diff --git a/src/misc_gui.cpp b/src/misc_gui.cpp
--- a/src/misc_gui.cpp
+++ b/src/misc_gui.cpp
@@ -811,33 +811,6 @@ void QueryString::DrawEditBox(const Wind
 	_cur_dpi = old_dpi;
 }
 
-EventState QueryStringBaseWindow::HandleEditBoxKey(int wid, uint16 key, uint16 keycode)
-{
-	EventState state = ES_NOT_HANDLED;
-	switch (this->QueryString::HandleEditBoxKey(this, wid, key, keycode, state)) {
-		case HEBR_EDITING:
-			this->OnEditboxChanged(wid);
-			break;
-
-		case HEBR_CONFIRM:
-			if (this->ok_button >= 0) {
-				this->OnClick(Point(), this->ok_button, 1);
-			}
-			break;
-
-		case HEBR_CANCEL:
-			if (this->cancel_button >= 0) {
-				this->OnClick(Point(), this->cancel_button, 1);
-			} else {
-				this->UnfocusFocusedWidget();
-			}
-			break;
-
-		default: break;
-	}
-	return state;
-}
-
 /** Class for the string query window. */
 struct QueryStringWindow : public QueryStringBaseWindow
 {
diff --git a/src/querystring_gui.h b/src/querystring_gui.h
--- a/src/querystring_gui.h
+++ b/src/querystring_gui.h
@@ -77,8 +77,6 @@ struct QueryStringBaseWindow : public Wi
 	{
 		free(this->edit_str_buf);
 	}
-
-	EventState HandleEditBoxKey(int wid, uint16 key, uint16 keycode);
 };
 
 void ShowOnScreenKeyboard(QueryStringBaseWindow *parent, int button);
diff --git a/src/window.cpp b/src/window.cpp
--- a/src/window.cpp
+++ b/src/window.cpp
@@ -2234,6 +2234,46 @@ static bool MaybeBringWindowToFront(Wind
 }
 
 /**
+ * Process keypress for editbox widget.
+ * @param wid Editbox widget.
+ * @param key     the Unicode value of the key.
+ * @param keycode the untranslated key code including shift state.
+ * @return #ES_HANDLED if the key press has been handled and no other
+ *         window should receive the event.
+ */
+EventState Window::HandleEditBoxKey(int wid, uint16 key, uint16 keycode)
+{
+	EventState state = ES_NOT_HANDLED;
+
+	QueryString *query = dynamic_cast<QueryString*>(this);
+	if (query == NULL) return state;
+
+	switch (query->HandleEditBoxKey(this, wid, key, keycode, state)) {
+		case HEBR_EDITING:
+			this->OnEditboxChanged(wid);
+			break;
+
+		case HEBR_CONFIRM:
+			if (query->ok_button >= 0) {
+				this->OnClick(Point(), query->ok_button, 1);
+			}
+			break;
+
+		case HEBR_CANCEL:
+			if (query->cancel_button >= 0) {
+				this->OnClick(Point(), query->cancel_button, 1);
+			} else {
+				this->UnfocusFocusedWidget();
+			}
+			break;
+
+		default: break;
+	}
+
+	return state;
+}
+
+/**
  * Handle keyboard input.
  * @param raw_key Lower 8 bits contain the ASCII character, the higher 16 bits the keycode
  */
@@ -2267,8 +2307,7 @@ void HandleKeypress(uint32 raw_key)
 		if (_focused_window->window_class == WC_CONSOLE) {
 			if (_focused_window->OnKeyPress(key, keycode) == ES_HANDLED) return;
 		} else {
-			QueryStringBaseWindow *query = dynamic_cast<QueryStringBaseWindow*>(_focused_window);
-			if (query != NULL && query->HandleEditBoxKey(_focused_window->nested_focus->index, key, keycode) == ES_HANDLED) return;
+			if (_focused_window->HandleEditBoxKey(_focused_window->nested_focus->index, key, keycode) == ES_HANDLED) return;
 		}
 	}
 
diff --git a/src/window_gui.h b/src/window_gui.h
--- a/src/window_gui.h
+++ b/src/window_gui.h
@@ -458,6 +458,8 @@ public:
 	void UnfocusFocusedWidget();
 	bool SetFocusedWidget(byte widget_index);
 
+	EventState HandleEditBoxKey(int wid, uint16 key, uint16 keycode);
+
 	void HandleButtonClick(byte widget);
 	int GetRowFromWidget(int clickpos, int widget, int padding, int line_height = -1) const;