ScaledImageIcon: do not throw exceptions if image has invalid size (e.g. not found); instead paint a red rectangle (similar to FlatSVGIcon)

CHANGELOG.md

@@ -13,6 +13,8 @@ FlatLaf Change Log
   button.
 - Arrow buttons in ComboBox, Spinner, ScrollBar and TabbedPane: Show "pressed"
   feedback only for left mouse button.
+- ScaledImageIcon: Do not throw exceptions if image was has invalid size (e.g.
+  not found). Instead, paint a red rectangle (similar to `FlatSVGIcon`).
 
 
 ## 2.5

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

@@ -16,6 +16,7 @@
 
 package com.formdev.flatlaf.util;
 
+import java.awt.Color;
 import java.awt.Component;
 import java.awt.Graphics;
 import java.awt.Graphics2D;
@@ -102,6 +103,13 @@ debug*/
 		int imageWidth = image.getWidth( null );
 		int imageHeight = image.getHeight( null );
 
+		// paint red rectangle if image has invalid size (e.g. not found)
+		if( imageWidth < 0 || imageHeight < 0 ) {
+			g.setColor( Color.red );
+			g.fillRect( x, y, getIconWidth(), getIconHeight() );
+			return;
+		}
+
 		// scale image if necessary to destination size
 		if( imageWidth != destImageWidth || imageHeight != destImageHeight ) {
 			// determine scaling method; default is "quality"