• 日期: 2026-09-16
  • 标签: 常规

#ifndef LIGHTS_H #define LIGHTS_H

#include

namespace Ui { class Lights; }

class Lights : public QWidget { Q_OBJECT

public: explicit Lights(int userid,QWidget *parent = nullptr); ~Lights(); void lightsWidget(); bool flag=false;

void showEvent(QShowEvent *event); // 重写界面
void hideEvent(QHideEvent *event); // 隐藏界面

void loadLastStatus(); // 加载上次更改的状态
void saveLastStatus(); // 保存当前更改的状态

public slots: bool switchButton_status(bool checked);

private: Ui::Lights *ui; int userid;

void closeEvent(QCloseEvent *event);
QString getLastBrightness(int userid);
QString getLastState(int userid);
void updateLastBrightness(int userid,  QString state,QString brightness);

};

#endif // LIGHTS_H

#include 'switchform.h' #include 'ui_switchform.h' #include

SwitchForm::SwitchForm(QWidget *parent) : QWidget(parent) { m_space = 2; m_radius = 5; m_checked = false; m_showText = true; m_showText = false; m_animation = true;

    m_bgColorOn = QColor(102, 205, 170);//设置按钮内部颜色
    m_bgColorOff = QColor(190, 190, 190);

    m_sliderColorOn = QColor(255, 255, 255);
    m_sliderColorOff = QColor(255, 255, 255);

    m_textColor = QColor(255, 255, 255);

    m_textOn = '开启';//设置按钮中的文字
    m_textOff = '关闭';

    m_step = 0;
    m_startX = 0;
    m_endX = 0;

    m_timer = new QTimer(this);
    m_timer->setInterval(30);
    connect(m_timer, SIGNAL(timeout()), this, SLOT(updateValue()));

}

void SwitchForm::drawBackGround(QPainter *painter) { painter->save(); painter->setPen(Qt::NoPen);

   QColor bgColor = m_checked ? m_bgColorOn : m_bgColorOff;
   if (isEnabled()) {
       bgColor.setAlpha(150);
   }

   painter->setBrush(bgColor);

   QRect rect(0, 0, width(), height());
   int side = qMin(width(), height());

   //左侧半圆
   QPainterPath path1;
   path1.addEllipse(rect.x(), rect.y(), side, side);

   //右侧半圆
   QPainterPath path2;
   path2.addEllipse(rect.width() - side, rect.y(), side, side);

   //中间的矩形
   QPainterPath path3;
   path3.addRect(rect.x() + side / 2, rect.y(), rect.width() - side, height());

   QPainterPath path = path1 + path2 + path3;
   painter->drawPath(path);

   //绘制文本

   //滑块半径
   int sliderWidth = qMin(height(), width()) - m_space * 2 - 5;
   if (m_checked){
       QRect textRect(0, 0, width() - sliderWidth, height());
       painter->setPen(QPen(m_textColor));
       painter->drawText(textRect, Qt::AlignCenter, m_textOn);
   } else {
       QRect textRect(sliderWidth, 0, width() - sliderWidth, height());
       painter->setPen(QPen(m_textColor));
       painter->drawText(textRect, Qt::AlignCenter, m_textOff);
   }

   painter->restore();

}

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

QColor color = m_checked ? m_sliderColorOn : m_sliderColorOff;

painter->setBrush(QBrush(color));

int sliderWidth = qMin(width(), height()) - m_space * 2;
int sliderX = m_checked ? width() - sliderWidth - m_space : m_space; // 修改滑块的X轴坐标
QRect rect(sliderX, m_space, sliderWidth, sliderWidth);
painter->drawEllipse(rect);

painter->restore();

}

void SwitchForm::paintEvent(QPaintEvent *ev) { //启用反锯齿 QPainter painter(this); painter.setRenderHints(QPainter::Antialiasing | QPainter::TextAntialiasing);

    //绘制背景
    drawBackGround(&painter);

    //绘制滑块
    drawSlider(&painter);

}

void SwitchForm::mousePressEvent(QMouseEvent *ev) { Q_UNUSED(ev)

setChecked(!m_checked);
emit statusChanged(m_checked);

// 计算步长
m_step = qAbs(m_endX - m_startX) / 10; // 修改步长的计算方式

// 判断是否使用动画
if (m_animation) {
    m_timer->start();
} else {
    m_startX = m_endX;
    update();
}

}

void SwitchForm::updateValue() { if (m_checked) { if (m_startX < m_endX) { m_startX += m_step; } else { m_startX = m_endX; m_timer->stop(); } } else { if (m_startX > m_endX) { m_startX -= m_step; } else { m_startX = m_endX; m_timer->stop(); } }

update();

}

int SwitchForm::space() const { return m_space; }

bool SwitchForm::checked() const { return m_checked; }

bool SwitchForm::showText() const { return m_showText; }

bool SwitchForm::showCircel() const { return m_showCircle; }

bool SwitchForm::animation() const { return m_animation; }

QColor SwitchForm::bgColorOn() const { return m_bgColorOn; }

QColor SwitchForm::bgColorOff() const { return m_bgColorOff; }

QColor SwitchForm::sliderColorOn() const { return m_sliderColorOn; }

QColor SwitchForm::sliderColorOff() const { return m_sliderColorOff; }

QColor SwitchForm::textColor() const { return m_textColor; }

QString SwitchForm::textOn() const { return m_textOn; }

QString SwitchForm::textOff() const { return m_textOff; }

int SwitchForm::step() const { return m_step; }

int SwitchForm::startX() const { return m_startX; }

int SwitchForm::endX() const { return m_endX; }

void SwitchForm::setSpace(int space) { if (m_space != space) { m_space = space; update(); } }

void SwitchForm::setRadius(int radius) { if (m_radius != radius) { m_radius = radius; update(); } }

void SwitchForm::setChecked(bool checked) { if (m_checked != checked) { m_checked = checked; update(); } }

void SwitchForm::setShowText(bool show) { if (m_showText != show) { m_showText = show; update(); } }

void SwitchForm::setShowCircle(bool show) { if (m_showCircle != show) { m_showCircle = show; update(); } }

void SwitchForm::setAnimation(bool ok) { if (m_animation != ok) { m_animation = ok; update(); } }

void SwitchForm::setBgColorOn(const QColor &color) { if (m_bgColorOn != color) { m_bgColorOn = color; update(); } }

void SwitchForm::setBgColorOff(const QColor &color) { if (m_bgColorOff != color) { m_bgColorOff = color; update(); } }

void SwitchForm::setSliderColorOn(const QColor &color) { if (m_sliderColorOn != color) { m_sliderColorOn = color; update(); } }

void SwitchForm::setSliderColorOff(const QColor &color) { if (m_sliderColorOff != color) { m_sliderColorOff = color; update(); } }

void SwitchForm::setTextColor(const QColor &color) { if (m_textColor != color) { m_textColor = color; update(); } }

void SwitchForm::setTextOn(const QString &text) { if (m_textOn != text) { m_textOn = text; update(); } }

void SwitchForm::setTextOff(const QString &text) { if (m_textOff != text) { m_textOff = text; update(); } }

bool SwitchForm::getstate() { return m_checked; }

#include 'lights.h' #include 'ui_lights.h' #include 'switchform.h' #include 'sqlite.h' #include #include #include #include #include

Lights::Lights(int userid,QWidget *parent) : QWidget(parent), ui(new Ui::Lights), userid(userid)//保证userid无变化 { ui->setupUi(this); lightsWidget(); //连接开关组件的信号和自定义的槽函数 connect(ui->SwitchStatus,&SwitchForm::statusChanged,this,&Lights::switchButton_status);

// 连接完成按钮的clicked信号和自定义的槽函数
connect(ui->Finished, &QPushButton::clicked, this,[=]{
    if(flag)
    {
        QString brighteness = QString::number(ui->ctrlform->getValue());
        qDebug()<<brighteness<<userid;
        updateSmartHomeStatus(userid,QString('智能灯'),QString('开启'),brighteness);
    }else
    {
        qDebug()<<'智能灯未打开！';
        updateSmartHomeStatus(userid,QString('智能灯'),QString('关闭'),QString('0'));
    }
});
// 加载上次更改的状态
    loadLastStatus();

}

Lights::~Lights() { delete ui; }

void Lights::lightsWidget() { setWindowTitle('智能灯设置'); //设置ui组件背景 setAutoFillBackground(true); QPalette palette=this->palette(); QPixmap pixmap(':/user/image/image/light.jpg'); palette.setBrush(QPalette::Window, QBrush(pixmap)); setPalette(palette); setFixedSize(600,400); }

bool Lights::switchButton_status(bool checked) { qDebug()<<checked; flag=checked; return flag; }

void Lights::showEvent(QShowEvent *event) { // 当页面显示时，加载上次更改的状态 loadLastStatus(); event->accept(); }

void Lights::hideEvent(QHideEvent *event) { saveLastStatus(); event->accept(); }

void Lights::closeEvent(QCloseEvent *event) { // 隐藏窗口而不是关闭 hide(); event->ignore(); }

void Lights::loadLastStatus() { qDebug()<userid; QString state = getLastState(this->userid); QString brightness = getLastBrightness(this->userid); qDebug()<<brightness; if (state=='开启') { ui->SwitchStatus->setChecked(true); ui->ctrlform->setValue(brightness.toInt()); } else { ui->SwitchStatus->setChecked(false); ui->ctrlform->setValue(0); } qDebug()<<brightness.toInt(); }

void Lights::saveLastStatus() { qDebug()<userid; QString state = QString(flag); QString brightness = QString::number(ui->ctrlform->getValue()); updateLastBrightness(this->userid,state, brightness); }

QString Lights::getLastBrightness(int userid) { Sqlite::sqlite_init(); QString queryStr = QString('SELECT value FROM Status WHERE uid = %1 AND device_name = '智能灯' ORDER BY sid DESC LIMIT 1').arg(userid); qDebug()<<queryStr<<userid; QSqlQuery query; qDebug ()<<query.exec(queryStr); if (query.exec(queryStr) && query.next()) { return query.value(0).toString(); } else { qDebug() << '得到上一次亮度错误: ' << query.lastError().text(); return ''; } }

void Lights::updateLastBrightness(int userid,QString state,QString brightness) { Sqlite::sqlite_init(); QString queryStr = QString('INSERT INTO Status (uid, device_name, device_state, value) VALUES (%1, '智能灯', '%2', %3)').arg(userid).arg(state).arg(brightness); QSqlQuery query; if (!query.exec(queryStr)) { qDebug() << '更新亮度失败: ' << query.lastError().text(); } }

QString Lights::getLastState(int userid) { Sqlite::sqlite_init(); QString queryStr = QString('SELECT device_state FROM Status WHERE uid = %1 AND device_name = '智能灯' ORDER BY sid DESC LIMIT 1').arg(userid); qDebug()<<queryStr<<userid; QSqlQuery query; qDebug ()<<query.exec(queryStr); if (query.exec(queryStr) && query.next()) { return query.value(0).toString(); } else { qDebug() << '得到上一次状态错误: ' << query.lastError().text(); return ''; } }

-- 创建用户表 CREATE TABLE IF NOT EXISTS users ( uid INTEGER PRIMARY KEY AUTOINCREMENT, username varchar(10), passwd varchar(10) );

-- 创建智能家居状态表 CREATE TABLE IF NOT EXISTS Status ( sid INTEGER PRIMARY KEY AUTOINCREMENT, uid INTEGER , device_name varchar(10), device_state varchar(10), value varchar(10), mode varchar(10), FOREIGN KEY (uid) REFERENCES users (uid) );

SELECT device_state FROM Status WHERE uid = 123 AND device_name = '智能灯'; SELECT device_state FROM Status WHERE uid = 123 AND device_name = '智能灯' ORDER BY sid DESC LIMIT 1 内容：代码修改部分如下：

在Lights类中的saveLastStatus()函数中，将状态和亮度存入数据库中：

void Lights::saveLastStatus()
{
    QString state = flag ? '开启' : '关闭';
    QString brightness = QString::number(ui->ctrlform->getValue());
    updateLastBrightness(this->userid, state, brightness);
}

void Lights::updateLastBrightness(int userid, QString state, QString brightness)
{
    Sqlite::sqlite_init();
    QString queryStr = QString('INSERT INTO Status (uid, device_name, device_state, value) VALUES (%1, '智能灯', '%2', %3)').arg(userid).arg(state).arg(brightness);
    QSqlQuery query;
    if (!query.exec(queryStr))
    {
        qDebug() << '更新亮度失败: ' << query.lastError().text();
    }
}

在Lights类中的loadLastStatus()函数中，从数据库中获取最新的状态和亮度：

void Lights::loadLastStatus()
{
    QString state = getLastState(this->userid);
    QString brightness = getLastBrightness(this->userid);
    if (state == '开启')
    {
        ui->SwitchStatus->setChecked(true);
        ui->ctrlform->setValue(brightness.toInt());
    }
    else
    {
        ui->SwitchStatus->setChecked(false);
        ui->ctrlform->setValue(0);
    }
}

QString Lights::getLastBrightness(int userid)
{
    Sqlite::sqlite_init();
    QString queryStr = QString('SELECT value FROM Status WHERE uid = %1 AND device_name = '智能灯' ORDER BY sid DESC LIMIT 1').arg(userid);
    QSqlQuery query;
    if (query.exec(queryStr) && query.next())
    {
        return query.value(0).toString();
    }
    else
    {
        qDebug() << '得到上一次亮度错误: ' << query.lastError().text();
        return '';
    }
}

QString Lights::getLastState(int userid)
{
    Sqlite::sqlite_init();
    QString queryStr = QString('SELECT device_state FROM Status WHERE uid = %1 AND device_name = '智能灯' ORDER BY sid DESC LIMIT 1').arg(userid);
    QSqlQuery query;
    if (query.exec(queryStr) && query.next())
    {
        return query.value(0).toString();
    }
    else
    {
        qDebug() << '得到上一次状态错误: ' << query.lastError().text();
        return '';
    }
}

此外，还需要在Lights类的头文件中添加以下函数声明：

QString getLastBrightness(int userid);
QString getLastState(int userid);
void updateLastBrightness(int userid, QString state, QString brightness);

以及在SwitchForm类的头文件中添加以下函数声明：

bool getstate();

在SwitchForm类的cpp文件中添加以下函数实现：

bool SwitchForm::getstate()
{
    return m_checked;
}

以上是根据问题描述进行的代码修改，可能还有其他未提及的问题需要解决。请根据实际需求进行相应的修改和调试。

智能灯设置页面代码优化：保存和加载最新状态

原文地址: https://www.cveoy.top/t/topic/fAXT 著作权归作者所有。请勿转载和采集!

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