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144 lines
3.3 KiB
Objective-C
144 lines
3.3 KiB
Objective-C
/*
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NSCachedImageRep.m
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Cached image representation.
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Copyright (C) 1996 Free Software Foundation, Inc.
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Author: Adam Fedor <fedor@colorado.edu>
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Date: Feb 1996
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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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/*
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Keeps a representation of an image in an off-screen window. If the
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message initFromWindow:rect: is sent with a nil window, one is created
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using the rect information.
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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/NSException.h>
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#include <AppKit/NSCachedImageRep.h>
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#include <AppKit/NSWindow.h>
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@interface GSCacheW : NSWindow
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@end
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@implementation GSCacheW
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- (void) initDefaults
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{
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[super initDefaults];
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[self setExcludedFromWindowsMenu: YES];
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}
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@end
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/* Backend protocol - methods that must be implemented by the backend to
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complete the class */
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@protocol NXCachedImageRepBackend
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- (BOOL) draw;
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@end
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@implementation NSCachedImageRep
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// Initializing an NSCachedImageRep
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- (id) initWithSize: (NSSize)aSize
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depth: (NSWindowDepth)aDepth
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separate: (BOOL)separate
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alpha: (BOOL)alpha
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{
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NSWindow *win;
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NSRect frame;
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frame.origin = NSMakePoint(0,0);
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frame.size = aSize;
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win = [[GSCacheW alloc] initWithContentRect: frame
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styleMask: NSBorderlessWindowMask
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backing: NSBackingStoreRetained
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defer: NO];
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self = [self initWithWindow: win rect: frame];
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[win release];
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return self;
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}
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- (id) initWithWindow: (NSWindow *)win rect: (NSRect)rect
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{
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[super init];
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_window = [win retain];
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_rect = rect;
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/* Either win or rect must be non-NULL. If rect is empty, we get the
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frame info from the window. If win is nil we create it from the
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rect information. */
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if (NSIsEmptyRect(_rect))
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{
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if (!_window)
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{
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[NSException raise: NSInvalidArgumentException
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format: @"Must specify either window or rect when "
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@"creating NSCachedImageRep"];
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}
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_rect = [_window frame];
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}
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if (!_window)
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_window = [[GSCacheW alloc] initWithContentRect: _rect
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styleMask: NSBorderlessWindowMask
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backing: NSBackingStoreRetained
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defer: NO];
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return self;
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}
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- (void) dealloc
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{
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[_window release];
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[super dealloc];
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}
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// Getting the Representation
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- (NSRect) rect
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{
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return _rect;
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}
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- (NSWindow *) window
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{
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return _window;
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}
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- (BOOL)draw
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{
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NSCopyBits([_window gState], _rect, _rect.origin);
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return NO;
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}
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// NSCoding protocol
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- (void) encodeWithCoder: (NSCoder*)aCoder
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{
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}
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- (id) initWithCoder: (NSCoder*)aDecoder
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{
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return self;
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}
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@end
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