MimeTypeBrowser: avoid memleaks

In MainWindow ctor some member values were allocated without a parent
and not cleaned up in dtor. Fixed it by give them a valid parent so they
get automatically cleaned up. Also m_treeView was initialized twice.

Task-number: QTBUG-61862
Change-Id: I5590b87bb517c55db6eb58e700a5d419c0acdba2
Reviewed-by: Topi Reiniö <topi.reinio@qt.io>
Reviewed-by: Martin Smith <martin.smith@qt.io>

1 files changed, 3 insertions, 4 deletions

diff --git a/examples/corelib/mimetypes/mimetypebrowser/mainwindow.cpp b/examples/corelib/mimetypes/mimetypebrowser/mainwindow.cpp
index 1d36b7e5ef..bc7ec17d1c 100644
--- a/examples/corelib/mimetypes/mimetypebrowser/mainwindow.cpp
+++ b/examples/corelib/mimetypes/mimetypebrowser/mainwindow.cpp
@@ -72,8 +72,8 @@
 MainWindow::MainWindow(QWidget *parent)
     : QMainWindow(parent)
     , m_model(new MimetypeModel(this))
-    , m_treeView(new QTreeView)
-    , m_detailsText(new QTextEdit)
+    , m_treeView(new QTreeView(this))
+    , m_detailsText(new QTextEdit(this))
     , m_findIndex(0)
 {
     setWindowTitle(tr("Qt Mime Database Browser"));
@@ -97,9 +97,8 @@ MainWindow::MainWindow(QWidget *parent)
 
     menuBar()->addMenu(tr("&About"))->addAction(tr("&About Qt"), qApp, &QApplication::aboutQt);
 
-    QSplitter *centralSplitter = new QSplitter;
+    QSplitter *centralSplitter = new QSplitter(this);
     setCentralWidget(centralSplitter);
-    m_treeView = new QTreeView;
     m_treeView->setUniformRowHeights(true);
     m_treeView->setModel(m_model);