#include "panelbutton.h"

#include <QtCore/QDebug>

#include <QtGui/QMenu>
#include <QtGui/QPainter>

PanelButton::PanelButton(QWidget *parent)
        : QPushButton(parent)
{
    _buttonAlignment = Qt::AlignCenter;
}

QSize PanelButton::minimumSizeHint() const
{
    QRect rect = fontMetrics().boundingRect(text());
    QSize size(rect.width() + 8, rect.height() + 8);

    if(size.width() < minimumWidth())
    {
        size.setWidth(minimumWidth());
    }
    if(size.height() < minimumHeight())
    {
        size.setHeight(minimumHeight());
    }
    return size;
}

void PanelButton::setButtonAlignment(int buttonAlignment)
{
    _buttonAlignment = buttonAlignment;
}

int PanelButton::buttonAlignment() const
{
    return _buttonAlignment;
}

void PanelButton::paintEvent(QPaintEvent *event)
{
    Q_UNUSED(event);

    QRect textRect = fontMetrics().boundingRect(text());
    QRectF backgroundRect = rect();
    QRectF borderRect = rect();
    QPoint textPoint;
    QPoint iconPoint;
    QPixmap pixmap = icon().pixmap(16);

    QPainter p(this);

    QGradientStops stops;
    QLinearGradient backgroundGradient(QPointF(0, backgroundRect.top()), QPointF(0, backgroundRect.bottom()));
    stops.append(QGradientStop(0.00f, QColor(0xf3, 0xf3, 0xf3, 0xff)));
    stops.append(QGradientStop(0.50f, QColor(0xeb, 0xeb, 0xeb, 0xff)));
    stops.append(QGradientStop(0.51f, QColor(0xdd, 0xdd, 0xdd, 0xff)));
    stops.append(QGradientStop(1.00f, QColor(0xcd, 0xcd, 0xcd, 0xff)));
    backgroundGradient.setStops(stops);

    QPen borderPen;
    borderPen.setWidth(1);
    borderPen.setColor(QColor(0x70, 0x70, 0x70, 0xff));
    QPen backgroundPen;
    backgroundPen.setWidth(1);
    backgroundPen.setColor(QColor(0xff, 0xff, 0xff, 0xef));

    textPoint.setX(backgroundRect.width() / 2 - textRect.width() / 2);
    textPoint.setY(backgroundRect.height() / 2 - textRect.height() / 2);
    textPoint.setY(fontMetrics().ascent() + textPoint.y());

    iconPoint.setX(textPoint.x() - pixmap.width() - 6);
    iconPoint.setY(backgroundRect.height() / 2 - pixmap.height() / 2);

    borderRect.setLeft(borderRect.left() + 0.5f);
    borderRect.setRight(borderRect.right() - 0.5f);
    borderRect.setTop(borderRect.top() + 0.5f);
    borderRect.setBottom(borderRect.bottom() - 0.5f);

    backgroundRect.setLeft(backgroundRect.left() + 1.5f);
    backgroundRect.setRight(backgroundRect.right() - 1.5f);
    backgroundRect.setTop(backgroundRect.top() + 1.5f);
    backgroundRect.setBottom(backgroundRect.bottom() - 1.5f);

    p.setPen(Qt::NoPen);
    p.setBrush(QBrush(backgroundGradient));
    p.drawRect(backgroundRect);

    if(underMouse() && isDown())
    {
        p.setBrush(QColor(0x00, 0x00, 0x00, 0x3F));
        p.drawRect(backgroundRect);
    }
    else if(underMouse())
    {
        p.setBrush(QColor(0x00, 0x00, 0x00, 0x1F));
        p.drawRect(backgroundRect);
    }

    p.setPen(backgroundPen);
    p.setBrush(Qt::NoBrush);
    p.drawRect(backgroundRect);

    p.setPen(borderPen);
    p.setBrush(Qt::NoBrush);
    p.drawRect(borderRect);

    if(isDown())
    {
        textPoint.rx() += 1;
        textPoint.ry() += 1;

        iconPoint.rx() += 1;
        iconPoint.ry() += 1;
    }

    p.setPen(palette().color(QPalette::Text));
    p.drawText(textPoint, text());

    p.drawPixmap(iconPoint, pixmap);
}