Fixed-size widget in a layout

[2r273gd]

Hi, I need to have a fixed-size widget in a layout and it isn't working that well. The simplified example would be:

@#include <QApplication>
#include <QMainWindow>
#include <QHBoxLayout>
#include <QTextEdit>
#include <QPushButton>

int main(int argc, char * * argv)
{
QApplication application(argc, argv);

QMainWindow mainWindow;

QWidget * const widget = new QWidget;
mainWindow.setCentralWidget(widget);

QHBoxLayout * const layout = new QHBoxLayout;
layout->setMargin(0);
layout->setSpacing(0);
widget->setLayout(layout);

QTextEdit * const textEdit = new QTextEdit;
layout->addWidget(textEdit);

QPushButton * const pushButton = new QPushButton("A");
pushButton->setFixedSize(25, 25);
layout->addWidget(pushButton);

mainWindow.show();

return application.exec();

}@

Which gives me some unexpected results:

!http://i.imgur.com/OzpG6M0.png!

Am I not supposed to put fixed-size widgets in layouts? Should I create my own class for every fixed-size widget I need and override sizeHint() method?

I'd be grateful if someone could clarify that for me.

[dheerendra]

You can do it. In general use the sizePolicy of Layout. This will help you to do the required thing. Set the sizePolicy of QPushButton to setSizePolicy(QSizePolicy::Fixed,QSizePolicy::Fixed). This should work. You don't have to sub-class.

[kpks]

I have a similar problem, only difference is I am using qtcreator 2.8.1;

I have 3 panels within the MainWindow, I want to set the relative size of the panels, the panel with start/quit button small, the status log button also small and the main instructions panel relatively large.

How do I do that?

[dheerendra]

As guidline, you can use the stretch factor while adding the widgets to layout and use the sizepolicy to handle your case.

If you can give your code snippet it would help. I can make it work and share you the piece of sample for you.

[2r273gd]

Unfortunately sizePolicy didn't do it. I added

@pushButton->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);@

to the previous code and the result is exactly the same.

As I understand it, sizePolicy relates to sizeHint, so for it to work I would have to subclass the widget and override the sizeHint() method like I said before. Am I wrong?

[kpks]

I had a similar issue with the QDial; I simply set the min/max sizes to be the same in QtCreator 2.8.1;

[Jeroentjehome]

Hi,
Try this one:
@
minimumSizeHint : const QSize
@
QWidget docs -> also set sizepolicy to something else then ignore. That should do the trick ;-)