Cannot stop controls resizing

elpidiovaldez5

I am trying to fix the size of some controls in a widget. Unfortunately nothing I do stops them from re-sizing.
The code is for a widget that contains a linked text box and slider for inputting a numeric value. I set the size policy to fixed on everything I can think of. What is the problem ?

The widget is embedded in a widget with a QFormLayout, and this is inside a QScrollArea. I notice that the scrollbars never appear. Instead the contents of the form shrink.

@
class DynamicDataSlider : public QWidget {
Q_OBJECT

public:
IntRange *param;
QSlider *slider;
QLineEdit *text;

DynamicDataSlider(IntRange *p) {
param = p;

text = new QLineEdit();
text->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);

QObject::connect(text, SIGNAL(editingFinished()), this, SLOT(setSliderValue()));

slider = new QSlider(Qt::Horizontal);
slider->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
slider->setRange(param->min, param->max);
slider->setValue(param->defaultValue);
slider->setTracking(true);
QObject::connect(slider, SIGNAL(valueChanged(int)), this, SLOT(setTextBoxValue(int)));

QHBoxLayout *layout = new QHBoxLayout();

setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);

layout->addWidget(text);
layout->addWidget(slider);

setLayout(layout);

emit setTextBoxValue(param->defaultValue);

}

public slots:

void setTextBoxValue(int val) {
param->setValue(val);
QString str;
str.setNum(val);
text->setText(str);
}

void setSliderValue() {
int newVal = text->displayText().toInt();
slider->setSliderPosition(newVal);
}

};
@