QGuiApplication::focusObject() to replace QInputPanel::inputItem()

* Deprecated QInputPanel::inputWindow() which is already
  just returning QGuiApplication::activeWindow()
* Deprecated QInputPanel::inputItem() and introduced
  QGuiApplication::focusObject(). Input methods can check
  input method support by Qt::ImEnabled query.

Change-Id: I70a9c1c3f79aadb75c839d0489a9428f7a221df5
Reviewed-by: Joona Petrell <joona.t.petrell@nokia.com>

1 files changed, 31 insertions, 2 deletions

diff --git a/src/gui/kernel/qinputpanel.cpp b/src/gui/kernel/qinputpanel.cpp
index dbc12b04ba..76fc0139c7 100644
--- a/src/gui/kernel/qinputpanel.cpp
+++ b/src/gui/kernel/qinputpanel.cpp
@@ -41,6 +41,8 @@
 
 #include <qinputpanel.h>
 #include <private/qinputpanel_p.h>
+#include <qguiapplication.h>
+#include <qtimer.h>
 
 QT_BEGIN_NAMESPACE
 
@@ -50,6 +52,8 @@ QT_BEGIN_NAMESPACE
 QInputPanel::QInputPanel()
     : QObject(*new QInputPanelPrivate)
 {
+    // might be instantiated before QGuiApplication is fully done, need to connect later
+    QTimer::singleShot(0, this, SLOT(q_connectFocusObject()));
 }
 
 /*!
@@ -74,6 +78,7 @@ QInputPanel::~QInputPanel()
 /*!
     \property QInputPanel::inputItem
     \brief Focused item that accepts text input
+    \obsolete
 
     Input item is set and unset by the focused window. In QML Scene Graph this is done by
     QQuickCanvas and the input item is either TextInput or TextEdit element. Any QObject can
@@ -101,6 +106,8 @@ void QInputPanel::setInputItem(QObject *inputItem)
 
 /*!
     Returns the currently focused window containing the input item.
+
+    \obsolete
 */
 QWindow *QInputPanel::inputWindow() const
 {
@@ -288,8 +295,8 @@ void QInputPanel::update(Qt::InputMethodQueries queries)
 {
     Q_D(QInputPanel);
 
-    if (!d->inputItem)
-        return;
+    if (queries & Qt::ImEnabled)
+        d->q_checkFocusObject(qApp->focusObject());
 
     QPlatformInputContext *ic = d->platformInputContext();
     if (ic)
@@ -342,6 +349,28 @@ void QInputPanel::invokeAction(Action a, int cursorPosition)
         ic->invokeAction(a, cursorPosition);
 }
 
+// temporary handlers for updating focus item based on application focus
+void QInputPanelPrivate::q_connectFocusObject()
+{
+    Q_Q(QInputPanel);
+    QObject::connect(qApp, SIGNAL(focusObjectChanged(QObject*)),
+                     q, SLOT(q_checkFocusObject(QObject*)));
+    q_checkFocusObject(qApp->focusObject());
+}
+
+void QInputPanelPrivate::q_checkFocusObject(QObject *object)
+{
+    Q_Q(QInputPanel);
+
+    bool enabled = false;
+    if (object) {
+        QInputMethodQueryEvent query(Qt::ImEnabled);
+        QGuiApplication::sendEvent(object, &query);
+        enabled = query.value(Qt::ImEnabled).toBool();
+    }
+    q->setInputItem(enabled ? object : 0);
+}
+
 QT_END_NAMESPACE
 
 #include "moc_qinputpanel.cpp"