2007-01-07 Roman Kennke <roman@kennke.org>

	PR 30337
	* java/awt/Component.java
	(getFontImpl): Return null when the component has no font set
	and also has no parent yet.
	* javax/swing/plaf/basic/BasicComboBoxUI.java
	(PropertyChangeHandler.propertyChange): Only add editor when combo
	box is editable. Avoid fetching the property name repeatedly.
	Invalidate when renderer or prototypeDisplayValue change.
	(uninstallComponents): Unconfigure everything and then remove all
	components.
	* javax/swing/plaf/basic/BasicComboPopup.java
	(uninstallingUI): Don't nullify list model.
	* javax/swing/plaf/metal/MetalComboBoxUI.java
	(createArrowButton): Pass currentValuePane to the MetalComboBoxButton
	constructor rather than a new (unconnected) CellRendererPane.

1 files changed, 6 insertions, 1 deletions

diff --git a/java/awt/Component.java b/java/awt/Component.java
index ac045d5d3..7f2cbb423 100644
--- a/java/awt/Component.java
+++ b/java/awt/Component.java
@@ -1198,7 +1198,12 @@ public abstract class Component
         if (p != null)
           f = p.getFontImpl();
         else
-          f = new Font("Dialog", Font.PLAIN, 12);
+          {
+            // It is important to return null here and not some kind of default
+            // font, otherwise the Swing UI would not install its fonts because
+            // it keeps non-UIResource fonts.
+            f = null;
+          }
       }
     return f;
   }