drawing an unfixed line?

[tommy]

I leaned to use HBox and I was able to draw the lines I wanted.
I'd like to know how to draw a box around a widget on the screen. The below code draws a box but I can't make it to include anything.

QLabel *hDivider1 = new QLabel; 
hDivider1->setFrameStyle(QFrame::Box | QFrame::Sunken); 
hDivider1->setLineWidth(2);
 
clusterLayout->addWidget(hDivider1);

QLabel *hDivider1 = new QLabel; 
hDivider1->setFrameStyle(QFrame::Box | QFrame::Sunken); 
hDivider1->setLineWidth(2);

clusterLayout->addWidget(hDivider1);

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[jpn]

Install a layout on the frame and add widgets to it.

[tommy]

This is a good idea. However, I could really use a bit of help here. I don't know how to install a layout on the frame. Would you be able to provide a short example. I really appreciate it.

[jpn]

QVBoxLayout* frameLayout = new QVBoxLayout(hDivider);
frameLayout->addWidget(...);
frameLayout->addWidget(...);

QVBoxLayout* frameLayout = new QVBoxLayout(hDivider);
frameLayout->addWidget(...);
frameLayout->addWidget(...);

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[tommy]

This compiles fine but program crashes before it gets to graphics

MyWidget::MyWidget(QWidget* parent): QWidget(parent)
{
......
QLabel *box1 = new QLabel; 
box1->setFrameStyle(QFrame::Box | QFrame::Sunken);  box1->setLineWidth(2);
 
mainLayout = new QVBoxLayout(box1);//mainLayout is declared in my *.h file
mainLayout->addLayout(otherLayout);
......
}

MyWidget::MyWidget(QWidget* parent): QWidget(parent)
{
......
QLabel *box1 = new QLabel; 
box1->setFrameStyle(QFrame::Box | QFrame::Sunken);  box1->setLineWidth(2);

mainLayout = new QVBoxLayout(box1);//mainLayout is declared in my *.h file
mainLayout->addLayout(otherLayout);
......
}

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What could be the problem?
Is QLabel the reason? Using "QFrame *box1 = new QFrame;" will crash the program too.

[jpn]

Could "otherLayout" be an uninitialized pointer? I'd suggest using a debugger and seeing backtrace/callstack to get an idea which line is causing the crash.