Problem adding QGLWidget to QGridLayout

[Marga]

Hello all,

I have a QGridLayout set up, where I insert my widgets. I have 3 widgets: QSplitter (dirBrowser), a QTextEdit (textView) and a QGLWidget (windowOpenGL). My code is the following:

void setupUi(QMainWindow *mainWindow)
{
	if (mainWindow->objectName().isEmpty())
	    mainWindow->setObjectName(QString::fromUtf8("mainWindow"));
	mainWindow->resize(800, 600);
 
	//grid layout
	gridLayout = new QGridLayout(); 
	layoutWidget = new QWidget(mainWindow);
	layoutWidget->setLayout(gridLayout);
	mainWindow->setCentralWidget(layoutWidget);
 
	//openGL window
	windowOpenGL = new GLWidget(mainWindow);
 
	//Splitter
	dirBrowser = new QSplitter(mainWindow);	//define the where the browsers will be contained
 
	//... here I add QListViews and QTreeViews to the splitter
 
	//Text view
	textView = new QTextEdit(mainWindow);
    	textView->setReadOnly(true);
 
    	gridLayout->addWidget(dirBrowser, 0, 0, 1, 1);
	gridLayout->addWidget(textView, 1, 0, 1, 1);
    	gridLayout->addWidget(windowOpenGL, 2, 0, 1, 1);
 
	// .. here there are some connects(...)
}

void setupUi(QMainWindow *mainWindow)
{
	if (mainWindow->objectName().isEmpty())
	    mainWindow->setObjectName(QString::fromUtf8("mainWindow"));
	mainWindow->resize(800, 600);

	//grid layout
	gridLayout = new QGridLayout(); 
	layoutWidget = new QWidget(mainWindow);
	layoutWidget->setLayout(gridLayout);
	mainWindow->setCentralWidget(layoutWidget);

	//openGL window
	windowOpenGL = new GLWidget(mainWindow);

	//Splitter
	dirBrowser = new QSplitter(mainWindow);	//define the where the browsers will be contained
	
	//... here I add QListViews and QTreeViews to the splitter

	//Text view
	textView = new QTextEdit(mainWindow);
    	textView->setReadOnly(true);
	    
    	gridLayout->addWidget(dirBrowser, 0, 0, 1, 1);
	gridLayout->addWidget(textView, 1, 0, 1, 1);
    	gridLayout->addWidget(windowOpenGL, 2, 0, 1, 1);

	// .. here there are some connects(...)
}

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Using this code as it is, the window does not display the OpenGL window. However, if I don't add the QTextEdit to the grid layout, it displays normally. The strange thing is that if instead of adding QTextEdit to the grid I add, for a example, a simple button, the OpenGL widget is displayed correctly as well.

What am I missing??? I would appreciate SO MUCH your help!!

Thanks in advance!

[Rachol]

Try if setting some small fixed size on QTextEdit object will help.

[Marga]

Hi Rachol,

Thanks!! I have tried setting the size on QTextEdit doing textView->resize(10,10), for example, and it does not work. However, I if a set a minimum height to the openGL window, it does appear on the screen!

I wonder why this happens with the QGLWidget... I haven't come across other situation where a widget is suddenly resized to size 0! What do you think?

Thanks a lot!!