Merge MatrixKit develop with commit hash: b85b736313bec0592bd1cabc68035d97f5331137

Riot/Modules/MatrixKit/Controllers/MXKActivityHandlingViewController.m

@@ -0,0 +1,83 @@
+// 
+// Copyright 2020 The Matrix.org Foundation C.I.C
+//
+// 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 "MXKActivityHandlingViewController.h"
+
+@interface MXKActivityHandlingViewController ()
+
+@end
+
+@implementation MXKActivityHandlingViewController
+@synthesize activityIndicator;
+
+#pragma mark -
+
+- (void)viewDidLoad
+{
+    [super viewDidLoad];
+    
+    // Add default activity indicator
+    activityIndicator = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhite];
+    activityIndicator.backgroundColor = [UIColor colorWithRed:0.8 green:0.8 blue:0.8 alpha:1.0];
+    activityIndicator.autoresizingMask = UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleBottomMargin | UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin;
+    activityIndicator.hidesWhenStopped = YES;
+    
+    CGRect frame = activityIndicator.frame;
+    frame.size.width += 30;
+    frame.size.height += 30;
+    activityIndicator.bounds = frame;
+    [activityIndicator.layer setCornerRadius:5];
+    
+    activityIndicator.center = self.view.center;
+    [self.view addSubview:activityIndicator];
+}
+
+- (void)dealloc
+{
+    if (activityIndicator)
+    {
+        [activityIndicator removeFromSuperview];
+        activityIndicator = nil;
+    }
+}
+
+#pragma mark - Activity indicator
+
+- (void)startActivityIndicator
+{
+    if (activityIndicator)
+    {
+        [self.view bringSubviewToFront:activityIndicator];
+        [activityIndicator startAnimating];
+        
+        // Show the loading wheel after a delay so that if the caller calls stopActivityIndicator
+        // in a short future, the loading wheel will not be displayed to the end user.
+        activityIndicator.alpha = 0;
+        [UIView animateWithDuration:0.3 delay:0.3 options:UIViewAnimationOptionBeginFromCurrentState animations:^{
+            self->activityIndicator.alpha = 1;
+        } completion:^(BOOL finished)
+         {
+         }];
+    }
+}
+
+- (void)stopActivityIndicator
+{
+    [activityIndicator stopAnimating];
+}
+
+
+@end