button.cpp

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/*
 * button.cpp
 *
 * Copyright (C) 2008-2009  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 button dialog element.
 */

// includes --------------------------------------------------------------------
#include "element.h"            // always include our own header first

#include "dialog.h"

#include "datahash/datahash_util.h"


namespace dialog {


////////////////////////////////////////////////////////////////////////////////
//
//      Button -- class that implements Element for button elements
//
////////////////////////////////////////////////////////////////////////////////

class Button : public Element {
public:
        ~Button(void) throw() { }

        // public class methods ------------------------------------------------
        void initialize(IN const Datahash * hash,
                                IN smart_ptr<Drawer>& drawer);

        // dialog::Element class interface methods -----------------------------
        int getWidth(void) { return m_width; }
        int getHeight(void) { return m_height; }
        void draw(IN const point_t& offset);
        void cursor(IN const point_t& pos) { }
        const char * button(IN int button, IN int state,
                        IN const point_t& pos);

private:
        // private helper methods ----------------------------------------------

        // private member data -------------------------------------------------
        smart_ptr<Drawer>       m_drawer;
        std::string             m_label;
        std::string             m_submit;
        int                     m_width;
        int                     m_height;
        int                     m_rise;
        int                     m_border;
};



void
Button::initialize
(
IN const Datahash * hash,
IN smart_ptr<Drawer>& drawer
)
{
        ASSERT(hash, "null");
        ASSERT(drawer, "null");

        m_drawer = drawer;
        m_label = getString(hash, "label");
        m_submit = getString(hash, "submit");

        font_size_t fs =
            m_drawer->getFontSizing(eElement_Button, m_label.c_str());

        m_width = fs.lead + fs.trail + 1;
        m_height = fs.drop + fs.rise + 1;
        m_rise = fs.rise;

//      DPRINTF("BUTTON '%s'", m_label.c_str());
//      DPRINTF("  width:%d  lead:%d  trail:%d", m_width, fs.lead, fs.trail);
//      DPRINTF("  height:%d  rise:%d  drop:%d", m_height, fs.rise, fs.drop);

        // account for border
        border_size_t bs = m_drawer->getBorderSizing(eElement_Button);
        m_border = bs.size;
        m_width += 2 * m_border;
        m_height += 2 * m_border;
}



void
Button::draw
(
IN const point_t& offset
)
{
        ASSERT(m_drawer, "null");

        // given offest, determine rect
        rect_t r(offset.x, offset.y, offset.x + m_width, offset.y + m_height);

        // draw background etc
        m_drawer->drawRectWithBorder(eElement_Button, r);

        // draw text
        point_t pos(offset.x + m_border, offset.y + m_border + m_rise);
        m_drawer->drawString(eElement_Button, pos, m_label.c_str());
}



const char *
Button::button
(
IN int button,
IN int state,
IN const point_t& pos
)
{
//      DPRINTF("Button '%s' received button %d state %d",
//          m_label.c_str(), button, state);

        return m_submit.c_str();
}



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

smart_ptr<Element>
createButtonElement
(
IN Manager * mgr,
IN const Datahash * hash
)
{
        ASSERT(mgr, "null");
        ASSERT(hash, "null");

        smart_ptr<Button> local = new Button;
        ASSERT(local, "out of memory");

        smart_ptr<Drawer> drawer = mgr->getDrawer();
        local->initialize(hash, drawer);

        return local;
}



};      // dialog namespace