/* * Copyright (C) 2003 Apple Computer, Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #import "KWQNSViewExtras.h" @implementation NSView (KWQNSViewExtras) - (void)_KWQ_scrollFrameToVisible { [self _KWQ_scrollRectToVisible:[self bounds] forceCentering:NO]; } - (void)_KWQ_scrollRectToVisible:(NSRect)rect forceCentering:(BOOL)forceCentering { [self _KWQ_scrollRectToVisible:rect inView:self forceCentering:forceCentering]; } - (void)_KWQ_scrollRectToVisible:(NSRect)rect inView:(NSView *)view forceCentering:(BOOL)forceCentering { [[self superview] _KWQ_scrollRectToVisible:rect inView:view forceCentering:forceCentering]; } - (void)_KWQ_scrollPointRecursive:(NSPoint)p { [self _KWQ_scrollPointRecursive:p inView:self]; } - (void)_KWQ_scrollPointRecursive:(NSPoint)p inView:(NSView *)view { p = [self convertPoint: p fromView:view]; [self scrollPoint: p]; [[self superview] _KWQ_scrollPointRecursive:p inView:self]; } @end @implementation NSClipView (KWQNSViewExtras) - (void)_KWQ_scrollRectToVisible:(NSRect)rect inView:(NSView *)view forceCentering:(BOOL)forceCentering { NSRect exposeRect = [self convertRect:rect fromView:view]; NSRect visibleRect = [self bounds]; if (forceCentering || !NSContainsRect(visibleRect, exposeRect)) { // Make an expose rectangle that will end up centering the passed-in rectangle horizontally. if (exposeRect.size.width >= visibleRect.size.width) { if (forceCentering) { float expLeft = exposeRect.origin.x; float expRight = exposeRect.origin.x + exposeRect.size.width; float visLeft = visibleRect.origin.x; float visRight = visibleRect.origin.x + visibleRect.size.width; float diffLeft = visLeft - expLeft; float diffRight = expRight - visRight; if (diffLeft >= 0 && diffRight >= 0) { // Exposed rect fills the visible rect. // We don't want the view to budge. exposeRect.origin.x = visLeft; } else if (diffLeft < 0) { // Scroll so left of visible region shows left of expose rect. // Leave expose origin as it is to make this happen. } else { // Scroll so right of visible region shows right of expose rect. exposeRect.origin.x = expRight - visibleRect.size.width; } } exposeRect.size.width = visibleRect.size.width; } else { exposeRect.origin.x -= (visibleRect.size.width - exposeRect.size.width) / 2.0; exposeRect.size.width += (visibleRect.size.width - exposeRect.size.width); } // Make an expose rectangle that will end up centering the passed-in rectangle vertically. if (exposeRect.size.height >= visibleRect.size.height) { if (forceCentering) { if ([self isFlipped]) { float expTop = exposeRect.origin.y; float expBottom = exposeRect.origin.y + exposeRect.size.height; float visTop = visibleRect.origin.y; float visBottom = visibleRect.origin.y + visibleRect.size.height; float diffTop = visTop - expTop; float diffBottom = expBottom - visBottom; if (diffTop >= 0 && diffBottom >= 0) { // Exposed rect fills the visible rect. // We don't want the view to budge. exposeRect.origin.y = visTop; } else if (diffTop < 0) { // Scroll so top of visible region shows top of expose rect. // Leave expose origin as it is to make this happen. } else { // Scroll so bottom of visible region shows bottom of expose rect. exposeRect.origin.y = expBottom - visibleRect.size.height; } } else { float expTop = exposeRect.origin.y + exposeRect.size.height; float expBottom = exposeRect.origin.y; float visTop = visibleRect.origin.y + visibleRect.size.height; float visBottom = visibleRect.origin.y; float diffTop = expTop - visTop; float diffBottom = visBottom - expBottom; if (diffTop >= 0 && diffBottom >= 0) { // Exposed rect fills the visible rect. // We don't want the view to budge. exposeRect.origin.y = visBottom; } else if (diffTop < 0) { // Scroll so top of visible region shows top of expose rect. exposeRect.origin.y = expTop + visibleRect.size.height; } else { // Scroll so bottom of visible region shows bottom of expose rect. // Leave expose origin as it is to make this happen. } } } exposeRect.size.height = visibleRect.size.height; } else { if ([self isFlipped]) { exposeRect.origin.y -= (visibleRect.size.height - exposeRect.size.height) / 2.0; } else { exposeRect.origin.y += (visibleRect.size.height - exposeRect.size.height) / 2.0; } exposeRect.size.height += (visibleRect.size.height - exposeRect.size.height); } [self scrollRectToVisible:exposeRect]; } [super _KWQ_scrollRectToVisible:rect inView:view forceCentering:forceCentering]; } @end