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List: pykde
Subject: Re: [PyQt] Resizing index widgets
From: Mads Ipsen <mads.ipsen () gmail ! com>
Date: 2013-01-31 6:44:19
Message-ID: 510A12C3.6060503 () gmail ! com
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Hi Detlev,
We have of the order 60-70 interface plugins available in our 'tool box'
- to be able to order them, group them, filter/search them - and still
maintain a compact layout - I felt that the QToolBox offered too 'flat'
a solution. Let me know your opinion or suggestions for a better approach.
Best regards,
Mads
On 01/30/2013 07:11 PM, Detlev Offenbach wrote:
>
> Hi Mads,
>
> why are you using QTreeView? I would use QToolbox for such a layout.
>
> Regards,
>
> Detlev
>
> On Tuesday 29 January 2013, 22:31:14 Mads Ipsen wrote:
>
> Hi,
>
> We develop a tool for manipulating atomic structures and have embedded
> all the manipulation widgets in a panel bar (widget on the right in
> attached screen0.png). The Panel bar has expandable buttons, which
> upon expansion display different interfaces for manipulating the
> atomic structures.
>
> The whole thing is implemented using a MVC approach using a QTreeView
> and an overloaded QItemDelegate class used for handling painting of
> the buttons, sizeHints, etc. The widget interfaces however, are
> displayed by setting setIndexWidget() on the tree view.
>
> This works fine if the widgets have a fixed size. However if the
> atomic structure changes (molecule to crystal), previously hidden GUI
> elements may be shown in the widget, which gives rise to a compressed
> (bad) layout since the index widget has a fixed size (screen1.png).
>
> The only way I could fix this was to use an idle time, that keeps
> triggering the emission of the signal
>
> sizeHintChanged(const QModelIndex & index)
>
> from the delegate. This immediately triggers a smooth update of the
> index widget resulting in screen2.png. From a user perspective it
> works fine, but to me it appears somewhat hacky. Is there eg. a way to
> monitor layout changes in visible index widgets?
>
> Best regards,
>
> Mads
>
> --
> +-----------------------------------------------------+
> | Mads Ipsen |
> +----------------------+------------------------------+
> | Gåsebæksvej 7, 4. tv | |
> | DK-2500 Valby | phone: +45-29716388 |
> | Denmark | email:mads.ipsen@gmail.com <mailto:mads.ipsen@gmail.com> |
> +----------------------+------------------------------+
>
>
>
>
> --
>
> Detlev Offenbach
>
> detlev@die-offenbachs.de
>
--
+-----------------------------------------------------+
| Mads Ipsen |
+----------------------+------------------------------+
| Gåsebæksvej 7, 4. tv | |
| DK-2500 Valby | phone: +45-29716388 |
| Denmark | email: mads.ipsen@gmail.com |
+----------------------+------------------------------+
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<div class="moz-cite-prefix">Hi Detlev,<br>
<br>
We have of the order 60-70 interface plugins available in our
'tool box' - to be able to order them, group them, filter/search
them - and still maintain a compact layout - I felt that the
QToolBox offered too 'flat' a solution. Let me know your opinion
or suggestions for a better approach.<br>
<br>
Best regards,<br>
<br>
Mads<br>
<br>
<br>
<br>
On 01/30/2013 07:11 PM, Detlev Offenbach wrote:<br>
</div>
<blockquote cite="mid:9715474.KBG4KLnFAW@saturn" type="cite">
<meta name="qrichtext" content="1">
<style type="text/css">
p, li { white-space: pre-wrap; }
</style>
<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;">Hi Mads,</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; "> </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;">why are you using QTreeView? I would use
QToolbox for such a layout.</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; "> </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;">Regards,</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;">Detlev<br>
<br>
On Tuesday 29 January 2013, 22:31:14 Mads Ipsen wrote:<br>
</p>
<p style=" margin-top:12px; margin-bottom:12px; margin-left:40px;
margin-right:40px; -qt-block-indent:0; text-indent:0px;
-qt-user-state:0;"><span style=" font-family:'Consolas';">Hi,<br>
<br>
We develop a tool for manipulating atomic structures and have
embedded all the manipulation widgets in a panel bar (widget
on the right in attached screen0.png). The Panel bar has
expandable buttons, which upon expansion display different
interfaces for manipulating the atomic structures.<br>
<br>
The whole thing is implemented using a MVC approach using a
QTreeView and an overloaded QItemDelegate class used for
handling painting of the buttons, sizeHints, etc. The widget
interfaces however, are displayed by setting setIndexWidget()
on the tree view. <br>
<br>
This works fine if the widgets have a fixed size. However if
the atomic structure changes (molecule to crystal), previously
hidden GUI elements may be shown in the widget, which gives
rise to a compressed (bad) layout since the index widget has a
fixed size (screen1.png).<br>
<br>
The only way I could fix this was to use an idle time, that
keeps triggering the emission of the signal<br>
<br>
sizeHintChanged(const QModelIndex & index)<br>
<br>
from the delegate. This immediately triggers a smooth update
of the index widget resulting in screen2.png. From a user
perspective it works fine, but to me it appears somewhat
hacky. Is there eg. a way to monitor layout changes in visible
index widgets?<br>
<br>
Best regards,<br>
<br>
Mads<br>
</span><br>
</p>
<pre style=" margin-top:12px; margin-bottom:0px; margin-left:40px; \
margin-right:40px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span \
style=" font-family:'Courier New,courier';">-- </span></pre> <pre style=" \
margin-top:0px; margin-bottom:0px; margin-left:40px; margin-right:40px; \
-qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span style=" \
font-family:'Courier \
New,courier';">+-----------------------------------------------------+</span></pre> \
<pre style=" margin-top:0px; margin-bottom:0px; margin-left:40px; margin-right:40px; \
-qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span style=" \
font-family:'Courier New,courier';">| Mads Ipsen \
|</span></pre> <pre style=" margin-top:0px; margin-bottom:0px; margin-left:40px; \
margin-right:40px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span \
style=" font-family:'Courier \
New,courier';">+----------------------+------------------------------+</span></pre> \
<pre style=" margin-top:0px; margin-bottom:0px; margin-left:40px; margin-right:40px; \
-qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span style=" \
font-family:'Courier New,courier';">| Gåsebæksvej 7, 4. tv | \
|</span></pre> <pre style=" margin-top:0px; margin-bottom:0px; margin-left:40px; \
margin-right:40px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span \
style=" font-family:'Courier New,courier';">| DK-2500 Valby | phone: \
+45-29716388 |</span></pre> <pre style=" margin-top:0px; margin-bottom:0px; \
margin-left:40px; margin-right:40px; -qt-block-indent:0; text-indent:0px; \
-qt-user-state:0;"><span style=" font-family:'Courier New,courier';">| Denmark \
| email: </span><a moz-do-not-send="true" href="mailto:mads.ipsen@gmail.com"><span \
style=" font-family:'Courier New,courier'; text-decoration: underline; \
color:#0057ae;">mads.ipsen@gmail.com</span></a><span style=" font-family:'Courier \
New,courier';"> |</span></pre> <pre style=" margin-top:0px; margin-bottom:0px; \
margin-left:40px; margin-right:40px; -qt-block-indent:0; text-indent:0px; \
-qt-user-state:0;"><span style=" font-family:'Courier \
New,courier';">+----------------------+------------------------------+</span></pre>
<pre style=" margin-top:0px; margin-bottom:12px; margin-left:40px; \
margin-right:40px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"> </pre> \
<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;"><br>
<br>
-- </p>
<p style=" margin-top:12px; margin-bottom:0px; margin-left:0px;
margin-right:0px; -qt-block-indent:0; text-indent:0px;
-qt-user-state:0;"><span style=" font-size:11pt;
font-weight:600;">Detlev Offenbach</span></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;"><a class="moz-txt-link-abbreviated" \
href="mailto:detlev@die-offenbachs.de">detlev@die-offenbachs.de</a></p> \
</blockquote> <br>
<br>
<pre class="moz-signature" cols="72">--
+-----------------------------------------------------+
> Mads Ipsen |
+----------------------+------------------------------+
> Gåsebæksvej 7, 4. tv | |
> DK-2500 Valby | phone: +45-29716388 |
> Denmark | email: <a class="moz-txt-link-abbreviated" \
> href="mailto:mads.ipsen@gmail.com">mads.ipsen@gmail.com</a> |
+----------------------+------------------------------+
</pre>
</body>
</html>
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