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/* -*-objc-*-
   NSSplitView.h

   Allows multiple views to share a region in a window

   Copyright (C) 1996 Free Software Foundation, Inc.

   Author:  Robert Vasvari <vrobi@ddrummer.com>
   Date: Jul 1998
   
   This file is part of the GNUstep GUI Library.

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.

   This library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with this library; see the file COPYING.LIB.
   If not, see <http://www.gnu.org/licenses/> or write to the 
   Free Software Foundation, 51 Franklin Street, Fifth Floor, 
   Boston, MA 02110-1301, USA.
*/ 

#ifndef _GNUstep_H_NSSplitView
#define _GNUstep_H_NSSplitView

#import <AppKit/NSView.h>

@class NSImage, NSColor, NSNotification;

#if OS_API_VERSION(MAC_OS_X_VERSION_10_5, GS_API_LATEST)
enum {
  NSSplitViewDividerStyleThick = 1,
  NSSplitViewDividerStyleThin = 2,
#if OS_API_VERSION(MAC_OS_X_VERSION_10_6, GS_API_LATEST)
  NSSplitViewDividerStylePaneSplitter = 3,
#endif
};
typedef NSInteger NSSplitViewDividerStyle;
#endif

@interface NSSplitView : NSView
{
  id	      _delegate;
  NSImage  *_dimpleImage;
  NSColor  *_backgroundColor; 
  NSColor  *_dividerColor;
  NSString *_autosaveName;
  CGFloat   _dividerWidth;
  CGFloat   _draggedBarWidth;
  BOOL      _isVertical;
  BOOL      _never_displayed_before;
  BOOL      _is_pane_splitter;
}

- (void) setDelegate: (id)anObject;
- (id) delegate;
- (void) adjustSubviews;
- (void) drawDividerInRect: (NSRect)aRect;
- (CGFloat) dividerThickness;

/* Vertical splitview has a vertical split bar */ 
- (void) setVertical: (BOOL)flag;
- (BOOL) isVertical;

#if OS_API_VERSION(GS_API_MACOSX, GS_API_LATEST)
- (BOOL) isSubviewCollapsed: (NSView *)subview;
- (BOOL) isPaneSplitter;
- (void) setIsPaneSplitter: (BOOL)flag;
#endif

#if OS_API_VERSION(MAC_OS_X_VERSION_10_5, GS_API_LATEST)
- (void) setAutosaveName: (NSString *)autosaveName;
- (NSString *) autosaveName;

- (CGFloat) maxPossiblePositionOfDividerAtIndex: (NSInteger)dividerIndex;
- (CGFloat) minPossiblePositionOfDividerAtIndex: (NSInteger)dividerIndex;
- (void) setPosition: (CGFloat)position ofDividerAtIndex: (NSInteger)dividerIndex;

- (NSColor *) dividerColor;
- (NSSplitViewDividerStyle) dividerStyle;
- (void) setDividerStyle: (NSSplitViewDividerStyle)dividerStyle;
#endif

@end

#if OS_API_VERSION(GS_API_NONE, GS_API_NONE)
@interface NSSplitView (GNUstepExtra)
/* extra methods to make it more usable */
- (CGFloat) draggedBarWidth;
- (void) setDraggedBarWidth: (CGFloat)newWidth;
/* if flag is yes, dividerThickness is reset to the height/width of the dimple
   image + 1;
*/
- (void) setDimpleImage: (NSImage *)anImage resetDividerThickness: (BOOL)flag;
- (NSImage *) dimpleImage;
- (NSColor *) backgroundColor;
- (void) setBackgroundColor: (NSColor *)aColor;
- (void) setDividerColor: (NSColor *)aColor;
@end
#endif 

@interface NSObject (NSSplitViewDelegate)
- (void) splitView: (NSSplitView *)sender 
resizeSubviewsWithOldSize: (NSSize)oldSize;

- (void) splitView: (NSSplitView *)sender 
constrainMinCoordinate: (CGFloat *)min 
     maxCoordinate: (CGFloat *)max 
       ofSubviewAt: (NSInteger)offset;

- (CGFloat) splitView: (NSSplitView *)sender
constrainSplitPosition: (CGFloat)proposedPosition
	ofSubviewAt: (NSInteger)offset;

- (void) splitViewWillResizeSubviews: (NSNotification *)notification;
- (void) splitViewDidResizeSubviews: (NSNotification *)notification;

#if OS_API_VERSION(GS_API_MACOSX, GS_API_LATEST)
- (BOOL) splitView: (NSSplitView *)sender
canCollapseSubview: (NSView *)subview;

- (CGFloat) splitView: (NSSplitView *)sender
constrainMaxCoordinate: (CGFloat)proposedMax
	ofSubviewAt: (NSInteger)offset;

- (CGFloat) splitView: (NSSplitView *)sender
constrainMinCoordinate: (CGFloat)proposedMin
	ofSubviewAt: (NSInteger)offset;
#endif

#if OS_API_VERSION(MAC_OS_X_VERSION_10_5, GS_API_LATEST)
- (NSRect) splitView: (NSSplitView *)splitView
additionalEffectiveRectOfDividerAtIndex: (NSInteger)dividerIndex;

- (NSRect) splitView: (NSSplitView *)splitView
       effectiveRect: (NSRect)proposedEffectiveRect
        forDrawnRect: (NSRect)drawnRect
    ofDividerAtIndex: (NSInteger)dividerIndex;

- (BOOL) splitView: (NSSplitView *)splitView 
shouldCollapseSubview: (NSView *)subview
forDoubleClickOnDividerAtIndex: (NSInteger)dividerIndex;

- (BOOL) splitView: (NSSplitView *)splitView
shouldHideDividerAtIndex: (NSInteger)dividerIndex;
#endif

#if OS_API_VERSION(MAC_OS_X_VERSION_10_6, GS_API_LATEST)
- (BOOL) splitView: (NSSplitView *)splitView
shouldAdjustSizeOfSubview: (NSView *)view;
#endif
@end

/* Notifications */
APPKIT_EXPORT NSString *NSSplitViewDidResizeSubviewsNotification;
APPKIT_EXPORT NSString *NSSplitViewWillResizeSubviewsNotification;

#endif