Add AnalogClock widget into BoxLayout

YDLU

Hi
I am new Qt developer, try to learn from examples.

I try add "AnalogClock" widget, from http://cartan.cas.suffolk.edu/qtdocs/widgets-analogclock.html , to a QHBoxLayout or QVBoxLayout. Run the example was no problem. But the "Clock" widget can NOT show on the "BoxLayout".

Why? or something I need do?

Thanks
YDLU

andre

Please show us the code you produced?

giesbert

What might be the problem here, is that the widget has no size hint and no minimum size hint.
I would add that, it should fix the problem.

YDLU

the main.cpp code:
I try to added a "Current time on top window and clock on rest of window. And try to learn how to custom a widget.

Thanks
Lu

@
////////////////////////////////////////////////////

#include <QApplication>
#include <QtGui>

#include "analogclock.h"

int main(int argc, char* argv[])
{
QApplication app(argc, argv);

// main window
QWidget* window = new QWidget;
// main layout
QVBoxLayout* mainLayout = new QVBoxLayout();

// tow layouts in main layout
QHBoxLayout* hLayout = new QHBoxLayout;
QVBoxLayout* vLayout = new QVBoxLayout;

// add current time on top of window
qDebug() << QTime::currentTime().toString();
QLabel* label = new QLabel("<H2>"+QTime::currentTime().toString()+"</H2>");
label->setAlignment(Qt::AlignHCenter | Qt::AlignVCenter);

// a test widget
QDial* dial = new QDial();
dial->setRange(0, 120);
dial->setWrapping(true);
dial->setValue(0);

// add clock widget on V layout
AnalogClock* clock = new AnalogClock();
//clock->show();
vLayout->addWidget(clock);

hLayout->addWidget(label);
vLayout->addWidget(dial);

mainLayout->addLayout(hLayout);
mainLayout->addLayout(vLayout);

window->setLayout(mainLayout);

window->show();

return app.exec&#40;&#41;;

}
@

Edit: added @ tags around your code. Please do that yourself next time, so the code becomes more readable; Andre

goetz

You can see the analog clock once you enlarge the window manually.

The cause for the "invisible" clock is that it does not provide a size hint. Add this to your clock class and it works as expected:

@
// in the header file:
public:
QSize sizeHint() const;

// in the implementation:
QSize AnalogClock::sizeHint() const
{
return QSize(100, 100);
}
@

Just another hint, your hLayout and vLayout is not neede, it is sufficient to put all your widgets into the main layout like this:

@
mainLayout->addWidget(label);
mainLayout->addWidget(clock);
mainLayout->addWidget(dial);
@