Add horiz and vert elastiticty properties and constants

git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/gui/trunk@38920 72102866-910b-0410-8b05-ffd578937521

ChangeLog

@@ -1,3 +1,9 @@
+2015-08-23 Riccardo Mottola <rm@gnu.org>
+
+	* Headers/AppKit/NSScrollView.h
+	* Source/NSScrollView.m
+	Add horiz and vert elastiticty properties and constants.
+
 2015-08-23 Fred Kiefer <FredKiefer@gmx.de>
 
 	* Source/NSBundleAdditions.m,

Headers/AppKit/NSScrollView.h

@@ -4,7 +4,7 @@
    A view that allows you to scroll a document view that's too big to display
    entirely on a window.
 
-   Copyright (C) 1996 Free Software Foundation, Inc.
+   Copyright (C) 1996-2015 Free Software Foundation, Inc.
 
    Author: Ovidiu Predescu <ovidiu@net-community.com>
    Date: July 1997
@@ -34,6 +34,15 @@
 
 #import <AppKit/NSView.h>
 
+enum
+{
+  NSScrollElasticityAutomatic = 0,
+  NSScrollElasticityNone      = 1,
+  NSScrollElasticityAllowed   = 2
+};
+typedef NSInteger NSScrollElasticity;
+
+
 @class NSClipView;
 @class NSRulerView;
 @class NSColor;
@@ -64,6 +73,8 @@
   BOOL _hasHeaderView;
   BOOL _hasCornerView;
   BOOL _autohidesScrollers;
+  NSScrollElasticity _horizScrollElasticity;
+  NSScrollElasticity _vertScrollElasticity;
 }
 
 /* Calculating layout */
@@ -142,6 +153,12 @@
 - (BOOL)autohidesScrollers;
 - (void)setAutohidesScrollers:(BOOL)flag;
 #endif
+#if OS_API_VERSION(MAC_OS_X_VERSION_10_7, GS_API_LATEST)
+- (NSScrollElasticity)horizontalScrollElasticity;
+- (void)setHorizontalScrollElasticity:(NSScrollElasticity)value;
+- (NSScrollElasticity)verticalScrollElasticity;
+- (void)setVerticalScrollElasticity:(NSScrollElasticity)value;
+#endif
 
 /* Updating display after scrolling */
 - (void)reflectScrolledClipView:(NSClipView*)aClipView;

Source/NSScrollView.m

@@ -224,6 +224,8 @@ static CGFloat scrollerWidth;
   // For compatibility the ruler should be present but not visible.
   [self setHasHorizontalRuler: YES];
   [self tile];
+  _horizScrollElasticity = NSScrollElasticityAutomatic;
+  _vertScrollElasticity = NSScrollElasticityAutomatic;
 
   [[NSNotificationCenter defaultCenter]
     addObserver: self
@@ -398,6 +400,27 @@ static CGFloat scrollerWidth;
   _autohidesScrollers = flag;
 }
 
+- (NSScrollElasticity)horizontalScrollElasticity
+{
+  return _horizScrollElasticity;
+}
+
+- (void)setHorizontalScrollElasticity:(NSScrollElasticity)value
+{
+  _horizScrollElasticity = value;
+}
+
+- (NSScrollElasticity)verticalScrollElasticity
+{
+  return _vertScrollElasticity;
+}
+
+
+- (void)setVerticalScrollElasticity:(NSScrollElasticity)value
+{
+  _vertScrollElasticity = value;
+}
+
 - (void) scrollWheel: (NSEvent *)theEvent
 {
   NSRect clipViewBounds;