fix: colorpicker move on input (#656)

* Add copy code function to Color Picker

Signed-off-by: leewyatt <leewyatt7788@gmail.com>

* Modify to not return null and Fix #503

Signed-off-by: leewyatt <leewyatt7788@gmail.com>

* Add licenses and tests

Signed-off-by: leewyatt <leewyatt7788@gmail.com>

* update licenses

Signed-off-by: leewyatt <leewyatt7788@gmail.com>

* Remove extra blank lines, remove null

Signed-off-by: leewyatt <leewyatt7788@gmail.com>

* Update to JUnit 5 API

* Prevent ColorPicker area from moving on mouse scroll and keyboard inputs: The area was previously shifting due to ScrollPane default behaviors.

* Remove extraneous whitespace line

* Refactored code placement and added comments as per review feedback.

* Update kit/src/main/java/com/oracle/javafx/scenebuilder/kit/util/control/paintpicker/colorpicker/ColorPicker.java

Co-authored-by: José Pereda <jperedadnr@gmail.com>

* updated copyright

---------

Signed-off-by: leewyatt <leewyatt7788@gmail.com>
Co-authored-by: Almas Baimagambetov <almaslvl@gmail.com>
Co-authored-by: José Pereda <jperedadnr@gmail.com>

kit/src/main/java/com/oracle/javafx/scenebuilder/kit/util/control/paintpicker/colorpicker/ColorPicker.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2022, Gluon and/or its affiliates.
+ * Copyright (c) 2022, 2024, Gluon and/or its affiliates.
  * All rights reserved. Use is subject to license terms.
  *
  * This file is available and licensed under the following license:
@@ -38,6 +38,7 @@
 import com.oracle.javafx.scenebuilder.kit.util.control.paintpicker.gradientpicker.GradientPickerStop;
 import javafx.beans.value.ChangeListener;
 import javafx.event.ActionEvent;
+import javafx.event.Event;
 import javafx.fxml.FXML;
 import javafx.fxml.FXMLLoader;
 import javafx.geometry.Bounds;
@@ -48,7 +49,9 @@
 import javafx.scene.control.TextField;
 import javafx.scene.input.Clipboard;
 import javafx.scene.input.ClipboardContent;
+import javafx.scene.input.KeyEvent;
 import javafx.scene.input.MouseEvent;
+import javafx.scene.input.ScrollEvent;
 import javafx.scene.layout.Region;
 import javafx.scene.layout.StackPane;
 import javafx.scene.layout.VBox;
@@ -155,6 +158,7 @@ private void initialize() {
         assert green_textfield != null;
         assert blue_textfield != null;
         assert alpha_slider != null;
+        assert picker_scrollpane != null;
 
         hue_slider.setStyle(makeHueSliderCSS()); // Make the grad for hue slider
 
@@ -252,6 +256,11 @@ private void initialize() {
         picker_region.pressedProperty().addListener(liveUpdateListener);
         hue_slider.pressedProperty().addListener(liveUpdateListener);
         alpha_slider.pressedProperty().addListener(liveUpdateListener);
+
+        // Disable ColorPicker movement on focus, by blocking scroll and key (Home, End, PgUp, PgDn, arrows) events
+        picker_scrollpane.addEventFilter(KeyEvent.ANY, Event::consume);
+        picker_scrollpane.addEventFilter(ScrollEvent.SCROLL, Event::consume);
+
         // paint combobox add values
         paintCombobox.getItems().setAll(CSS_CODE, JAVA_CODE);
         paintCombobox.getSelectionModel().select(0);