TextComponent: scale caret width on HiDPI screens when running on Java 8

CHANGELOG.md

@@ -3,6 +3,7 @@ FlatLaf Change Log
 
 ## Unreleased
 
+- TextComponent: Scale caret width on HiDPI screens when running on Java 8.
 - ProgressBar: If progress text is visible:
   - use smaller font
   - reduced height

flatlaf-core/src/main/java/com/formdev/flatlaf/UIDefaultsLoader.java

@@ -31,6 +31,7 @@ import java.util.Properties;
 import java.util.ServiceLoader;
 import java.util.function.Function;
 import javax.swing.UIDefaults;
+import javax.swing.UIDefaults.ActiveValue;
 import javax.swing.UIDefaults.LazyValue;
 import javax.swing.plaf.ColorUIResource;
 import javax.swing.plaf.DimensionUIResource;
@@ -39,9 +40,9 @@ import com.formdev.flatlaf.ui.FlatEmptyBorder;
 import com.formdev.flatlaf.ui.FlatLineBorder;
 import com.formdev.flatlaf.util.ColorFunctions;
 import com.formdev.flatlaf.util.DerivedColor;
-import com.formdev.flatlaf.util.ScaledNumber;
 import com.formdev.flatlaf.util.StringUtils;
 import com.formdev.flatlaf.util.SystemInfo;
+import com.formdev.flatlaf.util.UIScale;
 
 /**
  * Load UI defaults from properties files associated to Flat LaF classes and add to UI defaults.
@@ -202,7 +203,7 @@ class UIDefaultsLoader
 		return resolveValue( properties, newValue );
 	}
 
-	private enum ValueType { UNKNOWN, STRING, INTEGER, BORDER, ICON, INSETS, SIZE, COLOR, SCALEDNUMBER, INSTANCE, CLASS }
+	private enum ValueType { UNKNOWN, STRING, INTEGER, BORDER, ICON, INSETS, SIZE, COLOR, SCALEDINTEGER, INSTANCE, CLASS }
 
 	static Object parseValue( String key, String value ) {
 		return parseValue( key, value, v -> v, Collections.emptyList() );
@@ -266,7 +267,7 @@ class UIDefaultsLoader
 			case INSETS:		return parseInsets( value );
 			case SIZE:			return parseSize( value );
 			case COLOR:			return parseColorOrFunction( value, true );
-			case SCALEDNUMBER:	return parseScaledNumber( value );
+			case SCALEDINTEGER:	return parseScaledInteger( value );
 			case INSTANCE:		return parseInstance( value, addonClassLoaders );
 			case CLASS:			return parseClass( value, addonClassLoaders );
 			case UNKNOWN:
@@ -506,11 +507,10 @@ class UIDefaultsLoader
 		return null;
 	}
 
-	private static ScaledNumber parseScaledNumber( String value ) {
-		try {
-			return new ScaledNumber( Integer.parseInt( value ) );
-		} catch( NumberFormatException ex ) {
-			throw new NumberFormatException( "invalid integer '" + value + "'" );
-		}
+	private static ActiveValue parseScaledInteger( String value ) {
+		int val = parseInteger( value, true );
+		return (ActiveValue) t -> {
+			return UIScale.scale( val );
+		};
 	}
 }

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

@@ -1,77 +0,0 @@
-/*
- * Copyright 2019 FormDev Software GmbH
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.formdev.flatlaf.util;
-
-import static com.formdev.flatlaf.util.UIScale.scale;
-
-/**
- * A number that scales its value.
- *
- * NOTE:
- * Using ScaledNumber in UI defaults works only if the value is get with
- * sun.swing.DefaultLookup.getInt(), which is used by some basic UI delegates,
- * because this method uses "instanceof Number".
- * UIManager.getInt() on the other hand uses "instanceof Integer" and does not work.
- *
- * @author Karl Tauber
- */
-public class ScaledNumber
-	extends Number
-{
-	private final int value;
-
-	public ScaledNumber( int value ) {
-		this.value = value;
-	}
-
-	@Override
-	public int intValue() {
-		return scale( value );
-	}
-
-	@Override
-	public long longValue() {
-		return scale( value );
-	}
-
-	@Override
-	public float floatValue() {
-		return scale( (float) value );
-	}
-
-	@Override
-	public double doubleValue() {
-		return scale( (float) value );
-	}
-
-	@Override
-	public int hashCode() {
-		return Integer.hashCode( value );
-	}
-
-	@Override
-	public boolean equals( Object obj ) {
-		return (obj instanceof ScaledNumber)
-			? (value == ((ScaledNumber)obj).value)
-			: false;
-	}
-
-	@Override
-	public String toString() {
-		return Integer.toString( value );
-	}
-}

flatlaf-core/src/main/resources/com/formdev/flatlaf/FlatLaf.properties

@@ -99,6 +99,11 @@ Button.defaultButtonFollowsFocus=false
 Button.default.borderWidth=1
 
 
+#---- Caret ----
+
+Caret.width={scaledInteger}1
+
+
 #---- CheckBox ----
 
 CheckBox.border=com.formdev.flatlaf.ui.FlatMarginBorder
@@ -227,7 +232,7 @@ OptionPane.maxCharactersPerLine=80
 OptionPane.iconMessageGap=16
 OptionPane.messagePadding=3
 OptionPane.buttonPadding=8
-OptionPane.buttonMinimumWidth={scaledNumber}72
+OptionPane.buttonMinimumWidth={scaledInteger}72
 OptionPane.sameSizeButtons=true
 OptionPane.setButtonMargin=false
 OptionPane.buttonOrientation=4
@@ -333,8 +338,8 @@ SplitPane.dividerSize={integer}5
 SplitPane.continuousLayout=true
 SplitPane.border=null
 SplitPane.centerOneTouchButtons=true
-SplitPane.oneTouchButtonSize={scaledNumber}6
-SplitPane.oneTouchButtonOffset={scaledNumber}2
+SplitPane.oneTouchButtonSize={scaledInteger}6
+SplitPane.oneTouchButtonOffset={scaledInteger}2
 
 SplitPaneDivider.border=null
 SplitPaneDivider.oneTouchArrowColor=@@ComboBox.buttonArrowColor