[Qt-interest] QTree* with custom widgets

[Bernhard Friedreich]

> First. Please reply to the mailing list.
>
Sorry ... totally overlooked that..
>
>  
>
> Everything is trade off between the cost of development and 
> functionality which includes efficient memory handling and usability.
>
> You mentioned that it does not matter for you which widget to use.
>
> As for me this means that the data you need to display is relatively 
> small.
>
1.) it IS small (sthg. like 4 strings and 2 numbers)
2.) the model just provided the texts for the 0. column atm (but those 
texts are always the same so it doesn't really matter)
>
> So from this point of view, you can safely use QTreeWidget.
>
>  
>
> You don't provide sufficient details what kind of resizing you need,
>
> but you can probably just resize widgets yourself when it is needed,
>
Sorry again.. I've made the experience that the longer the text the 
fewer people will read it ^^

I've got the following requirements:

Tree
 | - text 1
        widget 1 object
 | - text 2
        widget 2 object
 | - text 3
        widget 2 object with different "edit triggers" (provided by the 
widget itself in a custom way)

Widget 1: QLabel with a static text --> so here setIndexWidget or 
setItemWidget (depending on the QTree*) would be sufficient.
Widget 2: QWidget with a layout and some more widgets inside (some 
Labels, Lineedits, Buttons, Comboboxes and maybe some more layouts ^^)
The second "widget 2" is just another instance of the same QWidget as 
"widget2"

When I now press one of the buttons in "Widget 2" some more widgets 
should be added to one of the layouts of "Widget 2".

Now the case with setIndexWidget/setItemWidget is that the size of the 
QTreeWidgetItem (or whatever you'd like to call it) doesn't change as 
long as I don't collpase and reopen the tree again.
>
> This will minimize development cost. I would not start implementing 
> anything else untiil it is clear that this appoach will not work for me.
>
Totally understandable -- just didn't thought that it would be sooo 
tougth... everything I've done in Qt before was easy-peasy and solved 
within hours or at max. 2 days ^^
>
>  
>
> Regards,
>
>    Alex
>
>  
>
>  
>
> ------------------------------------------------------------------------
>
> *From:* Bernhard Friedreich [mailto:friesoft at gmail.com]
> *Sent:* Monday, March 16, 2009 3:17 AM
> *To:* Malyushytsky, Alex
> *Subject:* Re: [Qt-interest] QTree* with custom widgets
>
>  
>
> Because the widgets needs the ability to be resized! (dynamic content)
>
> From the Qt docu:
>
> This function should only be used to display static content in the 
> place of a tree widget item. If you want to display custom dynamic 
> content or implement a custom editor widget, use QTreeView 
> <qtreeview.html> and subclassQItemDelegate <qitemdelegate.html> instead.
>
>  
>
> 2009/3/16 Malyushytsky, Alex <alex at wai.com <mailto:alex at wai.com>>
>
> Why QTreeWidget::setItemWidget is not working for you?
>
> void QTreeWidget::setItemWidget ( QTreeWidgetItem * item, int column, 
> QWidget * widget )
>
> Regards,
>    Alex
>
>
>
>
> ________________________________________
> From: qt-interest-bounces at trolltech.com 
> <mailto:qt-interest-bounces at trolltech.com> 
> [mailto:qt-interest-bounces at trolltech.com 
> <mailto:qt-interest-bounces at trolltech.com>] On Behalf Of Bernhard 
> Friedreich
> Sent: Sunday, March 15, 2009 1:44 PM
> To: qt-interest at trolltech.com <mailto:qt-interest at trolltech.com>
> Subject: [Qt-interest] QTree* with custom widgets
>
>
> Hey!
>
> I've been fighting with a problem for quite some time now and I've now 
> reached the point from which on I have now idea what is left, I could 
> try. I really hope you guys (and girls ^^) can help me.
>
> I want to use a QTreeView or QTreeWidget (doesn't really matter) with 
> custom widgets.
>
> I've got those requirements:
> * Custom widgets (different rows = different widgets, 0st column: 
> normal description text, 1st column: the widget)
> * dynamic resizing (adding widgets at runtime to the custom widget)
> * the widgets must be shown all the time (NOT JUST FOR EDITING!)
> I've tried setIndexWidget, setItemWidget, a QGraphicsView and 
> ItemDelegates with the paint method..
>
> Already searched on many forums, google and mailings lists but nothing 
> useable turned up.
>
> Here's the thread where I asked for help (provides some more 
> information): 
> http://www.qtforum.org/article/27021/qtree-with-custom-qwidgets.html
>
> I'd REALLY appreciate if you could help me... I'm totally lost atm...
>
> Thanks for your help :-)
>
> Best regards,
> Bernhard Friedreich, Qt fan and developer :-P
>
> ---------------------------------------------------------------------------------------------------
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