的Qt显示所有类对象（UI元素）到一个主窗口

Question

时许设计摄像头应用程序，所以我有MenuBarClass（这将创建菜单图标），CameraViewClass（创建图像控件在那里得到实时显示图像），RecentImageClass（显示最近的图像），所以我想要在一个主窗口中显示所有类对象（例如：菜单图标，图像小部件，最新图像小部件）。我在菜单栏类中使用了所有类实例对象，但仍然无法在主窗口中显示所有内容。我没有使用ui表单。

class MenuBar : public QMainWindow 
{ 
    Q_OBJECT 

public: 
    MenuBar(QWidget *parent = 0); 
    ~MenuBar(); 
    void CrateAction(); 
    void CreateStatusbar(); 
public slots: 
    void open(); 
private: 
    CameraView *mview; 
    RecentImage *mImage; 
    QMenu *mFile; 
    QMenu *mPath; 
    QMenu *mSave; 
    QWidget *mcentralwidget; 
    QWidget *wid; 
}; 

MenuBar::MenuBar(QWidget *parent) 
    : QMainWindow(parent), 
     mFile(NULL), 
     mPath(NULL), 
     mSave(NULL), 
     mcentralwidget(NULL) 

{ 
    mview=new CameraView(this); 
    mImage=new RecentImage(this); 

    //mcentralwidget=new QWidget(this); 
    //setCentralWidget(mcentralwidget); 

    resize(800,600); 
    CrateAction(); 
    CreateStatusbar(); 
} 


class CameraView : public QMainWindow 
{ 
    Q_OBJECT 
public: 
    explicit CameraView(QWidget *parent = 0); 
    void SetCamera(const QCameraInfo& view); 
    void StartCamera(); 
    void StopCamera(); 
    void Record(); 
    void Pause(); 
public slots: 

private: 
    QWidget *mImageWidget; 
    QCamera *mCamera; 
    QCameraImageCapture *mImageCapture; 
    QMediaRecorder *mRecorder; 
}; 

CameraView::CameraView(QWidget *parent) : 
    QMainWindow(parent), 
    mCamera(NULL), 
    mImageCapture(NULL), 
    mRecorder(NULL), 
    mImageWidget(NULL) 
{ 
    mImageWidget=new QWidget(); 
    mImageWidget->setStyleSheet("border:1px solid black"); 
    // mImageWidget->setGeometry(1,1,798,350); 
} 
class RecentImage : public QMainWindow 
{ 
    Q_OBJECT 
public: 
    explicit RecentImage(QWidget *parent = 0); 
    void createScrollArea(); 
signals: 

public slots: 

private: 
    QWidget *mWidget1,*mWidget2; 
    QHBoxLayout *mHlayout; 
    QScrollArea *mScrollArea; 

}; 

RecentImage::RecentImage(QWidget *parent) : 
    QMainWindow(parent), 
    mWidget1(NULL), 
    mWidget2(NULL), 
    mHlayout(NULL), 
    mScrollArea(NULL) 
{ 
    createScrollArea(); 
} 
void RecentImage::createScrollArea() 
{ 
    QHBoxLayout *vLayout = new QHBoxLayout(); 
    QScrollArea *scrollArea = new QScrollArea(); 
    //scrollArea->setWidgetResizable(true); 
    QWidget *widget = new QWidget(); 
    widget->setGeometry(0,200,600,150); 
    widget->setStyleSheet("border:1px solid black"); 
    QHBoxLayout *vLayout2 = new QHBoxLayout(widget); 
    scrollArea->setWidget(widget); 
    vLayout->addWidget(scrollArea); 
    setCentralWidget(scrollArea); 

    for (int i = 0; i < 20; i++) { 
     QWidget *widget = new QWidget(); 
     vLayout2->addWidget(widget); 
    } 
    show(); 
} 

Answer 1

在菜单栏的构造函数创建一个布局的框架和小部件添加到它是这样的：

QHBoxLayout *layoutMain(new QHBoxLayout()); 
QFrame *frmMain(new QFrame(this)); 

mview = new CameraView(this); 
mImage = new RecentImage(this); 

layout->addWidget(mview); 
layout->addWidget(mImage); 

frmMain->setLayout(layoutMain); 

setCentralWidget(frmMain); 

resize(800,600); 
CrateAction(); 
CreateStatusbar();