# HG changeset patch
# User Claus Gittinger <cg@exept.de>
# Date 974638389 -3600
# Node ID 180804d7c28f19ad7f93c719c02ba52812248445
# Parent  f39893848245f6bd7fa7294a2a7a2d437b8f90a6
added make grayScale

diff -r f39893848245 -r 180804d7c28f ImageEditor.st
--- a/ImageEditor.st	Sun Nov 19 13:28:45 2000 +0100
+++ b/ImageEditor.st	Sun Nov 19 13:53:09 2000 +0100
@@ -1238,6 +1238,11 @@
                   #translateLabel: true
                   #value: #reduceNumberOfColors
                 )
+               #(#MenuItem
+                  #label: 'Make GrayScale Image'
+                  #translateLabel: true
+                  #value: #makeGrayScale
+                )
                )
               nil
               nil
@@ -1642,8 +1647,9 @@
 !
 
 update:something with:aParameter from:changedObject
-    |clrIndex|
-
+    |clrIndex img|
+
+    img := self image.
     changedObject == self listOfColors ifTrue:[
         something == #at: ifTrue:[
             "/ colormap entry changed at aParameter
@@ -1653,7 +1659,7 @@
                 clrIndex := clrIndex - 1.
             ].
 
-            self image colorMap at:clrIndex put:(changedObject at:aParameter).
+            img colorMap at:clrIndex put:(changedObject at:aParameter).
             self colorMapChanged.
             ^ self
         ].
@@ -1666,16 +1672,18 @@
 
     changedObject == imageEditView ifTrue:[
         something == #imageColors ifTrue:[
-            self listOfColors contents:self image colorMap.
+            self listOfColors contents:img colorMap.
             self findColorMapMode.
             ^ self.
         ].
         something == #image ifTrue:[
-            self imagePreView image:self image.
+            self imagePreView image:img.
+            self listOfColors contents:img colorMap.
+            self findColorMapMode.
             ^ self.
         ].
         something == #subImageIn ifTrue:[
-            self imagePreView image ~~ self image ifTrue:[
+            self imagePreView image ~~ img ifTrue:[
                 self halt:'should not happen'.
             ].
             self imagePreView redraw:aParameter.
@@ -2474,6 +2482,23 @@
     "Modified: / 15.9.1998 / 17:53:32 / cg"
 !
 
+makeGrayScale
+    |anyChange img|
+
+    self withExecuteCursorDo:[
+        anyChange := imageEditView makeGrayScale.
+        anyChange ifFalse:[
+            Dialog warn:'Image unchanged'.
+        ] ifTrue:[
+            img := imageEditView image.
+            imageEditView image:img.
+            self listOfColors contents:(img colorMap).
+            self findColorMapMode.
+            self updateLabelsAndHistory.
+        ]
+    ].
+!
+
 reduceNumberOfColors
     |s n anyChange img|
 
@@ -2485,7 +2510,6 @@
         ^ self
     ].
 
-    imageEditView makeUndo.
     self withExecuteCursorDo:[
         anyChange := imageEditView reduceColorResolutionBy:n.
         anyChange ifFalse:[
@@ -2803,7 +2827,7 @@
 doUndo
     "reverses last edit action"
 
-    imageEditView undo
+    imageEditView undo.
 ! !
 
 !ImageEditor methodsFor:'user actions - loading'!