element-ios/Riot/ViewController/LanguagePickerViewController.m

/*
 Copyright 2017 Vector Creations Ltd

 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 "LanguagePickerViewController.h"

#import "AppDelegate.h"

@interface LanguagePickerViewController ()
{
    /**
     Observe kRiotDesignValuesDidChangeThemeNotification to handle user interface theme change.
     */
    id kRiotDesignValuesDidChangeThemeNotificationObserver;
    
    /**
     The fake top view displayed in case of vertical bounce.
     */
    UIView *topview;
}

@end

@implementation LanguagePickerViewController

- (void)finalizeInit
{
    [super finalizeInit];

    // Setup `MXKViewControllerHandling` properties
    self.enableBarTintColorStatusChange = NO;
    self.rageShakeManager = [RageShakeManager sharedManager];
}

- (void)viewDidLoad
{
    [super viewDidLoad];

    // Hide line separators of empty cells
    self.tableView.tableFooterView = [[UIView alloc] init];
    
    // Add a top view which will be displayed in case of vertical bounce.
    CGFloat height = self.tableView.frame.size.height;
    topview = [[UIView alloc] initWithFrame:CGRectMake(0,-height,self.tableView.frame.size.width,height)];
    topview.autoresizingMask = UIViewAutoresizingFlexibleWidth;
    [self.tableView addSubview:topview];
    
    // Observe user interface theme change.
    kRiotDesignValuesDidChangeThemeNotificationObserver = [[NSNotificationCenter defaultCenter] addObserverForName:kRiotDesignValuesDidChangeThemeNotification object:nil queue:[NSOperationQueue mainQueue] usingBlock:^(NSNotification *notif) {
        
        [self userInterfaceThemeDidChange];
        
    }];
    [self userInterfaceThemeDidChange];
}

- (void)userInterfaceThemeDidChange
{
    self.defaultBarTintColor = kRiotSecondaryBgColor;
    self.barTitleColor = kRiotPrimaryTextColor;
    self.activityIndicator.backgroundColor = kRiotOverlayColor;
    
    self.searchBar.barStyle = kRiotDesignSearchBarStyle;
    self.searchBar.tintColor = kRiotDesignSearchBarTintColor;
    
    // Use the primary bg color for the table view in plain style.
    self.tableView.backgroundColor = kRiotPrimaryBgColor;
    topview.backgroundColor = kRiotPrimaryBgColor;
    
    if (self.tableView.dataSource)
    {
        [self.tableView reloadData];
    }
}

- (UIStatusBarStyle)preferredStatusBarStyle
{
    return kRiotDesignStatusBarStyle;
}

- (void)destroy
{
    [super destroy];
    
    [topview removeFromSuperview];
    topview = nil;
    
    if (kRiotDesignValuesDidChangeThemeNotificationObserver)
    {
        [[NSNotificationCenter defaultCenter] removeObserver:kRiotDesignValuesDidChangeThemeNotificationObserver];
        kRiotDesignValuesDidChangeThemeNotificationObserver = nil;
    }
}

- (void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];

    // Screen tracking
    [[AppDelegate theDelegate] trackScreen:@"CountryPicker"];
}

- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath;
{
    cell.textLabel.textColor = kRiotPrimaryTextColor;
    cell.detailTextLabel.textColor = kRiotSecondaryTextColor;
    cell.backgroundColor = kRiotPrimaryBgColor;
    
    // Update the selected background view
    if (kRiotSelectedBgColor)
    {
        cell.selectedBackgroundView = [[UIView alloc] init];
        cell.selectedBackgroundView.backgroundColor = kRiotSelectedBgColor;
    }
    else
    {
        if (tableView.style == UITableViewStylePlain)
        {
            cell.selectedBackgroundView = nil;
        }
        else
        {
            cell.selectedBackgroundView.backgroundColor = nil;
        }
    }
}

@end