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Bug
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Resolution: Invalid
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P1: Critical
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None
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5.9.0
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None
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Arch Linux x86_64
Qt 5.9.0
KDE Konsole 17.04.2
KDE Konsole's tabbar is broken with Qt 5.9. This is a regression with respect to Qt 5.8.
With a single tab the Konsole tabbar is arranged such that the tab occupies 50% of the bar and the rest is empty. The user can double click the empty space to create a new tab.
With Qt 5.9 the empty space is gone and the single tab does not look properly aligned.
This issue is caused by the solution to https://bugreports.qt.io/browse/QTBUG-58266, more specifically, by commit 175f33ed855b0a8a30daafacd4f48fa3f8e76a9b.
This patch fixes the problem:
diff --git a/src/widgets/widgets/qtabbar.cpp b/src/widgets/widgets/qtabbar.cpp
index 060d1f9a03..e67f6969e7 100644
--- a/src/widgets/widgets/qtabbar.cpp
+++ b/src/widgets/widgets/qtabbar.cpp
@@ -518,13 +518,11 @@ void QTabBarPrivate::layoutTabs()
maxExtent = maxWidth;
}
- if (!expanding) {
- // Mirror our front item.
- tabChain[tabChainIndex].init();
- tabChain[tabChainIndex].expansive = (tabAlignment != Qt::AlignRight)
- && (tabAlignment != Qt::AlignJustify);
- tabChain[tabChainIndex].empty = true;
- }
+ // Mirror our front item.
+ tabChain[tabChainIndex].init();
+ tabChain[tabChainIndex].expansive = (tabAlignment != Qt::AlignRight)
+ && (tabAlignment != Qt::AlignJustify);
+ tabChain[tabChainIndex].empty = true;
Q_ASSERT(tabChainIndex == tabChain.count() - 1); // add an assert just to make sure.
// Do the calculation
See also:
https://bugs.kde.org/show_bug.cgi?id=380879
https://bugreports.qt.io/browse/QTBUG-58266
