/**
 * @file   PaiJobParameterItemWidget.cpp
 * @brief  日志中参数设置界面
 *  @date: 2013-4-18
 * @author: cuizh
 */

#include "PaiJobParameterItemWidget.h"
#include <QHBoxLayout>
#include <QScrollBar>
#include <QDebug>
#include <QMouseEvent>
#include <QPushButton>
#include <QLabel>
#include <QPainter>

using namespace pai::gui;

const int PADDING = 10; //边界内空隙，主要用于判断鼠标点是否位于边界附近

PaiJobParameterItemWidget::PaiJobParameterItemWidget(QWidget *pParent) : QWidget(pParent)
{
    QPalette pal = palette();
    pal.setColor(QPalette::Background, QColor("#daf5fe"));
    setPalette(pal);

    setWindowFlags(Qt::FramelessWindowHint);
    setWindowModality(Qt::ApplicationModal);
    this->resize(400,210);

    SetWidgetLayout();
    m_EnterFlag = false;
    m_fixed = false;
    m_press = false;

    m_direction = NONE;
    this->setMouseTracking(true);
}

PaiJobParameterItemWidget::~PaiJobParameterItemWidget()
{
}

void PaiJobParameterItemWidget::SetWidgetLayout()
{
    QHBoxLayout *phLayout = new QHBoxLayout;
    m_pLable = new QLabel("Parameter",this);
    m_pBtn = new QPushButton(QIcon(":/log_Error_drawingup.png"),tr(""),this);
    m_pBtn->setStyleSheet("QPushButton{border: 0px solid red;border-radius:10px}");
    m_pBtn->resize(10,15);

    connect(m_pBtn,SIGNAL(clicked(bool)),this,SLOT(FixTheWidget(bool)));

    phLayout->addWidget(m_pLable);
    phLayout->addStretch(100);
    phLayout->addWidget(m_pBtn);

    m_pParamInfoTextEdit = new pai::gui::PaiParameTextEdit(this);
    QVBoxLayout *pMainLayout = new QVBoxLayout;
    pMainLayout->addLayout(phLayout);
    pMainLayout->addWidget(m_pParamInfoTextEdit);
    pMainLayout->setContentsMargins(5,4,5,5);

    this->setLayout(pMainLayout);
}

void PaiJobParameterItemWidget::FixTheWidget(bool /*fixed*/)
{
    if(!m_fixed)
    {
        m_fixed = true;
        m_pBtn->setIcon(QIcon(":/log_Error_drawingdown.png"));
    }
    else
    {
        m_fixed = false;
        m_pBtn->setIcon(QIcon(":/log_Error_drawingup.png"));
    }
}

void PaiJobParameterItemWidget::enterEvent ( QEvent *pEvent)
{
    QWidget::enterEvent(pEvent);
    m_EnterFlag = true;

}

void PaiJobParameterItemWidget::leaveEvent ( QEvent *pEvent)
{
    QWidget::leaveEvent(pEvent);
    m_EnterFlag = false;

}

void PaiJobParameterItemWidget::SetParamEditInfo(const QString& text)
{
	if(m_pParamInfoTextEdit)
	{
	    m_pParamInfoTextEdit->setHtml(text);
	}
}

bool PaiJobParameterItemWidget::GetMouseEnterWidgetFlag() const
{
    return m_EnterFlag;
}

bool PaiJobParameterItemWidget::GetFixWidgetPosFlag() const
{
    return m_fixed;
}

void PaiJobParameterItemWidget::mouseMoveEvent(QMouseEvent * pEvent)
{
    QPoint gloPoint = pEvent->globalPos();
    QRect WidgetShowRect = this->rect();
    QPoint tl = mapToGlobal(WidgetShowRect.topLeft());
    QPoint rb = mapToGlobal(WidgetShowRect.bottomRight());

    //鼠标没有按下情况
    if(!m_press)
    {
        this->SetRegionCursorShape(gloPoint);
    }
    else //鼠标按下情况
    {
        if(m_direction != NONE)
        {
            QRect rMove(tl, rb);

            switch(m_direction)
            {
            case RIGHT: //向右
                rMove.setWidth(gloPoint.x() - tl.x());
                break;
            case DOWN:  //向下
                rMove.setHeight(gloPoint.y() - tl.y());
                break;
            case RIGHTBOTTOM: //右下
                rMove.setWidth(gloPoint.x() - tl.x());
                rMove.setHeight(gloPoint.y() - tl.y());
                break;
            default:

                break;
            }
            this->setGeometry(rMove);
        }
        else
        {
            pEvent->accept();
        }
    }
    QWidget::mouseMoveEvent(pEvent);

}

void PaiJobParameterItemWidget::mousePressEvent(QMouseEvent * pEvent)
{
    switch(pEvent->button())
    {
        case Qt::LeftButton:
            m_press = true;
            if(m_direction != NONE)
            {
                this->mouseGrabber();
            } else
            {
                m_DragPosition = pEvent->globalPos() - this->frameGeometry().topLeft();
            }
            break;
        case Qt::RightButton:
            break;
        default:
            QWidget::mousePressEvent(pEvent);
    }

}

void PaiJobParameterItemWidget::mouseReleaseEvent(QMouseEvent * pEvent)
{
    if(pEvent->button() == Qt::LeftButton)
    {
         m_press = false;
         if(m_direction != NONE)
         {
             this->releaseMouse();
             this->setCursor(QCursor(Qt::ArrowCursor));
         }
    }
    else
    {
        QWidget::mouseReleaseEvent(pEvent);
    }
}

void PaiJobParameterItemWidget::paintEvent(QPaintEvent *pEvent)
{
    QPainter paint(this);
    QPen pen;
    pen.setWidth(1);
    pen.setColor(QColor("#68bee6"));
    paint.setPen(pen);
    paint.drawLine(5,25,this->width() - 5,25);

    paint.drawRect(1,1,this->width()-2.5,this->height()-2.5);
    QWidget::paintEvent(pEvent);
}


void PaiJobParameterItemWidget::SetRegionCursorShape(const QPoint &cursorGlobalPoint)
{
    QRect rect = this->rect();
    QPoint rb = mapToGlobal(rect.bottomRight());
    int x = cursorGlobalPoint.x();
    int y = cursorGlobalPoint.y();

    //设置光标显示形状
    if(x >= rb.x() - PADDING && x <= rb.x() && y >= rb.y() - PADDING && y <= rb.y())
    {
        m_direction = RIGHTBOTTOM; //右下
        this->setCursor(QCursor(Qt::SizeFDiagCursor));
    }
    else if( x <= rb.x() && x >= rb.x() - PADDING)
    {
        m_direction = RIGHT;  //向右
        this->setCursor(QCursor(Qt::SizeHorCursor));
    }
    else if(y <= rb.y() && y >= rb.y() - PADDING)
    {
        m_direction = DOWN;  //向下
        this->setCursor(QCursor(Qt::SizeVerCursor));
    }
    else
    {
        m_direction = NONE;  //默认
        this->setCursor(QCursor(Qt::ArrowCursor));
    }
}


////////////////////////////class PaiParameTextEdit////////////////////////////////////

PaiParameTextEdit::PaiParameTextEdit(QWidget* parent ) : QTextEdit(parent)
{
    this->setMouseTracking(true);
    this->verticalScrollBar()->setMouseTracking(true);
    this->verticalScrollBar()->installEventFilter(this);
}
PaiParameTextEdit::~PaiParameTextEdit()
{
}

bool PaiParameTextEdit::eventFilter(QObject *pObj, QEvent *pEvent)
{
    QScrollBar* qQScrollBar = qobject_cast<QScrollBar*> (pObj);
    if(qQScrollBar)
    {
        if(pEvent->type() == QEvent::MouseMove)
        {
            qQScrollBar->setCursor(QCursor(Qt::ArrowCursor)); //设置默认图标
        }
    }
    return false;
}