#include "ximagebutton.h"
#include <QtDebug>
XImageButton::XImageButton(QPixmap pixmap, QWidget *parent):QWidget(parent)
{
    initVariable(pixmap);
    initUI();
}
void XImageButton::initVariable(QPixmap pixmap)
{
    m_pixmap = pixmap;
    m_pButton = new QPushButton(this);
    m_pLayout = new QVBoxLayout();
    m_pButton->installEventFilter(this);
    connect(m_pButton,SIGNAL(clicked()),this,SLOT(onButtonClick()));
}
void XImageButton::initUI()
{
    m_pButton->setStyleSheet("background:transparent;border:0px;");
    m_pButton->setContentsMargins(0,0,0,0);

    m_pLayout->setContentsMargins(0,0,0,0);
    m_pLayout->addWidget(m_pButton);

    setButtonIcon(XButtonDefault);
    this->setLayout(m_pLayout);
}

void XImageButton::changeImage(QPixmap pixmap)
{
    m_pixmap = pixmap;
}

XImageButton::~XImageButton()
{
    delete m_pButton;
    delete m_pLayout;
}
bool XImageButton::eventFilter(QObject *target, QEvent *event)
{
    XButtonState state = XButtonNone;
    if (target == m_pButton)
    {

        if (event->type() == QEvent::Enter)
        {

            state = XButtonEnter;
        }
        else if (event->type() == QEvent::Leave)
        {
            state = XButtonDefault;
        }
        else if (((QMouseEvent *)event)->button() == Qt::LeftButton)
        {
            if (event->type() == QEvent::MouseButtonPress)
            {
                state = XButtonPress;

            }
            if (event->type() == QEvent::MouseButtonRelease)
            {
                state = XButtonEnter;
            }
        }
        if(m_pButton->isEnabled())
        {
            if (state != XButtonNone)
            {
                setButtonIcon(state);
            }
        }

    }
    return QWidget::eventFilter(target, event);
}


void XImageButton::setEnabled(bool enable)
{
    m_pButton->setEnabled(enable);
}
void XImageButton::setButtonIcon(XButtonState state)
{
    setCursor(Qt::ArrowCursor);
    int nWidth = m_pixmap.width()/4;
    int nHeight = m_pixmap.height();
    m_pButton->setIcon(QIcon(m_pixmap.copy(QRect(state * nWidth, 0, nWidth, nHeight))));
    m_pButton->setIconSize(QSize(nWidth, nHeight));
}


void XImageButton::onButtonClick()
{
   emit clicked();
}