Merge pull request #331 from Unity-Technologies/zxw/fix_text_input_issue

fix text input bug

com.unity.uiwidgets/Runtime/gestures/converter.cs

@@ -207,8 +207,8 @@ namespace Unity.UIWidgets.gestures {
                                 keyBoardEvent.command = (datum.modifier & (1 << (int) FunctionKey.command)) > 0;
                                 keyBoardEvent.control = (datum.modifier & (1 << (int) FunctionKey.control)) > 0;
 #endif
-                                RawKeyboard.instance._handleKeyEvent(keyBoardEvent);
                                 TextInput.OnGUI();
+                                RawKeyboard.instance._handleKeyEvent(keyBoardEvent);
                             }
                             break;
                     }

com.unity.uiwidgets/Runtime/services/text_input.cs

@@ -3,6 +3,7 @@ using System.Collections.Generic;
 using Unity.UIWidgets.async;
 using Unity.UIWidgets.external.simplejson;
 using Unity.UIWidgets.foundation;
+using Unity.UIWidgets.gestures;
 using Unity.UIWidgets.services;
 using Unity.UIWidgets.ui;
 using UnityEngine;
@@ -748,9 +749,19 @@ namespace Unity.UIWidgets.service {
             }
         }
 
-        internal static void OnGUI() {
+        internal static bool OnGUI() {
             if (_currentConnection != null && _currentConnection._window == Window.instance) {
                 (keyboardDelegate as TextInputOnGUIListener)?.OnGUI();
+
+                return true;
+            }
+            else {
+                //skip all the key events when no connection is attached
+                while (!PointerEventConverter.KeyEvent.isEmpty()) {
+                    PointerEventConverter.KeyEvent.Dequeue();
+                }
+
+                return false;
             }
         }