react-native-navigation/ios/RCCDrawerController/RCCDrawerHelper.m

//
//  RCCDrawerHelper.m
//  ReactNativeControllers
//
//  Created by Ran Greenberg on 07/04/2016.
//  Copyright © 2016 artal. All rights reserved.
//

#import "RCCDrawerHelper.h"

@implementation RCCDrawerHelper

static CGFloat _sideMenuWidth;

+(UIButton*)createOverlayButton:(id)target {
    UIButton *overlayButton = [[UIButton alloc] init];
    overlayButton.backgroundColor = [UIColor clearColor];
    [overlayButton addTarget:target action:@selector(overlayButtonPressed:) forControlEvents:UIControlEventTouchUpInside];
    
    return overlayButton;
}


+(void)addOverlayButtonToScreen:(UIButton*)buttonToAdd
                    contextView:(UIView*)view
                           side:(RCCDrawerSide)side
                  sideMenuWidth:(CGFloat)sideMenuWidth
              animationDuration:(CGFloat)duration {
    
    _sideMenuWidth = sideMenuWidth;
    
    CGRect buttonFrame = view.bounds;
    
    buttonFrame.origin.x = [RCCDrawerHelper overlayButtonX:sideMenuWidth side:side];
    
    switch (side) {
        case RCCDrawerSideLeft:
        {
            buttonFrame.origin.x = sideMenuWidth;
        }
            
            break;
        case RCCDrawerSideRight:
        {
            buttonFrame.origin.x = 0;
        }
            
            break;
            
        default:
            break;
    }
    
    buttonFrame.size.width = buttonFrame.size.width - sideMenuWidth;
    buttonToAdd.frame = buttonFrame;
    [view addSubview:buttonToAdd];
}

+(void)overlayButtonPressed:(UIButton*)button animationDuration:(CGFloat)duration {
    [button removeFromSuperview];
}


+(CGFloat)overlayButtonX:(CGFloat)sideMenuWidth side:(RCCDrawerSide)side {
    switch (side) {
        case RCCDrawerSideLeft:
        {
            return sideMenuWidth;
        }
            
            break;
        case RCCDrawerSideRight:
        {
            return 0;
        }
            
            break;
            
        default:
            break;
    }
}


+ (UIImage *)imageWithImage:(UIImage *)image scaledToSize:(CGSize)newSize {
    //UIGraphicsBeginImageContext(newSize);
    // In next line, pass 0.0 to use the current device's pixel scaling factor (and thus account for Retina resolution).
    // Pass 1.0 to force exact pixel size.
    UIGraphicsBeginImageContextWithOptions(newSize, NO, 0.0);
    [image drawInRect:CGRectMake(0, 0, newSize.width, newSize.height)];
    UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return newImage;
}

@end