kmpdfkit_demo/PDFViewer/Source/PDFShape/PDFShapeViewController.m

//
//  PDFShapeViewController.m
//  PDFReader
//
//  Copyright © 2014-2022 PDF Technologies, Inc. All Rights Reserved.
//
//  The PDF Reader Sample applications are licensed with a modified BSD license.
//  Please see License for details. This notice may not be removed from this file.
//

#import "PDFShapeViewController.h"
#import "ColorView.h"

@interface PDFShapeViewController () <UIPopoverPresentationControllerDelegate>

@property (nonatomic,assign) IBOutlet UIView *contentView;
@property (nonatomic,assign) IBOutlet ColorView *colorView;
@property (nonatomic,assign) IBOutlet UISegmentedControl *segmentedControl;
@property (nonatomic,assign) IBOutlet UISlider *opacitySlider;
@property (nonatomic,assign) IBOutlet UISlider *thicknessSlider;
@property (nonatomic,assign) IBOutlet UILabel *opacityMinLabel;

@property (nonatomic,assign) IBOutlet UIButton *style1Button;
@property (nonatomic,assign) IBOutlet UIButton *style2Button;
@property (nonatomic,assign) IBOutlet UIButton *style3Button;
@property (nonatomic,assign) IBOutlet UIButton *style4Button;

@property (nonatomic,retain) UIView *styleSelectedView;

@end

@implementation PDFShapeViewController

#pragma mark Init Methods

- (void)dealloc {
    Block_release(_callback);
    [_styleSelectedView release];
    [_color release];
    [_fillColor release];
    [super dealloc];
}

#pragma mark View Methods

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib.
    _styleSelectedView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 10, 10)];
    _styleSelectedView.backgroundColor = [UIColor lightGrayColor];
    _styleSelectedView.layer.masksToBounds = YES;
    _styleSelectedView.layer.cornerRadius = 5;
    [self.view addSubview:_styleSelectedView];

    __block __typeof(self) blockSelf = self;
    self.colorView.callback = ^(UIColor *color) {
        if (blockSelf.segmentedControl.selectedSegmentIndex == 0) {
            blockSelf.color = color;
        } else {
            blockSelf.fillColor = color;
        }
        if (blockSelf.callback) {
            blockSelf.callback();
        }
    };
    self.colorView.allowsClearColor = YES;
    self.thicknessSlider.value = self.borderWidth;
    
    [self updateSelectedView];
}

- (void)viewWillLayoutSubviews {
    [super viewWillLayoutSubviews];
    if (self.allowsShowStyle) {
        self.preferredContentSize = CGSizeMake(300, self.contentView.bounds.size.height);
    } else {
        self.preferredContentSize = CGSizeMake(300, self.contentView.bounds.size.height-78);
    }
    
    UIButton *button = nil;
    if (self.style == 0) {
        button = self.style1Button;
    } else if (self.style == 1) {
        button = self.style2Button;
    } else if (self.style == 2) {
        button = self.style3Button;
    } else if (self.style == 3) {
        button = self.style4Button;
    }
    self.styleSelectedView.center = CGPointMake(button.center.x, button.frame.origin.y-self.styleSelectedView.bounds.size.height/2.0);
}

- (void)updateSelectedView {
    if (self.segmentedControl.selectedSegmentIndex == 0) {
        self.colorView.color = self.color;
    } else {
        self.colorView.color = self.fillColor;
    }
    if (self.segmentedControl.selectedSegmentIndex == 0) {
        self.opacitySlider.minimumValue = 25;
        self.opacitySlider.maximumValue = 100;
        self.opacitySlider.value = self.opacity;
        self.opacityMinLabel.text = @"25%";
    } else {
        self.opacitySlider.minimumValue = 0;
        self.opacitySlider.maximumValue = 100;
        self.opacitySlider.value = self.fillOpacity;
        self.opacityMinLabel.text = @"0%";
    }
}

#pragma mark - Button Actions

- (IBAction)segmentedControlValueChanged_Mode:(id)sender {
    [self updateSelectedView];
}

- (IBAction)buttonItemClicked_Style:(UIButton *)button {
    self.style = button.tag;
    self.styleSelectedView.center = CGPointMake(button.center.x, button.frame.origin.y-self.styleSelectedView.bounds.size.height/2.0);
    if (self.callback) {
        self.callback();
    }
}

- (IBAction)sliderValueChanged_Opacity:(UISlider *)slider {
    if (self.segmentedControl.selectedSegmentIndex == 0) {
        self.opacity = slider.value;
    } else {
        self.fillOpacity = slider.value;
    }
    if (self.callback) {
        self.callback();
    }
}

- (IBAction)sliderValueChanged_BorderWidth:(UISlider *)slider {
    self.borderWidth = slider.value;
    if (self.callback) {
        self.callback();
    }
}

#pragma mark - Public Methods

- (void)showViewController:(UIViewController *)viewController inRect:(CGRect)rect {
    self.modalPresentationStyle = UIModalPresentationPopover;
    UIPopoverPresentationController *popVC = self.popoverPresentationController;
    popVC.delegate = self;
    popVC.sourceRect = rect;
    popVC.sourceView = viewController.view;
    [viewController presentViewController:self animated:YES completion:nil];
}

#pragma mark - UIPopoverPresentationControllerDelegate

- (UIModalPresentationStyle)adaptivePresentationStyleForPresentationController:(UIPresentationController *)controller traitCollection:(UITraitCollection *)traitCollection {
    return UIModalPresentationNone;
}

@end