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4dd58372f6
* move GPS headers into a new backend. * define GSContext.h/GSContext.m as abstract super for all drawing destinations (eliminates the need for DPS, GPS, DGS at the root of the AppKit) add appropriate defintion to various classes. * NSMatrix.m add abstract backend code from xraw (eliminate backend). * NSSlider.m add abstract backend code from xraw (eliminate backend). * NSSliderCell.m add abstract backend code from xraw (eliminate backend). * NSSplitView.m add abstract backend code from xraw (eliminate backend). replace private divider highlight method with NSHighlightRect() * NSWindow.m add class method to create backend specific window view. * NSTextField.m add abstract backend code from xraw (eliminate backend). * NSForm.m add abstract backend code from xraw (eliminate backend). * NSFormCell.m add abstract backend code from xraw (eliminate backend). * NSColorWell.m add abstract backend code from xraw (eliminate backend). * NSButton.m add abstract backend code from xraw (eliminate backend). * NSControl.m add abstract backend code from xraw (eliminate backend). * NSBox.m add abstract backend code from xraw (eliminate backend). * NSBrowser.m add abstract backend code from xraw (eliminate backend). * NSBrowserCell.m add abstract backend code from xraw (eliminate backend). git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/gui/trunk@3321 72102866-910b-0410-8b05-ffd578937521
144 lines
3.6 KiB
Objective-C
144 lines
3.6 KiB
Objective-C
/*
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GSContext.m
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Abstract superclass for all types of Contexts (drawing destinations).
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Copyright (C) 1996 Free Software Foundation, Inc.
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Author: Adam Fedor <fedor@gnu.org>
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Date: Nov 1998
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Author: Felipe A. Rodriguez <far@ix.netcom.com>
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Date: Nov 1998
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This file is part of the GNUstep GUI Library.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; see the file COPYING.LIB.
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If not, write to the Free Software Foundation,
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59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <gnustep/gui/config.h>
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#include <Foundation/NSString.h>
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#include <Foundation/NSArray.h>
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#include <Foundation/NSDictionary.h>
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#include <Foundation/NSException.h>
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#include <Foundation/NSData.h>
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#include "AppKit/GSContext.h"
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NSZone *_globalGSZone = NULL; // The memory zone where all
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// global objects are allocated
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// from (Contexts are also
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// allocated from this zone)
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//
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// Class variables
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//
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static Class contextConcreteClass; // actual class of GSContext's
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static NSMutableArray *contextList; // list of drawing destinations
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static GSContext *_currentGSContext = nil; // the current context
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@implementation GSContext
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//
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// Class methods
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//
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+ (void)initialize
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{
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if (self == (contextConcreteClass = [GSContext class]))
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{
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contextList = [[NSMutableArray arrayWithCapacity:2] retain];
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NSDebugLog(@"Initialize GSContext class\n");
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[self setVersion:1]; // Initial version
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}
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}
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+ (void) setConcreteClass: (Class)c { contextConcreteClass = c; }
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+ (Class) concreteClass { return contextConcreteClass; }
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+ allocWithZone: (NSZone*)z
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{
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return NSAllocateObject(contextConcreteClass, 0, z);
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}
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+ contextWithInfo: (NSDictionary *)info;
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{
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GSContext *context;
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NSAssert(contextConcreteClass, @"Error: No default GSContext is set\n");
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context = [[contextConcreteClass allocWithZone: _globalGSZone]
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initWithContextInfo: info];
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[context autorelease];
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return context;
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}
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+ (GSContext *) currentContext { return _currentGSContext; }
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+ (void) setCurrentContext: (GSContext *)context
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{
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_currentGSContext = context;
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}
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+ (void) destroyContext:(GSContext *) context // remove context from the
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{ // list so that it gets
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[contextList removeObject: context]; // deallocated with the
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} // next autorelease pool
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//
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// Instance methods
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//
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- init
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{
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return [self initWithContextInfo: nil];
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}
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- initWithContextInfo: (NSDictionary *)info
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{ // designated initializer
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[super init]; // for GSContext class
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[contextList addObject: self];
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[GSContext setCurrentContext: self];
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if(info)
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context_info = [info retain];
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return self;
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}
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- (BOOL)isDrawingToScreen
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{
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return NO;
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}
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- (NSMutableData *)mutableData
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{
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return context_data;
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}
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- (void) destroy // remove self from context
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{ // list so that self gets
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[GSContext destroyContext: self]; // deallocated with the
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} // next autorelease pool
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- (void) dealloc
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{
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DESTROY(context_data);
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[super dealloc];
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}
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@end
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