QGLWidget problem

[MarkoSan]

Hello to all!

I've been trying for whole day to make following demand work:

I have a QDockWidget on QMainWIndow. In this QDockWIdget I want to have an QGLWidgeet containing some animation and beneath in horiz layout two QPushButtons.

I wrote following code:

COperationWIndow::COperationWIndow(QWidget* pParent) : QDockWidget(pParent)
{
    //setAllowedAreas(Qt::LeftDockWidgetArea);    // sets allowed dock area
    setWindowTitle(trUtf8("Izbor ponudbe jedi in pijač"));    // sets window title
 
    // layout creation
    m_pVLayout=new QVBoxLayout(this);    // creates new vertical layout
    Q_CHECK_PTR(m_pVLayout);    // checks creation
    m_pHLayout=new QHBoxLayout(this);    // creates new horizontal layout
    Q_CHECK_PTR(m_pHLayout);    // checks creation
 
    // creates merchandize browser
    m_pMerchandizeBrowser=new CMerchandizeBrowser(this);    // creates new merchandize selector
    //m_pMerchandizeBrowser=new CMerchandizeBrowser(pParent);    // creates new merchandize selector
    Q_CHECK_PTR(m_pMerchandizeBrowser);    // checks creation
    m_pVLayout->addWidget(m_pMerchandizeBrowser);    // adds merchandize selector to vertical layout
 
    // creates Left Selector pushbutton
    m_pLeftButtonMerchandizeSelector=new QPushButton(trUtf8("Izbira levega artikla"), this);
    //m_pLeftButtonMerchandizeSelector=new QPushButton(trUtf8("Izbira levega artikla"), pParent);
    Q_CHECK_PTR(m_pLeftButtonMerchandizeSelector);    // checks creation
 
    // creates Right Selector pushbutton
    m_pRightButtonMerchandizeSelector=new QPushButton(trUtf8("Izbira desnegs artikla"), this);
    //m_pRightButtonMerchandizeSelector=new QPushButton(trUtf8("Izbira desnegs artikla"), pParent);
    Q_CHECK_PTR(m_pRightButtonMerchandizeSelector);    // checks creation
 
    m_pHLayout->addWidget(m_pLeftButtonMerchandizeSelector);    // adds button to horiz. layout
    m_pHLayout->addWidget(m_pRightButtonMerchandizeSelector);    // adds button to horiz. layout
 
    m_pVLayout->addLayout(m_pHLayout);    // add horiz. layout to vertical layout
    setLayout(m_pVLayout);    // sets main layout on widget
    setLayout(m_pHLayout);    // sets main layout on widget
    //setWidget(m_pMerchandizeBrowser);
}

COperationWIndow::COperationWIndow(QWidget* pParent) : QDockWidget(pParent)
{
    //setAllowedAreas(Qt::LeftDockWidgetArea);    // sets allowed dock area
    setWindowTitle(trUtf8("Izbor ponudbe jedi in pijač"));    // sets window title
    
    // layout creation
    m_pVLayout=new QVBoxLayout(this);    // creates new vertical layout
    Q_CHECK_PTR(m_pVLayout);    // checks creation
    m_pHLayout=new QHBoxLayout(this);    // creates new horizontal layout
    Q_CHECK_PTR(m_pHLayout);    // checks creation
    
    // creates merchandize browser
    m_pMerchandizeBrowser=new CMerchandizeBrowser(this);    // creates new merchandize selector
    //m_pMerchandizeBrowser=new CMerchandizeBrowser(pParent);    // creates new merchandize selector
    Q_CHECK_PTR(m_pMerchandizeBrowser);    // checks creation
    m_pVLayout->addWidget(m_pMerchandizeBrowser);    // adds merchandize selector to vertical layout
        
    // creates Left Selector pushbutton
    m_pLeftButtonMerchandizeSelector=new QPushButton(trUtf8("Izbira levega artikla"), this);
    //m_pLeftButtonMerchandizeSelector=new QPushButton(trUtf8("Izbira levega artikla"), pParent);
    Q_CHECK_PTR(m_pLeftButtonMerchandizeSelector);    // checks creation

    // creates Right Selector pushbutton
    m_pRightButtonMerchandizeSelector=new QPushButton(trUtf8("Izbira desnegs artikla"), this);
    //m_pRightButtonMerchandizeSelector=new QPushButton(trUtf8("Izbira desnegs artikla"), pParent);
    Q_CHECK_PTR(m_pRightButtonMerchandizeSelector);    // checks creation

    m_pHLayout->addWidget(m_pLeftButtonMerchandizeSelector);    // adds button to horiz. layout
    m_pHLayout->addWidget(m_pRightButtonMerchandizeSelector);    // adds button to horiz. layout
    
    m_pVLayout->addLayout(m_pHLayout);    // add horiz. layout to vertical layout
    setLayout(m_pVLayout);    // sets main layout on widget
    setLayout(m_pHLayout);    // sets main layout on widget
    //setWidget(m_pMerchandizeBrowser);
}

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but this does not work. QGLWidget is not even seen, both qpushbuttons are located in the left upper corner one behind other. What the heck is going on???!!

[jacek]

setLayout(m_pVLayout); // sets main layout on widget
setLayout(m_pHLayout); // sets main layout on widget

You can't set the layout twice.

[MarkoSan]

I've commented the line:

setLayout(m_pHLayout);    // sets main layout on widget

setLayout(m_pHLayout);    // sets main layout on widget

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and I get same result.

[high_flyer]

That is actually an interesting point - since I don't have the time to make a test program, can you answer me quick jacek, as to how does the implementation looks like when I have two layouts on a widget lets say one V box and one H box with buttons in them, all done by designer?
Will designer generate a third layout manager to inlcude the ones I added?

[high_flyer]

and I get same result.

Thats because only one layout is visible.
You need to create one layout that will include the other two.
And set the that layout (which includes the others) to the widget.

[MarkoSan]

I've created two layouts, as is seen from code. Vertical layout is main layout, since in this layout in the upper region should be qglwidget, and beneath the qglwidget should be in horizontal layoout two push buttons.

[high_flyer]

in that case so include the horizontal laout in the vertical one, and set the vertical as the main layout (as you did).

[MarkoSan]

I did that, but I still get same result.

[high_flyer]

can you show your current code?

[MarkoSan]

Here is it:

#include "COperationWIndow.h"
 
COperationWIndow::COperationWIndow(QWidget* pParent) : QDockWidget(pParent)
{
    //setAllowedAreas(Qt::LeftDockWidgetArea);    // sets allowed dock area
    setWindowTitle(trUtf8("Izbor ponudbe jedi in pijač"));    // sets window title
 
    // layout creation
    m_pVLayout=new QVBoxLayout(this);    // creates new vertical layout
    Q_CHECK_PTR(m_pVLayout);    // checks creation
    m_pHLayout=new QHBoxLayout(this);    // creates new horizontal layout
    Q_CHECK_PTR(m_pHLayout);    // checks creation
 
    // creates merchandize browser
    m_pMerchandizeBrowser=new CMerchandizeBrowser(this);    // creates new merchandize selector
    //m_pMerchandizeBrowser=new CMerchandizeBrowser(pParent);    // creates new merchandize selector
    Q_CHECK_PTR(m_pMerchandizeBrowser);    // checks creation
    m_pVLayout->addWidget(m_pMerchandizeBrowser);    // adds merchandize selector to vertical layout
 
    // creates Left Selector pushbutton
    m_pLeftButtonMerchandizeSelector=new QPushButton(trUtf8("Izbira levega artikla"), this);
    //m_pLeftButtonMerchandizeSelector=new QPushButton(trUtf8("Izbira levega artikla"), pParent);
    Q_CHECK_PTR(m_pLeftButtonMerchandizeSelector);    // checks creation
 
    // creates Right Selector pushbutton
    m_pRightButtonMerchandizeSelector=new QPushButton(trUtf8("Izbira desnegs artikla"), this);
    //m_pRightButtonMerchandizeSelector=new QPushButton(trUtf8("Izbira desnegs artikla"), pParent);
    Q_CHECK_PTR(m_pRightButtonMerchandizeSelector);    // checks creation
 
    m_pHLayout->addWidget(m_pLeftButtonMerchandizeSelector);    // adds button to horiz. layout
    m_pHLayout->addWidget(m_pRightButtonMerchandizeSelector);    // adds button to horiz. layout
 
    m_pVLayout->addLayout(m_pHLayout);    // add horiz. layout to vertical layout
    setLayout(m_pVLayout);    // sets main layout on widget
}
 
COperationWIndow::~COperationWIndow()
{
}

#include "COperationWIndow.h"

COperationWIndow::COperationWIndow(QWidget* pParent) : QDockWidget(pParent)
{
    //setAllowedAreas(Qt::LeftDockWidgetArea);    // sets allowed dock area
    setWindowTitle(trUtf8("Izbor ponudbe jedi in pijač"));    // sets window title
    
    // layout creation
    m_pVLayout=new QVBoxLayout(this);    // creates new vertical layout
    Q_CHECK_PTR(m_pVLayout);    // checks creation
    m_pHLayout=new QHBoxLayout(this);    // creates new horizontal layout
    Q_CHECK_PTR(m_pHLayout);    // checks creation
    
    // creates merchandize browser
    m_pMerchandizeBrowser=new CMerchandizeBrowser(this);    // creates new merchandize selector
    //m_pMerchandizeBrowser=new CMerchandizeBrowser(pParent);    // creates new merchandize selector
    Q_CHECK_PTR(m_pMerchandizeBrowser);    // checks creation
    m_pVLayout->addWidget(m_pMerchandizeBrowser);    // adds merchandize selector to vertical layout
        
    // creates Left Selector pushbutton
    m_pLeftButtonMerchandizeSelector=new QPushButton(trUtf8("Izbira levega artikla"), this);
    //m_pLeftButtonMerchandizeSelector=new QPushButton(trUtf8("Izbira levega artikla"), pParent);
    Q_CHECK_PTR(m_pLeftButtonMerchandizeSelector);    // checks creation

    // creates Right Selector pushbutton
    m_pRightButtonMerchandizeSelector=new QPushButton(trUtf8("Izbira desnegs artikla"), this);
    //m_pRightButtonMerchandizeSelector=new QPushButton(trUtf8("Izbira desnegs artikla"), pParent);
    Q_CHECK_PTR(m_pRightButtonMerchandizeSelector);    // checks creation

    m_pHLayout->addWidget(m_pLeftButtonMerchandizeSelector);    // adds button to horiz. layout
    m_pHLayout->addWidget(m_pRightButtonMerchandizeSelector);    // adds button to horiz. layout
    
    m_pVLayout->addLayout(m_pHLayout);    // add horiz. layout to vertical layout
    setLayout(m_pVLayout);    // sets main layout on widget
}

COperationWIndow::~COperationWIndow()
{
}

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[high_flyer]

@MarkoSan:
What happens if you do:

m_pHLayout=new QHBoxLayout(m_pVLayout);

m_pHLayout=new QHBoxLayout(m_pVLayout);

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Ah no... QLayout is not a widget...
Hmm I need to look this up...

@jacek:

and you always have a single top-level layout.

No, when you use designer, you can have multiple "flowing" layouts on one widget, which is why I asked my question.

[jacek]

you can have multiple "flowing" layouts on one widget, which is why I asked my question.

These "flowing layouts" are QWidgets. In such case the main widget doesn't have any layouts set.

[high_flyer]

These "flowing layouts" are QWidgets. In such case the main widget doesn't have any layouts set.

Well, not according to the designer object browser on the right.
Try it:
Place 4 buttons on a widget.
Select 2 of the buttons, and but them in a VBox layout.
The other 2 on a another layout.
No new widgets are to be seen on the object manager.
That was my question - how designer implements this case.
But I find it hard to beive that it create a new widgets for the layouts...
See image.

[jacek]

how does the implementation looks like when I have two layouts on a widget lets say one V box and one H box with buttons in them, all done by designer?

You can add a layout to another one, just like you do with widgets, and you always have a single top-level layout.