fix some bugs.

EiichiroIto · Feb 3, 2022 · 3534982 · 3534982
1 parent 5d7b277
commit 3534982
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Showing 3 changed files with 7 additions and 0 deletions.
diff --git a/filetree/Gratch.package/GrNativeWorld.class/instance/isEmpty.st b/filetree/Gratch.package/GrNativeWorld.class/instance/isEmpty.st
@@ -0,0 +1,3 @@
+testing
+isEmpty
+	^ self nodes size = 0
diff --git a/filetree/Gratch.package/SpGratch.class/instance/exportGDF.st b/filetree/Gratch.package/SpGratch.class/instance/exportGDF.st
@@ -1,3 +1,5 @@
 menu actions
 exportGDF
+	grWorld isEmpty
+		ifTrue: [ ^ self ].
 	self export: GratchGDFExporter new extension: self gdfExtension
diff --git a/filetree/Gratch.package/SpGratch.class/instance/saveGraphAsImage.st b/filetree/Gratch.package/SpGratch.class/instance/saveGraphAsImage.st
@@ -1,6 +1,8 @@
 menu actions
 saveGraphAsImage
 	| file saveForm |
+	grWorld isEmpty
+		ifTrue: [ ^ self ].
 	saveForm := self graphFormExtent: 480 @ 480.
 	saveForm ifNil: [ ^ self ].
 	file := UIManager default