When Japanse (IME on) is inputted to the TextFIeld, which is on JFXPanel, small window for inputting appears on top-left side of screen
 For swing-interop case, WmImeStartComposition starts composition in native ImmSetCompositionWindow window as "m_useNativeCompWindow" below is true for FX https://github.com/openjdk/jdk/blob/514816ed7d7dea1fb13d32b80aef89774bee13d3/src/java.desktop/windows/native/libawt/windows/awt_Component.cpp#L3957 m_useNativeCompWindow is true because during sun.awt.im.InputContext#focusGained() calls activateInputMethod which calls WInputMethod.activate() which calls haveActiveClient() which checks for clientComponent.getInputMethodRequests(). Now, in JFXPanel, getInputMethodRequests() returns null as setEmbeddedScene() is not called yet. Since getInputMethodRequests() returns null, haveActiveClient() is false which calls enableNativeIME() with 1 [thereby native composition window is enabled] https://github.com/openjdk/jdk/blob/514816ed7d7dea1fb13d32b80aef89774bee13d3/src/java.desktop/windows/classes/sun/awt/windows/WInputMethod.java#L316 Proposed fix is to ensure there is an active client "initially" so that enableNativeIME() is called with 0 and no native compostion window is shown. getInputMethodRequests() is called in setEmbeddedScene() so as to make sure getInputMethodRequest() is initialised to correct "InputMethodSupport.InputMethodRequestsAdapter.fxRequests" object and not NULL. AFter fix  ------------- Commit messages: - 8090267: JFXPanel Input Problem Changes: https://git.openjdk.org/jfx/pull/1169/files Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1169&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8090267 Stats: 2 lines in 1 file changed: 1 ins; 0 del; 1 mod Patch: https://git.openjdk.org/jfx/pull/1169.diff Fetch: git fetch https://git.openjdk.org/jfx.git pull/1169/head:pull/1169 PR: https://git.openjdk.org/jfx/pull/1169
