text: #include "widget.h"
  
  #include <QDebug>
  #include <QTableWidget>
  #include <QProgressBar>
  #include <QPushButton>
  #include <QApplication>
  #include <QSlider>
  #include <QScrollBar>
  #include <QStyleFactory>
  
  Widget::Widget(QWidget *parent)
      : QWidget(parent)
  {
      init();
  }
  
  Widget::~Widget()
  {
  
  }
  
  void Widget::init()
  {
      QTableWidget *table = new QTableWidget(10, 10, this);
      table->move(10, 10);
  
      QScrollBar *scrollBarH = new QScrollBar(this);
      scrollBarH->move(300, 50);
      scrollBarH->setRange(0, 100);
      scrollBarH->setValue(34);
      scrollBarH->resize(380, 20);
      scrollBarH->setOrientation(Qt::Horizontal);
  
      QScrollBar *scrollBarV = new QScrollBar(this);
      scrollBarV->move(50, 250);
      scrollBarV->setRange(0, 100);
      scrollBarV->setValue(67);
      scrollBarV->resize(20, 380);
      scrollBarV->setOrientation(Qt::Vertical);
  
      QProgressBar* progreH = new QProgressBar(this);
      progreH->move(300, 100);
      progreH->resize(250, 40);
      progreH->setValue(37);
      progreH->setOrientation(Qt::Horizontal);
  
      QProgressBar* progreV = new QProgressBar(this);
      progreV->move(100, 300);
      progreV->resize(40, 250);
      progreV->setValue(67);
      progreV->setOrientation(Qt::Vertical);
  
      int i = 0;
      QStringList listStyle = QStyleFactory::keys();
      foreach(QString val, listStyle) {   //打印当前系统支持的系统风格
          qDebug()<<val<<"  ";
          QPushButton *btn = new QPushButton(val, this);
          btn->move(this->rect().right() - 100, this->rect().top() + i++ * 40);
          connect(btn, &QPushButton::clicked, this, [=](){
              qApp->setStyle(val);
          });
      }
  
  }
  