label.cpp

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/*
 * label.cpp
 *
 * Copyright (C) 2008  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-only dialog element (static label).
 */

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

#include "dialog.h"

#include "common/wave_ex.h"
#include "datahash/datahash_util.h"


namespace dialog {


////////////////////////////////////////////////////////////////////////////////
//
//      Label -- class that implements the Element interface for text elements
//
////////////////////////////////////////////////////////////////////////////////

class Label : public Element {
public:
        Label(void) throw();
        ~Label(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) { return NULL; }

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

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



Label::Label(void) throw()
{
}



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

        m_drawer = drawer;
        m_value = getString(hash, "value");

        const char * testString = m_value.c_str();
        if (!*testString) {
                // empty label?  Use "Mfg" (height, drop)
                testString = "Mfg";
        }
        font_size_t fs = m_drawer->getFontSizing(eElement_Label, testString);

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

//      DPRINTF("LABEL '%s'", m_value.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);
}



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

        // account for font drop
        point_t off2 = offset;
        off2.y += m_rise;

        m_drawer->drawString(eElement_Label, off2, m_value.c_str());
}



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

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

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

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

        return local;
}



};      // dialog namespace