AnimatedPainter: support individual animation duration, resolution and interpolator depending on value(s)

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

@@ -132,6 +132,32 @@ public interface AnimatedPainter
 		return CubicBezierEasing.STANDARD_EASING;
 	}
 
+	/**
+	 * Returns the duration of the animation in milliseconds (default is 150)
+	 * for the given value index and value.
+	 */
+	default int getAnimationDuration( int valueIndex, float value ) {
+		return getAnimationDuration();
+	}
+
+	/**
+	 * Returns the resolution of the animation in milliseconds (default is 10)
+	 * for the given value index and value.
+	 * Resolution is the amount of time between timing events.
+	 */
+	default int getAnimationResolution( int valueIndex, float value ) {
+		return getAnimationResolution();
+	}
+
+	/**
+	 * Returns the interpolator for the animation
+	 * for the given value index and value.
+	 * Default is {@link CubicBezierEasing#STANDARD_EASING}.
+	 */
+	default Interpolator getAnimationInterpolator( int valueIndex, float value ) {
+		return getAnimationInterpolator();
+	}
+
 	/**
 	 * Returns the client property key used to store the animation support.
 	 */

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

@@ -29,6 +29,7 @@ import javax.swing.JComponent;
  */
 class AnimatedPainterSupport
 {
+	private int valueIndex;
 	private float startValue;
 	private float targetValue;
 	private float animatedValue;
@@ -76,8 +77,6 @@ class AnimatedPainterSupport
 			jc.putClientProperty( key, ass );
 		}
 
-		float[] animatedValues = new float[ass.length];
-
 		for( int i = 0; i < ass.length; i++ ) {
 			AnimatedPainterSupport as = ass[i];
 			float value = values[i];
@@ -85,15 +84,29 @@ class AnimatedPainterSupport
 			if( as == null ) {
 				// painted first time --> do not animate, but remember current component value
 				as = new AnimatedPainterSupport();
+				as.valueIndex = i;
 				as.startValue = as.targetValue = as.animatedValue = value;
 				ass[i] = as;
 			} else if( value != as.targetValue ) {
 				// value changed --> (re)start animation
 
+				int animationDuration = painter.getAnimationDuration( as.valueIndex, value );
+
+				// do not animate if animation duration (for current value) is zero
+				if( animationDuration <= 0 ) {
+					if( as.animator != null ) {
+						as.animator.cancel();
+						as.animator = null;
+					}
+					as.startValue = as.targetValue = as.animatedValue = value;
+					as.fraction = 0;
+					continue;
+				}
+
 				if( as.animator == null ) {
 					// create animator
 					AnimatedPainterSupport as2 = as;
-					as.animator = new Animator( painter.getAnimationDuration(), fraction -> {
+					as.animator = new Animator( 1, fraction -> {
 						// check whether component was removed while animation is running
 						if( !c.isDisplayable() ) {
 							as2.animator.stop();
@@ -116,19 +129,22 @@ class AnimatedPainterSupport
 					// if animation is still running, restart it from the current
 					// animated value to the new target value with reduced duration
 					as.animator.cancel();
-					int duration2 = (int) (painter.getAnimationDuration() * as.fraction);
+					int duration2 = (int) (animationDuration * as.fraction);
 					if( duration2 > 0 )
 						as.animator.setDuration( duration2 );
 					as.startValue = as.animatedValue;
 				} else {
 					// new animation
-					as.animator.setDuration( painter.getAnimationDuration() );
-					as.animator.setResolution( painter.getAnimationResolution() );
-					as.animator.setInterpolator( painter.getAnimationInterpolator() );
+					as.animator.setDuration( animationDuration );
 
 					as.animatedValue = as.startValue;
 				}
 
+				// update animator for new value
+				as.animator.setResolution( painter.getAnimationResolution( as.valueIndex, value ) );
+				as.animator.setInterpolator( painter.getAnimationInterpolator( as.valueIndex, value ) );
+
+				// start animation
 				as.targetValue = value;
 				as.animator.start();
 			}
@@ -137,10 +153,12 @@ class AnimatedPainterSupport
 			as.y = y;
 			as.width = width;
 			as.height = height;
-
-			animatedValues[i] = as.animatedValue;
 		}
 
+		float[] animatedValues = new float[ass.length];
+		for( int i = 0; i < ass.length; i++ )
+			animatedValues[i] = ass[i].animatedValue;
+
 		painter.paintAnimated( c, (Graphics2D) g, x, y, width, height, animatedValues );
 	}
 

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

@@ -171,7 +171,7 @@ public class FlatAnimatedBorderTest
 		add(durationLabel, "cell 0 11");
 
 		//---- durationField ----
-		durationField.setModel(new SpinnerNumberModel(200, 100, null, 50));
+		durationField.setModel(new SpinnerNumberModel(200, 0, null, 50));
 		add(durationField, "cell 0 11");
 		// JFormDesigner - End of component initialization  //GEN-END:initComponents
 	}

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

@@ -113,7 +113,7 @@ new FormModel {
 			add( new FormComponent( "javax.swing.JSpinner" ) {
 				name: "durationField"
 				"model": new javax.swing.SpinnerNumberModel {
-					minimum: 100
+					minimum: 0
 					stepSize: 50
 					value: 200
 				}

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

@@ -145,7 +145,7 @@ public class FlatAnimatedIconTest
 		add(durationLabel, "cell 0 7 3 1");
 
 		//---- durationField ----
-		durationField.setModel(new SpinnerNumberModel(200, 100, null, 50));
+		durationField.setModel(new SpinnerNumberModel(200, 0, null, 50));
 		add(durationField, "cell 0 7 3 1");
 
 		//---- buttonGroup1 ----

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

@@ -88,7 +88,7 @@ new FormModel {
 			add( new FormComponent( "javax.swing.JSpinner" ) {
 				name: "durationField"
 				"model": new javax.swing.SpinnerNumberModel {
-					minimum: 100
+					minimum: 0
 					stepSize: 50
 					value: 200
 				}