Refactor InputObject(EventFilter and VirtualKeyboard).

src/keyboard/KeyboardManager.cpp

@@ -0,0 +1,23 @@
+#include "KeyboardManager.h"
+
+#include "KeyboardPanel.h"
+
+KeyboardManager* KeyboardManager::getInstance()
+{
+    static KeyboardManager instance;
+    return &instance;
+}
+
+KeyboardManager::KeyboardManager()
+    : mKeyboardPanel(new KeyboardPanel())
+{
+}
+
+KeyboardManager::~KeyboardManager()
+{
+}
+
+void KeyboardManager::showKeyboardPanel(QWidget* aInputWidget)
+{
+    mKeyboardPanel->showPanel(aInputWidget);
+}