Qt学习之路(3)：布局

布局可以使得控件随着窗口的变化而变化。

#include <QApplication>
#include "QSpinBox"
#include "QWidget"
#include "QSlider"
#include "QHBoxLayout"
#include "QStyle"
#include "memory"
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
   //QApplication::setStyle("plastique");

    QWidget window;
   window.setAutoFillBackground(true);
   window.setWindowIcon(QIcon(":/image/rose"));
   QPalette palette;
    palette.setColor(QPalette::Background, QColor(180,200,100));//
   //palette.setBrush(QPalette::Background, QBrush(QPixmap(":/image/rose")));
    window.setPalette(palette);
    window.setWindowTitle("Enter your age");//指定窗口名字
    auto *spinBox = new QSpinBox(&window);//该box作为window的子对象
    auto slider = new QSlider(Qt::Horizontal,&window);//该slider作为window的子对象
    spinBox->setRange(0,130);
    slider->setRange(0,130);
    QObject::connect(slider,QSlider::valueChanged,spinBox,QSpinBox::setValue);
   void (QSpinBox:: *spinBoxSignal)(int) = &QSpinBox::valueChanged;//显式的指定函数指针
    QObject::connect(spinBox,spinBoxSignal,slider,QSlider::setValue);
    spinBox->setValue(35);
   auto layout = new QHBoxLayout;//创建一个水平布局
   layout->addWidget(spinBox);
   layout->addWidget(slider);
   window.setLayout(layout);
   window.show();

    return a.exec();
}

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