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QTabBar: fix expanded tabs appearance

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Fix regression introduced by 175f33ed8. 'expanding' property set to true
was ignored when QStyle::styleHint() returned Qt::AlignRight for
SH_TabBar_Alignment.

When we calculate tabs geometry, we put an empty tab at the front and
back and set its expansive attribute depending on tab alignment AND
'expanding' property.

Task-number: QTBUG-61480
Change-Id: I6a1827ae8a3f2c6bee5124c18c7f2b1c0a7862f3
Reviewed-by: Gabriel de Dietrich <gabriel.dedietrich@qt.io>
This commit is contained in:
Oleg Yadrov 2017-06-16 17:06:53 -04:00
parent ffe8884ac3
commit 6e9d24212d
2 changed files with 26 additions and 10 deletions
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18
src/widgets/widgets/qtabbar.cpp
View File

@ -447,9 +447,10 @@ void QTabBarPrivate::layoutTabs()
QVector<QLayoutStruct> tabChain(tabList.count() + 2);
// We put an empty item at the front and back and set its expansive attribute
// depending on tabAlignment.
// depending on tabAlignment and expanding.
tabChain[tabChainIndex].init();
tabChain[tabChainIndex].expansive = (tabAlignment != Qt::AlignLeft)
tabChain[tabChainIndex].expansive = (!expanding)
&& (tabAlignment != Qt::AlignLeft)
&& (tabAlignment != Qt::AlignJustify);
tabChain[tabChainIndex].empty = true;
++tabChainIndex;
@ -514,13 +515,12 @@ 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 = (!expanding)
&& (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

18
tests/manual/qtabbar/main.cpp
View File

@ -56,12 +56,28 @@
#include <QLayout>
#include <QDesktopWidget>
#include <QTabWidget>
#include <QProxyStyle>
class MyProxyStyle : public QProxyStyle
{
public:
int styleHint(StyleHint hint, const QStyleOption *option = 0,
const QWidget *widget = 0, QStyleHintReturn *returnData = 0) const
{
if (hint == QStyle::SH_TabBar_Alignment)
return Qt::AlignLeft;
// return Qt::AlignRight;
// return Qt::AlignCenter;
return QProxyStyle::styleHint(hint, option, widget, returnData);
}
};
const int TabCount = 5;
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
app.setStyle(new MyProxyStyle);
QWidget widget;
QStackedWidget stackedWidget;
@ -69,7 +85,7 @@ int main(int argc, char *argv[])
tabBar.setDocumentMode(true);
tabBar.setTabsClosable(true);
tabBar.setMovable(true);
tabBar.setExpanding(true);
tabBar.setExpanding(false);
// top
tabBar.setShape(QTabBar::RoundedNorth);