Implement page lifecycle API

[ChangeLog][QtWebEngine][WebEngineView] WebEngineView now supports lifecycle
states that can be used for reducing CPU and memory consumption of invisible
views.
[ChangeLog][QtWebEngineWidgets][QWebEnginePage] QWebEnginePage now supports
lifecycle states that can be used for reducing CPU and memory consumption of
invisible pages.

Fixes: QTBUG-74166
Fixes: QTBUG-55079
Change-Id: I7d70c85dc995bd17c9fe91385a8e2750dbc0a627
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@qt.io>
Reviewed-by: Peter Varga <pvarga@inf.u-szeged.hu>
 
 
 

1 files changed, 12 insertions, 2 deletions

diff --git a/src/webenginewidgets/api/qwebengineview.cpp b/src/webenginewidgets/api/qwebengineview.cpp
index 6c08df343..ac979e766 100644
--- a/src/webenginewidgets/api/qwebengineview.cpp
+++ b/src/webenginewidgets/api/qwebengineview.cpp
@@ -378,7 +378,7 @@ void QWebEngineView::contextMenuEvent(QContextMenuEvent *event)
 void QWebEngineView::showEvent(QShowEvent *event)
 {
     QWidget::showEvent(event);
-    page()->d_ptr->wasShown();
+    page()->setVisible(true);
 }
 
 /*!
@@ -387,7 +387,17 @@ void QWebEngineView::showEvent(QShowEvent *event)
 void QWebEngineView::hideEvent(QHideEvent *event)
 {
     QWidget::hideEvent(event);
-    page()->d_ptr->wasHidden();
+    page()->setVisible(false);
+}
+
+/*!
+ * \reimp
+ */
+void QWebEngineView::closeEvent(QCloseEvent *event)
+{
+    QWidget::closeEvent(event);
+    page()->setVisible(false);
+    page()->setLifecycleState(QWebEnginePage::LifecycleState::Discarded);
 }
 
 #if QT_CONFIG(draganddrop)