Qt 总结

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Qt

qt不跟随系统主题色 qputenv(“QT_QPA_PLATFORM”, “windows:darkmode=0”);

相关模块

Qt 布局设计常用

布局可以理解为带有一定方向对齐属性的html的div 常用属性 addWidget，addLayout，addSpacing 间距

水平布局 QHBoxLayout 和 QVBoxLayout（垂直布局）

    level::level(QWidget *parent) : QWidget(parent) {
        this->setWindowTitle("水平布局");
        this->setFixedSize(800, 600);

        auto *level = new QHBoxLayout(this);
        auto *path = new QLabel(this);
        path->setObjectName("path");
        path->setText("path");
        path->setFixedSize(40, 50);

        auto *edit = new QLineEdit(this);
        edit->setObjectName("edit");
        edit->setFixedSize(100, 50);

        auto *button = new QPushButton(this);
        button->setObjectName("button");
        button->setText("button1");
        level->setAlignment(Qt::AlignLeft); //向左对齐
        level->addWidget(path);
        level->addWidget(button);
        level->addWidget(edit);

        auto *vertical = new QVBoxLayout(this);

        auto *button1 = new QPushButton("按钮 1");
        auto *button2 = new QPushButton("按钮 2");
        auto *button3 = new QPushButton("按钮 3");

        vertical->addWidget(button1);
        vertical->addWidget(button2);
        vertical->addWidget(button3);
        level->addLayout(vertical); //添加垂直
    } 

QGridLayout（网格布局）

类似于表格的排列 addWidget(button1, 0, 0); // 放置在第一行第一列

fence::fence(QWidget *parent) :
    QWidget(parent) {
    auto* layout = new QGridLayout(this);

    auto *button1 = new QPushButton("按钮 1");
    auto *button2 = new QPushButton("按钮 2");

    auto *vertical = new QVBoxLayout(this);
    auto *b1 = new QPushButton("按钮 1");
    auto *b2 = new QPushButton("按钮 2");
    auto *b3 = new QPushButton("按钮 3");
    vertical->addWidget(b1);
    vertical->addWidget(b2);
    vertical->addWidget(b3);

    layout->addWidget(button1,0,1);
    layout->addWidget(button2,1,1);
    layout->addLayout(vertical,0,0);
}

QStackedLayout（堆叠布局）

 this->setWindowTitle("堆栈布局");
        this->setFixedSize(600, 400);

        //切换按钮
        auto *pButton = new QPushButton("点击切换", this);

        //切换的页面
        auto *pFirstPage = new QLabel(this);
        pFirstPage->setStyleSheet("QLabel{background-color:rgb(255, 0, 0)}");
        auto *pSecondPage = new QLabel(this);
        pSecondPage->setStyleSheet("QLabel{background-color:rgb(255, 255, 0)}");
        auto *pThirdPage = new QLabel(this);
        pThirdPage->setStyleSheet("QLabel{background-color:rgb(255, 0, 255)}");

        // 添加页面（用于切换）
        auto *m_pStackedLayout = new QStackedLayout();
        m_pStackedLayout->addWidget(pFirstPage);
        m_pStackedLayout->addWidget(pSecondPage);
        m_pStackedLayout->addWidget(pThirdPage);

        //绑定事件 槽
        connect(pButton, &QPushButton::clicked, this, [=]() {
            int nextPage = (m_pStackedLayout->currentIndex() + 1) % m_pStackedLayout->count();
            m_pStackedLayout->setCurrentIndex(nextPage);
        });

        //垂直布局
        auto *pLayout = new QVBoxLayout(this);
        pLayout->addWidget(pButton, 0, Qt::AlignLeft | Qt::AlignVCenter);
        pLayout->addLayout(m_pStackedLayout);
        pLayout->setSpacing(10);
        pLayout->setContentsMargins(10, 10, 10, 10);

QFormLayout（表单布局）

QFormLayout *formLayout = new QFormLayout(&window);  
  
    QLabel *nameLabel = new QLabel("姓名:");  
    QLineEdit *nameLineEdit = new QLineEdit();  
  
    QLabel *ageLabel = new QLabel("年龄:");  
    QLineEdit *ageLineEdit = new QLineEdit();  
  
    formLayout->addRow(nameLabel, nameLineEdit);  
    formLayout->addRow(ageLabel, ageLineEdit);  

QSplitter（分裂器布局）不算布局

  this->setWindowTitle("分裂器");
        //水平布局
        auto *layout = new QHBoxLayout(this);

        auto *splitter = new QSplitter(this);
        auto *widget = new QWidget(this);
        widget->setWindowIconText("aa");
        widget->setStyleSheet("background-color: rgb(25, 156, 0);");
        widget->setMinimumSize(QSize(300, 300));//固定最小宽高

        splitter->addWidget(widget);
        //父级关联  不关联不发拖动
        auto* splitter2 = new QSplitter(Qt::Vertical,splitter);
        //鼠标弹起后在分割
        splitter2->setOpaqueResize(false);

        auto *widget2 = new QWidget(this);
        widget2->setWindowIconText("bb");
        widget2->setStyleSheet("background-color: rgb(255, 156, 0);");
        widget2->setMinimumSize(QSize(300, 300));

        auto* text = new QTextBrowser(this);
        text->setReadOnly(false);//只读或者可编辑
        splitter2->addWidget(widget2);
        splitter2->addWidget(text);

        splitter->addWidget(splitter2);

        //添加分裂器
        layout->addWidget(splitter);

QGroupBox（分组框布局）

  this->setWindowTitle("分组框布局");

    // 主 ：创建一个垂直布局
    auto *layout = new QVBoxLayout(this);

    // 创建一个QGroupBox
    auto *groupBox = new QGroupBox("选项组", this);
    groupBox->setCheckable(true); // 设置QGroupBox为可选中

    // 在QGroupBox中添加控件
    auto *checkBox1 = new QCheckBox("选项1", groupBox);
    auto *checkBox2 = new QCheckBox("选项2", groupBox);
    auto *radioButton1 = new QRadioButton("单选1", groupBox);
    auto *radioButton2 = new QRadioButton("单选2", groupBox);
    auto *lineEdit = new QLineEdit(groupBox);

    // 内：创建一个水平布局来组织QGroupBox内的控件
    auto *groupBoxLayout = new QHBoxLayout(groupBox);
    groupBoxLayout->addWidget(checkBox1);
    groupBoxLayout->addWidget(checkBox2);
    groupBoxLayout->addWidget(radioButton1);
    groupBoxLayout->addWidget(radioButton2);
    groupBoxLayout->addWidget(lineEdit);

    // 创建第二个个QGroupBox
    auto *groupBox2 = new QGroupBox("第二组", this);
    auto *checkBox5 = new QCheckBox("选项1", groupBox2);
    // 内：创建一个水平布局来组织QGroupBox内的控件
    auto *groupBoxLayout2 = new QHBoxLayout(groupBox2);
    groupBoxLayout2->addWidget(checkBox5);

    // 将QGroupBox添加到主窗口的布局中
    layout->addWidget(groupBox);
    layout->addWidget(groupBox2);

qt 类

qt 窗口类

QMainWindow : 包含菜单栏、工具栏、状态栏 QWidget:空窗口 常用 QDialog: 对话框，登录，弹窗，设置

Qt 常用库说明

Qt 信号与槽

connect(const QObject *sender, const char *signal, const QObject *receiver, const char *member, Qt::ConnectionType = Qt::AutoConnection) connect(Button, &QPushButton::clicked, this, &槽函数方法);// 或者lambda {}

Qt network

Qt

Reference