widgets: Remove unused member QTLWExtra::inTopLevelResize

It was introduced in Qt 4.4 (e150f6a6e619) to work around slow resizes
on Windows and X11 due to excessive painting, but has since been removed
when old dead code never ported to QPA was removed in a2337f79ff.

Change-Id: Ic14e714a02edb4194a445a6bb0759b601799fdc6
Reviewed-by: Paul Olav Tvete <paul.tvete@qt.io>

src/widgets/kernel/qwidget.cpp

@@ -1592,7 +1592,6 @@ void QWidgetPrivate::createTLExtra()
         x->opacity = 255;
         x->posIncludesFrame = 0;
         x->sizeAdjusted = false;
-        x->inTopLevelResize = false;
         x->embedded = 0;
         x->window = nullptr;
         x->initialScreenIndex = -1;
@@ -10790,7 +10789,7 @@ void QWidgetPrivate::repaint(T r)
         return;
 
     QTLWExtra *tlwExtra = q->window()->d_func()->maybeTopData();
-    if (tlwExtra && !tlwExtra->inTopLevelResize && tlwExtra->backingStore)
+    if (tlwExtra && tlwExtra->backingStore)
         tlwExtra->repaintManager->markDirty(r, q, QWidgetRepaintManager::UpdateNow);
 }
 
@@ -10865,7 +10864,7 @@ void QWidgetPrivate::update(T r)
     }
 
     QTLWExtra *tlwExtra = q->window()->d_func()->maybeTopData();
-    if (tlwExtra && !tlwExtra->inTopLevelResize && tlwExtra->backingStore)
+    if (tlwExtra && tlwExtra->backingStore)
         tlwExtra->repaintManager->markDirty(clipped, q);
 }
 

src/widgets/kernel/qwidget_p.h

@@ -155,7 +155,6 @@ struct QTLWExtra {
     uint opacity : 8;
     uint posIncludesFrame : 1;
     uint sizeAdjusted : 1;
-    uint inTopLevelResize : 1;
     uint embedded : 1;
 };
 

src/widgets/kernel/qwidgetrepaintmanager.cpp

@@ -166,7 +166,7 @@ void QWidgetPrivate::invalidateBackingStore(const T &r)
         return;
 
     QTLWExtra *tlwExtra = q->window()->d_func()->maybeTopData();
-    if (!tlwExtra || tlwExtra->inTopLevelResize || !tlwExtra->backingStore)
+    if (!tlwExtra || !tlwExtra->backingStore)
         return;
 
     T clipped(r);
@@ -213,7 +213,6 @@ void QWidgetRepaintManager::markDirty(const T &r, QWidget *widget, UpdateTime up
 
     Q_ASSERT(tlw->d_func()->extra);
     Q_ASSERT(tlw->d_func()->extra->topextra);
-    Q_ASSERT(!tlw->d_func()->extra->topextra->inTopLevelResize);
     Q_ASSERT(widget->isVisible() && widget->updatesEnabled());
     Q_ASSERT(widget->window() == tlw);
     Q_ASSERT(!r.isEmpty());
@@ -446,8 +445,6 @@ void QWidgetPrivate::moveRect(const QRect &rect, int dx, int dy)
 
     QWidget *tlw = q->window();
     QTLWExtra* x = tlw->d_func()->topData();
-    if (x->inTopLevelResize)
-        return;
 
     static const bool accelEnv = qEnvironmentVariableIntValue("QT_NO_FAST_MOVE") == 0;
 
@@ -543,8 +540,6 @@ void QWidgetPrivate::scrollRect(const QRect &rect, int dx, int dy)
     Q_Q(QWidget);
     QWidget *tlw = q->window();
     QTLWExtra* x = tlw->d_func()->topData();
-    if (x->inTopLevelResize)
-        return;
 
     QWidgetRepaintManager *repaintManager = x->repaintManager.get();
     if (!repaintManager)
@@ -722,8 +717,7 @@ void QWidgetRepaintManager::sync(QWidget *exposedWidget, const QRegion &exposedR
 {
     qCInfo(lcWidgetPainting) << "Syncing" << exposedRegion << "of" << exposedWidget;
 
-    QTLWExtra *tlwExtra = tlw->d_func()->maybeTopData();
-    if (!tlw->isVisible() || !tlwExtra || tlwExtra->inTopLevelResize)
+    if (!tlw->isVisible())
         return;
 
     if (!exposedWidget || !hasPlatformWindow(exposedWidget)
@@ -815,10 +809,9 @@ void QWidgetRepaintManager::paintAndFlush()
     const bool updatesDisabled = !tlw->updatesEnabled();
     bool repaintAllWidgets = false;
 
-    const bool inTopLevelResize = tlw->d_func()->maybeTopData()->inTopLevelResize;
     const QRect tlwRect = tlw->data->crect;
     const QRect surfaceGeometry(tlwRect.topLeft(), store->size());
-    if ((inTopLevelResize || surfaceGeometry.size() != tlwRect.size()) && !updatesDisabled) {
+    if ((surfaceGeometry.size() != tlwRect.size()) && !updatesDisabled) {
         if (hasStaticContents() && !store->size().isEmpty() ) {
             // Repaint existing dirty area and newly visible area.
             const QRect clipRect(0, 0, surfaceGeometry.width(), surfaceGeometry.height());
@@ -837,7 +830,7 @@ void QWidgetRepaintManager::paintAndFlush()
         }
     }
 
-    if (inTopLevelResize || surfaceGeometry.size() != tlwRect.size())
+    if (surfaceGeometry.size() != tlwRect.size())
         store->resize(tlwRect.size());
 
     if (updatesDisabled)

src/widgets/kernel/qwidgetwindow.cpp

@@ -764,7 +764,7 @@ void QWidgetWindow::repaintWindow()
         return;
 
     QTLWExtra *tlwExtra = m_widget->window()->d_func()->maybeTopData();
-    if (tlwExtra && !tlwExtra->inTopLevelResize && tlwExtra->backingStore)
+    if (tlwExtra && tlwExtra->backingStore)
         tlwExtra->repaintManager->markDirty(m_widget->rect(), m_widget,
                                                  QWidgetRepaintManager::UpdateNow, QWidgetRepaintManager::BufferInvalid);
 }