[Qt-interest] How to make a QDialog that acts like a pop up

Tue Mar 17 14:44:55 CET 2009

Hi,

I am developing an application that lets a user change the brightness/contrast of an image. There is a button for this, but when that button is pushed, a "floating dialog" pops up with some sliders. I remove the border around the dialog so it doesn't appear to be a dialog. Problem is since its a dialog, and theres no close button, you cant do anything else till you hit escape. What I am trying to do is make it so that clicking anywhere else would make the dialog disappear. Similar to how a popup behaves. I tried using the Qt::Popup flag, but that didnt work. It styled it like a popup which was nice, but it wouldnt disappear when I clicked anywhere else.

Any ideas?

Thanks

________________________________
From: "NARCISO, Rui" <RUI.NARCISO at airbus.com>
To: "Malyushytsky, Alex" <alex at wai.com>; qt-interest at trolltech.com
Sent: Tuesday, March 17, 2009 9:20:57 AM
Subject: Re: [Qt-interest] QTree* with custom widgets

In the same subject, I'm having a problem with custom widgets ..

I have several item sin my tree and for each item I have some columns of text and a column with a custom widget...
After removing an item (with parent().removeChild()), sorting the data through any column makes it that all of the custom widgets disappear except  the one slected at the moment of the sorting ... re-sorting to as it was before makes them all re-appear again ...

Was I clear ?

Rui

-----Message d'origine-----
De : qt-interest-bounces at trolltech.com
[mailto:qt-interest-bounces at trolltech.com]De la part de Malyushytsky,
Alex
Envoyé : lundi 16 mars 2009 21:51
À : qt-interest at trolltech.com
Objet : Re: [Qt-interest] QTree* with custom widgets

>> 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 means that all you need is to force QTreeWidget to update when you done editing (you will have to figure out when yourself, cause it depends on your widget)

I am sure it should be a way.
You could always do the following, cause it is equivalent of what you were doing with probably even completely acceptable graphics update.
- setUpdatesEnabled ( false );
- collapse/ expand
   or removeItemWidget and insert it back (should inforce updating this widget.
- setUpdatesEnabled ( true );

But I believe there should be direct way to inforce QTreeWidget to update

I don't have access to my development machine right now, so can't test it , but hope can give you some hints.

1. check that uniformRowHeights () is false. 
2. try call update() on QTreeWidget

3. Finally check what is called in QAbstractItemView::setIndexWidget(...)
(QT source) to update geometry. It should be  
QAbstractItemView::dataChanged ( ... ).
Call it yourself. This probably is the best way and should work.

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 and subclassQItemDelegate instead.

2009/3/16 Malyushytsky, Alex <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] On Behalf Of Bernhard Friedreich
Sent: Sunday, March 15, 2009 1:44 PM
To: 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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