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/*
File IKBrowserCell.m
Release 1.2, 7 June 1994
Copyright (C) 1994 by H. Scott Roy
This code is part of IconKit, a general toolbox for drag-and-drop applications. IconKit is free for noncommercial use, but costs money for a commercial license. You should have received a copy of the license agreement with this file. If not, a copy of the license and the complete source of IconKit can be obtained from the author:
H. Scott Roy
2573 Stowe Ct.
Northbrook, IL 60062-8103
iconkit@cs.stanford.edu
For your editing convenience, this file is best viewed using an editor that automatically wraps long lines, in a fixed point font at 80 columns, with tabs every 4 spaces.
*/
/* ========================================================================== */
/*
This file defines an NXBrowser cell subclass that can keep track of an IKIconObject. Such a cell greatly simplifies the process of finding out what's been selected.
*/
#import <appkit/appkit.h>
#import "iconkit.h"
@implementation IKBrowserCell
/* ========================================================================== */
/*
An IKBrowserCell registers itself as a user of its delegate, so that it can properly respond to changes. An IKBrowserCell takes all its vital statistics directly from its delegate.
*/
- free
{
[delegate removeUser: self];
return self = [super free];
}
- setDelegate: theDelegate
{
id
old = delegate;
const char
* name;
if (!theDelegate || [theDelegate conformsTo: @protocol(IKDependency)])
delegate = theDelegate;
else
{
NXLogError ("%s does not conform to IKDependency", [theDelegate name]);
delegate = nil;
}
[delegate addUser: self];
[[[self setStringValue: (name = [delegate name]) ? name : ""]
setLoaded: YES]
setLeaf: [delegate respondsTo:@selector(isLeaf)] ?
[delegate isLeaf]:
YES];
return [old removeUser: self];
}
- delegate
{
return delegate;
}
- willFree: sender
{
if (delegate == sender) delegate = nil;
return self;
}
/* ========================================================================== */
/*
An IKBrowserCell automatically redraws itself when its delegate takes on a new name or changes its leaf status. Accordingly, it remembers its parent matrix so that it can send it drawing requests.
Redrawing is complicated slightly by the fact that the NXBrowser, rather than the parent matrix, takes care of erasing the cell background. An IKBrowserCell therefore erases things itself when it must.
*/
- drawInside: (const NXRect *) cellFrame inView: controlView;
{
char
title [1000];
id
branchIcon = [NXBrowserCell branchIcon];
NXSize
size;
matrix = controlView;
if (needsErase && ([matrix cellBackgroundGray] == -1.0))
{
PSsetgray (NX_LTGRAY);
NXRectFill (cellFrame);
}
needsErase = NO;
strcpy (title, contents);
[branchIcon getSize: &size];
IKShortenTitle (self, cellFrame->size.width - size.width);
[super drawInside: cellFrame inView: matrix];
strcpy (contents, title);
return self;
}
- didChangeName: sender
{
if ((sender == delegate) && [self isLoaded])
{
[self setStringValue: [delegate name]];
needsErase = ![self state];
[matrix updateCell: self];
}
return self;
}
- didChangeProperties: sender
{
if ((sender == delegate) && ([delegate isLeaf] != [self isLeaf]))
{
[self setLeaf: [delegate isLeaf]];
needsErase = ![self state];
[matrix updateCell: self];
}
return self;
}
@end
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