Delay showing keyboard until application is active

Android starts asking lots of questions when the software keyboard
pops up, so let's wait until the application is initialized. This
works around a deadlock on startup.

Task-number: QTBUG-41369
Change-Id: I1c79e32d08c7cc11748ec55efbff3bc25e40f4b2
Reviewed-by: Christian Stromme <christian.stromme@digia.com>

2 files changed, 15 insertions, 0 deletions

diff --git a/src/plugins/platforms/android/qandroidinputcontext.cpp b/src/plugins/platforms/android/qandroidinputcontext.cpp
index ca9d1e69c9..e3d488b958 100644
--- a/src/plugins/platforms/android/qandroidinputcontext.cpp
+++ b/src/plugins/platforms/android/qandroidinputcontext.cpp
@@ -519,6 +519,10 @@ bool QAndroidInputContext::isAnimating() const
 
 void QAndroidInputContext::showInputPanel()
 {
+    if (QGuiApplication::applicationState() != Qt::ApplicationActive) {
+        connect(qGuiApp, SIGNAL(applicationStateChanged(Qt::ApplicationState)), this, SLOT(showInputPanelLater(Qt::ApplicationState)));
+        return;
+    }
     QSharedPointer<QInputMethodQueryEvent> query = focusObjectInputMethodQueryThreadSafe();
     if (query.isNull())
         return;
@@ -541,6 +545,14 @@ void QAndroidInputContext::showInputPanel()
                                          query->value(Qt::ImHints).toUInt());
 }
 
+void QAndroidInputContext::showInputPanelLater(Qt::ApplicationState state)
+{
+    if (state != Qt::ApplicationActive)
+        return;
+    disconnect(qGuiApp, SIGNAL(applicationStateChanged(Qt::ApplicationState)), this, SLOT(showInputPanelLater(Qt::ApplicationState)));
+    showInputPanel();
+}
+
 void QAndroidInputContext::hideInputPanel()
 {
     QtAndroidInput::hideSoftwareKeyboard();
diff --git a/src/plugins/platforms/android/qandroidinputcontext.h b/src/plugins/platforms/android/qandroidinputcontext.h
index 670a051139..2ebb155d2a 100644
--- a/src/plugins/platforms/android/qandroidinputcontext.h
+++ b/src/plugins/platforms/android/qandroidinputcontext.h
@@ -112,6 +112,9 @@ public:
 public slots:
     void updateCursorPosition();
 
+private slots:
+    void showInputPanelLater(Qt::ApplicationState);
+
 private:
     void sendInputMethodEventThreadSafe(QInputMethodEvent *event);
     Q_INVOKABLE void sendInputMethodEventUnsafe(QInputMethodEvent *event);