/*
 *  R.app : a Cocoa front end to: "R A Computer Language for Statistical Data Analysis"
 *  
 *  R.app Copyright notes:
 *                     Copyright (C) 2004-5  The R Foundation
 *                     written by Stefano M. Iacus and Simon Urbanek
 *
 *                  
 *  R Copyright notes:
 *                     Copyright (C) 1995-1996   Robert Gentleman and Ross Ihaka
 *                     Copyright (C) 1998-2001   The R Development Core Team
 *                     Copyright (C) 2002-2004   The R Foundation
 *
 *  This program 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; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program 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.
 *
 *  A copy of the GNU General Public License is available via WWW at
 *  http://www.gnu.org/copyleft/gpl.html.  You can also obtain it by
 *  writing to the Free Software Foundation, Inc., 59 Temple Place,
 *  Suite 330, Boston, MA  02111-1307  USA.
 */

#import "RGUI.h"
#import "SelectList.h"

static SelectList *sharedController = nil;

@implementation SelectList

BOOL IsSelectList;

- (id)init
{
    self = [super init];
    if (self) {
		sharedController = self;
		[listDataSource setTarget: self];
		totalItems = 0;
		listItem = 0;
		result = -1;
		title = nil;
		running = NO;
    }
	
    return self;
}

+ (SelectList*) sharedController
{
	return sharedController;
}

- (void)dealloc {
	[super dealloc];
}

/* These two routines are needed to update the SelectList TableView */
- (int)numberOfRowsInTableView: (NSTableView *)tableView
{
	return totalItems;
}

- (id)tableView: (NSTableView *)tableView objectValueForTableColumn: (NSTableColumn *)tableColumn row: (int)row
{
	if (row<totalItems) {
		if([[tableColumn identifier] isEqualToString:@"item"])
			return listItem[row];
	}
	return nil; 
}

- (id) window
{
	return SelectListWindow;
}

- (void) reloadData
{
	[listDataSource reloadData];
}

- (void) resetListItems
{
	if (!totalItems || !listItem) return;
	int i=0;
	while (i<totalItems) {
		[listItem[i] release];
		i++;
	}
	free(listItem);
	totalItems=0;
}

- (int) selectList: (int) count withNames: (char**) item status: (BOOL*) stat multiple: (BOOL) multiple title: (NSString*) ttl
{
	NSAutoreleasePool *pool = nil;
	int i=0, k=0;
	title = ttl;
	result = -1;
	
	[listDataSource setAllowsMultipleSelection: multiple];

	if (totalItems) [self resetListItems];
	if (count<1)
		return 0;	
	
	listItem = (NSString**) malloc(sizeof(NSString*) * count);
	while (i<count) {
		listItem[i] =[[NSString alloc] initWithUTF8String: item[i]];
		i++;
	}
	totalItems = count;
	[listDataSource deselectAll:self];
	[listDataSource reloadData]; // make sure we have all data loaded before proceeding with the selection

	pool = [[NSAutoreleasePool alloc] init];	
	
	if (stat)
		for(i=0; i<totalItems; i++){
			if(stat[i]){
				k++;
				[listDataSource selectRowIndexes:[NSIndexSet indexSetWithIndex:i] 
							byExtendingSelection:(k!=1)?YES:NO];
			}
		};
	
	[[self window] setTitle:title];
	running = YES;
	{ /* try to be smart - resize the window such that the all items are visible (with an upper limit) */
		NSRect rw = [[self window] frame];
		NSRect rf = [listDataSource visibleRect];
		NSRect rr = [listDataSource frameOfCellAtColumn:0 row:0];
		NSRect rl = [listDataSource frameOfCellAtColumn:0 row:1];

		float nonTableH = rw.size.height - rf.size.height;
		float showCount = ((float)((count>20)?20:count));
		
		if (count==1) rl.origin.y = rr.origin.y + rr.size.height + 1.0; // rl will be bogus if there is just 1 entry, so we need to fake it
		
		rw.size.height = nonTableH + rr.origin.y + (rl.origin.y-rr.origin.y)*showCount - 1.0;

		[[self window] setFrame:rw display:YES];
	}
	[self show];
	[NSApp runModalForWindow:[self window]];
	
	if (result == 1) {
		NSIndexSet *rows =  [listDataSource selectedRowIndexes];			
		unsigned current_index = [rows firstIndex];
		
		if(current_index == NSNotFound)
			return 0;
		
		if (stat) {
			memset(stat, 0, sizeof(BOOL)*count);
			while (current_index != NSNotFound) {
				stat[current_index] = YES;
				current_index = [rows indexGreaterThanIndex: current_index];
			}
		}
	}
	
	[pool release];
	[self resetListItems];
	
	return result;
}

- (int) count
{
	return totalItems;
}

- (void) show
{
	[listDataSource reloadData];
	[[self window] makeKeyAndOrderFront:self];
}


- (IBAction)returnSelected:(id)sender
{
	result = 1;
	
	[[self window] performClose: sender];

}

- (BOOL)windowShouldClose:(id)sender{
	
	if(running){
		[NSApp stopModal];
		running = NO;
	}
	return YES;	
}

- (IBAction)cancelSelection:(id)sender
{
	result = 0;

	[[self window] performClose: sender];
}

@end