AnimatedPainter:

- renamed `getValues()` to `getAnimatableValues()`
- renamed `getClientPropertyKey()` to `getAnimationClientPropertyKey()`
- AnimatedPainterSupport improvements

flatlaf-core/src/main/java/com/formdev/flatlaf/util/AnimatedBorder.java

@@ -25,10 +25,12 @@ import javax.swing.border.Border;
 /**
  * Border that automatically animates painting on component value changes.
  * <p>
- * {@link #getValues(Component)} returns the value(s) of the component.
+ * {@link #getAnimatableValues(Component)} returns the animatable value(s) of the component.
  * If the value(s) have changed, then {@link #paintAnimated(Component, Graphics2D, int, int, int, int, float[])}
  * is invoked multiple times with animated value(s) (from old value(s) to new value(s)).
- * If {@link #getValues(Component)} returns multiple values, then each value gets its own independent animation.
+ * If {@link #getAnimatableValues(Component)} returns multiple values, then each value
+ * gets its own independent animation, which may start/end at different points in time,
+ * may have different duration, resolution and interpolator.
  * <p>
  * Example for an animated border:
  * <pre>
@@ -36,6 +38,11 @@ import javax.swing.border.Border;
  *     implements AnimatedBorder
  * {
  *     &#64;Override
+ *     public float[] getAnimatableValues( Component c ) {
+ *         return new float[] { c.isFocusOwner() ? 1 : 0 };
+ *     }
+ *
+ *     &#64;Override
  *     public void paintAnimated( Component c, Graphics2D g, int x, int y, int width, int height, float[] animatedValues ) {
  *         int lh = UIScale.scale( 2 );
  *
@@ -44,11 +51,6 @@ import javax.swing.border.Border;
  *     }
  *
  *     &#64;Override
- *     public float[] getValues( Component c ) {
- *         return new float[] { c.isFocusOwner() ? 1 : 0 };
- *     }
- *
- *     &#64;Override
  *     public Insets getBorderInsets( Component c ) {
  *         return UIScale.scale( new Insets( 4, 4, 4, 4 ) );
  *     }

flatlaf-core/src/main/java/com/formdev/flatlaf/util/AnimatedIcon.java

@@ -25,16 +25,23 @@ import javax.swing.JComponent;
 /**
  * Icon that automatically animates painting on component value changes.
  * <p>
- * {@link #getValues(Component)} returns the value(s) of the component.
+ * {@link #getAnimatableValues(Component)} returns the animatable value(s) of the component.
  * If the value(s) have changed, then {@link #paintAnimated(Component, Graphics2D, int, int, int, int, float[])}
  * is invoked multiple times with animated value(s) (from old value(s) to new value(s)).
- * If {@link #getValues(Component)} returns multiple values, then each value gets its own independent animation.
+ * If {@link #getAnimatableValues(Component)} returns multiple values, then each value
+ * gets its own independent animation, which may start/end at different points in time,
+ * may have different duration, resolution and interpolator.
  * <p>
  * Example for an animated icon:
  * <pre>
  * private class MyAnimatedIcon
  *     implements AnimatedIcon
  * {
+ *     &#64;Override
+ *     public float[] getAnimatableValues( Component c ) {
+ *         return new float[] { ((AbstractButton)c).isSelected() ? 1 : 0 };
+ *     }
+ *
  *     &#64;Override public int getIconWidth() { return 100; }
  *     &#64;Override public int getIconHeight() { return 20; }
  *
@@ -44,11 +51,6 @@ import javax.swing.JComponent;
  *         g.drawRect( x, y, width - 1, height - 1 );
  *         g.fillRect( x, y, Math.round( width * animatedValues[0] ), height );
  *     }
- *
- *     &#64;Override
- *     public float[] getValues( Component c ) {
- *         return new float[] { ((AbstractButton)c).isSelected() ? 1 : 0 };
- *     }
  * }
  *
  * // sample usage
@@ -57,7 +59,7 @@ import javax.swing.JComponent;
  * </pre>
  *
  * Animation works only if the component passed to {@link #paintIcon(Component, Graphics, int, int)}
- * is a instance of {@link JComponent}.
+ * is an instance of {@link JComponent}.
  * A client property is set on the component to store the animation state.
  *
  * @author Karl Tauber
@@ -65,6 +67,17 @@ import javax.swing.JComponent;
 public interface AnimatedIcon
 	extends Icon, AnimatedPainter
 {
+	/**
+	 * {@inheritDoc}
+	 *
+	 * @since 2
+	 */
+	@Override
+	default float[] getAnimatableValues( Component c ) {
+		// for compatibility
+		return new float[] { getValue( c ) };
+	}
+
 	/**
 	 * Invokes {@link #paintWithAnimation(Component, Graphics, int, int, int, int)}.
 	 */
@@ -80,6 +93,7 @@ public interface AnimatedIcon
 	 */
 	@Override
 	default void paintAnimated( Component c, Graphics2D g, int x, int y, int width, int height, float[] animatedValues ) {
+		// for compatibility
 		paintIconAnimated( c, g, x, y, animatedValues[0] );
 	}
 
@@ -101,30 +115,41 @@ public interface AnimatedIcon
 	}
 
 	/**
-	 * {@inheritDoc}
-	 *
-	 * @since 2
-	 */
-	@Override
-	default float[] getValues( Component c ) {
-		return new float[] { getValue( c ) };
-	}
-
-	/**
-	 * Gets the value of the component.
+	 * Gets the animatable value of the component.
 	 * <p>
 	 * This can be any value and depends on the component.
 	 * If the value changes, then this class animates from the old value to the new one.
 	 * <p>
 	 * For a toggle button this could be {@code 0} for off and {@code 1} for on.
 	 *
-	 * @deprecated override {@link #getValues(Component)} instead
+	 * @deprecated override {@link #getAnimatableValues(Component)} instead
 	 */
 	@Deprecated
 	default float getValue( Component c ) {
 		return 0;
 	}
 
+	/**
+	 * {@inheritDoc}
+	 *
+	 * @since TODO
+	 */
+	@Override
+	default Object getAnimationClientPropertyKey() {
+		// for compatibility
+		return getClientPropertyKey();
+	}
+
+	/**
+	 * Returns the client property key used to store the animation support.
+	 *
+	 * @deprecated override {@link #getAnimationClientPropertyKey()} instead
+	 */
+	@Deprecated
+	default Object getClientPropertyKey() {
+		return getClass();
+	}
+
 	//---- class AnimationSupport ---------------------------------------------
 
 	/**
@@ -138,7 +163,7 @@ public interface AnimatedIcon
 		 */
 		@Deprecated
 		public static void paintIcon( AnimatedIcon icon, Component c, Graphics g, int x, int y ) {
-			AnimatedPainterSupport.paint( icon, c, g, x, y, icon.getIconWidth(), icon.getIconHeight() );
+			AnimatedPainterSupport.paint( icon, c, (Graphics2D) g, x, y, icon.getIconWidth(), icon.getIconHeight() );
 		}
 
 		/**

flatlaf-core/src/main/java/com/formdev/flatlaf/util/AnimatedPainter.java

@@ -25,15 +25,17 @@ import com.formdev.flatlaf.util.Animator.Interpolator;
 /**
  * Painter that automatically animates painting on component value(s) changes.
  * <p>
- * {@link #getValues(Component)} returns the value(s) of the component.
+ * {@link #getAnimatableValues(Component)} returns the animatable value(s) of the component.
  * If the value(s) have changed, then {@link #paintAnimated(Component, Graphics2D, int, int, int, int, float[])}
  * is invoked multiple times with animated value(s) (from old value(s) to new value(s)).
- * If {@link #getValues(Component)} returns multiple values, then each value gets its own independent animation.
+ * If {@link #getAnimatableValues(Component)} returns multiple values, then each value
+ * gets its own independent animation, which may start/end at different points in time,
+ * may have different duration, resolution and interpolator.
  * <p>
  * See {@link AnimatedBorder} or {@link AnimatedIcon} for examples.
  * <p>
  * Animation works only if the component passed to {@link #paintWithAnimation(Component, Graphics, int, int, int, int)}
- * is a instance of {@link JComponent}.
+ * is an instance of {@link JComponent}.
  * A client property is set on the component to store the animation state.
  *
  * @author Karl Tauber
@@ -41,10 +43,23 @@ import com.formdev.flatlaf.util.Animator.Interpolator;
  */
 public interface AnimatedPainter
 {
+	/**
+	 * Gets the animatable value(s) of the component.
+	 * <p>
+	 * This can be any value(s) and depends on the component.
+	 * If the value(s) changes, then this class animates from the old value(s) to the new ones.
+	 * If multiple values are returned, then each value gets its own independent animation.
+	 * <p>
+	 * For a toggle button this could be {@code 0} for off and {@code 1} for on.
+	 * A complex check box could return values for selected, hover, pressed and focused states.
+	 * The painter then can show independent animations for those states.
+	 */
+	float[] getAnimatableValues( Component c );
+
 	/**
 	 * Starts painting.
 	 * Either invokes {@link #paintAnimated(Component, Graphics2D, int, int, int, int, float[])}
-	 * once to paint current value(s) (see {@link #getValues(Component)}. Or if value(s) has
+	 * once to paint current value(s) (see {@link #getAnimatableValues(Component)}. Or if value(s) has
 	 * changed, compared to last painting, then it starts an animation and invokes
 	 * {@link #paintAnimated(Component, Graphics2D, int, int, int, int, float[])}
 	 * multiple times with animated value(s) (from old value(s) to new value(s)).
@@ -57,7 +72,7 @@ public interface AnimatedPainter
 	 * @param height the height of the paint area
 	 */
 	default void paintWithAnimation( Component c, Graphics g, int x, int y, int width, int height ) {
-		AnimatedPainterSupport.paint( this, c, g, x, y, width, height );
+		AnimatedPainterSupport.paint( this, c, (Graphics2D) g, x, y, width, height );
 	}
 
 	/**
@@ -71,9 +86,9 @@ public interface AnimatedPainter
 	 * @param y the y coordinate of the paint area
 	 * @param width the width of the paint area
 	 * @param height the height of the paint area
-	 * @param animatedValues the animated values, which are either equal to what {@link #getValues(Component)}
+	 * @param animatedValues the animated values, which are either equal to what {@link #getAnimatableValues(Component)}
 	 *     returned, or somewhere between the previous values and the latest values
-	 *     that {@link #getValues(Component)} returned
+	 *     that {@link #getAnimatableValues(Component)} returned
 	 */
 	void paintAnimated( Component c, Graphics2D g, int x, int y, int width, int height, float[] animatedValues );
 
@@ -91,17 +106,6 @@ public interface AnimatedPainter
 		c.repaint( x, y, width, height );
 	}
 
-	/**
-	 * Gets the value(s) of the component.
-	 * <p>
-	 * This can be any value and depends on the component.
-	 * If the value(s) changes, then this class animates from the old value(s) to the new ones.
-	 * If multiple values are returned, then each value gets its own independent animation.
-	 * <p>
-	 * For a toggle button this could be {@code 0} for off and {@code 1} for on.
-	 */
-	float[] getValues( Component c );
-
 	/**
 	 * Returns whether animation is enabled for this painter (default is {@code true}).
 	 */
@@ -161,7 +165,7 @@ public interface AnimatedPainter
 	/**
 	 * Returns the client property key used to store the animation support.
 	 */
-	default Object getClientPropertyKey() {
+	default Object getAnimationClientPropertyKey() {
 		return getClass();
 	}
 

flatlaf-core/src/main/java/com/formdev/flatlaf/util/AnimatedPainterSupport.java

@@ -17,7 +17,6 @@
 package com.formdev.flatlaf.util;
 
 import java.awt.Component;
-import java.awt.Graphics;
 import java.awt.Graphics2D;
 import javax.swing.JComponent;
 
@@ -29,7 +28,8 @@ import javax.swing.JComponent;
  */
 class AnimatedPainterSupport
 {
-	private int valueIndex;
+	private final int valueIndex;
+
 	private float startValue;
 	private float targetValue;
 	private float animatedValue;
@@ -43,22 +43,26 @@ class AnimatedPainterSupport
 	private int width;
 	private int height;
 
-	static void paint( AnimatedPainter painter, Component c, Graphics g,
+	private AnimatedPainterSupport( int valueIndex ) {
+		this.valueIndex = valueIndex;
+	}
+
+	static void paint( AnimatedPainter painter, Component c, Graphics2D g,
 		int x, int y, int width, int height )
 	{
+		// get animatable component values
+		float[] values = painter.getAnimatableValues( c );
+
 		if( !isAnimationEnabled( painter, c ) ) {
 			// paint without animation if animation is disabled or
 			// component is not a JComponent and therefore does not support
 			// client properties, which are required to keep animation state
-			painter.paintAnimated( c, (Graphics2D) g, x, y, width, height, painter.getValues( c ) );
+			painter.paintAnimated( c, g, x, y, width, height, values );
 			return;
 		}
 
-		// get component values
-		float values[] = painter.getValues( c );
-
 		JComponent jc = (JComponent) c;
-		Object key = painter.getClientPropertyKey();
+		Object key = painter.getAnimationClientPropertyKey();
 		AnimatedPainterSupport[] ass = (AnimatedPainterSupport[]) jc.getClientProperty( key );
 
 		// check whether length of values array has changed
@@ -83,8 +87,7 @@ class AnimatedPainterSupport
 
 			if( as == null ) {
 				// painted first time --> do not animate, but remember current component value
-				as = new AnimatedPainterSupport();
-				as.valueIndex = i;
+				as = new AnimatedPainterSupport( i );
 				as.startValue = as.targetValue = as.animatedValue = value;
 				ass[i] = as;
 			} else if( value != as.targetValue ) {
@@ -159,7 +162,7 @@ class AnimatedPainterSupport
 		for( int i = 0; i < ass.length; i++ )
 			animatedValues[i] = ass[i].animatedValue;
 
-		painter.paintAnimated( c, (Graphics2D) g, x, y, width, height, animatedValues );
+		painter.paintAnimated( c, g, x, y, width, height, animatedValues );
 	}
 
 	private static boolean isAnimationEnabled( AnimatedPainter painter, Component c ) {
@@ -170,7 +173,7 @@ class AnimatedPainterSupport
 		if( !isAnimationEnabled( painter, c ) )
 			return;
 
-		AnimatedPainterSupport[] ass = (AnimatedPainterSupport[]) ((JComponent)c).getClientProperty( painter.getClientPropertyKey() );
+		AnimatedPainterSupport[] ass = (AnimatedPainterSupport[]) ((JComponent)c).getClientProperty( painter.getAnimationClientPropertyKey() );
 		if( ass != null ) {
 			for( int i = 0; i < ass.length; i++ ) {
 				AnimatedPainterSupport as = ass[i];

flatlaf-testing/src/main/java/com/formdev/flatlaf/testing/FlatAnimatedBorderTest.java

@@ -244,7 +244,7 @@ public class FlatAnimatedBorderTest
 		}
 
 		@Override
-		public float[] getValues( Component c ) {
+		public float[] getAnimatableValues( Component c ) {
 			return new float[] { FlatUIUtils.isPermanentFocusOwner( c ) ? 1 : 0 };
 		}
 
@@ -315,7 +315,7 @@ public class FlatAnimatedBorderTest
 		}
 
 		@Override
-		public float[] getValues( Component c ) {
+		public float[] getAnimatableValues( Component c ) {
 			return new float[] { FlatUIUtils.isPermanentFocusOwner( c ) ? 1 : 0 };
 		}
 
@@ -416,7 +416,7 @@ public class FlatAnimatedBorderTest
 		}
 
 		@Override
-		public float[] getValues( Component c ) {
+		public float[] getAnimatableValues( Component c ) {
 			return new float[] { FlatUIUtils.isPermanentFocusOwner( c ) ? 1 : 0 };
 		}
 

flatlaf-testing/src/main/java/com/formdev/flatlaf/testing/FlatAnimatedIconTest.java

@@ -221,7 +221,7 @@ public class FlatAnimatedIconTest
 		}
 
 		@Override
-		public float[] getValues( Component c ) {
+		public float[] getAnimatableValues( Component c ) {
 			return new float[] { ((JRadioButton)c).isSelected() ? 1 : 0 };
 		}
 
@@ -266,7 +266,7 @@ public class FlatAnimatedIconTest
 		}
 
 		@Override
-		public float[] getValues( Component c ) {
+		public float[] getAnimatableValues( Component c ) {
 			return new float[] { ((AbstractButton)c).isSelected() ? 1 : 0 };
 		}
 
@@ -342,7 +342,7 @@ public class FlatAnimatedIconTest
 		}
 
 		@Override
-		public float[] getValues( Component c ) {
+		public float[] getAnimatableValues( Component c ) {
 			AbstractButton b = (AbstractButton) c;
 			ButtonModel bm = b.getModel();
 
@@ -392,7 +392,7 @@ public class FlatAnimatedIconTest
 		}
 
 		@Override
-		public float[] getValues( Component c ) {
+		public float[] getAnimatableValues( Component c ) {
 			return new float[] { ((AbstractButton)c).isSelected() ? 1 : 0 };
 		}