#include "ScaleThreePainter.h"

#include <QtGui>

namespace GVA {

ScaleThreePainter::ScaleThreePainter(

      const QString &leftFilename,

      const QString &middleFilename,

      const QString &rightFilename)

        : m_leftFilename(leftFilename),

          m_middleFilename(middleFilename),

          m_rightFilename(rightFilename),

          m_leftPixmap(0),

          m_middlePixmap(0),

          m_rightPixmap(0),

          m_pixmapsLoaded(false)

{

}

ScaleThreePainter::~ScaleThreePainter() {

    unloadPixmaps();

}

void ScaleThreePainter::loadPixmaps() {

    Q_ASSERT(!m_pixmapsLoaded);

    m_leftPixmap = new QPixmap(m_leftFilename);

    m_middlePixmap = new QPixmap(m_middleFilename);

    m_rightPixmap = new QPixmap(m_rightFilename);

    m_pixmapsLoaded = true;

}

void ScaleThreePainter::unloadPixmaps() {

    delete m_leftPixmap; m_leftPixmap = 0;

    delete m_middlePixmap; m_middlePixmap = 0;

    delete m_rightPixmap; m_rightPixmap = 0;

    m_pixmapsLoaded = false;

}

void ScaleThreePainter::paint(QPainter* painter, const QRect &rect, QWidget* widget) {

    Q_UNUSED(widget)

    if(!m_pixmapsLoaded)

        loadPixmaps();

    //    qDebug() << "ScaleThreePainter::paint: " << rect << qMin(m_middlePixmap->height(), rect.height());

    painter->save();

    // Draw left.

    if(m_leftPixmap->height() > rect.height())

        painter->drawPixmap(0, 0, m_leftPixmap->width(), rect.height(), *m_leftPixmap);

    else

        painter->drawPixmap(0, 0, *m_leftPixmap);

    // Draw top middle -- fills in the space is between the left and right pixmaps.

    if(!m_middlePixmap->isNull()) {

        painter->drawTiledPixmap(m_leftPixmap->width(),

                                 0,

                                 rect.width() - (m_leftPixmap->width() + m_rightPixmap->width()),

                                 rect.height(),

                                 m_middlePixmap->scaledToHeight(rect.height()));

    }

    // Draw right.

    if(m_rightPixmap->height() > rect.height())

        painter->drawPixmap(rect.right() - m_rightPixmap->width() + 1, 0, m_rightPixmap->width(), rect.height(), *m_rightPixmap);

    else

        painter->drawPixmap(rect.right() - m_rightPixmap->width() + 1, 0, *m_rightPixmap);

    painter->restore();

}

}  // GVA namespace