Qt——布局管理器
运行截图:
代码:
#include "mainwindow.h" #include <QApplication> #include <QHBoxLayout> #include <QWidget> #include <QSpinBox> #include <QObject> #include <QHBoxLayout> #include <QSlider> int main(int argc, char *argv[]) { QApplication app(argc, argv); QWidget window; window.setWindowTitle("Enter your age"); //QSpinBox是只能输入数字的输入框,并且带有上下箭头的步进按钮 QSpinBox *spinBox = new QSpinBox(&window); //QSlider是带有滑块的滑竿 QSlider *slider = new QSlider(Qt::Horizontal, &window); spinBox->setRange(0, 130); slider->setRange(0, 130); //将 slider 的valueChanged()信号同 spinBox 的setValue()函数相连 QObject::connect(slider, &QSlider::valueChanged, spinBox, &QSpinBox::setValue); //显式指定valueChanged函数,指定其参数为int void (QSpinBox:: *spinBoxSignal)(int) = &QSpinBox::valueChanged; QObject::connect(spinBox, spinBoxSignal, slider, &QSlider::setValue); spinBox->setValue(19); //布局管理器 QHBoxLayout *layout = new QHBoxLayout; layout->addWidget(spinBox); layout->addWidget(slider); window.setLayout(layout); window.show(); return app.exec(); }