<table><tr><td style="">kossebau added a comment.
</td><a style="text-decoration: none; padding: 4px 8px; margin: 0 8px 8px; float: right; color: #464C5C; font-weight: bold; border-radius: 3px; background-color: #F7F7F9; background-image: linear-gradient(to bottom,#fff,#f1f0f1); display: inline-block; border: 1px solid rgba(71,87,120,.2);" href="https://phabricator.kde.org/D15625">View Revision</a></tr></table><br /><div><div><blockquote style="border-left: 3px solid #8C98B8;
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<div style="font-style: normal;
padding-bottom: 4px;">In <a href="https://phabricator.kde.org/D15625#332551" style="background-color: #e7e7e7;
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color: black;text-decoration: none;">D15625#332551</a>, <a href="https://phabricator.kde.org/p/kossebau/" style="
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<div style="margin: 0;
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color: rgb(107, 116, 140);"><p>When it comes to updating the spacing on style changes, something like this should work:</p>
<div class="remarkup-code-block" style="margin: 12px 0;" data-code-lang="text" data-sigil="remarkup-code-block"><pre class="remarkup-code" style="font: 11px/15px "Menlo", "Consolas", "Monaco", monospace; padding: 12px; margin: 0; background: rgba(71, 87, 120, 0.08);">void IdealButtonBarLayout::changeEvent(QEvent* event)
{
QBoxLayout::changeEvent(event);
if (event->type() == QEvent::StyleChange) {
setSpacing(buttonSpacing());
}
}</pre></div></div>
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<p>Eek, missed that <tt style="background: #ebebeb; font-size: 13px;">changeEvent(QEvent *event)</tt> is only added for QWidget, not QObject itself. We would need to install an event filter to the parent widget.</p></div></div><br /><div><strong>INLINE COMMENTS</strong><div><div style="margin: 6px 0 12px 0;"><div style="border: 1px solid #C7CCD9; border-radius: 3px;"><div style="padding: 0; background: #F7F7F7; border-color: #e3e4e8; border-style: solid; border-width: 0 0 1px 0; margin: 0;"><div style="color: #74777d; background: #eff2f4; padding: 6px 8px; overflow: hidden;"><a style="float: right; text-decoration: none;" href="https://phabricator.kde.org/D15625#inline-85378">View Inline</a><span style="color: #4b4d51; font-weight: bold;">ideallayout.cpp:47</span></div>
<div style="font: 11px/15px "Menlo", "Consolas", "Monaco", monospace; white-space: pre-wrap; clear: both; padding: 4px 0; margin: 0;"><div style="padding: 0 8px; margin: 0 4px; background: rgba(251, 175, 175, .7);"> <span class="bright"></span><span class="n"><span class="bright">Q_ASSERT</span></span><span class="bright"></span><span class="p"><span class="bright">(</span></span><span class="bright"></span><span class="n"><span class="bright">orientation</span></span><span class="bright"></span><span class="p"><span class="bright">()</span></span><span class="bright"> </span><span style="color: #aa2211"><span class="bright">==</span></span><span class="bright"> </span><span class="n"><span class="bright">Qt</span></span><span class="bright"></span><span style="color: #aa2211"><span class="bright">::</span></span><span class="bright"></span><span class="n"><span class="bright">Vertical</span></span><span class="p">);</span>
</div><div style="padding: 0 8px; margin: 0 4px; background: rgba(251, 175, 175, .7);"> <span class="bright"></span><span class="n"><span class="bright">_height</span></span><span class="bright"> </span><span style="color: #aa2211"><span class="bright">=</span></span><span class="bright"> </span><span class="n"><span class="bright">height</span></span><span class="p">;</span>
</div><div style="padding: 0 8px; margin: 0 4px; background: rgba(251, 175, 175, .7);">
</div><div style="padding: 0 8px; margin: 0 4px; background: rgba(251, 175, 175, .7);"> <span class="p">(</span><span style="color: #aa4000">void</span><span class="p">)</span> <span class="n">invalidate</span><span class="p">();</span>
</div><div style="padding: 0 8px; margin: 0 4px; background: rgba(151, 234, 151, .6);"> <span class="bright"></span><span class="n"><span class="bright">setContentsMargins</span></span><span class="bright"></span><span class="p"><span class="bright">(</span></span><span class="bright"></span><span style="color: #601200"><span class="bright">0</span></span><span class="bright"></span><span class="p"><span class="bright">,</span></span><span class="bright"> </span><span style="color: #601200"><span class="bright">0</span></span><span class="bright"></span><span class="p"><span class="bright">,</span></span><span class="bright"> </span><span style="color: #601200"><span class="bright">0</span></span><span class="bright"></span><span class="p"><span class="bright">,</span></span><span class="bright"> </span><span style="color: #601200"><span class="bright">0</span></span><span class="p">);</span>
</div><div style="padding: 0 8px; margin: 0 4px; background: rgba(151, 234, 151, .6);"> <span class="bright"></span><span class="n"><span class="bright">setSpacing</span></span><span class="bright"></span><span class="p"><span class="bright">(</span></span><span class="bright"></span><span class="n"><span class="bright">buttonSpacing</span></span><span class="bright"></span><span class="p"><span class="bright">())</span>;</span>
</div><div style="padding: 0 8px; margin: 0 4px; "><span class="p">}</span>
</div></div></div>
<div style="margin: 8px 0; padding: 0 12px;"><p style="padding: 0; margin: 8px;">We have an issue here. <tt style="background: #ebebeb; font-size: 13px;">buttonSpacing()</tt> looks for any <tt style="background: #ebebeb; font-size: 13px;">parentWidget()</tt> to take the style from, otherwise defaults to <tt style="background: #ebebeb; font-size: 13px;">0</tt>.<br />
And currently we create IdealButtonBarLayout without any QWidget parent, so at this point in time the spacing is set to the default value <tt style="background: #ebebeb; font-size: 13px;">0</tt>.<br />
So we need to somehow learn about the containing parent widget.</p>
<p style="padding: 0; margin: 8px;">One solution might be to add an explicit property *QWidget* m_styleParentWidget` to <br />
<tt style="background: #ebebeb; font-size: 13px;">IdealButtonBarLayout</tt>, which gets set via the constructor, so it is available from the start. And could also be used for catching the event about style changes.</p></div></div></div></div></div><br /><div><strong>REPOSITORY</strong><div><div>R32 KDevelop</div></div></div><br /><div><strong>BRANCH</strong><div><div>segfault-fix</div></div></div><br /><div><strong>REVISION DETAIL</strong><div><a href="https://phabricator.kde.org/D15625">https://phabricator.kde.org/D15625</a></div></div><br /><div><strong>To: </strong>amhndu, KDevelop, kossebau, rjvbb<br /><strong>Cc: </strong>kossebau, rjvbb, kdevelop-devel, glebaccon, antismap, iodelay, vbspam, geetamc, Pilzschaf, akshaydeo, surgenight, arrowd<br /></div>