[ios] iPhone landscape placepage

1 files changed, 84 insertions, 0 deletions

diff --git a/iphone/Maps/Classes/MWMSpringAnimation.mm b/iphone/Maps/Classes/MWMSpringAnimation.mm
new file mode 100644
index 0000000000..62270a9848
--- /dev/null
+++ b/iphone/Maps/Classes/MWMSpringAnimation.mm
@@ -0,0 +1,84 @@
+//
+//  MWMSpringAnimation.m
+//  Maps
+//
+//  Created by v.mikhaylenko on 21.04.15.
+//  Copyright (c) 2015 MapsWithMe. All rights reserved.
+//
+
+#import "MWMSpringAnimation.h"
+
+static inline CGPoint CGPointSubtract(CGPoint p1, CGPoint p2)
+{
+  return CGPointMake(p1.x - p2.x, p1.y - p2.y);
+}
+
+static inline CGPoint CGPointAdd(CGPoint p1, CGPoint p2)
+{
+  return CGPointMake(p1.x + p2.x, p1.y + p2.y);
+}
+
+static inline CGPoint CGPointMultiply(CGPoint point, CGFloat multiplier)
+{
+  return CGPointMake(point.x * multiplier, point.y * multiplier);
+}
+
+static inline CGFloat CGPointLength(CGPoint point)
+{
+  return (CGFloat)sqrt(point.x * point.x + point.y * point.y);
+}
+
+@interface MWMSpringAnimation ()
+
+@property (nonatomic) CGPoint velocity;
+@property (nonatomic) CGPoint targetPoint;
+@property (nonatomic) UIView *view;
+
+@end
+
+@implementation MWMSpringAnimation
+
++ (instancetype)animationWithView:(UIView *)view target:(CGPoint)target velocity:(CGPoint)velocity
+{
+  return [[self alloc] initWithView:view target:target velocity:velocity];
+}
+
+- (instancetype)initWithView:(UIView *)view target:(CGPoint)target velocity:(CGPoint)velocity
+{
+  self = [super init];
+  if (self)
+  {
+    self.view = view;
+    self.targetPoint = target;
+    self.velocity = velocity;
+  }
+  return self;
+}
+
+- (void)animationTick:(CFTimeInterval)dt finished:(BOOL *)finished
+{
+  static CGFloat const frictionConstant = 25.;
+  static CGFloat const springConstant = 300.;
+  CGFloat const time = (CGFloat) dt;
+
+  // friction force = velocity * friction constant
+  CGPoint const frictionForce = CGPointMultiply(self.velocity, frictionConstant);
+  // spring force = (target point - current position) * spring constant
+  CGPoint const springForce = CGPointMultiply(CGPointSubtract(self.targetPoint, self.view.center), springConstant);
+  // force = spring force - friction force
+  CGPoint const force = CGPointSubtract(springForce, frictionForce);
+  // velocity = current velocity + force * time / mass
+  self.velocity = CGPointAdd(self.velocity, CGPointMultiply(force, time));
+  // position = current position + velocity * time
+  self.view.center = CGPointAdd(self.view.center, CGPointMultiply(self.velocity, time));
+
+  CGFloat const speed = CGPointLength(self.velocity);
+  CGFloat const distanceToGoal = CGPointLength(CGPointSubtract(self.targetPoint, self.view.center));
+  if (speed < 0.05 && distanceToGoal < 1)
+  {
+    self.view.center = self.targetPoint;
+    *finished = YES;
+  }
+}
+
+@end