use MigLayout for FlatComponentsTest because this scales gaps in Java 8

flatlaf-core/build.gradle.kts

@@ -20,6 +20,14 @@ plugins {
 	`java-library`
 }
 
+repositories {
+	jcenter()
+}
+
+dependencies {
+	testCompile( "com.miglayout:miglayout-swing:5.2" )
+}
+
 java {
     sourceCompatibility = JavaVersion.VERSION_1_8
     targetCompatibility = JavaVersion.VERSION_1_8

flatlaf-core/src/test/java/com/formdev/flatlaf/FlatComponentsTest.java

@@ -16,8 +16,8 @@
 
 package com.formdev.flatlaf;
 
-import java.awt.*;
 import javax.swing.*;
+import net.miginfocom.swing.*;
 
 /**
  * @author Karl Tauber
@@ -58,75 +58,64 @@ public class FlatComponentsTest
 		FlatComponentsTest.TestDefaultButton button5 = new FlatComponentsTest.TestDefaultButton();
 
 		//======== this ========
-		setLayout(new GridBagLayout());
+		setLayout(new MigLayout(
-		((GridBagLayout)getLayout()).columnWidths = new int[] {0, 0, 0, 0, 0, 0, 0};
+			"insets 0,hidemode 3,gap 5 5",
-		((GridBagLayout)getLayout()).rowHeights = new int[] {0, 0, 0};
+			// columns
-		((GridBagLayout)getLayout()).columnWeights = new double[] {0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 1.0E-4};
+			"[]" +
-		((GridBagLayout)getLayout()).rowWeights = new double[] {0.0, 0.0, 1.0E-4};
+			"[]" +
+			"[]" +
+			"[]" +
+			"[]" +
+			"[]",
+			// rows
+			"[]" +
+			"[]"));
 
 		//---- labelLabel ----
 		labelLabel.setText("JLabel:");
-		add(labelLabel, new GridBagConstraints(0, 0, 1, 1, 0.0, 0.0,
+		add(labelLabel, "cell 0 0");
-			GridBagConstraints.CENTER, GridBagConstraints.BOTH,
-			new Insets(0, 0, 5, 5), 0, 0));
 
 		//---- label1 ----
 		label1.setText("enabled");
 		label1.setDisplayedMnemonic('E');
-		add(label1, new GridBagConstraints(1, 0, 1, 1, 0.0, 0.0,
+		add(label1, "cell 1 0");
-			GridBagConstraints.CENTER, GridBagConstraints.BOTH,
-			new Insets(0, 0, 5, 5), 0, 0));
 
 		//---- label2 ----
 		label2.setText("disabled");
 		label2.setDisplayedMnemonic('D');
 		label2.setEnabled(false);
-		add(label2, new GridBagConstraints(2, 0, 1, 1, 0.0, 0.0,
+		add(label2, "cell 2 0");
-			GridBagConstraints.CENTER, GridBagConstraints.BOTH,
-			new Insets(0, 0, 5, 5), 0, 0));
 
 		//---- buttonLabel ----
 		buttonLabel.setText("JButton:");
-		add(buttonLabel, new GridBagConstraints(0, 1, 1, 1, 0.0, 0.0,
+		add(buttonLabel, "cell 0 1");
-			GridBagConstraints.CENTER, GridBagConstraints.BOTH,
-			new Insets(0, 0, 0, 5), 0, 0));
 
 		//---- button1 ----
 		button1.setText("enabled");
 		button1.setDisplayedMnemonicIndex(0);
-		add(button1, new GridBagConstraints(1, 1, 1, 1, 0.0, 0.0,
+		add(button1, "cell 1 1");
-			GridBagConstraints.CENTER, GridBagConstraints.BOTH,
-			new Insets(0, 0, 0, 5), 0, 0));
 
 		//---- button2 ----
 		button2.setText("disabled");
 		button2.setDisplayedMnemonicIndex(0);
 		button2.setEnabled(false);
-		add(button2, new GridBagConstraints(2, 1, 1, 1, 0.0, 0.0,
+		add(button2, "cell 2 1");
-			GridBagConstraints.CENTER, GridBagConstraints.BOTH,
-			new Insets(0, 0, 0, 5), 0, 0));
 
 		//---- button3 ----
 		button3.setText("selected");
 		button3.setSelected(true);
-		add(button3, new GridBagConstraints(3, 1, 1, 1, 0.0, 0.0,
+		add(button3, "cell 3 1");
-			GridBagConstraints.CENTER, GridBagConstraints.BOTH,
-			new Insets(0, 0, 0, 5), 0, 0));
 
 		//---- button4 ----
 		button4.setText("selected disabled");
 		button4.setSelected(true);
 		button4.setEnabled(false);
-		add(button4, new GridBagConstraints(4, 1, 1, 1, 0.0, 0.0,
+		add(button4, "cell 4 1");
-			GridBagConstraints.CENTER, GridBagConstraints.BOTH,
-			new Insets(0, 0, 0, 5), 0, 0));
 
 		//---- button5 ----
 		button5.setText("default");
 		button5.setDisplayedMnemonicIndex(0);
-		add(button5, new GridBagConstraints(5, 1, 1, 1, 0.0, 0.0,
+		add(button5, "cell 5 1");
-			GridBagConstraints.CENTER, GridBagConstraints.BOTH,
-			new Insets(0, 0, 0, 0), 0, 0));
 		// JFormDesigner - End of component initialization  //GEN-END:initComponents
 	}
 

flatlaf-core/src/test/java/com/formdev/flatlaf/FlatComponentsTest.jfd

@@ -6,81 +6,75 @@ new FormModel {
 		auxiliary() {
 			"JavaCodeGenerator.defaultVariableLocal": true
 		}
-		add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class java.awt.GridBagLayout ) {
+		add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class net.miginfocom.swing.MigLayout ) {
-			"$columnSpecs": "0, 0, 0, 0, 0, 0"
+			"$layoutConstraints": "insets 0,hidemode 3,gap 5 5"
-			"$rowSpecs": "0, 0"
+			"$columnConstraints": "[][][][][][]"
-			"$hGap": 5
+			"$rowConstraints": "[][]"
-			"$vGap": 5
-			"$alignLeft": true
-			"$alignTop": true
 		} ) {
 			name: "this"
 			add( new FormComponent( "javax.swing.JLabel" ) {
 				name: "labelLabel"
 				"text": "JLabel:"
-			}, new FormLayoutConstraints( class com.jformdesigner.runtime.GridBagConstraintsEx ) )
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 0 0"
+			} )
 			add( new FormComponent( "javax.swing.JLabel" ) {
 				name: "label1"
 				"text": "enabled"
 				"displayedMnemonic": 69
-			}, new FormLayoutConstraints( class com.jformdesigner.runtime.GridBagConstraintsEx ) {
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-				"gridx": 1
+				"value": "cell 1 0"
 			} )
 			add( new FormComponent( "javax.swing.JLabel" ) {
 				name: "label2"
 				"text": "disabled"
 				"displayedMnemonic": 68
 				"enabled": false
-			}, new FormLayoutConstraints( class com.jformdesigner.runtime.GridBagConstraintsEx ) {
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-				"gridx": 2
+				"value": "cell 2 0"
 			} )
 			add( new FormComponent( "javax.swing.JLabel" ) {
 				name: "buttonLabel"
 				"text": "JButton:"
-			}, new FormLayoutConstraints( class com.jformdesigner.runtime.GridBagConstraintsEx ) {
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-				"gridy": 1
+				"value": "cell 0 1"
 			} )
 			add( new FormComponent( "javax.swing.JButton" ) {
 				name: "button1"
 				"text": "enabled"
 				"displayedMnemonicIndex": 0
-			}, new FormLayoutConstraints( class com.jformdesigner.runtime.GridBagConstraintsEx ) {
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-				"gridx": 1
+				"value": "cell 1 1"
-				"gridy": 1
 			} )
 			add( new FormComponent( "javax.swing.JButton" ) {
 				name: "button2"
 				"text": "disabled"
 				"displayedMnemonicIndex": 0
 				"enabled": false
-			}, new FormLayoutConstraints( class com.jformdesigner.runtime.GridBagConstraintsEx ) {
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-				"gridx": 2
+				"value": "cell 2 1"
-				"gridy": 1
 			} )
 			add( new FormComponent( "javax.swing.JButton" ) {
 				name: "button3"
 				"text": "selected"
 				"selected": true
-			}, new FormLayoutConstraints( class com.jformdesigner.runtime.GridBagConstraintsEx ) {
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-				"gridx": 3
+				"value": "cell 3 1"
-				"gridy": 1
 			} )
 			add( new FormComponent( "javax.swing.JButton" ) {
 				name: "button4"
 				"text": "selected disabled"
 				"selected": true
 				"enabled": false
-			}, new FormLayoutConstraints( class com.jformdesigner.runtime.GridBagConstraintsEx ) {
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-				"gridx": 4
+				"value": "cell 4 1"
-				"gridy": 1
 			} )
 			add( new FormComponent( "com.formdev.flatlaf.FlatComponentsTest$TestDefaultButton" ) {
 				name: "button5"
 				"text": "default"
 				"displayedMnemonicIndex": 0
-			}, new FormLayoutConstraints( class com.jformdesigner.runtime.GridBagConstraintsEx ) {
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-				"gridx": 5
+				"value": "cell 5 1"
-				"gridy": 1
 			} )
 		}, new FormLayoutConstraints( null ) {
 			"location": new java.awt.Point( 0, 0 )