Fix input panel event propagation

inputcontext/QskInputCompositionModel.cpp

@@ -37,20 +37,20 @@ static QString qskKeyString( int code )
 class QskInputCompositionModel::PrivateData
 {
 public:
+    PrivateData() :
+        inputItem( nullptr ),
+        groupIndex( 0 )
+    {
+    }
     // QInputMethod
     QString preedit;
     QTextCharFormat preeditFormat;
     QList< QInputMethodEvent::Attribute > preeditAttributes;
 
+    QObject* inputItem;
     int groupIndex;
 };
 
-static inline void sendCompositionEvent( QInputMethodEvent* e )
-{
-    if ( auto focusObject = QGuiApplication::focusObject() )
-        QCoreApplication::sendEvent( focusObject, e );
-}
-
 QskInputCompositionModel::QskInputCompositionModel():
     m_data( new PrivateData )
 {
@@ -77,7 +77,7 @@ void QskInputCompositionModel::composeKey( Qt::Key key )
 
     QInputMethodQueryEvent queryEvent(
         Qt::ImSurroundingText | Qt::ImMaximumTextLength | Qt::ImHints );
-    QCoreApplication::sendEvent( focusObject, &queryEvent );
+    QCoreApplication::sendEvent( m_data->inputItem, &queryEvent );
     const auto hints = static_cast< Qt::InputMethodHints >(
             queryEvent.value( Qt::ImHints ).toInt() );
     const int maxLength = queryEvent.value( Qt::ImMaximumTextLength ).toInt();
@@ -237,8 +237,8 @@ void QskInputCompositionModel::backspace()
         // Backspace one character only if preedit was inactive
         QKeyEvent keyPress( QEvent::KeyPress, Qt::Key_Backspace, Qt::NoModifier );
         QKeyEvent keyRelease( QEvent::KeyRelease, Qt::Key_Backspace, Qt::NoModifier );
-        QCoreApplication::sendEvent( focusWindow, &keyPress );
-        QCoreApplication::sendEvent( focusWindow, &keyRelease );
+        QCoreApplication::sendEvent( m_data->inputItem, &keyPress );
+        QCoreApplication::sendEvent( m_data->inputItem, &keyRelease );
         return;
     }
 
@@ -267,6 +267,12 @@ void QskInputCompositionModel::moveCursor( Qt::Key key )
     QCoreApplication::sendEvent( focusWindow, &moveCursorRelease );
 }
 
+void QskInputCompositionModel::sendCompositionEvent( QInputMethodEvent* e )
+{
+    if ( m_data->inputItem )
+        QCoreApplication::sendEvent( m_data->inputItem, e );
+}
+
 bool QskInputCompositionModel::hasIntermediate() const
 {
     return false;
@@ -300,6 +306,11 @@ QVector< Qt::Key > QskInputCompositionModel::groups() const
     return QVector< Qt::Key >();
 }
 
+void QskInputCompositionModel::setInputItem( QObject *inputItem )
+{
+    m_data->inputItem = inputItem;
+}
+
 bool QskInputCompositionModel::nextGroupIndex(int& index, bool forward) const
 {
     Q_UNUSED(index);

inputcontext/QskInputCompositionModel.h

@@ -10,6 +10,7 @@
 
 #include <memory>
 
+class QInputMethodEvent;
 class QStringList;
 
 class QskInputCompositionModel : public QObject
@@ -37,6 +38,8 @@ public:
 
     virtual QVector< Qt::Key > groups() const;
 
+    void setInputItem( QObject* inputItem );
+
 protected:
     // Used for text composition
     virtual bool hasIntermediate() const;
@@ -50,6 +53,7 @@ Q_SIGNALS:
 private:
     void backspace();
     void moveCursor( Qt::Key key );
+    void sendCompositionEvent( QInputMethodEvent* e );
 
     class PrivateData;
     std::unique_ptr< PrivateData > m_data;

inputcontext/QskInputContext.cpp

@@ -26,6 +26,8 @@ QskInputContext::QskInputContext():
     connect( qskSetup, &QskSetup::inputPanelChanged,
         this, &QskInputContext::setInputPanel );
     setInputPanel( qskSetup->inputPanel() );
+
+    m_inputCompositionModel.reset( new QskInputCompositionModel );
 }
 
 QskInputContext::~QskInputContext()
@@ -41,11 +43,11 @@ bool QskInputContext::isValid() const
 
 void QskInputContext::update( Qt::InputMethodQueries queries )
 {
-    if ( !m_focusObject )
+    if ( !m_inputItem )
         return;
 
     QInputMethodQueryEvent queryEvent( queries );
-    if ( !QCoreApplication::sendEvent( m_focusObject, &queryEvent ) )
+    if ( !QCoreApplication::sendEvent( m_inputItem, &queryEvent ) )
         return;
 
     // Qt::ImCursorRectangle
@@ -209,18 +211,39 @@ void QskInputContext::setFocusObject( QObject* focusObject )
 
     m_focusObject = focusObject;
     if ( !m_focusObject )
-        return;
-
-    QInputMethodQueryEvent queryEvent( Qt::ImEnabled );
-    if ( !QCoreApplication::sendEvent( m_focusObject, &queryEvent ) )
-        return;
-
-    if ( !queryEvent.value( Qt::ImEnabled ).toBool() )
     {
-        hideInputPanel();
+        m_inputItem = nullptr;
+        m_inputCompositionModel->setInputItem( nullptr );
         return;
     }
 
+    bool inputItemChanged = false;
+
+    auto focusQuickItem = qobject_cast< QQuickItem* >( focusObject );
+    if( focusQuickItem )
+    {
+        // Do not change the input item when panel buttons get the focus:
+        if( qskNearestFocusScope( focusQuickItem ) != m_inputPanel )
+        {
+            m_inputItem = focusQuickItem;
+            m_inputCompositionModel->setInputItem( m_inputItem ); // ### use a signal/slot connection
+            inputItemChanged = true;
+        }
+    }
+
+    if( inputItemChanged )
+    {
+        QInputMethodQueryEvent queryEvent( Qt::ImEnabled );
+        if ( !QCoreApplication::sendEvent( m_inputItem, &queryEvent ) )
+            return;
+
+        if ( !queryEvent.value( Qt::ImEnabled ).toBool() )
+        {
+            hideInputPanel();
+            return;
+        }
+    }
+
     m_focusObject->installEventFilter( this );
     update( Qt::InputMethodQuery( Qt::ImQueryAll & ~Qt::ImEnabled ) );
 }

inputcontext/QskInputContext.h

@@ -8,6 +8,7 @@
 
 #include <qpa/qplatforminputcontext.h>
 #include <QPointer>
+#include <QQuickItem>
 
 #include <memory>
 
@@ -45,6 +46,7 @@ private Q_SLOTS:
 
 private:
     QPointer< QObject > m_focusObject;
+    QPointer< QQuickItem > m_inputItem;
     QPointer< QskInputPanel > m_inputPanel;
     std::unique_ptr< QskInputCompositionModel > m_inputCompositionModel;
 };

playground/inputpanel/TextInput.cpp

@@ -10,3 +10,8 @@ TextInput::~TextInput()
 {
 
 }
+
+void TextInput::inputMethodEvent(QInputMethodEvent *event)
+{
+    QQuickTextInput::inputMethodEvent(event);
+}

playground/inputpanel/TextInput.h

@@ -7,7 +7,10 @@ class TextInput : public QQuickTextInput
 {
     public:
         TextInput( QQuickItem* parent );
-        virtual ~TextInput();
+        virtual ~TextInput() override;
+
+protected:
+        void inputMethodEvent(QInputMethodEvent *) Q_DECL_OVERRIDE;
 };
 
 #endif // TEXTINPUT_H

src/controls/QskInputPanel.cpp

@@ -148,8 +148,6 @@ QskKeyButton::QskKeyButton( int keyIndex, QskInputPanel* inputPanel, QQuickItem*
     m_keyIndex( keyIndex ),
     m_inputPanel( inputPanel )
 {
-    setFlag( QQuickItem::ItemAcceptsInputMethod );
-
     updateText();
 
     connect( this, &QskKeyButton::pressed, this, [ this ]()
@@ -248,6 +246,9 @@ QskInputPanel::QskInputPanel( QQuickItem* parent ):
 
     QObject::connect( this, &QskControl::localeChanged,
                       this, &QskInputPanel::updateLocale );
+
+    setFlag( ItemIsFocusScope, true );
+    setTabFence( true );
 }
 
 QskInputPanel::~QskInputPanel()