controlsfx#1283 Add revalidate method (controlsfx#1292)

(cherry picked from commit dd11dc9)

controlsfx/src/main/java/org/controlsfx/validation/ValidateEvent.java

@@ -0,0 +1,40 @@
+/**
+ * Copyright (c) 2020, ControlsFX
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *     * Neither the name of ControlsFX, any associated website, nor the
+ * names of its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL CONTROLSFX BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+package org.controlsfx.validation;
+
+import javafx.event.Event;
+import javafx.event.EventType;
+
+public class ValidateEvent extends Event {
+    private static final long serialVersionUID = 1L;
+
+    public static final EventType<Event> EVENT_TYPE = new EventType<>("VALIDATE_EVENT");
+
+    public ValidateEvent() {
+        super(EVENT_TYPE);
+    }
+}

controlsfx/src/main/java/org/controlsfx/validation/ValidationSupport.java

@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2014, 2015, ControlsFX
+ * Copyright (c) 2014, 2015, 2020, ControlsFX
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -159,6 +159,24 @@ public void redecorate() {
             });
         }
     }
+
+    /**
+     * Triggers validation for all known components.
+     * It is only necessary to call this if it is needed to revalidate even if the value of the control has not changed.
+     */
+    public void revalidate() {
+        for (Control target : getRegisteredControls()) {
+            target.fireEvent(new ValidateEvent());
+        }
+    }
+
+    /**
+     * Triggers validation for the given component.
+     * It is only necessary to call this if it is needed to revalidate even if the value of the control has not changed.
+     */
+    public void revalidate(Control c) {
+        c.fireEvent(new ValidateEvent());
+    }
 
     private BooleanProperty errorDecorationEnabledProperty = new SimpleBooleanProperty(true) {
     	protected void invalidated() {
@@ -292,6 +310,7 @@ public void onChanged(
             	dataChanged.set(true);
             	updateResults.accept(newValue);
             });
+            c.addEventHandler(ValidateEvent.EVENT_TYPE, event -> updateResults.accept(observable.getValue()));
             updateResults.accept(observable.getValue());
 
             return e;