From c7d10b6155f5c98e2cc50ee791ad0c02aedb5819 Mon Sep 17 00:00:00 2001
From: Denis Dzyubenko <denis.dzyubenko@nokia.com>
Date: Tue, 9 Mar 2010 18:14:52 +0100
Subject: Do not beep on Mac when pressing some keys.

When a key event is delivered to widgets, we should accept the event if the
widget reacted to it in any way - if either the current item has changed or if
the widget scrolled.

Task-number: QTBUG-6444
Reviewed-by: Prasanth
(cherry picked from commit 77230f7ec9e78ec2d57629ea934ceb1d59eb391e)
---
 src/gui/itemviews/qabstractitemview.cpp |  7 ++++++-
 src/gui/itemviews/qabstractitemview_p.h |  1 +
 src/gui/itemviews/qtreeview.cpp         | 12 ++++++++++--
 src/gui/widgets/qlinecontrol.cpp        |  1 -
 4 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/src/gui/itemviews/qabstractitemview.cpp b/src/gui/itemviews/qabstractitemview.cpp
index 3be46a0..b354ba9 100644
--- a/src/gui/itemviews/qabstractitemview.cpp
+++ b/src/gui/itemviews/qabstractitemview.cpp
@@ -104,7 +104,8 @@ QAbstractItemViewPrivate::QAbstractItemViewPrivate()
         horizontalScrollMode(QAbstractItemView::ScrollPerItem),
         currentIndexSet(false),
         wrapItemText(false),
-        delayedPendingLayout(false)
+        delayedPendingLayout(false),
+        moveCursorUpdatedView(false)
 {
 }
 
@@ -2213,6 +2214,7 @@ void QAbstractItemView::keyPressEvent(QKeyEvent *event)
 #endif
 
     QPersistentModelIndex newCurrent;
+    d->moveCursorUpdatedView = false;
     switch (event->key()) {
     case Qt::Key_Down:
         newCurrent = moveCursor(MoveDown, event->modifiers());
@@ -2269,6 +2271,7 @@ void QAbstractItemView::keyPressEvent(QKeyEvent *event)
                 QRect rect(d->pressedPosition - d->offset(), QSize(1, 1));
                 setSelection(rect, command);
             }
+            event->accept();
             return;
         }
     }
@@ -2366,6 +2369,8 @@ void QAbstractItemView::keyPressEvent(QKeyEvent *event)
         }
         break; }
     }
+    if (d->moveCursorUpdatedView)
+        event->accept();
 }
 
 /*!
diff --git a/src/gui/itemviews/qabstractitemview_p.h b/src/gui/itemviews/qabstractitemview_p.h
index 614927c..4508fd4 100644
--- a/src/gui/itemviews/qabstractitemview_p.h
+++ b/src/gui/itemviews/qabstractitemview_p.h
@@ -419,6 +419,7 @@ public:
 
     bool wrapItemText;
     mutable bool delayedPendingLayout;
+    bool moveCursorUpdatedView;
 
 private:
     mutable QBasicTimer delayedLayout;
diff --git a/src/gui/itemviews/qtreeview.cpp b/src/gui/itemviews/qtreeview.cpp
index 8aa2444..217c965 100644
--- a/src/gui/itemviews/qtreeview.cpp
+++ b/src/gui/itemviews/qtreeview.cpp
@@ -2138,9 +2138,10 @@ QModelIndex QTreeView::moveCursor(CursorAction cursorAction, Qt::KeyboardModifie
         return d->modelIndex(d->above(vi), current.column());
     case MoveLeft: {
         QScrollBar *sb = horizontalScrollBar();
-        if (vi < d->viewItems.count() && d->viewItems.at(vi).expanded && d->itemsExpandable && sb->value() == sb->minimum())
+        if (vi < d->viewItems.count() && d->viewItems.at(vi).expanded && d->itemsExpandable && sb->value() == sb->minimum()) {
             d->collapse(vi, true);
-        else {
+            d->moveCursorUpdatedView = true;
+        } else {
             bool descend = style()->styleHint(QStyle::SH_ItemView_ArrowKeysNavigateIntoChildren, 0, this);
             if (descend) {
                 QModelIndex par = current.parent();
@@ -2160,7 +2161,10 @@ QModelIndex QTreeView::moveCursor(CursorAction cursorAction, Qt::KeyboardModifie
                         return next;
                 }
 
+                int oldValue = sb->value();
                 sb->setValue(sb->value() - sb->singleStep());
+                if (oldValue != sb->value())
+                    d->moveCursorUpdatedView = true;
             }
 
         }
@@ -2172,6 +2176,7 @@ QModelIndex QTreeView::moveCursor(CursorAction cursorAction, Qt::KeyboardModifie
         if (vi < d->viewItems.count() && !d->viewItems.at(vi).expanded && d->itemsExpandable
             && d->hasVisibleChildren(d->viewItems.at(vi).index)) {
             d->expand(vi, true);
+            d->moveCursorUpdatedView = true;
         } else {
             bool descend = style()->styleHint(QStyle::SH_ItemView_ArrowKeysNavigateIntoChildren, 0, this);
             if (descend) {
@@ -2194,7 +2199,10 @@ QModelIndex QTreeView::moveCursor(CursorAction cursorAction, Qt::KeyboardModifie
 
                 //last restort: we change the scrollbar value
                 QScrollBar *sb = horizontalScrollBar();
+                int oldValue = sb->value();
                 sb->setValue(sb->value() + sb->singleStep());
+                if (oldValue != sb->value())
+                    d->moveCursorUpdatedView = true;
             }
         }
         updateGeometries();
diff --git a/src/gui/widgets/qlinecontrol.cpp b/src/gui/widgets/qlinecontrol.cpp
index 6c7c447..1ce482c 100644
--- a/src/gui/widgets/qlinecontrol.cpp
+++ b/src/gui/widgets/qlinecontrol.cpp
@@ -1761,7 +1761,6 @@ void QLineControl::processKeyEvent(QKeyEvent* event)
                 }
                 break;
 #endif
-
             default:
                 if (!handled)
                     unknown = true;
-- 
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