[ToolTipManager] Create DolphinFileMetaDataWidget on-demand again

This reverts b7fbd19a7660424e6839df37f12b33111408b1fc but creates the
widget only once and then reuses it.

However, ownership of a parent-less widget is transferred to the
`KToolTipWidget` but since we first request metadata, then show the
tooltip (or won't if the mouse moved on since), we cannot rely on
the `KToolTipWidget` exclusively.

Instead, when we still delete the widget ourself until we have
shown the `KToolTipWidget` once at which point it will handle the
life time for us.

This fixes parenting the widget to `DolphinView` which would make
it appear as a broken line in the top left of the window.

1 files changed, 6 insertions, 1 deletions

diff --git a/src/views/tooltips/tooltipmanager.h b/src/views/tooltips/tooltipmanager.h
index 066393344..c86c97f6b 100644
--- a/src/views/tooltips/tooltipmanager.h
+++ b/src/views/tooltips/tooltipmanager.h
@@ -77,7 +77,12 @@ private:
     QWindow* m_transientParent;
 
     QScopedPointer<KToolTipWidget> m_tooltipWidget;
-    DolphinFileMetaDataWidget *m_fileMetaDataWidget;
+    DolphinFileMetaDataWidget *m_fileMetaDataWidget = nullptr;
+
+    /// Whether ownership of the metadata widget was transferred
+    /// over to the KToolTipWidget (i.e. we should not delete it
+    /// anymore)
+    bool m_fileMetaDatWidgetOwnershipTransferred = false;
 
     bool m_toolTipRequested;
     bool m_metaDataRequested;