#include "switchcontrol.h"
#include "qpainter.h"
#include <QPainterPath>
#include "qevent.h"
#include "qtimer.h"

SwitchControl::SwitchControl(QWidget *parent): QWidget(parent) {
    checked = false;
    buttonStyle	= ButtonStyle_Rect;

    bgColorOff = QColor(225, 225, 225);
    bgColorOn = QColor(250, 250, 250);

    sliderColorOff = QColor(100, 100, 100);
    sliderColorOn = QColor(100, 184, 255);

    textColorOff = QColor(255, 255, 255);
    textColorOn = QColor(10, 10, 10);

    textOff = "";
    textOn = "";

    imageOff = ":/image/btncheckoff1.png";
    imageOn = ":/image/btncheckon1.png";

    space = 2;
    rectRadius = 5;

    step = width() / 50;
    startX = 0;
    endX = 0;

    timer = new QTimer(this);
    timer->setInterval(5);
    connect(timer, SIGNAL(timeout()), this, SLOT(updateValue()));
}

void SwitchControl::mousePressEvent(QMouseEvent *) {
    checked = !checked;

    //每次移动的步长为宽度的 50分之一
    step = width() / 50;

    //状态切换改变后自动计算终点坐标
    if (checked) {
        if (buttonStyle == ButtonStyle_Rect) {
            endX = width() - width() / 2;
        } else if (buttonStyle == ButtonStyle_CircleIn) {
            endX = width() - height();
        } else if (buttonStyle == ButtonStyle_CircleOut) {
            endX = width() - height() + space;
        }
    } else {
        endX = 0;
    }

    timer->start();
    emit checkedChanged(checked);
}

void SwitchControl::resizeEvent(QResizeEvent *)
{
    //每次移动的步长为宽度的 50分之一
    step = width() / 50;

    //尺寸大小改变后自动设置起点坐标为终点
    if (checked) {
        if (buttonStyle == ButtonStyle_Rect) {
            startX = width() - width() / 2;
        } else if (buttonStyle == ButtonStyle_CircleIn) {
            startX = width() - height();
        } else if (buttonStyle == ButtonStyle_CircleOut) {
            startX = width() - height() + space;
        }
    } else {
        startX = 0;
    }

    update();
}

void SwitchControl::paintEvent(QPaintEvent *)
{
    //绘制准备工作,启用反锯齿
    QPainter painter(this);
    painter.setRenderHint(QPainter::Antialiasing);

    if (buttonStyle == ButtonStyle_Image) {
        //绘制图片
        drawImage(&painter);
    } else {
        //绘制背景
        drawBg(&painter);
        //绘制滑块
        drawSlider(&painter);
        //绘制文字
        drawText(&painter);
    }
}

void SwitchControl::drawBg(QPainter *painter)
{
    painter->save();
    painter->setPen(Qt::NoPen);

    if (!checked) {
        painter->setBrush(bgColorOff);
    } else {
        painter->setBrush(bgColorOn);
    }

    if (buttonStyle == ButtonStyle_Rect) {
        painter->drawRoundedRect(rect(), rectRadius, rectRadius);
    } else if (buttonStyle == ButtonStyle_CircleIn) {
        QRect rect(0, 0, width(), height());
        //半径为高度的一半
        int radius = rect.height() / 2;
        //圆的宽度为高度
        int circleWidth = rect.height();

        QPainterPath path;
        path.moveTo(radius, rect.left());
        path.arcTo(QRectF(rect.left(), rect.top(), circleWidth, circleWidth), 90, 180);
        path.lineTo(rect.width() - radius, rect.height());
        path.arcTo(QRectF(rect.width() - rect.height(), rect.top(), circleWidth, circleWidth), 270, 180);
        path.lineTo(radius, rect.top());

        painter->drawPath(path);
    } else if (buttonStyle == ButtonStyle_CircleOut) {
        QRect rect(space, space, width() - space * 2, height() - space * 2);
        painter->drawRoundedRect(rect, rectRadius, rectRadius);
    }

    painter->restore();
}

void SwitchControl::drawSlider(QPainter *painter)
{
    painter->save();
    painter->setPen(Qt::NoPen);

    if (!checked) {
        painter->setBrush(sliderColorOff);
    } else {
        painter->setBrush(sliderColorOn);
    }

    if (buttonStyle == ButtonStyle_Rect) {
        int sliderWidth = width() / 2 - space * 2;
        int sliderHeight = height() - space * 2;
        QRect sliderRect(startX + space, space, sliderWidth , sliderHeight);
        painter->drawRoundedRect(sliderRect, rectRadius, rectRadius);
    } else if (buttonStyle == ButtonStyle_CircleIn) {
        QRect rect(0, 0, width(), height());
        int sliderWidth = rect.height() - space * 2;
        QRect sliderRect(startX + space, space, sliderWidth, sliderWidth);
        painter->drawEllipse(sliderRect);
    } else if (buttonStyle == ButtonStyle_CircleOut) {
        QRect rect(0, 0, width() - space, height() - space);
        int sliderWidth = rect.height();
        QRect sliderRect(startX, space / 2, sliderWidth, sliderWidth);
        painter->drawEllipse(sliderRect);
    }

    painter->restore();
}

void SwitchControl::drawText(QPainter *painter)
{
    painter->save();

    if (!checked) {
        painter->setPen(textColorOff);
        painter->drawText(width() / 2, 0, width() / 2 - space, height(), Qt::AlignCenter, textOff);
    } else {
        painter->setPen(textColorOn);
        painter->drawText(0, 0, width() / 2 + space * 2, height(), Qt::AlignCenter, textOn);
    }

    painter->restore();
}

void SwitchControl::drawImage(QPainter *painter)
{
    painter->save();

    QPixmap pix;

    if (!checked) {
        pix = QPixmap(imageOff);
    } else {
        pix = QPixmap(imageOn);
    }

    //自动等比例平滑缩放居中显示
    int targetWidth = pix.width();
    int targetHeight = pix.height();
    pix = pix.scaled(targetWidth, targetHeight, Qt::KeepAspectRatio, Qt::SmoothTransformation);

    int pixX = rect().center().x() - targetWidth / 2;
    int pixY = rect().center().y() - targetHeight / 2;
    QPoint point(pixX, pixY);
    painter->drawPixmap(point, pix);

    painter->restore();
}

void SwitchControl::updateValue()
{
    if (checked) {
        if (startX < endX) {
            startX = startX + step;
        } else {
            startX = endX;
            timer->stop();
        }
    } else {
        if (startX > endX) {
            startX = startX - step;
        } else {
            startX = endX;
            timer->stop();
        }
    }

    update();
}

void SwitchControl::setChecked(bool checked)
{
    if (this->checked != checked) {
        this->checked = checked;
        emit checkedChanged(checked);
        update();
    }
}
void SwitchControl::setCheckedStatus(bool checked)
{
    if (this->checked != checked) {
        this->checked = checked;

    }
    update();
    step = width() / 50;
    //状态切换改变后自动计算终点坐标
    if (checked) {
        if (buttonStyle == ButtonStyle_Rect) {
            endX = width() - width() / 2;
        } else if (buttonStyle == ButtonStyle_CircleIn) {
            endX = width() - height();
        } else if (buttonStyle == ButtonStyle_CircleOut) {
            endX = width() - height() + space;
        }
    } else {
        endX = 0;
    }

    timer->start();

}
void SwitchControl::setButtonStyle(SwitchControl::ButtonStyle buttonStyle)
{
    this->buttonStyle = buttonStyle;
    update();
}

void SwitchControl::setBgColor(QColor bgColorOff, QColor bgColorOn)
{
    this->bgColorOff = bgColorOff;
    this->bgColorOn = bgColorOn;
    update();
}

void SwitchControl::setSliderColor(QColor sliderColorOff, QColor sliderColorOn)
{
    this->sliderColorOff = sliderColorOff;
    this->sliderColorOn = sliderColorOn;
    update();
}

void SwitchControl::setTextColor(QColor textColorOff, QColor textColorOn)
{
    this->textColorOff = textColorOff;
    this->textColorOn = textColorOn;
    update();
}

void SwitchControl::setText(QString textOff, QString textOn)
{
    this->textOff = textOff;
    this->textOn = textOn;
    update();
}

void SwitchControl::setImage(QString imageOff, QString imageOn)
{
    this->imageOff = imageOff;
    this->imageOn = imageOn;
    update();
}

void SwitchControl::setSpace(int space)
{
    this->space = space;
    update();
}

void SwitchControl::setRectRadius(int rectRadius)
{
    this->rectRadius = rectRadius;
    update();
}
/*#include <QPainter>
#include <QMouseEvent>


SwitchControl::SwitchControl(QWidget *parent)
    : QWidget(parent)
{
    m_nHeight=16;
    m_bChecked=false;
    m_radius=8.0;
    m_nMargin=5;
    m_checkedColor=QColor(0, 150, 136);
    m_thumbColor=Qt::white;
    m_disabledColor=QColor(190, 190, 190);
    m_background=Qt::black;
    setAttribute(Qt::WA_DeleteOnClose);
    // 鼠标滑过光标形状 - 手型
    setCursor(Qt::PointingHandCursor);

    // 连接信号槽
    connect(&m_timer, SIGNAL(timeout()), this, SLOT(onTimeout()));
}

// 绘制开关
void SwitchControl::paintEvent(QPaintEvent *event)
{
    Q_UNUSED(event);

    QPainter painter(this);
    painter.setPen(Qt::NoPen);
    painter.setRenderHint(QPainter::Antialiasing);

    QPainterPath path;
    QColor background;
    QColor thumbColor;
    qreal dOpacity;
    if (isEnabled()) { // 可用状态
        if (m_bChecked) { // 打开状态
            background = m_checkedColor;
            thumbColor = m_checkedColor;
            dOpacity = 0.600;
        } else { //关闭状态
            background = m_background;
            thumbColor = m_thumbColor;
            dOpacity = 0.800;
        }
    } else {  // 不可用状态
        background = m_background;
        dOpacity = 0.260;
        thumbColor = m_disabledColor;
    }
    // 绘制大椭圆
    painter.setBrush(background);
    painter.setOpacity(dOpacity);
    path.addRoundedRect(QRectF(m_nMargin, m_nMargin, width() - 2 * m_nMargin-(m_nHeight / 2), height() - 2 * m_nMargin), m_radius, m_radius);
    painter.drawPath(path.simplified());

    // 绘制小椭圆
    painter.setBrush(thumbColor);
    painter.setOpacity(1.0);
    painter.drawEllipse(QRectF(m_nX - (m_nHeight / 2), m_nY - (m_nHeight / 2), height(), height()));
}

// 鼠标按下事件
void SwitchControl::mousePressEvent(QMouseEvent *event)
{
    if (isEnabled()) {
        if (event->buttons() & Qt::LeftButton) {
            event->accept();
        } else {
            event->ignore();
        }
    }
}

// 鼠标释放事件 - 切换开关状态、发射toggled()信号
void SwitchControl::mouseReleaseEvent(QMouseEvent *event)
{
    if (isEnabled()) {
        if ((event->type() == QMouseEvent::MouseButtonRelease) && (event->button() == Qt::LeftButton)) {
            event->accept();
            m_bChecked = !m_bChecked;
            emit toggled(m_bChecked);
            m_timer.start(10);
        } else {
            event->ignore();
        }
    }
}

// 大小改变事件
void SwitchControl::resizeEvent(QResizeEvent *event)
{
    m_nX = m_nHeight / 2;
    m_nY = m_nHeight / 2;
    QWidget::resizeEvent(event);
}

// 默认大小
QSize SwitchControl::sizeHint() const
{
    return minimumSizeHint();
}

// 最小大小
QSize SwitchControl::minimumSizeHint() const
{
    return QSize(2 * (m_nHeight + m_nMargin), m_nHeight + 2 * m_nMargin);
}

// 切换状态 - 滑动
void SwitchControl::onTimeout()
{
    if (m_bChecked) {
        m_nX += 1;
        if (m_nX >= width() - m_nHeight*2)
            m_timer.stop();
    } else {
        m_nX -= 1;
        if (m_nX <= m_nHeight / 2)
            m_timer.stop();
    }
    update();
}

// 返回开关状态 - 打开：true 关闭：false
bool SwitchControl::isToggled() const
{
    return m_bChecked;
}

// 设置开关状态
void SwitchControl::setToggle(bool checked)
{
    m_bChecked = checked;
    m_timer.start(10);
}

// 设置背景颜色
void SwitchControl::setBackgroundColor(QColor color)
{
    m_background = color;
}
// 设置拇指颜色
void SwitchControl::setthumbColor(QColor color)
{
       //拇指颜色
    m_thumbColor = color;
}

// 设置选中颜色
void SwitchControl::setCheckedColor(QColor color)
{
    m_checkedColor = color;
}

// 设置不可用颜色
void SwitchControl::setDisbaledColor(QColor color)
{
    m_disabledColor = color;
}
*/