[Solved] Resize QDialog to fit all contents?

CAD_coding

Hi,
I have a QDialog subclass in which there is a vertical layout.
There are 3 widgets aligned vertically inside it.
The middle widget is a QScrollArea to which I am setting a grid layout.
The grid layout contains QTableView objects which I am creating by code using the Model/View framework.
The number of QTableView in the grid layout is dynamic in the sense that user can change it through the UI.
By default the grid layout contains only 1 QTableView & the size of the dialog is sufficient to fit all the contents.
But when the user changes the number to 2 then the size of dialog is not changing to accommodate the 2 QTableView's.
As a result the QTableView are creating horizontal scroll bars, which I don't want.
I want the dialog to resize such that all the columns of all the QTableView's are always visible.
How do I do this?

CAD_coding

This issue is really bugging me.
Can I please have some guidance on this?

CAD_coding

It would really help me if somebody could answer this question?
Am I unclear in my question?

JKSH

Hi,

Calculate the "total width of all columns":http://qt-project.org/doc/qt-5.1/qtwidgets/qtableview.html#columnWidth, and then "resize your dialog":http://qt-project.org/doc/qt-5.1/qtwidgets/qwidget.html#size-prop accordingly.

Similarly, resize your dialog when the number of views is changed.

CAD_coding

Hi JKSH,
Thanks for your reply.
I think I totally missed that... ;)
But I was hoping something like QDialog::resizeToContents();

JKSH

You're welcome :)

resizeToContents() would create a circular dependency -- a child widget's size depends on its parent's size, so we can't make the parent's size depend on the child's size too.

CAD_coding

ohh...
Got it!

poketmonister

very similar problem i have a QTableWidget instead of a QTableView

and resizing QTableWidget to rows and columns does not increase QDialog size, only increases QTableWidget size.

help me increase QDialog size also

plz help me

Mar4eli

i can't now tell about qDialog, but there is "resizeToContents" with the help of the widget.

Create widget (for example: mainWidget);
specify widget layout;
add some additional widgets inside layout.
mainWidget."adjustSize()":http://qt-project.org/doc/qt-5/qwidget.html#adjustSize
Enjoy.

If it is necessary, i can post example code tomorrow.

DBoosalis

This might work:

Create your own class that inherits QTableView. Now QTableView has a protected virtual method it inherits from QAbstractScrollArea called viewportEvent ( QEvent * event ). I think you can can a contents resize event of the viewport judging by the 4.8 docs. So once you get the size you can emit a signal to the dialog to resize itself.

In the resizing of the QDialog you may need to disconnect or set a flags in our QTableview so as not to get the circular calling: QTable::resize->QDialog::resize->QTable::resize

poketmonister

hmmm....
Thanks for the reply, ill try it and post back

WolfgangGriech

I know it's more than 10 years later, but the same issue was bugging me now at some project, and I found a really easy solution:

just call 'resize(0,0)' for the QDialog widget itself, after setupUi() and after deleting (my case) or adding other widgets.

just saw that I forgot to mention a small detail, I also set the vertical size policy of the QDialog to 'minimum', but that on its own didn't do a thing...