Fix focus handling in android manifest editor

If focus gets set on the editor widget, either the current focus widget
of the current page (gui/text) should receive application focus, or the
page itself (where the gui page should defer that to its first input
widget).

Change-Id: I8a35c2e9ca06fe694069b594788f7f40307abbda
Reviewed-by: Vikas Pachdha <vikas.pachdha@qt.io>

src/plugins/android/androidmanifesteditorwidget.cpp

@@ -462,6 +462,7 @@ void AndroidManifestEditorWidget::initializePage()
     QScrollArea *mainWidgetScrollArea = new QScrollArea;
     mainWidgetScrollArea->setWidgetResizable(true);
     mainWidgetScrollArea->setWidget(mainWidget);
+    mainWidgetScrollArea->setFocusProxy(m_packageNameLineEdit);
 
     insertWidget(General, mainWidgetScrollArea);
     insertWidget(Source, m_textEditorWidget);
@@ -477,6 +478,16 @@ bool AndroidManifestEditorWidget::eventFilter(QObject *obj, QEvent *event)
     return QWidget::eventFilter(obj, event);
 }
 
+void AndroidManifestEditorWidget::focusInEvent(QFocusEvent *event)
+{
+    if (currentWidget()) {
+        if (currentWidget()->focusWidget())
+            currentWidget()->focusWidget()->setFocus(event->reason());
+        else
+            currentWidget()->setFocus(event->reason());
+    }
+}
+
 void AndroidManifestEditorWidget::updateTargetComboBox()
 {
     Project *project = androidProject(m_textEditorWidget->textDocument()->filePath());

src/plugins/android/androidmanifesteditorwidget.h

@@ -112,6 +112,7 @@ signals:
 
 protected:
     bool eventFilter(QObject *obj, QEvent *event);
+    void focusInEvent(QFocusEvent *event);
 
 private:
     void setLDPIIcon();