/**
 * @file PaiListItemDelegate.cpp
 * @date 2014-11-25
 */
#include <QPainter>
#include <QBrush>
#include <QLinearGradient>
#include <QApplication>

#include "PaiListItemDelegate.h"

using namespace pai::gui;

PaiListItemDelegate::PaiListItemDelegate(QObject *pParent) :
    QStyledItemDelegate(pParent),
    m_GridPen(QColor("#C9D5DC"), 0, Qt::SolidLine)
{

}

void PaiListItemDelegate::paint(QPainter *pPainter, const QStyleOptionViewItem & option, const QModelIndex & index) const
{
    QStyleOptionViewItemV4 opt = option;
    initStyleOption(&opt, index);
    bool bSelected = opt.state & QStyle::State_Selected;
    QPointF startPoint(0, 0);
    QPointF finalPoint(0, opt.rect.height());
    QLinearGradient linearGrad(startPoint, finalPoint);

    if(bSelected)
    {
        opt.state = opt.state & ~QStyle::State_Selected;
        linearGrad.setColorAt(0, QColor("#F6FDFF"));
        linearGrad.setColorAt(1, QColor("#DAF3FD"));
        opt.backgroundBrush = QBrush(linearGrad);
    }
    else
    {
        opt.backgroundBrush = QBrush(Qt::white);
    }

    const QWidget *pWidget = opt.widget;
    QStyle *pStyle = pWidget ? pWidget->style() : QApplication::style();

    pStyle->drawControl(QStyle::CE_ItemViewItem, &opt, pPainter, pWidget);

    QPen oldPen(pPainter->pen());
    pPainter->setPen(m_GridPen);

    // paint horizontal lines
    pPainter->drawLine(option.rect.bottomLeft(), option.rect.bottomRight());

    pPainter->setPen(oldPen);
}