mirror of
https://github.com/vector-im/element-ios.git
synced 2024-09-30 08:12:40 +00:00
484 lines
21 KiB
Objective-C
484 lines
21 KiB
Objective-C
/*
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Copyright 2015 OpenMarket Ltd
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#import "SegmentedViewController.h"
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#import "VectorDesignValues.h"
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@interface SegmentedViewController ()
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{
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// list of displayed UIViewControllers
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NSArray* viewControllers;
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// displayed viewController
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NSLayoutConstraint *displayedVCTopConstraint;
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NSLayoutConstraint *displayedVCLeftConstraint;
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NSLayoutConstraint *displayedVCWidthConstraint;
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NSLayoutConstraint *displayedVCHeightConstraint;
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// list of NSString
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NSArray* sectionTitles;
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// list of section labels
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NSArray* sectionLabels;
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// the selected marker view
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UIView* selectedMarkerView;
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NSLayoutConstraint *leftMarkerViewConstraint;
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}
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@end
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@implementation SegmentedViewController
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#pragma mark - Class methods
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+ (UINib *)nib
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{
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return [UINib nibWithNibName:NSStringFromClass([SegmentedViewController class])
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bundle:[NSBundle bundleForClass:[SegmentedViewController class]]];
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}
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+ (instancetype)segmentedViewController
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{
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return [[[self class] alloc] initWithNibName:NSStringFromClass([SegmentedViewController class])
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bundle:[NSBundle bundleForClass:[SegmentedViewController class]]];
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}
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/**
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init the segmentedViewController with a list of UIViewControllers.
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@param titles the section tiles
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@param viewControllers the list of viewControllers to display.
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@param defaultSelected index of the default selected UIViewController in the list.
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*/
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- (void)initWithTitles:(NSArray*)titles viewControllers:(NSArray*)someViewControllers defaultSelected:(NSUInteger)index
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{
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viewControllers = someViewControllers;
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sectionTitles = titles;
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_selectedIndex = index;
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}
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- (void)setSelectedIndex:(NSUInteger)selectedIndex
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{
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if (_selectedIndex != selectedIndex)
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{
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_selectedIndex = selectedIndex;
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[self displaySelectedViewController];
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}
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}
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#pragma mark -
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- (void)addConstraint:(UIView*)view constraint:(NSLayoutConstraint*)aConstraint
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{
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// sanity check
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if (view && aConstraint)
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{
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if ([NSLayoutConstraint respondsToSelector:@selector(activateConstraints:)])
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{
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[NSLayoutConstraint activateConstraints:@[aConstraint]];
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}
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else
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{
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[view addConstraint:aConstraint];
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}
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}
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}
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- (void)removeConstraint:(UIView*)view constraint:(NSLayoutConstraint*)aConstraint
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{
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// sanity check
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if (view && aConstraint)
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{
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if ([NSLayoutConstraint respondsToSelector:@selector(deactivateConstraints:)])
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{
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[NSLayoutConstraint deactivateConstraints:@[aConstraint]];
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}
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else
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{
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[view removeConstraint:aConstraint];
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}
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}
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}
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- (void)viewDidLoad
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{
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[super viewDidLoad];
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// Check whether the view controller has been pushed via storyboard
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if (!self.viewControllerContainer)
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{
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// Instantiate view controller objects
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[[[self class] nib] instantiateWithOwner:self options:nil];
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}
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// Adjust Top
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[self removeConstraint:self.view constraint:self.selectionContainerTopConstraint];
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// it is not possible to define a constraint to the topLayoutGuide in the xib editor
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// so do it in the code ..
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self.selectionContainerTopConstraint = [NSLayoutConstraint constraintWithItem:self.topLayoutGuide
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attribute:NSLayoutAttributeBottom
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relatedBy:NSLayoutRelationEqual
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toItem:self.selectionContainer
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attribute:NSLayoutAttributeTop
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multiplier:1.0f
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constant:0.0f];
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[self addConstraint:self.selectionContainer constraint:self.selectionContainerTopConstraint];
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[self createSegmentedViews];
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}
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- (void)viewWillAppear:(BOOL)animated
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{
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[super viewWillAppear:animated];
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if (_selectedViewController)
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{
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// Make iOS invoke child viewWillAppear and viewDidAppear
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[_selectedViewController beginAppearanceTransition:YES animated:animated];
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[_selectedViewController endAppearanceTransition];
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}
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}
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- (void)createSegmentedViews
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{
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NSMutableArray* labels = [[NSMutableArray alloc] init];
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NSUInteger count = viewControllers.count;
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for(NSUInteger index = 0; index < count; index++)
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{
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// create programmatically each label
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UILabel *label = [[UILabel alloc] init];
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label.text = [sectionTitles objectAtIndex:index];
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label.font = [UIFont systemFontOfSize:17];
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label.textAlignment = NSTextAlignmentCenter;
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label.textColor = VECTOR_GREEN_COLOR;
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label.backgroundColor = [UIColor clearColor];
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// the constraint defines the label frame
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// so ignore any autolayout stuff
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[label setTranslatesAutoresizingMaskIntoConstraints:NO];
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// add the label before setting the constraints
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[self.selectionContainer addSubview:label];
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NSLayoutConstraint *leftConstraint;
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if (labels.count)
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{
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leftConstraint = [NSLayoutConstraint constraintWithItem:label
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attribute:NSLayoutAttributeLeading
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relatedBy:NSLayoutRelationEqual
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toItem:[labels objectAtIndex:(index-1)]
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attribute:NSLayoutAttributeTrailing
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multiplier:1.0
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constant:0];
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}
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else
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{
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leftConstraint = [NSLayoutConstraint constraintWithItem:label
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attribute:NSLayoutAttributeLeading
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relatedBy:NSLayoutRelationEqual
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toItem:self.selectionContainer
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attribute:NSLayoutAttributeLeading
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multiplier:1.0
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constant:0];
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}
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NSLayoutConstraint *rightConstraint = [NSLayoutConstraint constraintWithItem:label
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attribute:NSLayoutAttributeWidth
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relatedBy:NSLayoutRelationEqual
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toItem:self.selectionContainer
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attribute:NSLayoutAttributeWidth
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multiplier:1.0 / count
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constant:0];
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NSLayoutConstraint *topConstraint = [NSLayoutConstraint constraintWithItem:label
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attribute:NSLayoutAttributeTop
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relatedBy:NSLayoutRelationEqual
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toItem:self.selectionContainer
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attribute:NSLayoutAttributeTop
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multiplier:1.0
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constant:0];
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NSLayoutConstraint *heightConstraint = [NSLayoutConstraint constraintWithItem:label
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attribute:NSLayoutAttributeHeight
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relatedBy:NSLayoutRelationEqual
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toItem:self.selectionContainer
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attribute:NSLayoutAttributeHeight
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multiplier:1.0
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constant:0];
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// set the constraints
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if ([NSLayoutConstraint respondsToSelector:@selector(activateConstraints:)])
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{
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[NSLayoutConstraint activateConstraints:@[leftConstraint, rightConstraint, topConstraint, heightConstraint]];
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}
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else
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{
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[self.selectionContainer addConstraint:leftConstraint];
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[self.selectionContainer addConstraint:rightConstraint];
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[self.selectionContainer addConstraint:topConstraint];
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[label addConstraint:heightConstraint];
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}
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UITapGestureRecognizer *labelTapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(onLabelTouch:)];
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[labelTapGesture setNumberOfTouchesRequired:1];
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[labelTapGesture setNumberOfTapsRequired:1];
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label.userInteractionEnabled = YES;
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[label addGestureRecognizer:labelTapGesture];
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[labels addObject:label];
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}
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sectionLabels = labels;
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[self addSelectedMarkerView];
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[self displaySelectedViewController];
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}
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- (void)addSelectedMarkerView
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{
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// create the selected marker view
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selectedMarkerView = [[UIView alloc] init];
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selectedMarkerView.backgroundColor = VECTOR_GREEN_COLOR;
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[selectedMarkerView setTranslatesAutoresizingMaskIntoConstraints:NO];
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[self.selectionContainer addSubview:selectedMarkerView];
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leftMarkerViewConstraint = [NSLayoutConstraint constraintWithItem:selectedMarkerView
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attribute:NSLayoutAttributeLeading
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relatedBy:NSLayoutRelationEqual
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toItem:[sectionLabels objectAtIndex:_selectedIndex]
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attribute:NSLayoutAttributeLeading
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multiplier:1.0
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constant:0];
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NSLayoutConstraint *widthConstraint = [NSLayoutConstraint constraintWithItem:selectedMarkerView
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attribute:NSLayoutAttributeWidth
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relatedBy:NSLayoutRelationEqual
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toItem:self.selectionContainer
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attribute:NSLayoutAttributeWidth
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multiplier:1.0 / sectionLabels.count
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constant:0];
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NSLayoutConstraint *bottomConstraint = [NSLayoutConstraint constraintWithItem:selectedMarkerView
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attribute:NSLayoutAttributeBottom
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relatedBy:NSLayoutRelationEqual
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toItem:self.selectionContainer
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attribute:NSLayoutAttributeBottom
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multiplier:1.0
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constant:0];
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NSLayoutConstraint *heightConstraint = [NSLayoutConstraint constraintWithItem:selectedMarkerView
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attribute:NSLayoutAttributeHeight
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relatedBy:NSLayoutRelationEqual
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toItem:nil
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attribute:NSLayoutAttributeNotAnAttribute
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multiplier:1.0
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constant:3];
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// set the constraints
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if ([NSLayoutConstraint respondsToSelector:@selector(activateConstraints:)])
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{
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[NSLayoutConstraint activateConstraints:@[leftMarkerViewConstraint, widthConstraint, bottomConstraint, heightConstraint]];
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}
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else
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{
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[self.selectionContainer addConstraint:leftMarkerViewConstraint];
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[self.selectionContainer addConstraint:bottomConstraint];
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[selectedMarkerView addConstraint:heightConstraint];
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[selectedMarkerView addConstraint:heightConstraint];
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}
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}
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- (void)displaySelectedViewController
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{
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if (_selectedViewController)
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{
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NSUInteger index = [viewControllers indexOfObject:_selectedViewController];
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if (index != NSNotFound)
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{
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UILabel* label = [sectionLabels objectAtIndex:index];
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label.font = [UIFont systemFontOfSize:17];
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}
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[_selectedViewController.view removeFromSuperview];
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[_selectedViewController removeFromParentViewController];
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[self removeConstraint:_selectedViewController.view constraint:displayedVCWidthConstraint];
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[self removeConstraint:_selectedViewController.view constraint:displayedVCHeightConstraint];
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[self removeConstraint:self.viewControllerContainer constraint:displayedVCTopConstraint];
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[self removeConstraint:self.viewControllerContainer constraint:displayedVCLeftConstraint];
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}
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UILabel* label = [sectionLabels objectAtIndex:_selectedIndex];
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label.font = [UIFont boldSystemFontOfSize:17];
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// update the marker view position
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[self removeConstraint:selectedMarkerView constraint:leftMarkerViewConstraint];
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leftMarkerViewConstraint = [NSLayoutConstraint constraintWithItem:selectedMarkerView
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attribute:NSLayoutAttributeLeading
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relatedBy:NSLayoutRelationEqual
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toItem:[sectionLabels objectAtIndex:_selectedIndex]
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attribute:NSLayoutAttributeLeading
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multiplier:1.0
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constant:0];
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[self addConstraint:selectedMarkerView constraint:leftMarkerViewConstraint];
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// Set the new selected view controller
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_selectedViewController = [viewControllers objectAtIndex:_selectedIndex];
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// Make iOS invoke child viewWillAppear
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[_selectedViewController beginAppearanceTransition:YES animated:YES];
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[self addChildViewController:_selectedViewController];
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[_selectedViewController.view setTranslatesAutoresizingMaskIntoConstraints:NO];
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[self.viewControllerContainer addSubview:_selectedViewController.view];
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displayedVCTopConstraint = [NSLayoutConstraint constraintWithItem:_selectedViewController.view
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attribute:NSLayoutAttributeTop
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relatedBy:NSLayoutRelationEqual
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toItem:self.viewControllerContainer
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attribute:NSLayoutAttributeTop
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multiplier:1.0f
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constant:0.0f];
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[self addConstraint:self.viewControllerContainer constraint:displayedVCTopConstraint];
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displayedVCLeftConstraint = [NSLayoutConstraint constraintWithItem:_selectedViewController.view
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attribute:NSLayoutAttributeLeading
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relatedBy:NSLayoutRelationEqual
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toItem:self.viewControllerContainer
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attribute:NSLayoutAttributeLeading
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multiplier:1.0f
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constant:0.0f];
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[self addConstraint:self.viewControllerContainer constraint:displayedVCLeftConstraint];
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displayedVCWidthConstraint = [NSLayoutConstraint constraintWithItem:_selectedViewController.view
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attribute:NSLayoutAttributeWidth
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relatedBy:NSLayoutRelationEqual
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toItem:self.viewControllerContainer
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attribute:NSLayoutAttributeWidth
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multiplier:1.0
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constant:0];
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[self addConstraint:_selectedViewController.view constraint:displayedVCWidthConstraint];
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displayedVCHeightConstraint = [NSLayoutConstraint constraintWithItem:_selectedViewController.view
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attribute:NSLayoutAttributeHeight
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relatedBy:NSLayoutRelationEqual
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toItem:self.viewControllerContainer
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attribute:NSLayoutAttributeHeight
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multiplier:1.0
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constant:0];
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[self addConstraint:_selectedViewController.view constraint:displayedVCHeightConstraint];
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[_selectedViewController didMoveToParentViewController:self];
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[_selectedViewController endAppearanceTransition];
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// refresh the navbar background color
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// to display if the homeserver is reachable.
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[self onMatrixSessionChange];
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}
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#pragma mark - Search
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- (void)showSearch:(BOOL)animated
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{
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[super showSearch:animated];
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// Show the tabs header
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if (animated)
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{
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[UIView animateWithDuration:.3 delay:0 options:UIViewAnimationOptionBeginFromCurrentState | UIViewAnimationOptionCurveEaseIn
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animations:^{
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self.selectionContainerHeightConstraint.constant = 44;
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[self.view layoutIfNeeded];
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}
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completion:^(BOOL finished){
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}];
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}
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else
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{
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self.selectionContainerHeightConstraint.constant = 44;
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[self.view layoutIfNeeded];
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}
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}
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- (void)hideSearch:(BOOL)animated
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{
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[super hideSearch:animated];
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// Hide the tabs header
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if (animated)
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{
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[UIView animateWithDuration:.3 delay:0 options:UIViewAnimationOptionBeginFromCurrentState | UIViewAnimationOptionCurveEaseIn
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animations:^{
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self.selectionContainerHeightConstraint.constant = 0;
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[self.view layoutIfNeeded];
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}
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completion:^(BOOL finished) {
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// Go back to the main tab
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// Do it at the end of the animation when the tabs header of the SegmentedVC is hidden
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// so that the user cannot see the selection bar of this header moving
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self.selectedIndex = 0;
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self.selectedViewController.view.hidden = NO;
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}];
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}
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else
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{
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self.selectionContainerHeightConstraint.constant = 0;
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[self.view layoutIfNeeded];
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// Go back to the recents tab
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self.selectedIndex = 0;
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self.selectedViewController.view.hidden = NO;
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}
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}
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#pragma mark - touch event
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- (void)onLabelTouch:(UIGestureRecognizer*)gestureRecognizer
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{
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NSUInteger pos = [sectionLabels indexOfObject:gestureRecognizer.view];
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// check if there is an update before triggering anything
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if ((pos != NSNotFound) && (_selectedIndex != pos))
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{
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// update the selected index
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self.selectedIndex = pos;
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[self displaySelectedViewController];
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}
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}
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@end
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