How can I programmatically make a dialog as small as possible?

[jdent]

Hi,

I have a dialog class drawn all from code - not using ui files. I want to resize it to the smallest dimensions that will still show the contained widgets. I have this in my constructor:

QVBoxLayout* layout = new QVBoxLayout;
    layout->addWidget(inputWidgetBox);
    layout->addWidget(buttonBox);
    setLayout(layout);

I thought adding this would accomplish my intentions:

    layout->setSizeConstraint(QLayout::SetMinimumSize);

But it does not.
There must be a function somewhere to make the dialog as small as possible!! Which is it?
I can resize it with my mouse and see there is a minimum - that's what I want!

Regards,
Juan

[mpergand]

@JonB said in How can I programmatically make a dialog as small as possible?:

dialog->resize(minimumSize()) does that work?

Works for me if resized after show();

[Ronel_qtmaster]

@jdent use resize(width, height)

[JonB]

@jdent said in How can I programmatically make a dialog as small as possible?:

layout->setSizeConstraint(QLayout::SetMinimumSize);

If this were to work at all it would actually need to be SetMaximumSize!

But I think doing it on a layout won't achieve anything. I think you need to do it on the widget, i.e. the QDialog.

I'll be honest and say that after years I still don't get layouts & sizes & size policies! :( If you do something like dialog->resize(1, 1) or dialog->resize(minimumSize()) does that work?

[jdent]

@Ronel_qtmaster Not exactly what I am looking for. I want the dialog to be as small as possible. Can I query the widgets to find their size? and perhaps add the sizes to obtain the minimum size?
how can I iterate over all the children of a QWidget? maybe this could help...

[mpergand]

@JonB said in How can I programmatically make a dialog as small as possible?:

dialog->resize(minimumSize()) does that work?

Works for me if resized after show();

[jdent]

@mpergand This works!! Thank you!!
Also resize(1,1) also works!

Great!