Qt4 关于实现滚动条

由于界面上的图标比较多的话就必须加滚动了

#ifndef STATE1_H
#define STATE1_H

#include <QWidget>
#include "mytoolbutton.h"
class QToolButton;
class QFrame;
class QScrollArea;
class QGridLayout;

class State1_Main : public QWidget
{
    Q_OBJECT
public:
    explicit State1_Main(QWidget *parent = 0);
    virtual ~State1_Main();

    void translatestring_state1();
signals:
   
public slots:

private:
    QToolButton *toolbutton1;
    QToolButton *toolbutton2;
    QToolButton *toolbutton3;
    QToolButton *toolbutton4;
    QToolButton *toolbutton5;
    QToolButton *toolbutton6;
    QToolButton *toolbutton7;
    QToolButton *toolbutton8;
    QToolButton *toolbu