QNX: Fix bug on window hierarchy list

removeFromParent() must not be called from raise()/lower(), because it wrongly
sets m_currentParent to 0, causing the parent/child link to be broken after a
call either of these methods.

This is a backport of
qtbase commit 4c33efc3228d82a82e13fe8c196b8c74a4998572

Change-Id: I5970cd2b2e0d58ef01dd99c10748195220d0e006
Reviewed-by: Sean Harmer <sean.harmer@kdab.com>

1 files changed, 6 insertions, 8 deletions

diff --git a/src/plugins/platforms/blackberry/qbbwindow.cpp b/src/plugins/platforms/blackberry/qbbwindow.cpp
index ff66534..07a2f91 100644
--- a/src/plugins/platforms/blackberry/qbbwindow.cpp
+++ b/src/plugins/platforms/blackberry/qbbwindow.cpp
@@ -518,10 +518,9 @@ void QBBWindow::raise()
     qDebug() << "QBBWindow::raise - w=" << widget();
 #endif
 
-    QBBWindow* oldParent = mParent;
-    if (oldParent) {
-        removeFromParent();
-        oldParent->mChildren.push_back(this);
+    if (mParent) {
+        mParent->mChildren.removeAll(this);
+        mParent->mChildren.push_back(this);
     } else {
         mScreen->raiseWindow(this);
     }
@@ -535,10 +534,9 @@ void QBBWindow::lower()
     qDebug() << "QBBWindow::lower - w=" << widget();
 #endif
 
-    QBBWindow* oldParent = mParent;
-    if (oldParent) {
-        removeFromParent();
-        oldParent->mChildren.push_front(this);
+    if (mParent) {
+        mParent->mChildren.removeAll(this);
+        mParent->mChildren.push_front(this);
     } else {
         mScreen->lowerWindow(this);
     }