Draws two plots

PlotViewController.m

//
//  NWLocationWeatherViewController.m
//  NextWeather
//
//  Created by rick on 03/04/14.
//  Copyright (c) 2014 KF Interactive. All rights reserved.
//

#import "NWLocationWeatherViewController.h"
#import "NWLocationWeatherViewModel.h"
#import "NWLocation.h"
#import "NWIconController.h"
#import "NWColorController.h"
#import "NWConversionController.h"
#import "NWForecastItem.h"
#import "NWFontController.h"
#import "NGAParallaxMotion.h"

#import <CorePlot/CorePlot-CocoaTouch.h>


@interface NWLocationWeatherViewController () <CPTPlotDataSource>

@property (weak, nonatomic) IBOutlet UILabel *temperatureLabel;

@property (weak, nonatomic) IBOutlet UILabel *weatherIconLabel;

@property (weak, nonatomic) IBOutlet UILabel *locationLabel;

@property (weak, nonatomic) IBOutlet UILabel *weatherDescriptionLabel;

@property (weak, nonatomic) IBOutlet UILabel *dayLightLabel;

@property (nonatomic, strong) NWLocationWeatherViewModel *viewModel;

@property (nonatomic, strong) NSMutableArray *statusCodes;

@property (weak, nonatomic) IBOutlet UIButton *settingsButton;


@property (nonatomic, strong) CPTGraphHostingView *hostView;

@property (nonatomic, strong) CPTScatterPlot *temperaturePlot;

@property (nonatomic) BOOL isInitialized;


@end


@implementation NWLocationWeatherViewController


- (void)viewDidLoad
{
    [super viewDidLoad];

    _valueCount = 3;

    NWIconController *iconController = [NWIconController sharedController];
    NWFontController *fontController = [NWFontController sharedController];

    self.weatherIconLabel.font = [fontController iconFontWithSize:80.0];
    self.weatherIconLabel.textColor = [[NWColorController sharedController] temperatureColor];

    self.temperatureLabel.font = [fontController blackFontWithSize:18];
    self.locationLabel.font = [fontController boldFontWithSize:18.0];
    self.weatherDescriptionLabel.font = [fontController fontWithSize:12.0];
    self.dayLightLabel.font = [fontController fontWithSize:12.0];

    self.settingsButton.titleLabel.font = [fontController iconFontWithSize:80.0];
    [self.settingsButton setTitleColor:[[NWColorController sharedController] temperatureColor] forState:UIControlStateNormal];
    [self.settingsButton setTitle:[iconController characterForSettingsIcon] forState:UIControlStateNormal];

    self.viewModel = [NWLocationWeatherViewModel new];
    RAC(self, temperatureLabel.textColor) = RACObserve(self, viewModel.textColor);
    RAC(self, locationLabel.textColor) = RACObserve(self, viewModel.textColor);
    RAC(self, weatherDescriptionLabel.textColor) = RACObserve(self, viewModel.textColor);
    RAC(self, dayLightLabel.textColor) = RACObserve(self, viewModel.textColor);
    RAC(self, self.view.backgroundColor) = RACObserve(self, viewModel.backgroundColor);
    
    self.statusCodes = [[iconController allStatusCodes] mutableCopy];

    @weakify(self);
    [[RACObserve([NWColorController sharedController], isDark) distinctUntilChanged]
        subscribeNext:^(id x)
        {
            @strongify(self);
            [self resetGraphs];
        }];
}


- (void)redraw
{
    CPTGraph *graph = self.hostView.hostedGraph;
    CPTXYPlotSpace *plotSpace = (CPTXYPlotSpace *) graph.defaultPlotSpace;
    plotSpace.xRange = [CPTPlotRange plotRangeWithLocation:CPTDecimalFromFloat(.0) length:CPTDecimalFromUnsignedInteger([self numberOfItemsToDraw])];

    [self.hostView.hostedGraph reloadData];
    self.isInitialized = YES;
}


- (void)configureHost
{
    NSUInteger topSpacing = 85;
    CGRect frame = CGRectMake(0, topSpacing, CGRectGetWidth(self.view.bounds), CGRectGetHeight(self.view.bounds) - topSpacing);
    self.hostView = [(CPTGraphHostingView *) [CPTGraphHostingView alloc] initWithFrame:frame];
    self.hostView.parallaxIntensity = 10.0;
    [self.view addSubview:self.hostView];
    self.hostView.alpha = 1.0f;
}


- (void)configureGraph
{
    CPTGraph *graph = [[CPTXYGraph alloc] initWithFrame:self.hostView.bounds];
    graph.backgroundColor = [UIColor clearColor].CGColor;
    [graph.plotAreaFrame setPaddingLeft:-.5f];
    [graph.plotAreaFrame setPaddingBottom:.0f];
    [graph.plotAreaFrame setPaddingTop:.0f];
    [graph.plotAreaFrame setPaddingRight:.0f];

    [graph setPaddingLeft:.0f];
    [graph setPaddingBottom:.0f];
    [graph setPaddingTop:.0f];
    [graph setPaddingRight:.0f];

    self.hostView.hostedGraph = graph;
}


- (void)configurePlot
{
    CPTGraph *graph = self.hostView.hostedGraph;
    CPTXYPlotSpace *plotSpace = (CPTXYPlotSpace *) graph.defaultPlotSpace;

    NWConversionController *conversionController = [NWConversionController sharedController];


    CGFloat minTemperatureOrigin = [[self.location.forecastItems valueForKeyPath:@"[email protected]"] floatValue];
    CGFloat minTemperature = [[conversionController convertedTemperature:@(minTemperatureOrigin)] floatValue];
    minTemperature = minTemperature > 0 ? 0 : minTemperature;

    CGFloat maxTemperatureOrigin = [[self.location.forecastItems valueForKeyPath:@"[email protected]"] floatValue];
    CGFloat maxTemperature = [[conversionController convertedTemperature:@(maxTemperatureOrigin)] floatValue];
    CGFloat temperatureRange = fabsf(minTemperature) + fabsf(maxTemperature);

    plotSpace.xRange = [CPTPlotRange plotRangeWithLocation:CPTDecimalFromFloat(.0) length:CPTDecimalFromUnsignedInteger([self numberOfItemsToDraw])];
    plotSpace.yRange = [CPTPlotRange plotRangeWithLocation:CPTDecimalFromFloat(minTemperature) length:CPTDecimalFromFloat(temperatureRange)];

    self.temperaturePlot = [[CPTScatterPlot alloc] init];
    self.temperaturePlot.dataSource = self;
    self.temperaturePlot.identifier = @"Temperature";

    NWColorController *brightnessController = [NWColorController sharedController];
    CPTColor *temperatureColor = [CPTColor colorWithCGColor:brightnessController.temperatureColor.CGColor];

    CPTMutablePlotRange *yRange = (CPTMutablePlotRange *) [plotSpace.yRange mutableCopy];
    [yRange expandRangeByFactor:CPTDecimalFromCGFloat(1.5f)];
    plotSpace.yRange = yRange;

    CPTMutableLineStyle *temperatureLineStyle = (CPTMutableLineStyle *) [self.temperaturePlot.dataLineStyle mutableCopy];
    temperatureLineStyle.lineWidth = 1.5f;
    temperatureLineStyle.lineColor = temperatureColor;
    self.temperaturePlot.dataLineStyle = temperatureLineStyle;
    CPTMutableLineStyle *temperatureSymbolLineStyle = [CPTMutableLineStyle lineStyle];
    temperatureSymbolLineStyle.lineColor = temperatureColor;

    CPTPlotSymbol *temperatureSymbol = [CPTPlotSymbol ellipsePlotSymbol];
    temperatureSymbol.fill = [CPTFill fillWithColor:[CPTColor colorWithCGColor:brightnessController.temperatureColor.CGColor]];
    temperatureSymbol.lineStyle = temperatureSymbolLineStyle;
    temperatureSymbol.size = CGSizeMake(4.5f, 4.5f);
    self.temperaturePlot.plotSymbol = temperatureSymbol;


    CPTBarPlot *barPlot = [CPTBarPlot tubularBarPlotWithColor:[CPTColor colorWithCGColor:brightnessController.rainColor.CGColor] horizontalBars:NO];
    barPlot.baseValue  = CPTDecimalFromString(@"0");
    barPlot.dataSource = self;
    barPlot.barOffset  = CPTDecimalFromFloat(.5f);
    barPlot.identifier = @"Rain";
    barPlot.barCornerRadius = CPTFloat(.5f);
    barPlot.fill = [CPTFill fillWithColor:[CPTColor colorWithCGColor:brightnessController.rainColor.CGColor]];

    CPTMutableLineStyle *barLineStyle = [[CPTMutableLineStyle alloc] init];
    barLineStyle.lineWidth = .0f;
    barPlot.lineStyle = barLineStyle;

    [graph addPlot:barPlot toPlotSpace:plotSpace];
    [graph addPlot:self.temperaturePlot toPlotSpace:plotSpace];
}


- (void)configureAxis
{
    CPTColor *gridAxisColor = [CPTColor colorWithCGColor:self.viewModel.gridAxisColor.CGColor];
    CPTColor *gridMajorColor = [CPTColor colorWithCGColor:self.viewModel.gridMajorColor.CGColor];

    CPTGraph *graph = self.hostView.hostedGraph;
    CPTXYAxisSet *axisSet = (CPTXYAxisSet *)graph.axisSet;

    CPTMutableLineStyle *xAxisGridLineStyle = (CPTMutableLineStyle *) [[CPTLineStyle lineStyle] mutableCopy];
    xAxisGridLineStyle.lineColor = gridAxisColor;
    xAxisGridLineStyle.lineWidth = .5f;

    CPTXYAxis *xAxis = axisSet.xAxis;
    xAxis.majorTickLineStyle = nil;
    xAxis.minorTickLineStyle = nil;
    xAxis.axisLineStyle = xAxisGridLineStyle;
    xAxis.labelFormatter = nil;

    CPTXYAxis *yAxis = axisSet.yAxis;

    CPTMutableLineStyle *yAxisGridLineStyle = (CPTMutableLineStyle *) [[CPTLineStyle lineStyle] mutableCopy];
    yAxisGridLineStyle.lineColor = gridMajorColor;
    yAxisGridLineStyle.lineWidth = .5f;
    yAxis.majorGridLineStyle = yAxisGridLineStyle;
    yAxis.majorIntervalLength = CPTDecimalFromString(@"10.0");
}

#pragma mark - CPTPlotDataSource Methods


- (NSUInteger)numberOfRecordsForPlot:(CPTPlot *)plot
{
    return [self numberOfItemsToDraw];
}


- (NSUInteger)numberOfItemsToDraw
{
    if (UIDeviceOrientationIsLandscape(self.interfaceOrientation))
    {
        return [self.location.forecastItems count];
    }
    else
    {
        return (NSUInteger)self.valueCount;
    }
}


- (NSNumber *)numberForPlot:(CPTPlot *)plot field:(NSUInteger)fieldEnum recordIndex:(NSUInteger)index
{
    NWForecastItem *model = nil;
    if (self.location.forecastItems != nil  && index < [self.location.forecastItems count])
    {
        model = [self.location forecastItemsSortedByDate][index];
    }
    if (model == nil)
    {
        return @0;
    }

    switch (fieldEnum)
    {
        case CPTScatterPlotFieldX:
            if ([plot.identifier isEqual:@"Temperature"])
            {
                return @(index + .5f);
            }
            else
            {
                return @(index);
            }
        case CPTScatterPlotFieldY:
            if ([plot.identifier isEqual:@"Rain"])
            {
                CGFloat value = [model.rainAmount floatValue];
                value = MAX(.25f, value);
                return @(value);
            }
            else
            {
                return [[NWConversionController sharedController] convertedTemperature:model.temperature];
            }
    }
    return @0;
}


- (CPTLayer *)dataLabelForPlot:(CPTPlot *)plot recordIndex:(NSUInteger)index
{
    if ([plot.identifier isEqual:@"Temperature"] && (self.valueCount < 10 || (UIDeviceOrientationIsLandscape(self.interfaceOrientation) && index % 3 == 0)))
    {
        NWForecastItem *model = nil;
        if (self.location.forecastItems != nil  && index < [self.location.forecastItems count])
        {
            model = [self.location forecastItemsSortedByDate][index];
        }

        if (model != nil)
        {
            NSString *currentLabel =  [[NWConversionController sharedController] displayTemperature:model.temperature];
            CPTMutableTextStyle *textStyle = [[CPTMutableTextStyle alloc] init];
            textStyle.color = [CPTColor darkGrayColor];
            textStyle.fontSize  = 9.0f;
            textStyle.fontName = @"HelveticaNeue-CondensedBold";
            CPTLayer *layer = [[CPTLayer alloc] initWithFrame:CGRectMake(.0f, -20.0f, 30.0f, 20.0f)];
            CPTTextLayer *newLayer = [[CPTTextLayer alloc] initWithText:currentLabel style:textStyle];
            [layer addSublayer:newLayer];
            return layer;
        }
    }
    return nil;
}


#pragma mark - Accessors


- (void)setLocation:(NWLocation *)location
{
    _location = location;
    [self update];
    [self resetGraphs];
}


- (void)resetGraphs
{
    [self.hostView removeFromSuperview];
    [self configureHost];
    [self configureGraph];
    [self configurePlot];
    [self configureAxis];
    [self redraw];
}


- (void)setValueCount:(NSInteger)valueCount
{
    if (self.isInitialized && _valueCount != valueCount)
    {
        NSUInteger totalCount = [self.location.forecastItems count];
        _valueCount = MAX(valueCount, MIN(5, totalCount));
        [self redraw];
    }
}



#pragma mark - NWWeatherChildViewControllerDelegate

- (void)update
{
    NWConversionController *conversionController = [NWConversionController sharedController];

    self.temperatureLabel.text = [conversionController displayTemperature:self.location.temperature];
    self.locationLabel.text = self.location.displayName;
    self.weatherIconLabel.text = [[NWIconController sharedController] characterForStatusCode:self.location.weatherCode atDate:[NSDate date]];
    self.weatherDescriptionLabel.text = self.location.weatherDescription;

    self.dayLightLabel.text = [NSString stringWithFormat:NSLocalizedString(@"Sunrise: %@ – Sunset: %@", nil), [conversionController localTimeFromDate:self.location.sunrise], [conversionController localTimeFromDate:self.location.sunset]];
}


@end