Add some gadgets which are broken on purpose to test UI error handling

extra/ui/gadgets/broken/broken.factor

@@ -0,0 +1,26 @@
+! Copyright (C) 2008 Slava Pestov.
+! See http://factorcode.org/license.txt for BSD license.
+USING: kernel accessors ui ui.gadgets ui.gadgets.buttons ui.render ;
+IN: ui.gadgets.broken
+
+! An intentionally broken gadget -- used to test UI error handling,
+! make sure that one bad gadget doesn't bring the whole system down
+
+: <bad-button> ( -- button )
+    "Click me if you dare"
+    [ "Haha" throw ]
+    <bevel-button> ;
+
+TUPLE: bad-gadget < gadget ;
+
+M: bad-gadget draw-gadget* "Lulz" throw ;
+
+M: bad-gadget pref-dim* drop { 100 100 } ;
+
+: <bad-gadget> ( -- gadget ) bad-gadget new-gadget ;
+
+: bad-gadget-test ( -- )
+    <bad-button> "Test 1" open-window
+    <bad-gadget> "Test 2" open-window ;
+
+MAIN: bad-gadget-test