[Qt-interest] QLayout Disaster (resizing)

[Scott Aron Bloom]

What you may want to consider...

Have a inner widget which has a fixed size policy, use all the layouts
you want.  But set the size policy of the widget to fixed, also set the
maximum size to the minimum size to the minimumSizeHint..
Then have an outer widget with a horizontal stretch to the right, and a
vertical stretch to below.

It should give you what you want

Scott

-----Original Message-----
From: qt-interest-bounces at trolltech.com
[mailto:qt-interest-bounces at trolltech.com] On Behalf Of Paul England
Sent: Monday, July 13, 2009 6:19 PM
To: qt-interest at trolltech.com
Subject: Re: [Qt-interest] QLayout Disaster (resizing)

Hi

Thanks for the response.

I'm mainly using the layouts to keep the widgets grouped.  I can't think

of an easier (not to mention more elegant) way coding wise to do it, 
considering each my_view_t has several widgets (a few QTableWidgets, a 
few QPushButtons, QLineEdits, and so on).  I'm not adverse to throwing 
them out entirely, but I don't want to have to keep up with the 
coordinates of each object... I'd have to calculate again where each one

goes for example when the font size is changed.

 >>fixed size layouts don't make a lot of sense

Interesting.  I'm curious as to why there's a SetFixedSize property in 
the QLayout namespace.  Although it's behavior definitely agrees with 
your philosophy.

Paul
> On 14.07.09 09:13:03, Paul England wrote:
>   
>> This is driving me nuts, so before I tinker any more I should make
sure 
>> what I'm trying to achieve is even possible.
>>
>> My application is a QDialog, which has quite a few nested 
>> QHBoxLayouts/QVBoxLayouts and other QWidgets (QPushButtons,
QLineEdits, 
>> and QTableWidgetItems for the most part).
>>
>> I set all of my Layouts to sizeConstraint to QLayout::SetFixedSize,
and 
>> I put in an stretch of -1.  The stretch works perfectly.  If the GUI
is 
>> resized to anything larger than the necessary space, everything stays

>> positioned (in the top left-hand corner).  However, when the GUI is 
>> resized to something smaller, the view_layout is definitely resized.

>> Each my_view_t within it keeps it's relative position (all of the 
>> widgets within it keep their relative spacing and sizng) but they
will 
>> overlap with each other.  So, if I have a QTableWidget within each 
>> my_view_t, if I resize the GUI small enough, I have 3 QTableWidgets 
>> overlapping one another.   This is obviously bad, and I can't figure
out 
>> exactly where I'm messing it up.  The desired effect would be that
the 
>> GUI simply resizes, but all the widgets inside are of a static size.
If 
>> the user only wants to "see" one of the my_view_t's, he just resizes
the 
>> window to the desired size.
>>     
>
> You're misusing layouts, fixed size layouts don't make a lot of sense,
you
> could just as well leave away the layouts and position your widgets
with
> absolute coordinates. This will also "fix" your current problems,
widgets
> that are outside of the smaller size will just be clipped.
>
> Andreas
>
>   

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