QPushButton

main.cpp

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#include <QApplication>
#include <QWidget>
#include <QPushButton>
#include <QVBoxLayout>
#include <QMenu>
#include <QShortcut>
#include <QDebug>
#include <qstyle.h>

void setupButtonDemo(QWidget *parent) {
    QVBoxLayout *layout = new QVBoxLayout(parent);

    // --- 1. 基础按钮 ---
    QPushButton *normalBtn = new QPushButton("普通按钮", parent);

    // --- 2. 带图标和快捷键的按钮 ---
    QPushButton *iconBtn = new QPushButton("保存 (Ctrl+S)", parent);
    iconBtn->setIcon(parent->style()->standardIcon(QStyle::SP_DriveHDIcon));
    iconBtn->setShortcut(QKeySequence("Ctrl+S")); // 绑定快捷键

    // --- 3. 开关按钮 (Checkable) ---
    // 这种按钮点击一下会陷进去，再点一下弹出来，适合做“静音”、“锁定”等功能
    QPushButton *toggleBtn = new QPushButton("开启静音", parent);
    toggleBtn->setCheckable(true);

    QObject::connect(toggleBtn, &QPushButton::toggled, [toggleBtn](bool checked) {
        if (checked) {
            toggleBtn->setText("静音中...");
        } else {
            toggleBtn->setText("开启静音");
        }
    });

    // --- 4. 带菜单的按钮 ---
    QPushButton *menuBtn = new QPushButton("更多选项", parent);
    QMenu *menu = new QMenu(menuBtn);
    menu->addAction("个人资料");
    menu->addAction("退出登录");
    menuBtn->setMenu(menu); // 点击按钮会直接弹出菜单

    // --- 5. 信号处理：基本的 clicked ---
    QObject::connect(normalBtn, &QPushButton::clicked, []() {
        qDebug() << "普通按钮被点击了！";
    });

    layout->addWidget(normalBtn);
    layout->addWidget(iconBtn);
    layout->addWidget(toggleBtn);
    layout->addWidget(menuBtn);
    layout->addStretch();
}

int main(int argc, char *argv[]) {
    QApplication a(argc, argv);
    QWidget w;
    w.setWindowTitle("QPushButton 全能演示");
    w.resize(300, 250);
    setupButtonDemo(&w);
    w.show();
    return a.exec();
}