The R Project SVN R-packages

/*

 *  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