Fix simpleqml example

- Reset source when window changes because it will cause new renderer to be
created and it would not have proper source without it.
- Update the example codes and resources
- Change how the init timer is initialized to get proper result each time
  the presentation gets reloaded.

Task-number: QT3DS-3681
Change-Id: I64d4f6980b87b6efcbb906bb4ad241956ce0a7bc
Reviewed-by: Tomi Korpipää <tomi.korpipaa@qt.io>
Reviewed-by: Miikka Heikkinen <miikka.heikkinen@qt.io>

1 files changed, 2 insertions, 1 deletions

diff --git a/src/engine/Qt3DSRuntimeView.cpp b/src/engine/Qt3DSRuntimeView.cpp
index c1f3b3d..90a2562 100644
--- a/src/engine/Qt3DSRuntimeView.cpp
+++ b/src/engine/Qt3DSRuntimeView.cpp
@@ -260,6 +260,7 @@ CRuntimeView::~CRuntimeView()
 bool CRuntimeView::BeginLoad(const QString &sourcePath, const QStringList &variantList)
 {
     bool theResult = false;
+    m_startupTime = -1;
 
     // boot up the application
     BootupPreGraphicsInitObjects();
@@ -372,7 +373,7 @@ void CRuntimeView::Render()
 
     m_Application->UpdateAndRender();
 
-    if (m_startupTime < 0 && m_startupTimer) {
+    if (m_startupTime < 0 && m_startupTimer && m_startupTimer->isValid()) {
         m_startupTime = m_startupTimer->elapsed();
         m_startupTimer->invalidate();
     }