, m_text.c_str());
}



void
Text::persist
(
OUT std::ostream& out
)
const
{
        out << "text id " << this->getID() << " text \"" << m_text << "\"";
}



void
Text::recalcBoundingRect
(
IN const char * tag_path,
IN Drawer * drawer,
IN const xform_2d_t& T
)
{
        ASSERT(drawer, "null drawer");

        // get bounding rect from drawer (it knows text details)
        drawer->setTransform(T);
        drawer->getBoundingRect(m_text.c_str(), m_rect);
        m_rect.expand(0.05);    // pen width etc
}



bool
Text::getBoundingRect
(
OUT rect_t& r
)
const throw()
{
        r = m_rect;
        return true;
}



////////////////////////////////////////////////////////////////////////////////
//
//      public API
//
////////////////////////////////////////////////////////////////////////////////

void
init_text_from_data
(
IN const dictionary_t& data,
OUT init_text_t& init
)
{
        init.id = getRequiredValue(data, "id");
        init.text = getRequiredValue(data, "text");
}



smart_ptr<Primitive>
create_text
(
IN const init_text_t& init
)
{
        smart_ptr<Text> local = new Text;
        ASSERT(local, "out of memory");

        local->initialize(init);

        return local;
}


};      // vgfx namespace