components/Chips/examples/ChipsSizingExampleViewController.m

/*
 Copyright 2017-present the Material Components for iOS authors. All Rights Reserved.

 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at

 http://www.apache.org/licenses/LICENSE-2.0

 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
 */

#import "ChipsExamplesSupplemental.h"

#import "MaterialChips.h"
#import "MaterialSlider.h"

@implementation ChipsSizingExampleViewController {
  MDCChipView *_chipView;
  MDCSlider *_widthSlider;
  MDCSlider *_heightSlider;
  UISegmentedControl *_horizontalAlignmentControl;
}

- (void)viewDidLoad {
  [super viewDidLoad];

  self.view.backgroundColor = [UIColor whiteColor];

  _chipView = [[MDCChipView alloc] init];
  _chipView.titleLabel.text = @"Material";
  _chipView.imageView.image = [self faceImage];
  _chipView.accessoryView = [self deleteButton];
  [self.view addSubview:_chipView];

  CGSize chipSize = [_chipView sizeThatFits:self.view.bounds.size];
  _chipView.frame = (CGRect) { CGPointMake(20, 20), chipSize };

  _widthSlider = [[MDCSlider alloc] initWithFrame:CGRectZero];
  _widthSlider.maximumValue = 200;
  _widthSlider.value = _chipView.frame.size.width;
  [_widthSlider addTarget:self
                   action:@selector(widthSliderChanged:)
         forControlEvents:UIControlEventValueChanged];
  [self.view addSubview:_widthSlider];

  _heightSlider = [[MDCSlider alloc] initWithFrame:CGRectZero];
  _heightSlider.maximumValue = 100;
  _heightSlider.value = _chipView.frame.size.height;
  [_heightSlider addTarget:self
                    action:@selector(heightSliderChanged:)
          forControlEvents:UIControlEventValueChanged];
  [self.view addSubview:_heightSlider];

  _horizontalAlignmentControl = [[UISegmentedControl alloc] initWithItems:@[ @"Default", @"Centered" ]];
  _horizontalAlignmentControl.selectedSegmentIndex = 0;
  [_horizontalAlignmentControl addTarget:self
                                  action:@selector(horizontalAlignmentChanged:)
                        forControlEvents:UIControlEventValueChanged];
  [self.view addSubview:_horizontalAlignmentControl];
}

- (void)viewWillLayoutSubviews {
  [super viewWillLayoutSubviews];

  CGSize sliderSize = [_widthSlider sizeThatFits:self.view.bounds.size];
  _widthSlider.frame = CGRectMake(20, 140, self.view.bounds.size.width - 40, sliderSize.height);
  _heightSlider.frame =
      CGRectMake(20, 140 + sliderSize.height + 20, self.view.bounds.size.width - 40, sliderSize.height);
  _horizontalAlignmentControl.frame =
      CGRectMake(20, CGRectGetMaxY(_heightSlider.frame) + 20, self.view.bounds.size.width - 40, _horizontalAlignmentControl.frame.size.height);
}

- (void)widthSliderChanged:(MDCSlider *)slider {
  CGRect frame = _chipView.frame;
  frame.size.width = slider.value;
  _chipView.frame = frame;
  [_chipView layoutIfNeeded];
}

- (void)heightSliderChanged:(MDCSlider *)slider {
  CGRect frame = _chipView.frame;
  frame.size.height = slider.value;
  _chipView.frame = frame;
  [_chipView layoutIfNeeded];
}

- (void)horizontalAlignmentChanged:(UISegmentedControl *)segmentedControl {
  UIControlContentHorizontalAlignment alignment = (segmentedControl.selectedSegmentIndex == 0)
      ? UIControlContentHorizontalAlignmentFill
      : UIControlContentHorizontalAlignmentCenter;
  _chipView.contentHorizontalAlignment = alignment;
  [_chipView layoutIfNeeded];
}

@end