netsurf/frontends/cocoa/ScrollableView.m

/*
 * Copyright 2011 Sven Weidauer <sven.weidauer@gmail.com>
 *
 * This file is part of NetSurf, http://www.netsurf-browser.org/
 *
 * NetSurf is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 *
 * NetSurf 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#import "cocoa/ScrollableView.h"

@interface ScrollableView ()

- (void) frameChangeNotification: (NSNotification *) note;

@end

@implementation ScrollableView
@synthesize minimumSize;

- (void) setMinimumSize: (NSSize)newSize
{
        minimumSize = newSize;
        [self adjustFrame];
}

- (void) adjustFrame
{
        NSSize frameSize = [[self superview] frame].size;
        [self setFrameSize: NSMakeSize( MAX( minimumSize.width, frameSize.width ),
                                        MAX( minimumSize.height, frameSize.height ) )];
}

- (void) frameChangeNotification: (NSNotification *) note
{
        [self adjustFrame];
}

- (void) viewDidMoveToSuperview
{
        if (observedSuperview) {
                [[NSNotificationCenter defaultCenter]
                        removeObserver: self
                                  name: NSViewFrameDidChangeNotification
                                object: observedSuperview];
                observedSuperview = nil;
        }

        NSView *newSuperView = [self superview];

        if (nil != newSuperView) {
                observedSuperview = newSuperView;
                [[NSNotificationCenter defaultCenter]
                        addObserver: self
                           selector: @selector(frameChangeNotification:)
                               name: NSViewFrameDidChangeNotification
                             object: observedSuperview];
                [observedSuperview setPostsFrameChangedNotifications: YES];
        }
}

@end