[Qt-interest] QMainWindow and QDialog.

[Andreas Diehl]

Hello.
For a QMainWindow you have to set the central widget. Try adding
 
QWidget* centralWidget = new QWidget();
centralWidget->setLayout(mainLayout));
this->setCentralWidget(centralWidget);
 
instead of your "setLayout(mainLayout)" line.
 
A QMainWindow has a special central area for "normal" layouting. The surroundings are for QDockWidgets and QToolbars. Look at the QMainWindow reference, there's a picture explaining it.
 
Regards,
    Andreas


________________________________

	Von: qt-interest-bounces at trolltech.com [mailto:qt-interest-bounces at trolltech.com] Im Auftrag von Shabd Swarup V
	Gesendet: Donnerstag, 26. März 2009 14:07
	An: qt-interest at trolltech.com
	Betreff: [Qt-interest] QMainWindow and QDialog.
	
	

	Hi,

	 

	I have a class called Window which inherits from QMainWindow. Following is its constructor:

	 

	Window::Window(QWidget *parent)

	: QMainWindow(parent)

	{

	 

	tableWidget = new QTableWidget();

	treeWidget = new QTreeWidget();

	details = new QTextEdit("Gambler Details");

	addButton = createButton(tr("&Add"), SLOT(add()));

	editButton = createButton(tr("&Edit"), SLOT(edit()));

	graphicsView = new QGraphicsView();

	deleteButton = new QPushButton("Delete");

	QLabel *filterLabel = new QLabel("Filter Gambler");

	 

	QHBoxLayout *radioLayout = new QHBoxLayout;

	radioLayout->addWidget(filterLabel);

	 

	QVBoxLayout *buttonsLayout = new QVBoxLayout;

	buttonsLayout->addStretch();

	buttonsLayout->addWidget(addButton, Qt::AlignVCenter);

	buttonsLayout->addWidget(editButton, Qt::AlignVCenter);

	buttonsLayout->addWidget(deleteButton, Qt::AlignVCenter);

	 

	QGridLayout *mainLayout = new QGridLayout;

	mainLayout->addWidget(graphicsView, 0, 0, 1, 3);

	mainLayout->addWidget(treeWidget, 1, 0,3,1);

	mainLayout->addLayout(radioLayout, 1, 1,1,1);

	mainLayout->addWidget(tableWidget, 2, 1, 1, 1);

	mainLayout->addWidget(details, 3, 1, 1, 2);

	mainLayout->addLayout(buttonsLayout, 2, 2, 1, 1);

	setLayout(mainLayout);

	 

	setWindowTitle(tr("Gambler"));

	resize(800, 700);

	}

	 

	This displays a completely blank window. Although, if I make Window inherit from QDialog instead of QMainWindow, the widgets are displayed perfectly fine. 

	 

	Please suggest how I can make this work while keeping the base class as QMainWindow. 

	 

	Thanks,

	Shabd

	PS: This is my first Qt GUI app.
--
Mit freundlichen Grüßen
Andreas Diehl 
 
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