Qt Widgets appearing small on Main Window

[wysota]

The proper equivalent of your code is something like:

QLabel *label = new QLabel;
label->setPixmap(QPixmap(":/lena.jpg"));
QToolBar *toolbar = addToolBar("my tool bar");
toolbar->addAction(QIcon(":/Icons/new_file.png"), "load", this, SLOT(loadNewImage()));
// etc.
setCentralWidget(label);

QLabel *label = new QLabel;
label->setPixmap(QPixmap(":/lena.jpg"));
QToolBar *toolbar = addToolBar("my tool bar");
toolbar->addAction(QIcon(":/Icons/new_file.png"), "load", this, SLOT(loadNewImage()));
// etc.
setCentralWidget(label);

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