Fix QLineEdit's Highlight color when inactive.

This commit also updates QPalette's documentation regarding the current
ColorGroup and operator==.

Task-number: QTBUG-697
Reviewed-by: ogoffart
(cherry picked from commit 24cdab32de2abd8669f281dd54c8da1124514915)

2 files changed, 12 insertions, 1 deletions

diff --git a/src/gui/kernel/qpalette.cpp b/src/gui/kernel/qpalette.cpp
index 98e8f66..38ec806 100644
--- a/src/gui/kernel/qpalette.cpp
+++ b/src/gui/kernel/qpalette.cpp
@@ -868,11 +868,21 @@ void QPalette::detach()
 
     Returns true (slowly) if this palette is different from \a p;
     otherwise returns false (usually quickly).
+
+    \note The current ColorGroup is not taken into account when
+    comparing palettes
+
+    \sa operator==
 */
 
 /*!
     Returns true (usually quickly) if this palette is equal to \a p;
     otherwise returns false (slowly).
+
+    \note The current ColorGroup is not taken into account when
+    comparing palettes
+
+    \sa operator!=
 */
 bool QPalette::operator==(const QPalette &p) const
 {
diff --git a/src/gui/widgets/qlineedit.cpp b/src/gui/widgets/qlineedit.cpp
index 1bffde1..86e56bc 100644
--- a/src/gui/widgets/qlineedit.cpp
+++ b/src/gui/widgets/qlineedit.cpp
@@ -1946,7 +1946,8 @@ void QLineEdit::paintEvent(QPaintEvent *)
     if (d->control->hasSelectedText() || (d->cursorVisible && !d->control->inputMask().isEmpty() && !d->control->isReadOnly())){
         flags |= QLineControl::DrawSelections;
         // Palette only used for selections/mask and may not be in sync
-        if(d->control->palette() != pal)
+        if (d->control->palette() != pal
+           || d->control->palette().currentColorGroup() != pal.currentColorGroup())
             d->control->setPalette(pal);
     }