QWizard/Win: Support RTL layout in Aero style

Task-number: QTBUG-30462
Change-Id: Ie6b3ba4975542a9d92611eb9a8547215e41d3c2c
(cherry picked from qtbase/6f0dc9f4c7c1405bdbfef32395d0fb091bb0c8c8)
Reviewed-by: Ahmed Saidi <justroftest@gmail.com>
Reviewed-by: Giuseppe D'Angelo <giuseppe.dangelo@kdab.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>

2 files changed, 25 insertions, 3 deletions

diff --git a/src/gui/dialogs/qwizard.cpp b/src/gui/dialogs/qwizard.cpp
index a2f3c50..fbc7a79 100644
--- a/src/gui/dialogs/qwizard.cpp
+++ b/src/gui/dialogs/qwizard.cpp
@@ -3159,6 +3159,16 @@ bool QWizard::event(QEvent *event)
         d->handleAeroStyleChange();
     }
     else if (d->isVistaThemeEnabled()) {
+        if (event->type() == QEvent::Resize
+                || event->type() == QEvent::LayoutDirectionChange) {
+            const int buttonLeft = (layoutDirection() == Qt::RightToLeft
+                                    ? width() - d->vistaHelper->backButton()->sizeHint().width()
+                                    : 0);
+
+            d->vistaHelper->backButton()->move(buttonLeft,
+                                               d->vistaHelper->backButton()->y());
+        }
+
         d->vistaHelper->mouseEvent(event);
     }
 #endif
diff --git a/src/gui/dialogs/qwizard_win.cpp b/src/gui/dialogs/qwizard_win.cpp
index b933f3b..51cb9d5 100644
--- a/src/gui/dialogs/qwizard_win.cpp
+++ b/src/gui/dialogs/qwizard_win.cpp
@@ -231,7 +231,11 @@ void QVistaBackButton::paintEvent(QPaintEvent *)
     else if (underMouse())
         state = WIZ_NAV_BB_HOT;
 
-   pDrawThemeBackground(theme, p.paintEngine()->getDC(), WIZ_NAV_BACKBUTTON, state, &clipRect, &clipRect); 
+    WIZ_NAVIGATIONPARTS buttonType = (layoutDirection() == Qt::LeftToRight
+                                      ? WIZ_NAV_BACKBUTTON
+                                      : WIZ_NAV_FORWARDBUTTON);
+
+   pDrawThemeBackground(theme, p.paintEngine()->getDC(), buttonType, state, &clipRect, &clipRect);
 }
 
 /******************************************************************************
@@ -348,13 +352,21 @@ void QVistaHelper::drawTitleBar(QPainter *painter)
         glowOffset = glowSize();
     }
 
+    const int titleLeft = (wizard->layoutDirection() == Qt::LeftToRight
+                           ? titleOffset() - glowOffset
+                           : wizard->width() - titleOffset() - textWidth + glowOffset);
+
     drawTitleText(
         painter, text,
-        QRect(titleOffset() - glowOffset, verticalCenter - textHeight / 2, textWidth, textHeight),
+        QRect(titleLeft, verticalCenter - textHeight / 2, textWidth, textHeight),
         hdc);
 
     if (!wizard->windowIcon().isNull()) {
-        QRect rect(leftMargin(), verticalCenter - iconSize() / 2, iconSize(), iconSize());
+        const int iconLeft = (wizard->layoutDirection() == Qt::LeftToRight
+                              ? leftMargin()
+                              : wizard->width() - leftMargin() - iconSize());
+
+        QRect rect(iconLeft, verticalCenter - iconSize() / 2, iconSize(), iconSize());
         HICON hIcon = wizard->windowIcon().pixmap(iconSize()).toWinHICON();
         DrawIconEx(hdc, rect.left(), rect.top(), hIcon, 0, 0, 0, NULL, DI_NORMAL | DI_COMPAT);
         DestroyIcon(hIcon);