LineChartPanel:

- support "synchron" charts
- reworked to make code easier to understand/maintain
- added some JavaBean properties to make it configurable in JFormDesigner
- fixes some bugs

removed `FlatAnimatorTest.LineChartPanel` and replaced it with `LineChartPanel`

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

@@ -25,6 +25,7 @@ import java.awt.Insets;
 import java.awt.geom.Rectangle2D;
 import javax.swing.*;
 import javax.swing.border.AbstractBorder;
+import com.formdev.flatlaf.FlatClientProperties;
 import com.formdev.flatlaf.ui.FlatUIUtils;
 import com.formdev.flatlaf.util.AnimatedBorder;
 import com.formdev.flatlaf.util.ColorFunctions;
@@ -92,7 +93,7 @@ public class FlatAnimatedBorderTest
 	private void initComponents() {
 		// JFormDesigner - Component initialization - DO NOT MODIFY  //GEN-BEGIN:initComponents
 		label3 = new JLabel();
-		lineChartPanel = new FlatAnimatorTest.LineChartPanel();
+		lineChartPanel = new LineChartPanel();
 		fade1TextField = new JTextField();
 		fade1ChartColor = new FlatAnimatorTest.JChartColor();
 		fade2TextField = new JTextField();
@@ -118,7 +119,7 @@ public class FlatAnimatedBorderTest
 			// columns
 			"[fill]" +
 			"[fill]para" +
-			"[fill]",
+			"[grow,fill]",
 			// rows
 			"[]" +
 			"[]" +
@@ -136,7 +137,7 @@ public class FlatAnimatedBorderTest
 		//---- label3 ----
 		label3.setText("Fade:");
 		add(label3, "cell 0 0");
-		add(lineChartPanel, "cell 2 0 1 12");
+		add(lineChartPanel, "cell 2 0 1 12,growy");
 		add(fade1TextField, "cell 0 1");
 		add(fade1ChartColor, "cell 1 1");
 		add(fade2TextField, "cell 0 2");
@@ -151,12 +152,12 @@ public class FlatAnimatedBorderTest
 		add(material2ChartColor, "cell 1 5");
 
 		//---- material3TextField ----
-		material3TextField.putClientProperty("FlatLaf.styleClass", "large");
+		material3TextField.putClientProperty(FlatClientProperties.STYLE_CLASS, "large");
 		add(material3TextField, "cell 0 6");
 		add(material3ChartColor, "cell 1 6");
 
 		//---- material4TextField ----
-		material4TextField.putClientProperty("FlatLaf.styleClass", "large");
+		material4TextField.putClientProperty(FlatClientProperties.STYLE_CLASS, "large");
 		add(material4TextField, "cell 0 7");
 		add(material4ChartColor, "cell 1 7");
 
@@ -178,7 +179,7 @@ public class FlatAnimatedBorderTest
 
 	// JFormDesigner - Variables declaration - DO NOT MODIFY  //GEN-BEGIN:variables
 	private JLabel label3;
-	private FlatAnimatorTest.LineChartPanel lineChartPanel;
+	private LineChartPanel lineChartPanel;
 	private JTextField fade1TextField;
 	private FlatAnimatorTest.JChartColor fade1ChartColor;
 	private JTextField fade2TextField;
@@ -231,7 +232,7 @@ public class FlatAnimatedBorderTest
 
 			if( animatedValue != 0 && animatedValue != 1 ) {
 				Color chartColor = (Color) ((JComponent)c).getClientProperty( CHART_COLOR_KEY );
-				lineChartPanel.lineChart.addValue( animatedValue, chartColor );
+				lineChartPanel.addValue( chartColor, animatedValue, Integer.MIN_VALUE, "fade" );
 			}
 		}
 
@@ -295,7 +296,7 @@ public class FlatAnimatedBorderTest
 
 			if( animatedValue != 0 && animatedValue != 1 ) {
 				Color chartColor = (Color) ((JComponent)c).getClientProperty( CHART_COLOR_KEY );
-				lineChartPanel.lineChart.addValue( animatedValue, chartColor );
+				lineChartPanel.addValue( chartColor, animatedValue, Integer.MIN_VALUE, "material" );
 			}
 		}
 
@@ -410,7 +411,7 @@ public class FlatAnimatedBorderTest
 
 			if( animatedValue != 0 && animatedValue != 1 ) {
 				Color chartColor = (Color) ((JComponent)c).getClientProperty( CHART_COLOR_KEY );
-				lineChartPanel.lineChart.addValue( animatedValue, chartColor );
+				lineChartPanel.addValue( chartColor, animatedValue, Integer.MIN_VALUE, "minimal" );
 			}
 		}
 

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

@@ -1,11 +1,11 @@
-JFDML JFormDesigner: "7.0.5.0.382" Java: "16" encoding: "UTF-8"
+JFDML JFormDesigner: "8.3" encoding: "UTF-8"
 
 new FormModel {
 	contentType: "form/swing"
 	root: new FormRoot {
 		add( new FormContainer( "com.formdev.flatlaf.testing.FlatTestPanel", new FormLayoutManager( class net.miginfocom.swing.MigLayout ) {
 			"$layoutConstraints": "insets dialog,hidemode 3"
-			"$columnConstraints": "[fill][fill]para[fill]"
+			"$columnConstraints": "[fill][fill]para[grow,fill]"
 			"$rowConstraints": "[][][]para[][][][][]para[][][grow][]"
 		} ) {
 			name: "this"
@@ -15,10 +15,10 @@ new FormModel {
 			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 				"value": "cell 0 0"
 			} )
-			add( new FormComponent( "com.formdev.flatlaf.testing.FlatAnimatorTest$LineChartPanel" ) {
+			add( new FormComponent( "com.formdev.flatlaf.testing.LineChartPanel" ) {
 				name: "lineChartPanel"
 			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-				"value": "cell 2 0 1 12"
+				"value": "cell 2 0 1 12,growy"
 			} )
 			add( new FormComponent( "javax.swing.JTextField" ) {
 				name: "fade1TextField"
@@ -122,7 +122,7 @@ new FormModel {
 			} )
 		}, new FormLayoutConstraints( null ) {
 			"location": new java.awt.Point( 0, 0 )
-			"size": new java.awt.Dimension( 725, 325 )
+			"size": new java.awt.Dimension( 725, 465 )
 		} )
 	}
 }

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

@@ -39,7 +39,7 @@ public class FlatAnimatedIconTest
 	private static final Color CHART_RADIO_BUTTON_3 = Color.green;
 	private static final Color CHART_CHECK_BOX_1 = Color.magenta;
 	private static final Color CHART_CHECK_BOX_2 = Color.orange;
-	private static final Color[] CHART_SWITCH_EX = new Color[] { Color.red, Color.green, Color.blue };
+	private static final Color[] CHART_SWITCH_EX = { Color.red, Color.green, Color.blue };
 
 	private static final String CHART_COLOR_KEY = "chartColor";
 
@@ -79,7 +79,7 @@ public class FlatAnimatedIconTest
 		// JFormDesigner - Component initialization - DO NOT MODIFY  //GEN-BEGIN:initComponents
 		radioButton1 = new JRadioButton();
 		radioButton1ChartColor = new FlatAnimatorTest.JChartColor();
-		lineChartPanel = new FlatAnimatorTest.LineChartPanel();
+		lineChartPanel = new LineChartPanel();
 		radioButton2 = new JRadioButton();
 		radioButton2ChartColor = new FlatAnimatorTest.JChartColor();
 		radioButton3 = new JRadioButton();
@@ -114,7 +114,7 @@ public class FlatAnimatedIconTest
 		radioButton1.setSelected(true);
 		add(radioButton1, "cell 0 0");
 		add(radioButton1ChartColor, "cell 1 0");
-		add(lineChartPanel, "cell 2 0 1 7");
+		add(lineChartPanel, "cell 2 0 1 8,growy");
 
 		//---- radioButton2 ----
 		radioButton2.setText("radio 2");
@@ -142,11 +142,11 @@ public class FlatAnimatedIconTest
 
 		//---- durationLabel ----
 		durationLabel.setText("Duration:");
-		add(durationLabel, "cell 0 7 3 1");
+		add(durationLabel, "cell 0 7 2 1");
 
 		//---- durationField ----
 		durationField.setModel(new SpinnerNumberModel(200, 0, null, 50));
-		add(durationField, "cell 0 7 3 1");
+		add(durationField, "cell 0 7 2 1");
 
 		//---- buttonGroup1 ----
 		ButtonGroup buttonGroup1 = new ButtonGroup();
@@ -159,7 +159,7 @@ public class FlatAnimatedIconTest
 	// JFormDesigner - Variables declaration - DO NOT MODIFY  //GEN-BEGIN:variables
 	private JRadioButton radioButton1;
 	private FlatAnimatorTest.JChartColor radioButton1ChartColor;
-	private FlatAnimatorTest.LineChartPanel lineChartPanel;
+	private LineChartPanel lineChartPanel;
 	private JRadioButton radioButton2;
 	private FlatAnimatorTest.JChartColor radioButton2ChartColor;
 	private JRadioButton radioButton3;
@@ -216,7 +216,7 @@ public class FlatAnimatedIconTest
 
 			if( animatedValue != 0 && animatedValue != 1 ) {
 				Color chartColor = (Color) ((JComponent)c).getClientProperty( CHART_COLOR_KEY );
-				lineChartPanel.lineChart.addValue( animatedValue, chartColor );
+				lineChartPanel.addValue( chartColor, animatedValue, Integer.MIN_VALUE, "radio" );
 			}
 		}
 
@@ -261,7 +261,7 @@ public class FlatAnimatedIconTest
 
 			if( animatedValue != 0 && animatedValue != 1 ) {
 				Color chartColor = (Color) ((JComponent)c).getClientProperty( CHART_COLOR_KEY );
-				lineChartPanel.lineChart.addValue( animatedValue, chartColor );
+				lineChartPanel.addValue( chartColor, animatedValue, Integer.MIN_VALUE, "switch" );
 			}
 		}
 
@@ -328,7 +328,7 @@ public class FlatAnimatedIconTest
 			for( int i = 0; i < animatedValues.length; i++ ) {
 				float animatedValue = animatedValues[i];
 				if( animatedValue != 0 && animatedValue != 1 )
-					lineChartPanel.lineChart.addValue( animatedValue, CHART_SWITCH_EX[i] );
+					lineChartPanel.addValue( CHART_SWITCH_EX[i], animatedValue, Integer.MIN_VALUE, "switch ex" );
 			}
 		}
 
@@ -387,7 +387,7 @@ public class FlatAnimatedIconTest
 
 			if( animatedValue != 0 && animatedValue != 1 ) {
 				Color chartColor = (Color) ((JComponent)c).getClientProperty( CHART_COLOR_KEY );
-				lineChartPanel.lineChart.addValue( animatedValue, chartColor );
+				lineChartPanel.addValue( chartColor, animatedValue, Integer.MIN_VALUE, "minimal" );
 			}
 		}
 

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

@@ -1,4 +1,4 @@
-JFDML JFormDesigner: "7.0.5.0.382" Java: "16" encoding: "UTF-8"
+JFDML JFormDesigner: "8.3" encoding: "UTF-8"
 
 new FormModel {
 	contentType: "form/swing"
@@ -22,10 +22,10 @@ new FormModel {
 			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 				"value": "cell 1 0"
 			} )
-			add( new FormComponent( "com.formdev.flatlaf.testing.FlatAnimatorTest$LineChartPanel" ) {
+			add( new FormComponent( "com.formdev.flatlaf.testing.LineChartPanel" ) {
 				name: "lineChartPanel"
 			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-				"value": "cell 2 0 1 7"
+				"value": "cell 2 0 1 8,growy"
 			} )
 			add( new FormComponent( "javax.swing.JRadioButton" ) {
 				name: "radioButton2"
@@ -83,7 +83,7 @@ new FormModel {
 				name: "durationLabel"
 				"text": "Duration:"
 			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-				"value": "cell 0 7 3 1"
+				"value": "cell 0 7 2 1"
 			} )
 			add( new FormComponent( "javax.swing.JSpinner" ) {
 				name: "durationField"
@@ -93,7 +93,7 @@ new FormModel {
 					value: 200
 				}
 			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-				"value": "cell 0 7 3 1"
+				"value": "cell 0 7 2 1"
 			} )
 		}, new FormLayoutConstraints( null ) {
 			"location": new java.awt.Point( 0, 0 )

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

@@ -17,17 +17,9 @@
 package com.formdev.flatlaf.testing;
 
 import java.awt.*;
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
 import javax.swing.*;
-import com.formdev.flatlaf.FlatLaf;
-import com.formdev.flatlaf.ui.FlatUIUtils;
 import com.formdev.flatlaf.util.Animator;
 import com.formdev.flatlaf.util.CubicBezierEasing;
-import com.formdev.flatlaf.util.HSLColor;
-import com.formdev.flatlaf.util.HiDPIUtils;
 import com.formdev.flatlaf.util.UIScale;
 import com.formdev.flatlaf.util.Animator.Interpolator;
 import net.miginfocom.swing.*;
@@ -74,7 +66,7 @@ public class FlatAnimatorTest
 		} else {
 			animator = new Animator( 1000, fraction -> {
 				scrollBar.setValue( Math.round( fraction * scrollBar.getMaximum() ) );
-				lineChartPanel.lineChart.addValue( fraction, chartColor );
+				lineChartPanel.addValue( chartColor, fraction, Integer.MIN_VALUE, "animator" );
 			} );
 			animator.setInterpolator( interpolator );
 			animator.start();
@@ -94,7 +86,7 @@ public class FlatAnimatorTest
 		standardEasingChartColor = new FlatAnimatorTest.JChartColor();
 		standardEasingScrollBar = new JScrollBar();
 		startButton = new JButton();
-		lineChartPanel = new FlatAnimatorTest.LineChartPanel();
+		lineChartPanel = new LineChartPanel();
 
 		//======== this ========
 		setLayout(new MigLayout(
@@ -159,420 +151,9 @@ public class FlatAnimatorTest
 	private FlatAnimatorTest.JChartColor standardEasingChartColor;
 	private JScrollBar standardEasingScrollBar;
 	private JButton startButton;
-	private FlatAnimatorTest.LineChartPanel lineChartPanel;
+	private LineChartPanel lineChartPanel;
 	// JFormDesigner - End of variables declaration  //GEN-END:variables
 
-	//---- class LineChartPanel -----------------------------------------------
-
-	static class LineChartPanel
-		extends JPanel
-	{
-		LineChartPanel() {
-			initComponents();
-
-			secondsWidthSlider.setValue( lineChart.getSecondsWidth() );
-			updateChartDelayedChanged();
-		}
-
-		void setSecondsWidth( int secondsWidth ) {
-			lineChart.setSecondsWidth( secondsWidth );
-			secondsWidthSlider.setValue( secondsWidth );
-		}
-
-		private void secondsWidthChanged() {
-			lineChart.setSecondsWidth( secondsWidthSlider.getValue() );
-		}
-
-		private void updateChartDelayedChanged() {
-			lineChart.setUpdateDelayed( updateChartDelayedCheckBox.isSelected() );
-		}
-
-		private void clearChart() {
-			lineChart.clear();
-		}
-
-		private void initComponents() {
-			// JFormDesigner - Component initialization - DO NOT MODIFY  //GEN-BEGIN:initComponents
-			JScrollPane lineChartScrollPane = new JScrollPane();
-			lineChart = new FlatAnimatorTest.LineChart();
-			JLabel lineChartInfoLabel = new JLabel();
-			secondsWidthSlider = new JSlider();
-			updateChartDelayedCheckBox = new JCheckBox();
-			JButton clearChartButton = new JButton();
-
-			//======== this ========
-			setLayout(new MigLayout(
-				"ltr,insets 0,hidemode 3",
-				// columns
-				"[fill]" +
-				"[grow,fill]",
-				// rows
-				"[400,grow,fill]" +
-				"[]"));
-
-			//======== lineChartScrollPane ========
-			{
-				lineChartScrollPane.putClientProperty("JScrollPane.smoothScrolling", false);
-				lineChartScrollPane.setViewportView(lineChart);
-			}
-			add(lineChartScrollPane, "cell 0 0 2 1");
-
-			//---- lineChartInfoLabel ----
-			lineChartInfoLabel.setText("X: time (500ms per line) / Y: value (10% per line)");
-			add(lineChartInfoLabel, "cell 0 1 2 1");
-
-			//---- secondsWidthSlider ----
-			secondsWidthSlider.setMinimum(100);
-			secondsWidthSlider.setMaximum(2000);
-			secondsWidthSlider.addChangeListener(e -> secondsWidthChanged());
-			add(secondsWidthSlider, "cell 0 1 2 1");
-
-			//---- updateChartDelayedCheckBox ----
-			updateChartDelayedCheckBox.setText("Update chart delayed");
-			updateChartDelayedCheckBox.setMnemonic('U');
-			updateChartDelayedCheckBox.addActionListener(e -> updateChartDelayedChanged());
-			add(updateChartDelayedCheckBox, "cell 0 1 2 1,alignx right,growx 0");
-
-			//---- clearChartButton ----
-			clearChartButton.setText("Clear Chart");
-			clearChartButton.setMnemonic('C');
-			clearChartButton.addActionListener(e -> clearChart());
-			add(clearChartButton, "cell 0 1 2 1,alignx right,growx 0");
-			// JFormDesigner - End of component initialization  //GEN-END:initComponents
-		}
-
-		// JFormDesigner - Variables declaration - DO NOT MODIFY  //GEN-BEGIN:variables
-		FlatAnimatorTest.LineChart lineChart;
-		private JSlider secondsWidthSlider;
-		private JCheckBox updateChartDelayedCheckBox;
-		// JFormDesigner - End of variables declaration  //GEN-END:variables
-	}
-
-	//---- class LineChart ----------------------------------------------------
-
-	static class LineChart
-		extends JComponent
-		implements Scrollable
-	{
-		private static final int NEW_SEQUENCE_TIME_LAG = 500;
-		private static final int NEW_SEQUENCE_GAP = 100;
-
-		private boolean asynchron;
-		private int secondsWidth = 500;
-
-		private static class Data {
-			final double value;
-			final boolean dot;
-			final Color chartColor;
-			final long time; // in milliseconds
-
-			Data( double value, boolean dot, Color chartColor, long time ) {
-				this.value = value;
-				this.dot = dot;
-				this.chartColor = chartColor;
-				this.time = time;
-			}
-
-			@Override
-			public String toString() {
-				// for debugging
-				return String.valueOf( value );
-			}
-		}
-
-		private final List<Data> syncChartData = new ArrayList<>();
-		private final Map<Color, List<Data>> asyncColor2dataMap = new HashMap<>();
-		private final Timer repaintTime;
-		private Color lastUsedChartColor;
-		private boolean updateDelayed;
-
-		LineChart() {
-			repaintTime = new Timer( 20, e -> repaintAndRevalidate() );
-			repaintTime.setRepeats( false );
-		}
-
-		void enableAsynchron() {
-			if( !syncChartData.isEmpty() )
-				throw new IllegalStateException();
-
-			asynchron = true;
-		}
-
-		void addValue( double value, Color chartColor ) {
-			addValue( value, false, chartColor );
-		}
-
-		void addValue( double value, boolean dot, Color chartColor ) {
-			List<Data> chartData = asyncColor2dataMap.computeIfAbsent( chartColor, k -> new ArrayList<>() );
-			Data data = new Data( value, dot, chartColor, System.nanoTime() / 1000000 );
-			if( asynchron )
-				chartData.add( data );
-			else
-				syncChartData.add( data );
-
-			lastUsedChartColor = chartColor;
-
-			if( updateDelayed ) {
-				repaintTime.stop();
-				repaintTime.start();
-			} else
-				repaintAndRevalidate();
-		}
-
-		void clear() {
-			syncChartData.clear();
-			asyncColor2dataMap.clear();
-			lastUsedChartColor = null;
-
-			repaint();
-			revalidate();
-		}
-
-		void setUpdateDelayed( boolean updateDelayed ) {
-			this.updateDelayed = updateDelayed;
-		}
-
-		int getSecondsWidth() {
-			return secondsWidth;
-		}
-
-		void setSecondsWidth( int secondsWidth ) {
-			this.secondsWidth = secondsWidth;
-			repaint();
-			revalidate();
-		}
-
-		private void repaintAndRevalidate() {
-			repaint();
-			revalidate();
-
-			// scroll horizontally
-			if( lastUsedChartColor != null ) {
-				// compute chart width of last used color and start of last sequence
-				int[] lastSeqX = new int[1];
-				int cw = chartWidth( asynchron ? asyncColor2dataMap.get( lastUsedChartColor ) : syncChartData, lastSeqX );
-
-				// scroll to end of last sequence (of last used color)
-				int lastSeqWidth = cw - lastSeqX[0];
-				int width = Math.min( lastSeqWidth, getParent().getWidth() );
-				int x = cw - width;
-				scrollRectToVisible( new Rectangle( x, 0, width, getHeight() ) );
-			}
-		}
-
-		@Override
-		protected void paintComponent( Graphics g ) {
-			Graphics g2 = g.create();
-			try {
-				HiDPIUtils.paintAtScale1x( (Graphics2D) g2, this, this::paintImpl );
-			} finally {
-				g2.dispose();
-			}
-		}
-
-		private void paintImpl( Graphics2D g, int x, int y, int width, int height, double scaleFactor ) {
-			FlatUIUtils.setRenderingHints( g );
-
-			int secondsWidth = (int) (this.secondsWidth * scaleFactor);
-
-			Color lineColor = FlatUIUtils.getUIColor( "Component.borderColor", Color.lightGray );
-			Color lineColor2 = FlatLaf.isLafDark()
-				? new HSLColor( lineColor ).adjustTone( 30 )
-				: new HSLColor( lineColor ).adjustShade( 30 );
-
-			g.translate( x, y );
-
-			// fill background
-			g.setColor( UIManager.getColor( "Table.background" ) );
-			g.fillRect( x, y, width, height );
-
-			// paint horizontal lines
-			for( int i = 1; i < 10; i++ ) {
-				int hy = (height * i) / 10;
-				g.setColor( (i != 5) ? lineColor : lineColor2 );
-				g.drawLine( 0, hy, width, hy );
-			}
-
-			// paint vertical lines
-			int twoHundredMillisWidth = secondsWidth / 5;
-			for( int i = twoHundredMillisWidth; i < width; i += twoHundredMillisWidth ) {
-				g.setColor( (i % secondsWidth != 0) ? lineColor : lineColor2 );
-				g.drawLine( i, 0, i, height );
-			}
-
-			// paint lines
-			for( Map.Entry<Color, List<Data>> e : asyncColor2dataMap.entrySet() ) {
-				List<Data> chartData = asynchron ? e.getValue() : syncChartData;
-				Color chartColor = e.getKey();
-				paintChartData( g, chartData, chartColor, height, scaleFactor );
-			}
-		}
-
-		private void paintChartData( Graphics2D g, List<Data> chartData, Color chartColor, int height, double scaleFactor ) {
-			if( FlatLaf.isLafDark() )
-				chartColor = new HSLColor( chartColor ).adjustTone( 50 );
-			Color temporaryValueColor = new Color( (chartColor.getRGB() & 0xffffff) | 0x40000000, true );
-
-			int seqGapWidth = (int) (NEW_SEQUENCE_GAP * scaleFactor);
-			long seqTime = 0;
-			int seqX = 0;
-			long ptime = 0;
-			int px = 0;
-			int py = height - 1;
-			int cx = px;
-			int cy = py;
-			int pcount = 0;
-
-			g.setColor( chartColor );
-
-			boolean first = true;
-			int size = chartData.size();
-			for( int i = 0; i < size; i++ ) {
-				Data data = chartData.get( i );
-				boolean useData = (data.chartColor == chartColor);
-				int dy = height - 1 - (int) ((height - 1) * data.value);
-
-				if( data.dot ) {
-					int dotx = px;
-					if( i > 0 && data.time > ptime + NEW_SEQUENCE_TIME_LAG )
-						dotx += seqGapWidth;
-					int o = UIScale.scale( 1 );
-					int s = UIScale.scale( 3 );
-					g.fillRect( dotx - o, dy - o, s, s );
-					continue;
-				}
-
-				if( data.time > ptime + NEW_SEQUENCE_TIME_LAG ) {
-					if( !first && pcount == 0 )
-						g.drawLine( px, py, px + (int) (4 * scaleFactor), py );
-
-					// start new sequence
-					seqTime = data.time;
-					seqX = !first ? px + seqGapWidth : 0;
-					px = seqX;
-					pcount = 0;
-					first = false;
-				} else {
-					boolean isTemporaryValue = isTemporaryValue( chartData, i ) || isTemporaryValue( chartData, i - 1 );
-					if( isTemporaryValue )
-						g.setColor( temporaryValueColor );
-
-					// line in sequence
-					int dx = (int) (seqX + (((data.time - seqTime) / 1000.) * secondsWidth));
-					if( useData )
-						g.drawLine( cx, cy, dx, dy );
-					px = dx;
-					pcount++;
-
-					if( isTemporaryValue )
-						g.setColor( chartColor );
-				}
-
-				py = dy;
-				ptime = data.time;
-
-				if( useData ) {
-					cx = px;
-					cy = py;
-				}
-			}
-		}
-
-		/**
-		 * One or two values between two equal values are considered "temporary",
-		 * which means that they are the target value for the following scroll animation.
-		 */
-		private boolean isTemporaryValue( List<Data> chartData, int i ) {
-			if( i == 0 || i == chartData.size() - 1 )
-				return false;
-
-			Data dataBefore = chartData.get( i - 1 );
-			Data dataAfter = chartData.get( i + 1 );
-
-			if( dataBefore.dot || dataAfter.dot )
-				return false;
-
-			double valueBefore = dataBefore.value;
-			double valueAfter = dataAfter.value;
-
-			return valueBefore == valueAfter ||
-				(i < chartData.size() - 2 && valueBefore == chartData.get( i + 2 ).value) ||
-				(i > 1 && chartData.get( i - 2 ).value == valueAfter);
-		}
-
-		private int chartWidth() {
-			int width = 0;
-			if( asynchron ) {
-				for( List<Data> chartData : asyncColor2dataMap.values() )
-					width = Math.max( width, chartWidth( chartData, null ) );
-			} else
-				width = Math.max( width, chartWidth( syncChartData, null ) );
-			return width;
-		}
-
-		private int chartWidth( List<Data> chartData, int[] lastSeqX ) {
-			long seqTime = 0;
-			int seqX = 0;
-			long ptime = 0;
-			int px = 0;
-
-			int size = chartData.size();
-			for( int i = 0; i < size; i++ ) {
-				Data data = chartData.get( i );
-
-				if( data.time > ptime + NEW_SEQUENCE_TIME_LAG ) {
-					// start new sequence
-					seqTime = data.time;
-					seqX = (i > 0) ? px + NEW_SEQUENCE_GAP : 0;
-					px = seqX;
-				} else {
-					// line in sequence
-					int dx = (int) (seqX + (((data.time - seqTime) / 1000.) * secondsWidth));
-					px = dx;
-				}
-
-				ptime = data.time;
-			}
-
-			if( lastSeqX != null )
-				lastSeqX[0] = seqX;
-
-			return px;
-		}
-
-		@Override
-		public Dimension getPreferredSize() {
-			return new Dimension( chartWidth(), 200 );
-		}
-
-		@Override
-		public Dimension getPreferredScrollableViewportSize() {
-			return new Dimension( chartWidth(), 200 );
-		}
-
-		@Override
-		public int getScrollableUnitIncrement( Rectangle visibleRect, int orientation, int direction ) {
-			return secondsWidth;
-		}
-
-		@Override
-		public int getScrollableBlockIncrement( Rectangle visibleRect, int orientation, int direction ) {
-			JViewport viewport = (JViewport) SwingUtilities.getAncestorOfClass( JViewport.class, this );
-			return (viewport != null) ? viewport.getWidth() : 200;
-		}
-
-		@Override
-		public boolean getScrollableTracksViewportWidth() {
-			JViewport viewport = (JViewport) SwingUtilities.getAncestorOfClass( JViewport.class, this );
-			return (viewport != null) ? viewport.getWidth() > chartWidth() : true;
-		}
-
-		@Override
-		public boolean getScrollableTracksViewportHeight() {
-			return true;
-		}
-	}
-
 	//---- class JChartColor --------------------------------------------------
 
 	static class JChartColor

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

@@ -1,4 +1,4 @@
-JFDML JFormDesigner: "7.0.5.0.382" Java: "16" encoding: "UTF-8"
+JFDML JFormDesigner: "8.3" encoding: "UTF-8"
 
 new FormModel {
 	contentType: "form/swing"
@@ -103,7 +103,7 @@ new FormModel {
 			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 				"value": "cell 0 3"
 			} )
-			add( new FormComponent( "com.formdev.flatlaf.testing.FlatAnimatorTest$LineChartPanel" ) {
+			add( new FormComponent( "com.formdev.flatlaf.testing.LineChartPanel" ) {
 				name: "lineChartPanel"
 				auxiliary() {
 					"JavaCodeGenerator.variableLocal": false
@@ -115,67 +115,5 @@ new FormModel {
 			"location": new java.awt.Point( 0, 0 )
 			"size": new java.awt.Dimension( 625, 625 )
 		} )
-		add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class net.miginfocom.swing.MigLayout ) {
-			"$columnConstraints": "[fill][grow,fill]"
-			"$rowConstraints": "[400,grow,fill][]"
-			"$layoutConstraints": "ltr,insets 0,hidemode 3"
-		} ) {
-			name: "lineChartPanelNested"
-			auxiliary() {
-				"JavaCodeGenerator.className": "LineChartPanel"
-			}
-			add( new FormContainer( "javax.swing.JScrollPane", new FormLayoutManager( class javax.swing.JScrollPane ) ) {
-				name: "lineChartScrollPane"
-				"$client.JScrollPane.smoothScrolling": false
-				add( new FormComponent( "com.formdev.flatlaf.testing.FlatAnimatorTest$LineChart" ) {
-					name: "lineChart"
-					auxiliary() {
-						"JavaCodeGenerator.variableLocal": false
-						"JavaCodeGenerator.variableModifiers": 0
-					}
-				} )
-			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-				"value": "cell 0 0 2 1"
-			} )
-			add( new FormComponent( "javax.swing.JLabel" ) {
-				name: "lineChartInfoLabel"
-				"text": "X: time (500ms per line) / Y: value (10% per line)"
-			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-				"value": "cell 0 1 2 1"
-			} )
-			add( new FormComponent( "javax.swing.JSlider" ) {
-				name: "secondsWidthSlider"
-				"minimum": 100
-				"maximum": 2000
-				auxiliary() {
-					"JavaCodeGenerator.variableLocal": false
-				}
-				addEvent( new FormEvent( "javax.swing.event.ChangeListener", "stateChanged", "secondsWidthChanged", false ) )
-			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-				"value": "cell 0 1 2 1"
-			} )
-			add( new FormComponent( "javax.swing.JCheckBox" ) {
-				name: "updateChartDelayedCheckBox"
-				"text": "Update chart delayed"
-				"mnemonic": 85
-				auxiliary() {
-					"JavaCodeGenerator.variableLocal": false
-				}
-				addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "updateChartDelayedChanged", false ) )
-			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-				"value": "cell 0 1 2 1,alignx right,growx 0"
-			} )
-			add( new FormComponent( "javax.swing.JButton" ) {
-				name: "clearChartButton"
-				"text": "Clear Chart"
-				"mnemonic": 67
-				addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "clearChart", false ) )
-			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-				"value": "cell 0 1 2 1,alignx right,growx 0"
-			} )
-		}, new FormLayoutConstraints( null ) {
-			"location": new java.awt.Point( 0, 650 )
-			"size": new java.awt.Dimension( 603, 325 )
-		} )
 	}
 }

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

@@ -77,6 +77,33 @@ class LineChartPanel
 			JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT );
 	}
 
+	public boolean isYZeroAtTop() {
+		return lineChart.yZeroAtTop;
+	}
+
+	public void setYZeroAtTop( boolean yZeroAtTop ) {
+		lineChart.yZeroAtTop = yZeroAtTop;
+		lineChart.repaint();
+	}
+
+	public boolean isAsynchron() {
+		return lineChart.asynchron;
+	}
+
+	public void setAsynchron( boolean asynchron ) {
+		lineChart.asynchron = asynchron;
+		lineChart.repaint();
+	}
+
+	public boolean isTemporaryValueDetection() {
+		return lineChart.temporaryValueDetection;
+	}
+
+	public void setTemporaryValueDetection( boolean temporaryValueDetection ) {
+		lineChart.temporaryValueDetection = temporaryValueDetection;
+		lineChart.repaint();
+	}
+
 	public String getLegendYValueText() {
 		return yValueLabel.getText();
 	}
@@ -101,12 +128,21 @@ class LineChartPanel
 		legend2Label.setText( s );
 	}
 
+	public int getOneSecondWidth() {
+		return oneSecondWidthSlider.getValue();
+	}
+
+	public void setOneSecondWidth( int oneSecondWidth ) {
+		oneSecondWidthSlider.setValue( oneSecondWidth );
+	}
+
 	public boolean isUpdateChartDelayed() {
 		return updateChartDelayedCheckBox.isSelected();
 	}
 
 	public void setUpdateChartDelayed( boolean updateChartDelayed ) {
 		updateChartDelayedCheckBox.setSelected( updateChartDelayed );
+		updateChartDelayedChanged();
 	}
 
 	void addValue( Color chartColor, double value, int ivalue, String name ) {
@@ -137,8 +173,8 @@ class LineChartPanel
 			oneSecondWidth <= 8000 ? 25 :
 			10;
 
-		lineChart.setOneSecondWidth( oneSecondWidth );
+		lineChart.oneSecondWidth = oneSecondWidth;
-		lineChart.setMsPerLineX( msPerLineX );
+		lineChart.msPerLineX = msPerLineX;
 		lineChart.revalidate();
 		lineChart.repaint();
 
@@ -149,7 +185,7 @@ class LineChartPanel
 	private String xLabelText;
 
 	private void updateChartDelayedChanged() {
-		lineChart.setUpdateDelayed( updateChartDelayedCheckBox.isSelected() );
+		lineChart.updateDelayed = updateChartDelayedCheckBox.isSelected();
 	}
 
 	private void clearChart() {
@@ -227,15 +263,17 @@ class LineChartPanel
 		add(oneSecondWidthLabel, "cell 0 1,alignx right,growx 0");
 
 		//---- oneSecondWidthSlider ----
-		oneSecondWidthSlider.setMinimum(1000);
+		oneSecondWidthSlider.setMinimum(100);
 		oneSecondWidthSlider.setMaximum(10000);
+		oneSecondWidthSlider.setSnapToTicks(true);
+		oneSecondWidthSlider.setMajorTickSpacing(100);
+		oneSecondWidthSlider.setValue(500);
 		oneSecondWidthSlider.addChangeListener(e -> oneSecondWidthChanged());
-		add(oneSecondWidthSlider, "cell 0 1,alignx right,growx 0,wmax 100");
+		add(oneSecondWidthSlider, "cell 0 1,alignx right,growx 0");
 
 		//---- updateChartDelayedCheckBox ----
 		updateChartDelayedCheckBox.setText("Update chart delayed");
 		updateChartDelayedCheckBox.setMnemonic('P');
-		updateChartDelayedCheckBox.setSelected(true);
 		updateChartDelayedCheckBox.addActionListener(e -> updateChartDelayedChanged());
 		add(updateChartDelayedCheckBox, "cell 0 1,alignx right,growx 0");
 
@@ -267,27 +305,36 @@ class LineChartPanel
 		implements Scrollable
 	{
 		private static final int UPDATE_DELAY_MS = 20;
-
+		private static final int NEW_SEQUENCE_TIME_LAG_MS = 500;
-		private static final int NEW_SEQUENCE_TIME_LAG = 500;
+		private static final int NEW_SEQUENCE_GAP_MS = 100;
-		private static final int NEW_SEQUENCE_GAP = 100;
 		private static final int HIT_OFFSET = 4;
 
-		private int oneSecondWidth = 1000;
+		private static final boolean TEST = false;
-		private int msPerLineX = 200;
+
+		// asynchron means that chart for each color starts at x=0
+		private boolean asynchron;
+		private boolean temporaryValueDetection;
+		private boolean yZeroAtTop;
+		private int oneSecondWidth = 500;
+		private int msPerLineX = 100;
 		private final HashMap<String, String> methodHighlightMap = new HashMap<>();
 
 		private static class Data {
 			final double value;
 			final int ivalue;
+			final Color chartColor;
 			final Color dotColor;
 			final boolean dotOnly;
 			final long time; // in milliseconds
 			final String name;
 			final Exception stack;
 
-			Data( double value, int ivalue, Color dotColor, boolean dotOnly, long time, String name, Exception stack ) {
+			Data( double value, int ivalue, Color chartColor, Color dotColor,
+				boolean dotOnly, long time, String name, Exception stack )
+			{
 				this.value = value;
 				this.ivalue = ivalue;
+				this.chartColor = chartColor;
 				this.dotColor = dotColor;
 				this.dotOnly = dotOnly;
 				this.time = time;
@@ -303,7 +350,8 @@ class LineChartPanel
 			}
 		}
 
-		private final Map<Color, List<Data>> color2dataMap = new HashMap<>();
+		private final List<Data> syncChartData = new ArrayList<>();
+		private final Map<Color, List<Data>> asyncColor2dataMap = new HashMap<>();
 		private final Timer repaintTime;
 		private Color lastUsedChartColor;
 		private boolean updateDelayed;
@@ -318,11 +366,21 @@ class LineChartPanel
 			repaintTime.setRepeats( false );
 
 			ToolTipManager.sharedInstance().registerComponent( this );
+
+			if( TEST )
+				initTestData();
 		}
 
 		void addValue( Color chartColor, double value, int ivalue, Color dotColor, boolean dotOnly, String name ) {
-			List<Data> chartData = color2dataMap.computeIfAbsent( chartColor, k -> new ArrayList<>() );
+			if( TEST )
-			chartData.add( new Data( value, ivalue, dotColor, dotOnly, System.nanoTime() / 1000000, name, new Exception() ) );
+				return;
+
+			List<Data> chartData = asyncColor2dataMap.computeIfAbsent( chartColor, k -> new ArrayList<>() );
+			Data data = new Data( value, ivalue, chartColor, dotColor, dotOnly, System.nanoTime() / 1_000_000, name, new Exception() );
+			if( asynchron )
+				chartData.add( data );
+			else
+				syncChartData.add( data );
 
 			lastUsedChartColor = chartColor;
 
@@ -334,25 +392,19 @@ class LineChartPanel
 		}
 
 		void clear() {
-			color2dataMap.clear();
+			if( TEST ) {
+				repaint();
+				return;
+			}
+
+			syncChartData.clear();
+			asyncColor2dataMap.clear();
 			lastUsedChartColor = null;
 
 			repaint();
 			revalidate();
 		}
 
-		void setUpdateDelayed( boolean updateDelayed ) {
-			this.updateDelayed = updateDelayed;
-		}
-
-		void setOneSecondWidth( int oneSecondWidth ) {
-			this.oneSecondWidth = oneSecondWidth;
-		}
-
-		void setMsPerLineX( int msPerLineX ) {
-			this.msPerLineX = msPerLineX;
-		}
-
 		private void repaintAndRevalidate() {
 			repaint();
 			revalidate();
@@ -361,7 +413,7 @@ class LineChartPanel
 			if( lastUsedChartColor != null ) {
 				// compute chart width of last used color and start of last sequence
 				int[] lastSeqX = new int[1];
-				int cw = chartWidth( color2dataMap.get( lastUsedChartColor ), lastSeqX );
+				int cw = chartWidth( asynchron ? asyncColor2dataMap.get( lastUsedChartColor ) : syncChartData, lastSeqX );
 
 				// scroll to end of last sequence (of last used color)
 				int lastSeqWidth = cw - lastSeqX[0];
@@ -375,17 +427,17 @@ class LineChartPanel
 		protected void paintComponent( Graphics g ) {
 			Graphics g2 = g.create();
 			try {
-				HiDPIUtils.paintAtScale1x( (Graphics2D) g2, this, this::paintImpl );
+				HiDPIUtils.paintAtScale1x( (Graphics2D) g2, this, this::paintAt1x );
 			} finally {
 				g2.dispose();
 			}
 		}
 
-		private void paintImpl( Graphics2D g, int x, int y, int width, int height, double scaleFactor ) {
+		private void paintAt1x( Graphics2D g, int x, int y, int width, int height, double scaleFactor ) {
 			FlatUIUtils.setRenderingHints( g );
 
 			int oneSecondWidth = (int) (UIScale.scale( this.oneSecondWidth ) * scaleFactor);
-			int seqGapWidth = (int) (NEW_SEQUENCE_GAP * scaleFactor);
+			int seqGapWidth = (oneSecondWidth * NEW_SEQUENCE_GAP_MS) / 1000;
 			int hitOffset = (int) Math.round( UIScale.scale( HIT_OFFSET ) * scaleFactor );
 
 			Color lineColor = FlatUIUtils.getUIColor( "Component.borderColor", Color.lightGray );
@@ -418,8 +470,8 @@ class LineChartPanel
 			lastSystemScaleFactor = scaleFactor;
 
 			// paint lines
-			for( Map.Entry<Color, List<Data>> e : color2dataMap.entrySet() ) {
+			for( Map.Entry<Color, List<Data>> e : asyncColor2dataMap.entrySet() ) {
-				List<Data> chartData = e.getValue();
+				List<Data> chartData = asynchron ? e.getValue() : syncChartData;
 				Color chartColor = e.getKey();
 				if( FlatLaf.isLafDark() )
 					chartColor = new HSLColor( chartColor ).adjustTone( 50 );
@@ -427,77 +479,91 @@ class LineChartPanel
 				Color dataPointColor = fade( chartColor, FlatLaf.isLafDark() ? 0.6f : 0.2f );
 
 				// sequence start time and x coordinate
-				long seqTime = 0;
+				long seqStartTime = 0;
-				int seqX = 0;
+				int seqStartX = 0;
 
-				// "previous" data point time, x/y coordinates and count
+				// "previous" data point time and x coordinate (used for "new sequence" detection)
-				long ptime = 0;
+				long ptime = Long.MIN_VALUE;
 				int px = 0;
-				int py = 0;
-				int pcount = 0;
 
-				boolean first = true;
+				// "line" data point x/y coordinates
+				int lx = -1;
+				int ly = -1;
+
 				boolean isTemporaryValue = false;
 				int lastTemporaryValueIndex = -1;
 
 				int size = chartData.size();
 				for( int i = 0; i < size; i++ ) {
 					Data data = chartData.get( i );
+					boolean useData = (data.chartColor == chartColor);
 
-					boolean newSeq = (data.time > ptime + NEW_SEQUENCE_TIME_LAG);
+					// start new sequence if there is a larger time gap to previous data point
+					boolean newSeq = (data.time > ptime + NEW_SEQUENCE_TIME_LAG_MS);
 					ptime = data.time;
 
 					if( newSeq ) {
-						// paint short horizontal line for previous sequence that has only one data point
-						if( !first && pcount == 0 ) {
-							g.setColor( chartColor );
-							g.drawLine( px, py, px + (int) Math.round( UIScale.scale( 8 ) * scaleFactor ), py );
-						}
-
 						// start new sequence
-						seqTime = data.time;
+						seqStartTime = data.time;
-						seqX = !first ? px + seqGapWidth : 0;
+						seqStartX = (i > 0) ? px + seqGapWidth : 0;
-						px = seqX;
+						px = seqStartX;
-						pcount = 0;
+						lx = -1;
-						first = false;
+						ly = -1;
 						isTemporaryValue = false;
 					}
 
 					// x/y coordinates of current data point
+					int dx = (int) (seqStartX + (((data.time - seqStartTime) / 1000.) * oneSecondWidth));
 					int dy = (int) ((height - 1) * data.value);
-					int dx = (int) (seqX + (((data.time - seqTime) / 1000.) * oneSecondWidth));
+					if( !yZeroAtTop )
+						dy = height - 1 - dy;
 
-					// paint rectangle to indicate data point
+					// remember x coordinate for "new sequence" detection
-					g.setColor( dataPointColor );
+					px = dx;
-					g.drawRect( dx - hitOffset, dy - hitOffset, hitOffset * 2, hitOffset * 2 );
+
+					if( !useData )
+						continue;
 
 					// remember data point for tooltip
 					lastPoints.add( new Point( dx, dy ) );
 					lastDatas.add( data );
 
+					// paint rectangle to indicate data point
+					g.setColor( dataPointColor );
+					g.drawRect( dx - hitOffset, dy - hitOffset, hitOffset * 2, hitOffset * 2 );
+
+					// paint dot
 					if( data.dotColor != null ) {
 						int s1 = (int) Math.round( UIScale.scale( 1 ) * scaleFactor );
 						int s3 = (int) Math.round( UIScale.scale( 3 ) * scaleFactor );
 						g.setColor( data.dotColor );
 						g.fillRect( dx - s1, dy - s1, s3, s3 );
+
 						if( data.dotOnly )
 							continue;
 					}
 
-					if( !newSeq ) {
+					// start of line?
+					if( lx < 0 ) {
+						// remember x/y coordinates for first line
+						lx = dx;
+						ly = dy;
+						continue;
+					}
+
 					if( isTemporaryValue && i > lastTemporaryValueIndex )
 						isTemporaryValue = false;
 
+					// draw line in sequence
 					g.setColor( isTemporaryValue ? temporaryValueColor : chartColor );
+					g.drawLine( lx, ly, dx, dy );
 
-						// line in sequence
+					// remember x/y coordinates for next line
-						g.drawLine( px, py, dx, dy );
+					lx = dx;
-
+					ly = dy;
-						px = dx;
-						pcount++;
 
 					// check next data points for "temporary" value(s)
-						if( !isTemporaryValue ) {
+					if( temporaryValueDetection && !isTemporaryValue ) {
 						// one or two values between two equal values are considered "temporary",
 						// which means that they are the target value for the following scroll animation
 						int stage = 0;
@@ -518,16 +584,16 @@ class LineChartPanel
 						}
 					}
 				}
-
-					py = dy;
-				}
 			}
 		}
 
 		private int chartWidth() {
 			int width = 0;
-			for( List<Data> chartData : color2dataMap.values() )
+			if( asynchron ) {
+				for( List<Data> chartData : asyncColor2dataMap.values() )
 					width = Math.max( width, chartWidth( chartData, null ) );
+			} else
+				width = Math.max( width, chartWidth( syncChartData, null ) );
 			return width;
 		}
 
@@ -536,19 +602,21 @@ class LineChartPanel
 			int seqX = 0;
 			long ptime = 0;
 			int px = 0;
+			int oneSecondWidth = UIScale.scale( this.oneSecondWidth );
+			int seqGapWidth = (oneSecondWidth * NEW_SEQUENCE_GAP_MS) / 1000;
 
 			int size = chartData.size();
 			for( int i = 0; i < size; i++ ) {
 				Data data = chartData.get( i );
 
-				if( data.time > ptime + NEW_SEQUENCE_TIME_LAG ) {
+				if( data.time > ptime + NEW_SEQUENCE_TIME_LAG_MS ) {
 					// start new sequence
 					seqTime = data.time;
-					seqX = (i > 0) ? px + NEW_SEQUENCE_GAP : 0;
+					seqX = (i > 0) ? px + seqGapWidth : 0;
 					px = seqX;
 				} else {
 					// line in sequence
-					int dx = (int) (seqX + (((data.time - seqTime) / 1000.) * UIScale.scale( oneSecondWidth )));
+					int dx = (int) (seqX + (((data.time - seqTime) / 1000.) * oneSecondWidth ));
 					px = dx;
 				}
 
@@ -618,7 +686,11 @@ class LineChartPanel
 				buf.append( "<h2>" );
 				if( data.dotOnly )
 					buf.append( "DOT: " );
-				buf.append( data.name ).append( ' ' ).append( data.ivalue ).append( "</h2>" );
+				buf.append( data.name );
+				if( data.ivalue != Integer.MIN_VALUE )
+					buf.append( ' ' ).append( data.ivalue );
+				buf.append( " (" ).append( String.format( "%.3f", data.value ) ).append( ')' );
+				buf.append( "</h2>" );
 
 				StackTraceElement[] stackTrace = data.stack.getStackTrace();
 				for( int j = 0; j < stackTrace.length; j++ ) {
@@ -678,6 +750,7 @@ class LineChartPanel
 						classAndMethod.equals( "java.awt.Component.processMouseWheelEvent" ) ||
 						classAndMethod.equals( "java.awt.Component.processMouseMotionEvent" ) ||
 						classAndMethod.equals( "javax.swing.JComponent.processKeyBinding" ) ||
+						classAndMethod.equals( "javax.swing.JComponent.paintComponent" ) ||
 						classAndMethod.equals( "com.formdev.flatlaf.util.Animator.timingEvent" ) )
 					  break;
 				}
@@ -704,6 +777,103 @@ class LineChartPanel
 			return buf.toString();
 		}
 
+		private void initTestData() {
+//			asynchron = true;
+
+			addTestSimpleLine( Color.red, 0.0, "red" );
+			addTestSimpleLine( Color.green, 0.1, "green" );
+			addTestSimpleLine( Color.blue, 0.2, "blue" );
+			addTestSimpleLine( Color.magenta, 0.3, "magenta" );
+
+			addTestMiddleDotOnly( Color.red, 0.0, "red" );
+			addTestMiddleDotOnly( Color.green, 0.1, "green" );
+			addTestMiddleDotOnly( Color.blue, 0.2, "blue" );
+			addTestMiddleDotOnly( Color.magenta, 0.3, "magenta" );
+
+			addTestLeadingDotOnly( Color.red, 0.0, "red" );
+			addTestLeadingDotOnly( Color.green, 0.1, "green" );
+			addTestLeadingDotOnly( Color.blue, 0.2, "blue" );
+			addTestLeadingDotOnly( Color.magenta, 0.3, "magenta" );
+
+			addTestTrailingDotOnly( Color.red, 0.0, "red" );
+			addTestTrailingDotOnly( Color.green, 0.1, "green" );
+			addTestTrailingDotOnly( Color.blue, 0.2, "blue" );
+			addTestTrailingDotOnly( Color.magenta, 0.3, "magenta" );
+
+			addTestSingleData( Color.red, 0.0, "red" );
+			addTestSingleData( Color.green, 0.1, "green" );
+			addTestSingleData( Color.blue, 0.2, "blue" );
+			addTestSingleData( Color.magenta, 0.3, "magenta" );
+
+			temporaryValueDetection = true;
+			addTestWithTemporaryValues( Color.red, 0.0, "red" );
+			addTestWithTemporaryValues( Color.green, 0.1, "green" );
+			addTestWithTemporaryValues( Color.blue, 0.2, "blue" );
+			addTestWithTemporaryValues( Color.magenta, 0.3, "magenta" );
+		}
+
+		private void addTestSimpleLine( Color chartColor, double baseValue, String name ) {
+			addTestValue(  0, chartColor, baseValue + 0.0, null, false, name );
+			addTestValue( 50, chartColor, baseValue + 0.1, null, false, name );
+			addTestValue( 50, chartColor, baseValue + 0.4, null, false, name );
+			testTime += 1000;
+		}
+
+		private void addTestMiddleDotOnly( Color chartColor, double baseValue, String name ) {
+			addTestValue(  0, chartColor, baseValue + 0.0, null, false, name );
+			addTestValue( 20, chartColor, baseValue + 0.3, chartColor, true, name );
+			addTestValue( 30, chartColor, baseValue + 0.1, null, false, name );
+			addTestValue( 20, chartColor, baseValue + 0.05, chartColor, true, name );
+			addTestValue( 30, chartColor, baseValue + 0.4, null, false, name );
+			testTime += 1000;
+		}
+
+		private void addTestLeadingDotOnly( Color chartColor, double baseValue, String name ) {
+			addTestValue(  0, chartColor, baseValue + 0.05, chartColor, true, name );
+			addTestValue( 20, chartColor, baseValue + 0.0, null, false, name );
+			addTestValue( 50, chartColor, baseValue + 0.1, null, false, name );
+			addTestValue( 30, chartColor, baseValue + 0.4, null, false, name );
+			testTime += 1000;
+		}
+
+		private void addTestTrailingDotOnly( Color chartColor, double baseValue, String name ) {
+			addTestValue(  0, chartColor, baseValue + 0.0, null, false, name );
+			addTestValue( 50, chartColor, baseValue + 0.1, null, false, name );
+			addTestValue( 30, chartColor, baseValue + 0.4, null, false, name );
+			addTestValue( 20, chartColor, baseValue + 0.05, chartColor, true, name );
+			testTime += 1000;
+		}
+
+		private void addTestSingleData( Color chartColor, double baseValue, String name ) {
+			addTestValue(  0, chartColor, baseValue + 0.15, chartColor, false, name );
+			testTime += 1000;
+		}
+
+		private void addTestWithTemporaryValues( Color chartColor, double baseValue, String name ) {
+			addTestValue(  0, chartColor, baseValue + 0.0, null, false, name );
+			addTestValue( 50, chartColor, baseValue + 0.1, null, false, name );
+			addTestValue( 5, chartColor, baseValue + 0.4, null, false, name );
+			addTestValue( 5, chartColor, baseValue + 0.1, null, false, name );
+			addTestValue( 40, chartColor, baseValue + 0.3, null, false, name );
+			testTime += 1000;
+		}
+
+		private void addTestValue( int timeDelta, Color chartColor, double value, Color dotColor, boolean dotOnly, String name ) {
+			testTime += timeDelta;
+
+			List<Data> chartData = asyncColor2dataMap.computeIfAbsent( chartColor, k -> new ArrayList<>() );
+			Data data = new Data( value, testIValue++, chartColor, dotColor, dotOnly, testTime, name, new Exception() );
+			if( asynchron )
+				chartData.add( data );
+			else
+				syncChartData.add( data );
+
+			lastUsedChartColor = chartColor;
+		}
+
+		private int testIValue;
+		private long testTime;
+
 		//TODO remove and use ColorFunctions.fade() when merging to main
 		private static Color fade( Color color, float amount ) {
 			int newAlpha = Math.round( 255 * amount );

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

@@ -1,4 +1,4 @@
-JFDML JFormDesigner: "8.1.0.0.283" Java: "19.0.2" encoding: "UTF-8"
+JFDML JFormDesigner: "8.3" encoding: "UTF-8"
 
 new FormModel {
 	contentType: "form/swing"
@@ -90,17 +90,19 @@ new FormModel {
 			} )
 			add( new FormComponent( "javax.swing.JSlider" ) {
 				name: "oneSecondWidthSlider"
-				"minimum": 1000
+				"minimum": 100
 				"maximum": 10000
+				"snapToTicks": true
+				"majorTickSpacing": 100
+				"value": 500
 				addEvent( new FormEvent( "javax.swing.event.ChangeListener", "stateChanged", "oneSecondWidthChanged", false ) )
 			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-				"value": "cell 0 1,alignx right,growx 0,wmax 100"
+				"value": "cell 0 1,alignx right,growx 0"
 			} )
 			add( new FormComponent( "javax.swing.JCheckBox" ) {
 				name: "updateChartDelayedCheckBox"
 				"text": "Update chart delayed"
 				"mnemonic": 80
-				"selected": true
 				addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "updateChartDelayedChanged", false ) )
 			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 				"value": "cell 0 1,alignx right,growx 0"