Win touch option

src/java.desktop/share/classes/sun/awt/event/KeyEventProcessing.java

@@ -20,6 +20,11 @@ public class KeyEventProcessing {
     public final static boolean useLatinNonAlphaNumKeycodes = "true".equals(
             getProperty(useLatinNonAlphaNumKeycodesOption, "false"));
 
+    public final static String defaultTouchHandlingOption = "com.jetbrains.default.touchscreen.mode";
+
+    @Native
+    public final static boolean defaultTouchHandling = "true".equalsIgnoreCase(getProperty(defaultTouchHandlingOption, "false"));
+
     private static String getProperty(String option, String dflt) {
         return java.security.AccessController.doPrivileged(
                 (PrivilegedAction<String>) () -> System.getProperty(option, dflt)

src/java.desktop/windows/native/libawt/windows/awt_Component.cpp

@@ -1400,6 +1400,17 @@ static BOOL IsMouseEventFromTouch()
 {
     return (::GetMessageExtraInfo() & MOUSEEVENTF_FROMTOUCH_MASK) == MOUSEEVENTF_FROMTOUCH;
 }
+
+static BOOL IsDefaultTouch()
+{
+    JNIEnv *env = (JNIEnv *)JNU_GetEnv(jvm, JNI_VERSION_1_2);
+    jclass cls = env->FindClass("sun/awt/event/KeyEventProcessing");
+    CHECK_NULL_RETURN(cls, FALSE);
+    jfieldID fieldID = env->GetStaticFieldID(cls, "defaultTouchHandling", "Z");
+    CHECK_NULL_RETURN(fieldID, FALSE);
+    return static_cast<BOOL>(env->GetStaticBooleanField(cls, fieldID));
+}
+
 /*
  * Dispatch messages for this window class--general component
  */
@@ -1427,6 +1438,8 @@ LRESULT AwtComponent::WindowProc(UINT message, WPARAM wParam, LPARAM lParam)
 
     DWORD curPos = 0;
 
+    static const BOOL PROCESS_TOUCH_EVENTS = !IsDefaultTouch();
+
     UINT switchMessage = message;
     switch (switchMessage) {
       case WM_AWT_GETDC:
@@ -1716,7 +1729,7 @@ LRESULT AwtComponent::WindowProc(UINT message, WPARAM wParam, LPARAM lParam)
       case WM_MOUSEHWHEEL:
       case WM_AWT_MOUSEENTER:
       case WM_AWT_MOUSEEXIT:
-          if (IsMouseEventFromTouch()) {
+          if (IsMouseEventFromTouch() && PROCESS_TOUCH_EVENTS) {
               break;
           }
           curPos = ::GetMessagePos();
@@ -1796,8 +1809,10 @@ LRESULT AwtComponent::WindowProc(UINT message, WPARAM wParam, LPARAM lParam)
           }
           break;
       case WM_TOUCH:
-          WmTouch(wParam, lParam);
-          break;
+          if (PROCESS_TOUCH_EVENTS) {
+            WmTouch(wParam, lParam);
+            break;
+          }  
       case WM_SETCURSOR:
           mr = mrDoDefault;
           if (LOWORD(lParam) == HTCLIENT) {