Add printRequest()

Adds printRequested() signal for web content. This signal
is emitted on javascript window.print().

This change updates also qt printview manager implementation,
fixes a corner case and warnings about ipc unconsumed attachments.

Task-number: QTBUG-69237
Task-number: QTBUG-53745
Change-Id: I0c47b732e27e929ac6db237fb562b7d5f9b959c2
Reviewed-by: Michael Brüning <michael.bruning@qt.io>

1 files changed, 18 insertions, 0 deletions

diff --git a/src/webenginewidgets/api/qwebenginepage.cpp b/src/webenginewidgets/api/qwebenginepage.cpp
index 16a9c138d..5b42b871a 100644
--- a/src/webenginewidgets/api/qwebenginepage.cpp
+++ b/src/webenginewidgets/api/qwebenginepage.cpp
@@ -739,6 +739,16 @@ QWebEnginePage::QWebEnginePage(QObject* parent)
 }
 
 /*!
+    \fn void QWebEnginePage::printRequested()
+    \since 5.12
+
+    This signal is emitted when the JavaScript \c{window.print()} method is called.
+    Typically, the signal handler can simply call printToPdf().
+
+    \sa printToPdf()
+*/
+
+/*!
     \enum QWebEnginePage::RenderProcessTerminationStatus
     \since 5.6
 
@@ -1751,6 +1761,14 @@ void QWebEnginePagePrivate::setToolTip(const QString &toolTipText)
         view->setToolTip(wrappedTip);
 }
 
+void QWebEnginePagePrivate::printRequested()
+{
+    Q_Q(QWebEnginePage);
+    QTimer::singleShot(0, q, [q](){
+        Q_EMIT q->printRequested();
+    });
+}
+
 #if QT_CONFIG(menu)
 QMenu *QWebEnginePage::createStandardContextMenu()
 {