lupin/LupinBrowser/LPOutlineView.m

/*
 * Copyright (c) 2004-2005 The Lupin Project. 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 THE LUPIN PROJECT ``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 THE LUPIN PROJECT 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 "LPOutlineView.h"

@implementation LPOutlineView

- (void)dragImage:(NSImage *)anImage at:(NSPoint)viewLocation offset:(NSSize)initialOffset event:(NSEvent *)event pasteboard:(NSPasteboard *)pboard source:(id)sourceObj slideBack:(BOOL)slideFlag
{
        float x,y;
        x = y = 0;
        NSImage* dragImage = [self dragImageForSelectedRows:event x:&x y:&y];
        NSPoint point = NSMakePoint(x+20,y); //NSBrowserCell���������������������
        NSSize size = NSMakeSize(0,0);
        [super dragImage:dragImage at:point offset:size event:event pasteboard:pboard source:sourceObj slideBack:slideFlag];
}

- (NSImage*)dragImageForSelectedRows:(NSEvent*)event x:(float*)x y:(float*)y
{
        int numOfRows = [self numberOfRows];
        int maxIndexOfSelected = 0;
        int i;
        NSMutableArray* selectedRows = [NSMutableArray array];
        for (i=0;i<numOfRows;i++) {
                if ([self isRowSelected:i]) {
                        [selectedRows addObject:[NSNumber numberWithInt:i]];
                        maxIndexOfSelected = i;
                }
        }
        NSPoint point = NSMakePoint(0,0); //������������������������������������������������
        *x = 1;
        *y = (maxIndexOfSelected+1)*([self rowHeight]+[self intercellSpacing].height);
        NSPointPointer pointer = &point;
        return [super dragImageForRows:selectedRows event:event dragImageOffset:pointer];
}
@end