[Qt-interest] QSortFilterProxyModel - the parent item does not match i want to go down to the child as well and filter

[Sajjad]

Hello Scott,

I believe that i am causing some misunderstanding here. All  the examples i
have been following about QSortFilterProxyModel shows that the Filtered
model shows the reduced view based on the regular expression pattern.


In my case i do not want to show only the item of the tree that matches the
pattern, the whole tree will be there as it is, but the item that matches
the pattern will be high-lighted in the view. Even if the parent is not
expanded the matched pattern will be shown high-lighted in the expanded tree
view.


Regards
Sajjad

On Wed, Nov 17, 2010 at 4:00 PM, Scott Aron Bloom <Scott.Bloom at onshorecs.com
> wrote:

> Make sure your filter check is minimal and fast…
>
>
>
> But if you want to show a parent, if any of its children pass, then you
> have to check the children…
>
>
> Scott
>
>
>
> *From:* qt-interest-bounces at trolltech.com [mailto:
> qt-interest-bounces at trolltech.com] *On Behalf Of *Sajjad
> *Sent:* Wednesday, November 17, 2010 1:00 AM
>
> *To:* qt-interest at trolltech.com
> *Subject:* Re: [Qt-interest] QSortFilterProxyModel - the parent item does
> not match i want to go down to the child as well and filter
>
>
>
> Any other suggestion to achieve this efficient manner to avoid this
> run-time issue?
>
>
>
>
>
> Regards
>
> Sajjad
>
> On Mon, Nov 15, 2010 at 3:21 AM, Scott Aron Bloom <
> Scott.Bloom at onshorecs.com> wrote:
>
> Its actually quite easy to do.
>
>
>
> However, it can be very very expensive from a runtime POV.. since the
> complete child tree will have to be evaluated
>
>
>
> Simply derive from QSFPM and overload filterAcceptsRow
>
>
>
> Scott
>
>
>
> *From:* qt-interest-bounces at trolltech.com [mailto:
> qt-interest-bounces at trolltech.com] *On Behalf Of *Sajjad
> *Sent:* Sunday, November 14, 2010 5:38 PM
> *To:* qt-interest at trolltech.com
> *Subject:* [Qt-interest] QSortFilterProxyModel - the parent item does not
> match i want to go down to the child as well and filter
>
>
>
> Hello forum,
>
>
>
> I have loaded a database in the tree-hierarchy with the QTreeView and i
> want to highlight a particular tree item by the regular expression entered
> by  the user in
>
> the line edit.
>
>
>
> I am using the QSortFilterProxyModel to get this done. According to  the
> manual ,
>
>
>
> For hierarchical models, the filter is applied recursively to all children.
> *If a parent item doesn't match the filter, none of its children will be
> shown.*
>
>
>
> I want to over-ride the feature in the bold text and i want to apply filter
> both to the parent and child . But the parent item does not match i want to
> go down to the
>
>
>
> child as well.
>
>
>
> I think i have to subclass the QSortFilterProxyModel. Am in the right
> track?
>
>
>
>
>
> Regards
>
> Sajjad
>
>
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