从零开始的Qt开发指南：（七）Qt常用控件之按钮类控件深度解析：从 QPushButton 到单选 / 复选的实战指南

#include "widget.h"
#include <QPushButton>
#include <QDebug>
#include <QFont>

Widget::Widget(QWidget *parent)
    : QWidget(parent)
{
    // 1. 创建QPushButton对象，指定父控件为当前Widget
    // 父控件设置的好处：自动管理内存，避免内存泄漏；按钮随父控件移动而移动
    QPushButton *btn = new QPushButton("点击我打印日志", this);
    
    // 2. 设置按钮的位置和尺寸（x坐标、y坐标、宽度、高度）
    // Qt坐标系：父控件左上角为原点(0,0)，向右x增加，向下y增加
    btn->setGeometry(60, 50, 220, 60);
    
    // 3. 美化按钮：设置字体
    QFont btnFont;
    btnFont.setFamily("微软雅黑");  // 字体家族
    btnFont.setPointSize(14);      // 字体大小
    btnFont.setBold(true);         // 字体加粗
    btn->setFont(btnFont);
    
    // 4. 绑定信号槽：按钮点击时触发自定义逻辑
    // 信号：QPushButton::clicked()（按钮被点击时发射）
    // 槽函数：使用lambda表达式（Qt 5.4+支持，简洁高效）
    connect(btn, &QPushButton::clicked, this, []() {
        qDebug() << "✅ QPushButton被点击！这是第一个按钮案例~";
    });
    
    // 5. 设置窗口属性
    this->setFixedSize(350, 180);  // 固定窗口大小
    this->setWindowTitle("QPushButton基础案例");  // 窗口标题
}

Widget::~Widget()
{
}

#include "widget.h"
#include "ui_widget.h"

Widget::Widget(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::Widget)
{
    ui->setupUi(this);
    //创建图标对象
    QIcon icon(":/anno.png");
    //设置图标
    ui->pushButton->setIcon(icon);
    //设置图标尺寸
    ui->pushButton->setIconSize(QSize(50, 50));
}

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

#include "widget.h"
#include "ui_widget.h"

Widget::Widget(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::Widget)
{
    ui->setupUi(this);

    //设置这些按钮的图标
    ui->pushButton_target->setIcon(QIcon(":/anno.png"));
    ui->pushButton_target->setIconSize(QSize(160, 160));

    ui->pushButton_up->setIcon(QIcon(":/UP.png"));
    ui->pushButton_up->setIconSize(QSize(50, 50));

    ui->pushButton_down->setIcon(QIcon(":/Down.png"));
    ui->pushButton_down->setIconSize(QSize(50, 50));

    ui->pushButton_right->setIcon(QIcon(":/Right.png"));
    ui->pushButton_right->setIconSize(QSize(50, 50));

    ui->pushButton_left->setIcon(QIcon(":/Left.png"));
    ui->pushButton_left->setIconSize(QSize(50, 50));

    //直接通过按键名字来设置
//    ui->pushButton_up->setShortcut(QKeySequence("w"));
//    ui->pushButton_down->setShortcut(QKeySequence("s"));
//    ui->pushButton_right->setShortcut(QKeySequence("d"));
//    ui->pushButton_left->setShortcut(QKeySequence("a"));

    //通过按键的枚举来设置
    ui->pushButton_up->setShortcut(QKeySequence(Qt::Key_W));
    ui->pushButton_down->setShortcut(QKeySequence(Qt::Key_S));
    ui->pushButton_right->setShortcut(QKeySequence(Qt::Key_D));
    ui->pushButton_left->setShortcut(QKeySequence(Qt::Key_A));

    //开启鼠标点击连发功能
    ui->pushButton_up->setAutoRepeat(true);
    ui->pushButton_down->setAutoRepeat(true);
    ui->pushButton_right->setAutoRepeat(true);
    ui->pushButton_left->setAutoRepeat(true);
}

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


void Widget::on_pushButton_up_clicked()
{
    //获取到target的位置
    QRect rect = ui->pushButton_target->geometry();
    //基于上次的位置，设置新的位置
    ui->pushButton_target->setGeometry(rect.x(), rect.y() - 5, rect.width(), rect.height());
}

void Widget::on_pushButton_down_clicked()
{
    //获取到target的位置
    QRect rect = ui->pushButton_target->geometry();
    //基于上次的位置，设置新的位置
    ui->pushButton_target->setGeometry(rect.x(), rect.y() + 5, rect.width(), rect.height());
}

void Widget::on_pushButton_left_clicked()
{
    //获取到target的位置
    QRect rect = ui->pushButton_target->geometry();
    //基于上次的位置，设置新的位置
    ui->pushButton_target->setGeometry(rect.x() - 5, rect.y(), rect.width(), rect.height());
}
void Widget::on_pushButton_right_clicked()
{
    //获取到target的位置
    QRect rect = ui->pushButton_target->geometry();
    //基于上次的位置，设置新的位置
    ui->pushButton_target->setGeometry(rect.x() + 5, rect.y(), rect.width(), rect.height());
}

#include "widget.h"
#include "ui_widget.h"

Widget::Widget(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::Widget)
{
    ui->setupUi(this);

    //添加一个默认的选项
    ui->radioButton_male->setChecked(true);
    ui->label->setText("您选择的性别为：男");

    //禁用选项
    //只是能够让按钮不被选中，但还是可以响应点击事件
    //ui->radioButton_other->setCheckable(false);
    ui->radioButton_other->setEnabled(false);
}

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


void Widget::on_radioButton_male_clicked()
{
    //把label的内容更新
    ui->label->setText("您选择的性别为：男");
}

void Widget::on_radioButton_female_clicked()
{
    //把label的内容更新
    ui->label->setText("您选择的性别为：女");
}

void Widget::on_radioButton_other_clicked()
{
    //把label的内容更新
    ui->label->setText("您选择的性别为：其他");
}

#include "widget.h"
#include "ui_widget.h"
#include <QButtonGroup>

Widget::Widget(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::Widget)
{
    ui->setupUi(this);

    //使用QButtonGroup对单选按钮分组
    QButtonGroup* group1 = new QButtonGroup(this);
    QButtonGroup* group2 = new QButtonGroup(this);
    QButtonGroup* group3 = new QButtonGroup(this);

    //把上述单选按钮放到不同的组里
    group1->addButton(ui->radioButton);
    group1->addButton(ui->radioButton_2);
    group1->addButton(ui->radioButton_3);

    group2->addButton(ui->radioButton_4);
    group2->addButton(ui->radioButton_5);
    group2->addButton(ui->radioButton_6);

    group3->addButton(ui->radioButton_7);
    group3->addButton(ui->radioButton_8);
}

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

#include "widget.h"
#include "ui_widget.h"

Widget::Widget(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::Widget)
{
    ui->setupUi(this);
}

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


void Widget::on_pushButton_clicked()
{
    QString result = "今天你的安排是：";
    if(ui->checkBox_study->isChecked())
    {
        result += ui->checkBox_study->text() + " ";
    }
    if(ui->checkBox_game->isChecked())
    {
        result += ui->checkBox_game->text() + " ";
    }
    if(ui->checkBox_work->isChecked())
    {
        result += ui->checkBox_work->text() + " ";
    }
    ui->label->setText(result);
}