[#344] Fire change when opacity has changed

core/src/main/java/com/github/weisj/darklaf/ui/colorchooser/ColorTriangle.java

@@ -262,8 +262,9 @@ public class ColorTriangle extends JComponent {
         return opacity;
     }
 
-    public void setOpacity(final double opacity) {
+    public void setOpacity(final Object source, final double opacity) {
         this.opacity = opacity;
+        fireColorChanged(source);
     }
 
     public int[] getValuesForModel(final DarkColorModel model) {

core/src/main/java/com/github/weisj/darklaf/ui/colorchooser/ColorWheelPanel.java

@@ -49,7 +49,7 @@ public class ColorWheelPanel extends JPanel {
             opacitySlider.setToolTipText("Opacity");
             opacitySlider.setUnits(opacityInPercent ? SlideComponent.Unit.PERCENT : SlideComponent.Unit.LEVEL);
             opacitySlider.addListener(integer -> {
-                colorWheel.setOpacity(integer / 255.0);
+                colorWheel.setOpacity(opacitySlider, integer / 255.0);
                 ColorWheelPanel.this.repaint();
             });
             add(opacitySlider, BorderLayout.SOUTH);