1、概述
源码放在文章末尾

该项目为访客管理平台demo，包含主界面、系统设置、警情查询、调试帮助、用户退出功能。

项目部分代码如下：

#pragma execution_character_set("utf-8")

#include "frmmain.h"
#include "ui_frmmain.h"
#include "iconhelper.h"
#include "qthelper.h"

frmMain::frmMain(QWidget *parent) : QWidget(parent), ui(new Ui::frmMain)
{
    ui->setupUi(this);
    this->initForm();
    this->initStyle();
    this->initLeftMain();
    this->initLeftConfig();
}

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

bool frmMain::eventFilter(QObject *watched, QEvent *event)
{
    if (watched == ui->widgetTitle) {
        if (event->type() == QEvent::MouseButtonDblClick) {
            on_btnMenu_Max_clicked();
        }
    }
    return QWidget::eventFilter(watched, event);
}

void frmMain::getQssColor(const QString &qss, const QString &flag, QString &color)
{
    int index = qss.indexOf(flag);
    if (index >= 0) {
        color = qss.mid(index + flag.length(), 7);
    }
    //qDebug() << TIMEMS << flag << color;
}

void frmMain::getQssColor(const QString &qss, QString &textColor, QString &panelColor,
                          QString &borderColor, QString &normalColorStart, QString &normalColorEnd,
                          QString &darkColorStart, QString &darkColorEnd, QString &highColor)
{
    getQssColor(qss, "TextColor:", textColor);
    getQssColor(qss, "PanelColor:", panelColor);
    getQssColor(qss, "BorderColor:", borderColor);
    getQssColor(qss, "NormalColorStart:", normalColorStart);
    getQssColor(qss, "NormalColorEnd:", normalColorEnd);
    getQssColor(qss, "DarkColorStart:", darkColorStart);
    getQssColor(qss, "DarkColorEnd:", darkColorEnd);
    getQssColor(qss, "HighColor:", highColor);
}

void frmMain::initForm()
{
    //设置无边框
    QtHelper::setFramelessForm(this);
    //设置图标
    IconHelper::setIcon(ui->labIco, 0xf073, 30);
    IconHelper::setIcon(ui->btnMenu_Min, 0xf068);
    IconHelper::setIcon(ui->btnMenu_Max, 0xf067);
    IconHelper::setIcon(ui->btnMenu_Close, 0xf00d);

    //ui->widgetMenu->setVisible(false);
    ui->widgetTitle->setProperty("form", "title");
    //关联事件过滤器用于双击放大
    ui->widgetTitle->installEventFilter(this);
    ui->widgetTop->setProperty("nav", "top");

    QFont font;
    font.setPixelSize(25);
    ui->labTitle->setFont(font);
    ui->labTitle->setText("智能访客管理平台");
    this->setWindowTitle(ui->labTitle->text());

    ui->stackedWidget->setStyleSheet("QLabel{font:60px;}");

    QSize icoSize(32, 32);
    int icoWidth = 85;

    //设置顶部导航按钮
    QList<QAbstractButton *> tbtns = ui->widgetTop->findChildren<QAbstractButton *>();
    foreach (QAbstractButton *btn, tbtns) {
        btn->setIconSize(icoSize);
        btn->setMinimumWidth(icoWidth);
        btn->setCheckable(true);
        connect(btn, SIGNAL(clicked()), this, SLOT(buttonClick()));
    }

    ui->btnMain->click();

    ui->widgetLeftMain->setProperty("flag", "left");
    ui->widgetLeftConfig->setProperty("flag", "left");
    ui->page1->setStyleSheet(QString("QWidget[flag=\"left\"] QAbstractButton{min-height:%1px;max-height:%1px;}").arg(60));
    ui->page2->setStyleSheet(QString("QWidget[flag=\"left\"] QAbstractButton{min-height:%1px;max-height:%1px;}").arg(25));
}

void frmMain::initStyle()
{
    //加载样式表
    QString qss = QtHelper::getStyle(":/qss/blacksoft.css");
    if (!qss.isEmpty()) {
        QString paletteColor = qss.mid(20, 7);
        qApp->setPalette(QPalette(QColor(paletteColor)));
        qApp->setStyleSheet(qss);
    }

    //先从样式表中取出对应的颜色
    QString textColor, panelColor, borderColor, normalColorStart, normalColorEnd, darkColorStart, darkColorEnd, highColor;
    getQssColor(qss, textColor, panelColor, borderColor, normalColorStart, normalColorEnd, darkColorStart, darkColorEnd, highColor);

    //将对应颜色设置到控件
    this->borderColor = highColor;
    this->normalBgColor = normalColorStart;
    this->darkBgColor = panelColor;
    this->normalTextColor = textColor;
    this->darkTextColor = normalTextColor;
}

void frmMain::buttonClick()
{
    QAbstractButton *b = (QAbstractButton *)sender();
    QString name = b->text();

    QList<QAbstractButton *> tbtns = ui->widgetTop->findChildren<QAbstractButton *>();
    foreach (QAbstractButton *btn, tbtns) {
        btn->setChecked(btn == b);
    }

    if (name == "主界面") {
        ui->stackedWidget->setCurrentIndex(0);
    } else if (name == "系统设置") {
        ui->stackedWidget->setCurrentIndex(1);
    } else if (name == "警情查询") {
        ui->stackedWidget->setCurrentIndex(2);
    } else if (name == "调试帮助") {
        ui->stackedWidget->setCurrentIndex(3);
    } else if (name == "用户退出") {
        exit(0);
    }
}

void frmMain::initLeftMain()
{
    iconsMain << 0xf030 << 0xf03e << 0xf247;
    btnsMain << ui->tbtnMain1 << ui->tbtnMain2 << ui->tbtnMain3;

    for (int i = 0; i < btnsMain.count(); ++i) {
        QToolButton *btn = (QToolButton *)btnsMain.at(i);
        btn->setCheckable(true);
        btn->setToolButtonStyle(Qt::ToolButtonTextUnderIcon);
        connect(btn, SIGNAL(clicked(bool)), this, SLOT(leftMainClick()));
    }

    IconHelper::StyleColor styleColor;
    styleColor.position = "left";
    styleColor.iconSize = 18;
    styleColor.iconWidth = 35;
    styleColor.iconHeight = 25;
    styleColor.borderWidth = 4;
    styleColor.borderColor = borderColor;
    styleColor.setColor(normalBgColor, normalTextColor, darkBgColor, darkTextColor);
    IconHelper::setStyle(ui->widgetLeftMain, btnsMain, iconsMain, styleColor);
    ui->tbtnMain1->click();
}

void frmMain::initLeftConfig()
{
    iconsConfig << 0xf031 << 0xf036 << 0xf249 << 0xf055 << 0xf05a << 0xf249;
    btnsConfig << ui->tbtnConfig1 << ui->tbtnConfig2 << ui->tbtnConfig3 << ui->tbtnConfig4 << ui->tbtnConfig5 << ui->tbtnConfig6;

    for (int i = 0; i < btnsConfig.count(); ++i) {
        QToolButton *btn = (QToolButton *)btnsConfig.at(i);
        btn->setCheckable(true);
        btn->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
        connect(btn, SIGNAL(clicked(bool)), this, SLOT(leftConfigClick()));
    }

    IconHelper::StyleColor styleColor;
    styleColor.position = "left";
    styleColor.iconSize = 16;
    styleColor.iconWidth = 20;
    styleColor.iconHeight = 20;
    styleColor.borderWidth = 3;
    styleColor.borderColor = borderColor;
    styleColor.setColor(normalBgColor, normalTextColor, darkBgColor, darkTextColor);
    IconHelper::setStyle(ui->widgetLeftConfig, btnsConfig, iconsConfig, styleColor);
    ui->tbtnConfig1->click();
}

void frmMain::leftMainClick()
{
    QAbstractButton *b = (QAbstractButton *)sender();
    QString name = b->text();
    for (int i = 0; i < btnsMain.count(); ++i) {
        QAbstractButton *btn = btnsMain.at(i);
        btn->setChecked(btn == b);
    }

    ui->lab1->setText(name);
}

void frmMain::leftConfigClick()
{
    QToolButton *b = (QToolButton *)sender();
    QString name = b->text();
    for (int i = 0; i < btnsConfig.count(); ++i) {
        QAbstractButton *btn = btnsConfig.at(i);
        btn->setChecked(btn == b);
    }

    ui->lab2->setText(name);
}

void frmMain::on_btnMenu_Min_clicked()
{
    showMinimized();
}

void frmMain::on_btnMenu_Max_clicked()
{
    static bool max = false;
    static QRect location = this->geometry();

    if (max) {
        this->setGeometry(location);
    } else {
        location = this->geometry();
        this->setGeometry(QtHelper::getScreenRect());
    }

    this->setProperty("canMove", max);
    max = !max;
}

void frmMain::on_btnMenu_Close_clicked()
{
    close();
}

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