'[PyQt] QPersistentModelIndex problem'

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List:       pykde
Subject:    [PyQt] QPersistentModelIndex problem
From:       Roberto Alsina <ralsina () kde ! org>
Date:       2009-02-07 3:32:12
Message-ID: 200902070132.12443.ralsina () kde ! org
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I am trying to inherit QAbstractItemModel and am having problems implementing 
parent().

In order to do it correctly to represent a tree structure, I am storing a 
QPersistentModelIndex in my tree node.

However, parent needs to return a plain QModelIndex.

AFAICS, this is how you convert:

QPersistentModelIndex::operator const QModelIndex & () const

Cast operator that returns a const QModelIndex&.

But how can I do that from python?

[Attachment #5 (text/html)]

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN" \
"http://www.w3.org/TR/REC-html40/strict.dtd"><html><head><meta name="qrichtext" content="1" /><style \
type="text/css">p, li { white-space: pre-wrap; }</style></head><body style=" font-family:'Droid Sans \
Mono'; font-size:8pt; font-weight:400; font-style:normal;">I am trying to inherit QAbstractItemModel and \
am having problems implementing parent().<br> <p style="-qt-paragraph-type:empty; margin-top:0px; \
margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; \
-qt-user-state:0;"><br></p>In order to do it correctly to represent a tree structure, I am storing a \
QPersistentModelIndex in my tree node.<br> <p style="-qt-paragraph-type:empty; margin-top:0px; \
margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; \
-qt-user-state:0;"><br></p>However, parent needs to return a plain QModelIndex.<br> <p \
style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; \
-qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><br></p>AFAICS, this is how you convert:<br> <p \
style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; \
-qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><br></p><span style=" \
font-style:italic;">QPersistentModelIndex::operator const QModelIndex &amp; () const</span><br> <p \
style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; \
-qt-block-indent:0; text-indent:0px; -qt-user-state:0; font-style:italic;"><br></p><p style=" \
margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; \
text-indent:0px; -qt-user-state:0; font-style:italic;">Cast operator that returns a const \
QModelIndex&amp;.</p><p style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; \
margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0; \
font-style:italic;"><br></p><p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; \
margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0; font-style:italic;"><span \
style=" font-style:normal;">But how can I do that from python?</span></p></body></html>

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