layout in widget give me an empty window!

[rimie23]

thank you for repling

If you want assistance with code it helps if you post complete copy-and-paste chunks or, better still, a self-contained complete program that shows the problem

If you want assistance with code it helps if you post complete copy-and-paste chunks or, better still, a self-contained complete program that shows the problem

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i did not copy all the code because it have not relation of this problem (it is not in qt ) i know that because my program work very well when i just make that

void QWidget::setViewNum(int num)
{
if(num == 1)
     {
    QVBoxLayout *mVerticalLayout;
    QSplitter *Splitter = new QSplitter(this);
    Splitter->setOrientation(Qt::Vertical);
    mVerticalLayout->addWidget(Splitter);
 
    QRenderWindow *orw = new QRenderWindow(Splitter);
    mQRenderWindowList.append(orw);
    Splitter->addWidget(orw);
}
}

void QWidget::setViewNum(int num)
{
if(num == 1)
     {
    QVBoxLayout *mVerticalLayout;
    QSplitter *Splitter = new QSplitter(this);
    Splitter->setOrientation(Qt::Vertical);
    mVerticalLayout->addWidget(Splitter);
     
    QRenderWindow *orw = new QRenderWindow(Splitter);
    mQRenderWindowList.append(orw);
    Splitter->addWidget(orw);
}
}

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and QRenderWindow is like that

QRenderWindow::QRenderWindow(QWidget *parent) :   QWidget(parent)

QRenderWindow::QRenderWindow(QWidget *parent) :   QWidget(parent)

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and in mainwindow i make like that

MainWindow::MainWindow()
{
 mQWidget = new QWidget(this);
    setCentralWidget(mQWidget);

MainWindow::MainWindow()
{
 mQWidget = new QWidget(this);
    setCentralWidget(mQWidget);

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all that work good i can see my object in the splitter

But when i want use groupbox that do not work (i see just an empty window, you can see my code in the firt or the second post )

I hope that what i write now it help you to see where is my problem exactelly

[Jonny174]

QWidget *central = new QGroupBox("My Scene", this);
 
QOgreRenderWindow *orw = new QOgreRenderWindow(central);
 
QHBoxLayout *mVerticalLayout = new QHBoxLayout(central);
mVerticalLayout->addWidget(orw);

QWidget *central = new QGroupBox("My Scene", this);
 
QOgreRenderWindow *orw = new QOgreRenderWindow(central);
 
QHBoxLayout *mVerticalLayout = new QHBoxLayout(central);
mVerticalLayout->addWidget(orw);

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[rimie23]

thanks Jonny
But it dos not work it still empty window

[amleto]

thank you for repling

If you want assistance with code it helps if you post complete copy-and-paste chunks or, better still, a self-contained complete program that shows the problem

If you want assistance with code it helps if you post complete copy-and-paste chunks or, better still, a self-contained complete program that shows the problem

To copy to clipboard, switch view to plain text mode 

i did not copy all the code because it have not relation of this problem (it is not in qt ) i know that because my program work very well when i just make that

you will note that he said 'self-contained complete program' - this DOES NOT have to be your whole program - it should be a self-contained complete program. Comprendes?

thanks Jonny
But it dos not work it still empty window

how about you post a self-contained complete program that doesnt work, and we will help with what is wrong.

I never trust anyone that says 'it doesn't work' when they have not shown us *what* doesnt work.

[rimie23]

"it should be a self-contained complete program."
do not you mean all the program ?
because as exemple "QOgreRenderWindow" containd many things have not relation with qt

Sory than what you mean by " self-contained complete program"

Edit : i work with ogre+qt , if you can integrate ogre i have not problem to give you version (code) that work with splitter and do not work when i add the groupbox (if i understand good the
" " self-contained complete program" that mean program where you can execute it and you can't execute it if you have not ogre)
else if it's just code where i have qt look

Qogrewidget have this member

#ifndef QOGREWIDGET_H
#define QOGREWIDGET_H
 
#include <QWidget>
#include <QVBoxLayout>
#include <QSplitter>
#include <QList>
 
#include <OGRE/Ogre.h>
 
#include "QOgreRenderWindow.h"
 
class QOgreRenderWindow;
class QOgreWidget : public QWidget, public Ogre::FrameListener
{
    Q_OBJECT
 
public:
 
 
    QOgreWidget(QWidget *parent = 0);
    ~QOgreWidget();
	Ogre::Root  *mRoot;
  QHBoxLayout *mVerticalLayout;
 
    QList<QOgreRenderWindow*> getOgreWindows() { return mQOgreRenderWindowList; }
int nb_cam;
private:
        Ogre::RenderWindow *mRenderWindow;
    Ogre::SceneManager* mSceneMgr;
 
 
    QList<QOgreRenderWindow*> mQOgreRenderWindowList;
int mainProcessID;
    void init();
    void initResources();
    void createScene();
	void timerEvent(QTimerEvent* evt); 
protected:
    virtual bool frameStarted(const Ogre::FrameEvent& evt);
    virtual bool frameEnded(const Ogre::FrameEvent& evt);
 
 
    virtual void showEvent(QShowEvent *evt);
 
 
 
 
public slots:
 
    void setViewNum(int num);
 
private:
	Ogre::Vector3 cPosition;  
	Ogre::Entity* ogreCube;
	Ogre::SceneNode* CubeNode;
};
 
#endif // QOGREWIDGET_H

#ifndef QOGREWIDGET_H
#define QOGREWIDGET_H

#include <QWidget>
#include <QVBoxLayout>
#include <QSplitter>
#include <QList>

#include <OGRE/Ogre.h>

#include "QOgreRenderWindow.h"

class QOgreRenderWindow;
class QOgreWidget : public QWidget, public Ogre::FrameListener
{
    Q_OBJECT

public:


    QOgreWidget(QWidget *parent = 0);
    ~QOgreWidget();
	Ogre::Root  *mRoot;
  QHBoxLayout *mVerticalLayout;

    QList<QOgreRenderWindow*> getOgreWindows() { return mQOgreRenderWindowList; }
int nb_cam;
private:
        Ogre::RenderWindow *mRenderWindow;
    Ogre::SceneManager* mSceneMgr;
	

    QList<QOgreRenderWindow*> mQOgreRenderWindowList;
int mainProcessID;
    void init();
    void initResources();
    void createScene();
	void timerEvent(QTimerEvent* evt); 
protected:
    virtual bool frameStarted(const Ogre::FrameEvent& evt);
    virtual bool frameEnded(const Ogre::FrameEvent& evt);


    virtual void showEvent(QShowEvent *evt);


	

public slots:
   
    void setViewNum(int num);

private:
	Ogre::Vector3 cPosition;  
	Ogre::Entity* ogreCube;
	Ogre::SceneNode* CubeNode;
};

#endif // QOGREWIDGET_H

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QOgreWidget::QOgreWidget(QWidget *parent) :
    QWidget(parent),
 
   mSceneMgr(NULL)
{
 
    mRenderWindow = NULL;
 
      mVerticalLayout = new  QHBoxLayout(this);
	}void QOgreWidget::setViewNum(int num)
{
    for(int i = 0;i<mQOgreRenderWindowList.count();i++)
    {
        delete mQOgreRenderWindowList.takeAt(i);
        i--;
    }
 
    for(int i = 0; i<mVerticalLayout->count();i++)
    {
        delete mVerticalLayout->takeAt(i);
        i--;
    }
 
     if(num == 1)
     {
		         /* QWidget *central = new QGroupBox("My Scene", this);  
                     
      
              
             mQOgreRenderWindowList.append(orw);  
              
             mVerticalLayout->addWidget(central);  
             mVerticalLayout->addWidget(orw); */QOgreRenderWindow * orw = new QOgreRenderWindow(QString("View1"),mSceneMgr,mRoot,nb_cam/*,central*/); 
		 mVerticalLayout->addWidget(orw);
  QWidget *central = new QGroupBox("My Scene",orw);
 // mVerticalLayout->addWidget(central);
central->setLayout(mVerticalLayout);
     }
 
//////////////////////
all the code here has relation with ogre not with qt
///////////////////////
void QOgreWidget::setViewNum(int num)//It is slot
{
 
    QSplitter *Splitter = new QSplitter(this);
    Splitter->setOrientation(Qt::Vertical);
    mVerticalLayout->addWidget(Splitter);
 
    QRenderWindow *orw = new QRenderWindow(Splitter);
    mQRenderWindowList.append(orw);
    Splitter->addWidget(orw);
 if(num == 4)
    {
 
       QSplitter *Splitter = new QSplitter(this);
        Splitter->setOrientation(Qt::Vertical);
	        QSplitter *Splitter2 = new QSplitter(Splitter);
        Splitter2->setOrientation(Qt::Horizontal);
 
        Splitter->addWidget(Splitter2);
 
        QSplitter *Splitter3 = new QSplitter(Splitter);
        Splitter3->setOrientation(Qt::Horizontal);
 
        Splitter->addWidget(Splitter3);
 
        mVerticalLayout->addWidget(Splitter);
 
        QOgreRenderWindow *orw = new QOgreRenderWindow(Splitter2);
        mQOgreRenderWindowList.append(orw);
        Splitter2->addWidget(orw);
 
        orw = new QOgreRenderWindow(Splitter3);
        mQOgreRenderWindowList.append(orw);
        Splitter3->addWidget(orw);
 
        orw = new QOgreRenderWindow(Splitter3);
        mQOgreRenderWindowList.append(orw);
        Splitter3->addWidget(orw);
 
        orw = new QOgreRenderWindow(Splitter3);
        mQOgreRenderWindowList.append(orw);
        Splitter3->addWidget(orw);
 
 
    }
}

QOgreWidget::QOgreWidget(QWidget *parent) :
    QWidget(parent),
 
   mSceneMgr(NULL)
{

    mRenderWindow = NULL;

      mVerticalLayout = new  QHBoxLayout(this);
	}void QOgreWidget::setViewNum(int num)
{
    for(int i = 0;i<mQOgreRenderWindowList.count();i++)
    {
        delete mQOgreRenderWindowList.takeAt(i);
        i--;
    }

    for(int i = 0; i<mVerticalLayout->count();i++)
    {
        delete mVerticalLayout->takeAt(i);
        i--;
    }

     if(num == 1)
     {
		         /* QWidget *central = new QGroupBox("My Scene", this);  
                     
      
              
             mQOgreRenderWindowList.append(orw);  
              
             mVerticalLayout->addWidget(central);  
             mVerticalLayout->addWidget(orw); */QOgreRenderWindow * orw = new QOgreRenderWindow(QString("View1"),mSceneMgr,mRoot,nb_cam/*,central*/); 
		 mVerticalLayout->addWidget(orw);
  QWidget *central = new QGroupBox("My Scene",orw);
 // mVerticalLayout->addWidget(central);
central->setLayout(mVerticalLayout);
     }

//////////////////////
all the code here has relation with ogre not with qt
///////////////////////
void QOgreWidget::setViewNum(int num)//It is slot
{

    QSplitter *Splitter = new QSplitter(this);
    Splitter->setOrientation(Qt::Vertical);
    mVerticalLayout->addWidget(Splitter);
     
    QRenderWindow *orw = new QRenderWindow(Splitter);
    mQRenderWindowList.append(orw);
    Splitter->addWidget(orw);
 if(num == 4)
    {
		
       QSplitter *Splitter = new QSplitter(this);
        Splitter->setOrientation(Qt::Vertical);
	        QSplitter *Splitter2 = new QSplitter(Splitter);
        Splitter2->setOrientation(Qt::Horizontal);
		
        Splitter->addWidget(Splitter2);

        QSplitter *Splitter3 = new QSplitter(Splitter);
        Splitter3->setOrientation(Qt::Horizontal);
		
        Splitter->addWidget(Splitter3);
		
        mVerticalLayout->addWidget(Splitter);
		
        QOgreRenderWindow *orw = new QOgreRenderWindow(Splitter2);
        mQOgreRenderWindowList.append(orw);
        Splitter2->addWidget(orw);
		
        orw = new QOgreRenderWindow(Splitter3);
        mQOgreRenderWindowList.append(orw);
        Splitter3->addWidget(orw);

        orw = new QOgreRenderWindow(Splitter3);
        mQOgreRenderWindowList.append(orw);
        Splitter3->addWidget(orw);
		
        orw = new QOgreRenderWindow(Splitter3);
        mQOgreRenderWindowList.append(orw);
        Splitter3->addWidget(orw);
		

    }
}

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the class QOGRERENDERWINDOW

#ifndef QOGRERENDERWINDOW_H
#define QOGRERENDERWINDOW_H
 
#include <QWidget>
#include <QPaintEngine>
#include <QPaintEvent>
#include <QResizeEvent>
 
#include <OGRE/Ogre.h>
#include "my_interface.h"
 
class QOgreRenderWindow : public QWidget
{
    Q_OBJECT
public:
 
 
    QOgreRenderWindow(QWidget *parent = 0);
    ~QOgreRenderWindow();
 
 
 
private:
    QString mWindowName;
    Ogre::SceneManager* mSceneMgr;
    Ogre::RenderWindow* mRenderWindow;
    Ogre::Camera *mCamera;
    int nb_cam;
    Ogre::Viewport* mVp;
   Ogre::Root *mRoot;
    void init();
	void createOrbitalCamera();
 
protected:
    virtual QPaintEngine* paintEngine() const { return 0; }
    virtual void paintEvent(QPaintEvent* evt);
    virtual void resizeEvent(QResizeEvent* evt);
    virtual void keyPressEvent(QKeyEvent* evt);
    virtual void keyReleaseEvent(QKeyEvent* evt);
 
    virtual void mouseReleaseEvent(QMouseEvent* evt);
 
    virtual void wheelEvent(QWheelEvent * evt);
};
 
#endif // QOGRERENDERWINDOW_H

#ifndef QOGRERENDERWINDOW_H
#define QOGRERENDERWINDOW_H

#include <QWidget>
#include <QPaintEngine>
#include <QPaintEvent>
#include <QResizeEvent>

#include <OGRE/Ogre.h>
#include "my_interface.h"

class QOgreRenderWindow : public QWidget
{
    Q_OBJECT
public:
   

    QOgreRenderWindow(QWidget *parent = 0);
    ~QOgreRenderWindow();

  

private:
    QString mWindowName;
    Ogre::SceneManager* mSceneMgr;
    Ogre::RenderWindow* mRenderWindow;
    Ogre::Camera *mCamera;
    int nb_cam;
    Ogre::Viewport* mVp;
   Ogre::Root *mRoot;
    void init();
	void createOrbitalCamera();
    
protected:
    virtual QPaintEngine* paintEngine() const { return 0; }
    virtual void paintEvent(QPaintEvent* evt);
    virtual void resizeEvent(QResizeEvent* evt);
    virtual void keyPressEvent(QKeyEvent* evt);
    virtual void keyReleaseEvent(QKeyEvent* evt);
   
    virtual void mouseReleaseEvent(QMouseEvent* evt);
   
    virtual void wheelEvent(QWheelEvent * evt);
};

#endif // QOGRERENDERWINDOW_H

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on mainwindow

MainWindow::MainWindow()
{
 mQOgreWidget = new QOgreWidget(this);
 
    setCentralWidget(mQOgreWidget);
}
void MainWindow::setViewNum(int num)
{
    mQOgreWidget->setViewNum(num);
 
}

MainWindow::MainWindow()
{
 mQOgreWidget = new QOgreWidget(this);

    setCentralWidget(mQOgreWidget);
}
void MainWindow::setViewNum(int num)
{
    mQOgreWidget->setViewNum(num);

}

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in main

int main(int argc, char **argv)
{
    QApplication app(argc, argv);
    MainWindow window;
    window.show();
	window.setViewNum(1);
    return app.exec();
}

int main(int argc, char **argv)
{
    QApplication app(argc, argv);
    MainWindow window;
    window.show();
	window.setViewNum(1);
    return app.exec();
}

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that all my code that he has not relation with ogre (the rest is in ogre , c++) , that code with the code in ogre the result is an object in window (splitter ) or 4 view in each view i see my object
if i add groupbox(with the code in my first reply ) i do not see the object

I hope with this code i give you"self-contained complete program" (and i said to you i can give you version of my program with ogre)

[amleto]

self contained + complete - means you show ALL code from an EXAMPLE program that has the *same* problem. You do *not* need ogre to show any problem with widgets and layouts.

As nobody can copy + paste your code and make it compile (with suitable pro file), then no, your code is not complete. Ogre has nothing at all to do with a problem with a groupbox. Make your example much simpler without any ogre.