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The first implementation of scroll views.
git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/gui/trunk@2370 72102866-910b-0410-8b05-ffd578937521
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netcrep
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17 changed files with 1513 additions and 1038 deletions
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/*
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/*
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NSClipView.m
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Description...
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Copyright (C) 1996 Free Software Foundation, Inc.
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Author: Scott Christley <scottc@net-community.com>
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Date: 1996
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Author: Ovidiu Predescu <ovidiu@net-community.com>
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Date: July 1997
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This file is part of the GNUstep GUI Library.
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@ -21,113 +19,236 @@
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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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License along with this library; if not, write to the Free
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Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <Foundation/NSNotification.h>
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#include <AppKit/NSClipView.h>
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#include <AppKit/NSCursor.h>
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#include <AppKit/NSColor.h>
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#include <AppKit/NSWindow.h>
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#include <AppKit/NSGraphics.h>
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#define ASSIGN(a, b) \
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[b retain]; \
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[a release]; \
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a = b;
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#ifdef MIN
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# undef MIN
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#endif
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#define MIN(a, b) \
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({typedef _ta = (a), _tb = (b); \
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_ta _a = (a); _tb _b = (b); \
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_a < _b ? _a : _b; })
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#ifdef MAX
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# undef MAX
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#endif
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#define MAX(a, b) \
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({typedef _ta = (a), _tb = (b); \
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_ta _a = (a); _tb _b = (b); \
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_a > _b ? _a : _b; })
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@implementation NSClipView
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//
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// Class methods
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//
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+ (void)initialize
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- init
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{
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if (self == [NSClipView class])
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{
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// Initial version
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[self setVersion:1];
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}
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[super init];
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[self setAutoresizesSubviews:YES];
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[self setBackgroundColor:[[self window] backgroundColor]];
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return self;
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}
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- (void)setDocumentView:(NSView*)aView
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{
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if (_documentView)
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[_documentView removeFromSuperview];
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ASSIGN(_documentView, aView);
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[self addSubview:_documentView];
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/* Register to notifications sent by the document view */
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[_documentView setPostsFrameChangedNotifications:YES];
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[_documentView setPostsBoundsChangedNotifications:YES];
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[[NSNotificationCenter defaultCenter] addObserver:self
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selector:@selector(viewFrameChanged:)
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name:NSViewFrameDidChangeNotification object:_documentView];
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[[NSNotificationCenter defaultCenter] addObserver:self
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selector:@selector(viewBoundsChanged:)
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name:NSViewBoundsDidChangeNotification object:_documentView];
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/* TODO: invoke superview's reflectScrolledClipView:? */
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[[self superview] reflectScrolledClipView:self];
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}
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- (void)resetCursorRects
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{
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[self addCursorRect:[self bounds] cursor:_cursor];
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}
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- (void)scrollToPoint:(NSPoint)point
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{
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NSPoint currentPoint = [self bounds].origin;
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NSLog (@"scrollToPoint: current point (%f, %f), point (%f, %f)",
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currentPoint.x, currentPoint.y,
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point.x, point.y);
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point = [self constrainScrollPoint:point];
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[super setBoundsOrigin:point];
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if (_copiesOnScroll)
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/* TODO: move the visible portion of the document */;
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else {
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NSPoint frameOrigin = [_documentView frame].origin;
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NSPoint newFrameOrigin;
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newFrameOrigin.x = frameOrigin.x - (point.x - currentPoint.x);
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newFrameOrigin.y = frameOrigin.y - (point.y - currentPoint.y);
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[_documentView setPostsFrameChangedNotifications:NO];
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[_documentView setFrameOrigin:newFrameOrigin];
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[_documentView setPostsFrameChangedNotifications:YES];
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[self display];
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[[self window] flushWindow];
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}
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}
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- (NSPoint)constrainScrollPoint:(NSPoint)proposedNewOrigin
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{
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NSRect documentFrame = [self documentRect];
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NSPoint new = proposedNewOrigin;
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if (proposedNewOrigin.x < documentFrame.origin.x)
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new.x = documentFrame.origin.x;
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else if (proposedNewOrigin.x
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> documentFrame.size.width - bounds.size.width)
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new.x = documentFrame.size.width - bounds.size.width;
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if (proposedNewOrigin.y < documentFrame.origin.y)
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new.y = documentFrame.origin.y;
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else if (proposedNewOrigin.y
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> documentFrame.size.height - bounds.size.height)
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new.y = documentFrame.size.height - bounds.size.height;
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return new;
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}
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//
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// Managing the Document View
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//
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- (NSRect)documentRect
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{
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return NSZeroRect;
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}
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NSRect documentFrame = [_documentView frame];
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NSRect clipViewBounds = [self bounds];
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NSRect rect;
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- (id)documentView
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{
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return nil;
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rect.origin = documentFrame.origin;
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rect.size.width = MAX(documentFrame.size.width, clipViewBounds.size.width);
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rect.size.height = MAX(documentFrame.size.height,
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clipViewBounds.size.height);
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return rect;
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}
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- (NSRect)documentVisibleRect
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{
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return NSZeroRect;
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NSRect documentBounds = [_documentView bounds];
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NSRect clipViewBounds = [self bounds];
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NSRect rect;
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rect.origin = clipViewBounds.origin;
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rect.size.width = MIN(documentBounds.size.width, clipViewBounds.size.width);
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rect.size.height = MIN(documentBounds.size.height,
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clipViewBounds.size.height);
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return rect;
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}
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- (void)setDocumentView:(NSView *)aView
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- (BOOL)autoscroll:(NSEvent*)theEvent
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{
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return 0;
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}
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- (void)viewBoundsChanged:(NSNotification*)aNotification
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{
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[[self superview] reflectScrolledClipView:self];
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}
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- (void)viewFrameChanged:(NSNotification*)aNotification
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{
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[[self superview] reflectScrolledClipView:self];
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}
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- (void)scaleUnitSquareToSize:(NSSize)newUnitSize
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{
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[super scaleUnitSquareToSize:newUnitSize];
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[[self superview] reflectScrolledClipView:self];
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}
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- (void)setBoundsOrigin:(NSPoint)aPoint
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{
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[super setBoundsOrigin:aPoint];
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[[self superview] reflectScrolledClipView:self];
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}
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- (void)setBoundsSize:(NSSize)aSize
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{
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[super setBoundsSize:aSize];
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[[self superview] reflectScrolledClipView:self];
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}
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- (void)setFrameSize:(NSSize)aSize
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{
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[super setFrameSize:aSize];
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[[self superview] reflectScrolledClipView:self];
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}
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- (void)setFrameOrigin:(NSPoint)aPoint
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{
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[super setFrameOrigin:aPoint];
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[[self superview] reflectScrolledClipView:self];
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}
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- (void)setFrame:(NSRect)rect
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{
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[super setFrame:rect];
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[[self superview] reflectScrolledClipView:self];
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}
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- (void)translateOriginToPoint:(NSPoint)aPoint
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{
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[super translateOriginToPoint:aPoint];
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[[self superview] reflectScrolledClipView:self];
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}
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- (id)documentView { return _documentView; }
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- (void)setCopiesOnScroll:(BOOL)flag { _copiesOnScroll = flag; }
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- (BOOL)copiesOnScroll { return _copiesOnScroll; }
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- (void)setDocumentCursor:(NSCursor*)aCursor { ASSIGN(_cursor, aCursor); }
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- (NSCursor*)documentCursor { return _cursor; }
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- (NSColor*)backgroundColor { return _backgroundColor; }
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- (BOOL)isFlipped { return [_documentView isFlipped]; }
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- (BOOL)acceptsFirstResponder { return _documentView != nil; }
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- (void)setBackgroundColor:(NSColor*)aColor
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{
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ASSIGN(_backgroundColor, aColor);
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}
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/* Disable rotation of clip view */
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- (void)rotateByAngle:(float)angle
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{}
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//
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// Setting the Cursor
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//
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- (NSCursor *)documentCursor
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{
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return nil;
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}
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- (void)setDocumentCursor:(NSCursor *)anObject
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- (void)setBoundsRotation:(float)angle
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{}
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//
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// Setting the Background Color
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//
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- (NSColor *)backgroundColor
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{
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return nil;
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}
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- (void)setBackgroundColor:(NSColor *)color
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- (void)setFrameRotation:(float)angle
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{}
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//
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// Scrolling
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//
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- (BOOL)autoscroll:(NSEvent *)theEvent
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/* Managing responder chain */
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- (BOOL)becomeFirstResponder
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{
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return NO;
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}
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- (NSPoint)constrainScrollPoint:(NSPoint)newOrigin
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{
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return NSZeroPoint;
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}
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- (BOOL)copiesOnScroll
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{
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return NO;
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}
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- (void)scrollToPoint:(NSPoint)newOrigin
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{}
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- (void)setCopiesOnScroll:(BOOL)flag
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{}
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//
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// Responding to a Changed Frame
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//
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- (void)viewFrameChanged:(NSNotification *)notification
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{}
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//
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// NSCoding protocol
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//
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- (void)encodeWithCoder:aCoder
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{
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[super encodeWithCoder:aCoder];
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}
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- initWithCoder:aDecoder
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{
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[super initWithCoder:aDecoder];
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return self;
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return [_documentView becomeFirstResponder];
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}
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@end
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