UICombo.m

//
//  UICombo.m
//  UICombo
//
//  Created by Prince Kumar Sharma on 25/03/13.
//  Copyright (c) 2013 Prince Kumar Sharma. All rights reserved.


#import "UICombo.h"

#define karrow @"/MT.bundle/combo_arrow_image.png"
#define kbackground @"/MT.bundle/combo_backgroud.png"
#define kbtnbackground @"MT.bundle/combo_btn_backgroud.png"

@implementation UICombo
@synthesize delegate;

- (id)initWithFrame:(CGRect)frame andItems:(NSArray*)itemArray
{
    if ((self = [super initWithFrame:frame]))
    {
        self->items=[[NSArray alloc]initWithArray:itemArray];
        self->numberOfObjects=[self->items count];

        [self setBackgroundColor:[UIColor lightGrayColor]];
        [self setAutoresizesSubviews:YES];

        [self setFrame:CGRectMake(self.frame.origin.x,self.frame.origin.y,self.frame.size.width,30)];

        self.layer.cornerRadius=5.0;

        _textField=[[UITextField alloc] initWithFrame:CGRectMake(0, 0, self.frame.size.width-23,30)];
        [_textField setBackground:[UIImage imageNamed:kbackground]];
        [_textField setAutoresizingMask:(UIViewAutoresizingFlexibleWidth)];

        _button=[UIButton buttonWithType:UIButtonTypeCustom];
        [_button setFrame:CGRectMake(_textField.frame.size.width, 0, 23, 30)];
        [_button setAutoresizingMask:(UIViewAutoresizingFlexibleLeftMargin)];

        [_button setBackgroundImage:[UIImage imageNamed:kbtnbackground] forState:UIControlStateNormal];
        [_button setImage:[UIImage imageNamed:karrow] forState:UIControlStateNormal];
        [_button addTarget:self action:@selector(open) forControlEvents:UIControlEventTouchUpInside];

        [_textField setBorderStyle:UITextBorderStyleBezel];

        if (self->items.count!=0) {
            [_textField setText:[self->items objectAtIndex:0]];
        }

        [_textField setFont:[UIFont systemFontOfSize:12.0f]];
        [_textField setDelegate:self];

        _tableView=[[UITableView alloc] initWithFrame:CGRectMake(0,_textField.frame.size.height, self.frame.size.width,0)];

        _tableView.autoresizingMask = (UIViewAutoresizingFlexibleHeight|UIViewAutoresizingFlexibleWidth);
        [_tableView setSeparatorStyle:UITableViewCellSeparatorStyleSingleLine];
        [_tableView setBackgroundColor:[UIColor clearColor]];
        [_tableView setRowHeight:25];
        [_tableView setDelegate:self];
        [_tableView setDataSource:self];
        [_tableView.layer setMasksToBounds:YES];
        [_tableView.layer setCornerRadius:2.0];
        [_tableView.layer setBorderColor:[UIColor lightGrayColor].CGColor];
        [_tableView.layer setBorderWidth:1.5f];
        [_tableView.layer setShadowColor:[UIColor blackColor].CGColor];
        [_tableView.layer setShadowOpacity:0.8];
        [_tableView.layer setShadowRadius:3.0];
        [_tableView.layer setShadowOffset:CGSizeMake(2.0, 2.0)];

        [self addSubview:_textField];
        [self addSubview:_tableView];
        [self addSubview:_button];
        [_tableView reloadData];

        self.clipsToBounds=YES;
    }
    return self;
}

-(void)setForeGroundColor:(UIColor*)cColor
{
    [_textField setTextColor:cColor];
}

-(int)selectedIndex
{
    if (![_textField.text isEqualToString:@""]) {
        return [items indexOfObject:_textField.text];
    }
    return 0;
}

-(void)setselectObject:(NSString*)object
{
    if ([self->items indexOfObject:[object stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]]]) {
        _textField.text=object;
    }else{
        NSLog(@"Object NOT found");
    }
}

-(void)setSelected:(int)index
{
    _textField.text=[items objectAtIndex:index];
}

-(NSString*)getSeletedItem
{
    return _textField.text;
}

-(void)addItem:(NSString*)item
{
    NSMutableArray *tempArray=[[NSMutableArray alloc] initWithArray:self->items];
    [tempArray addObject:item];
    self->items=[NSArray arrayWithArray:tempArray];
    self->numberOfObjects=[self->items count];
}

-(void)insertItem:(NSString*)item AtIndex:(int)index
{
    NSMutableArray *tempArray=[[NSMutableArray alloc] initWithArray:self->items];
    [tempArray insertObject:item atIndex:index];
    self->items=[NSArray arrayWithArray:tempArray];
    self->numberOfObjects=[self->items count];
}

-(void)setItems:(NSArray*)items_array
{
    self->items=[[NSArray alloc]initWithArray:items_array];
    self->numberOfObjects=[self->items count];
    if (self->items.count!=0) {
        [_textField setText:[self->items objectAtIndex:0]];
    }
    [self refresh];
}

-(int)removeItem
{
    NSMutableArray *tempArray=[[NSMutableArray alloc] initWithArray:self->items];
    [tempArray removeLastObject];
    self->items=[NSArray arrayWithArray:tempArray];
    self->numberOfObjects=[self->items count];
    return self->numberOfObjects;
}

-(void)removeItemAtIndex:(NSUInteger)index
{
    NSMutableArray *tempArray=[[NSMutableArray alloc] initWithArray:self->items];
    [tempArray removeObjectAtIndex:index];
    self->items=[NSArray arrayWithArray:tempArray];
    self->numberOfObjects=[self->items count];
}

-(void)refresh
{
    [_tableView reloadData];
    [self setNeedsDisplay];
}

// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect
{
    [_tableView setNeedsDisplay];
    [_textField setNeedsDisplay];
}


#pragma mark- Combo Animation

-(void)open
{
    [self.superview bringSubviewToFront:self];
    if (numberOfObjects!=0) {
        __block CGRect rect=self.frame;
        rect.size.height=150;
        [UIView animateWithDuration:0.3 delay:0 options:UIViewAnimationOptionCurveLinear animations:^{
            [self setFrame:rect];
        } completion:^(BOOL finished){
            [self setNeedsDisplay];
            [_tableView reloadData];
        }];
    }
}

-(void)close
{
    __block CGRect rect=self.frame;
    rect.size.height=_textField.frame.size.height;
    [UIView animateWithDuration:0.3 delay:0 options:UIViewAnimationOptionCurveLinear animations:^{
        [self setFrame:rect];
    } completion:^(BOOL finished) {
        [self setNeedsDisplay];
    }];
}


#pragma mark- UITableView datasource methods

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return [self->items count];
}


- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *cellIdentifier=@"cellIdentifier";
    UITableViewCell *cell=[tableView dequeueReusableCellWithIdentifier:cellIdentifier];
    if (cell==nil) {
        cell=[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier];
    }
    cell.textLabel.font=[UIFont systemFontOfSize:14.0f];
    cell.textLabel.text=[self->items objectAtIndex:indexPath.row];
    CGRect cellFrame=cell.frame;
    cellFrame.size.height=25;
    [cell setFrame:cellFrame];

    return cell;
}

- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath
{
    UIView *bgView=[[UIView alloc] initWithFrame:cell.frame];
    [bgView setBackgroundColor:[UIColor whiteColor]];

//    CAGradientLayer *gradient = [CAGradientLayer layer];
//    gradient.frame = bgView.bounds;
//    gradient.colors = [NSArray arrayWithObjects:(id)[[UIColor lightGrayColor] CGColor], (id)[[UIColor whiteColor] CGColor], nil];
//    [bgView.layer insertSublayer:gradient atIndex:0];
    [cell setBackgroundView:bgView];
}

#pragma mark- UITableView delegate methods

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    _textField.text=[self->items objectAtIndex:indexPath.row];
    [self.delegate comboView:self didSelectItemAtIndex:indexPath.row];
    [tableView deselectRowAtIndexPath:[tableView indexPathForSelectedRow] animated:YES];
    [self close];
}

- (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate
{
    [self bringSubviewToFront:_textField];
}

#pragma mark- UITextField delegate method

- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField
{
    return NO;
}

- (void)dealloc
{
    _tableView.delegate=nil;
    _tableView.dataSource=nil;
    [_tableView removeFromSuperview];
    _tableView=nil;
    [_textField removeFromSuperview];
    _textField=nil;
}

@end