[Qt-interest] remove QSplitter children / disable splitter dragging.

[Brad Howes]

On Oct 22, 2009, at 3:48 AM, Thomi Richards wrote:

> I'm trying to build a UI that contains a QSplitter with two child
> widgets (one on each side). Under normal operations, the user can
> interact with this QSplitter as you would expect. However, I want a
> toggle button that hides / removes one of the two children of the
> splitter, and only shows the one remaining widget.
>
> Right now I'm simply calling "childWidget->hide()" when this mode is
> enabled. However, the splitter can still be moved, which looks very
> odd, since one side of the splitter is showing nothing.


Here's what I did, though it may be overkill for Qt4. I have a class  
called Splittable that is derived from QStackedWidget (!). In the  
Splittable interface, there is a split() slot that will split a view  
in two -- I support infinite levels of splitting, each new view can  
subsequently be split in two. The split() method takes a  
Qt::Orientation value, the new QWidget object to show in the split  
view. There is also a slot called unsplitWith() with takes the object  
to keep after the unsplit.

So, why QStackedWidget? Because in some old Qt (3?) release, I had  
widget (re)parenting issues. Using QStackedWidget saved me from this  
by allowing me to have two views for a QWidget object: one in which it  
owns the whole area, and another in which it is one part of a  
QSplitter view. When unsplit, I simply invoke  
QStackedWidget::removeWidget() with the QSplitter object I am  
removing, and voila! I have the original QWidget view immediately  
available.

I can send you the Splitter class code if you want. It is very small.

Brad

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Brad Howes
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