Corrected the handling of the cellClass so that every subclass of

NSControl, that uses a cell, has its own implementaion of
[cellClass] and [setCellClass].


git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/gui/trunk@9544 72102866-910b-0410-8b05-ffd578937521

Source/NSImageView.m

@@ -29,13 +29,41 @@
 #include <AppKit/NSImageCell.h>
 #include <AppKit/NSImageView.h>
 
+/*
+ * Class variables
+ */
+static Class usedCellClass;
+static Class imageCellClass;
+
 @implementation NSImageView
 
+//
+// Class methods
+//
++ (void) initialize
+{
+  if (self == [NSImageView class])
+    {
+      [self setVersion: 1];
+      imageCellClass = [NSImageCell class];
+      usedCellClass = imageCellClass;
+    }
+}
+
+/*
+ * Setting the Cell class
+ */
 + (Class) cellClass
 {
-  return [NSImageCell class];
+  return usedCellClass;
 }
 
++ (void) setCellClass: (Class)factoryId
+{
+  usedCellClass = factoryId ? factoryId : imageCellClass;
+}
+
+
 - (id) init
 {
   return [self initWithFrame: NSZeroRect];
@@ -45,9 +73,6 @@
 {
   [super initWithFrame: aFrame];
 
-  // allocate the image cell
-  [self setCell: [[NSImageCell alloc] init]];
-
   // set the default values
   [self setImageAlignment: NSImageAlignCenter];
   [self setImageFrameStyle: NSImageFrameNone];