Repo created

iphone/Maps/Classes/CustomViews/MapViewControls/SideButtons/ZoomButtons/MWMZoomButtonsView.mm

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+#import "Common.h"
+#import "MWMZoomButtonsView.h"
+#import "MWMMapViewControlsCommon.h"
+
+static CGFloat const kZoomViewOffsetToTopBound = 12.0;
+static CGFloat const kZoomViewOffsetToBottomBound = 40.0;
+static CGFloat const kZoomViewOffsetToFrameBound = 294.0;
+static CGFloat const kZoomViewHideBoundPercent = 0.4;
+
+@interface MWMZoomButtonsView()
+
+@property (nonatomic) CGRect defaultBounds;
+
+@end
+
+@implementation MWMZoomButtonsView
+
+- (void)awakeFromNib
+{
+  self.defaultBounds = self.bounds;
+  self.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
+}
+
+- (void)layoutSubviews
+{
+  self.bounds = self.defaultBounds;
+  [self layoutXPosition:self.hidden];
+  [self layoutYPosition];
+  [super layoutSubviews];
+}
+
+- (void)layoutXPosition:(BOOL)hidden
+{
+  if (hidden)
+    self.minX = self.superview.width;
+  else
+    self.maxX = self.superview.width - kViewControlsOffsetToBounds;
+}
+
+- (void)layoutYPosition
+{
+  CGFloat const maxY = MIN(self.superview.height - kZoomViewOffsetToFrameBound, self.bottomBound - kZoomViewOffsetToBottomBound);
+  self.minY = MAX(maxY - self.height, self.topBound + kZoomViewOffsetToTopBound);
+}
+
+- (void)moveAnimated
+{
+  if (self.hidden)
+    return;
+  [UIView animateWithDuration:framesDuration(kMenuViewMoveFramesCount) animations:^{ [self layoutYPosition]; }];
+}
+
+- (void)fadeAnimatedIn:(BOOL)show
+{
+  [UIView animateWithDuration:framesDuration(kMenuViewHideFramesCount) animations:^{ self.alpha = show ? 1.0 : 0.0; }];
+}
+
+- (void)animate
+{
+  CGFloat const hideBound = kZoomViewHideBoundPercent * self.superview.height;
+  BOOL const isHidden = self.alpha == 0.0;
+  BOOL const willHide = (self.bottomBound < hideBound) || (self.defaultBounds.size.height > self.bottomBound - self.topBound);
+  if (willHide)
+  {
+    if (!isHidden)
+      [self fadeAnimatedIn:NO];
+  }
+  else
+  {
+    [self moveAnimated];
+    if (isHidden)
+      [self fadeAnimatedIn:YES];
+  }
+}
+
+#pragma mark - Properties
+
+- (void)setHidden:(BOOL)hidden animated:(BOOL)animated
+{
+  if (animated)
+  {
+    if (self.hidden == hidden)
+      return;
+    if (!hidden)
+      self.hidden = NO;
+    [self layoutXPosition:!hidden];
+    [UIView animateWithDuration:framesDuration(kMenuViewHideFramesCount) animations:^
+    {
+      [self layoutXPosition:hidden];
+    }
+    completion:^(BOOL finished)
+    {
+      if (hidden)
+        self.hidden = YES;
+    }];
+  }
+  else
+  {
+    self.hidden = hidden;
+  }
+}
+
+@synthesize topBound = _topBound;
+
+- (void)setTopBound:(CGFloat)topBound
+{
+  if (equalScreenDimensions(_topBound, topBound))
+    return;
+  _topBound = topBound;
+  [self animate];
+}
+
+- (CGFloat)topBound
+{
+  return MAX(0.0, _topBound);
+}
+
+@synthesize bottomBound = _bottomBound;
+
+- (void)setBottomBound:(CGFloat)bottomBound
+{
+  if (equalScreenDimensions(_bottomBound, bottomBound))
+    return;
+  _bottomBound = bottomBound;
+  [self animate];
+}
+
+- (CGFloat)bottomBound
+{
+  if (!self.superview)
+    return _bottomBound;
+  BOOL const isPortrait = self.superview.width < self.superview.height;
+  CGFloat limit = IPAD ? 320.0 : isPortrait ? 200.0 : 80.0;
+  return MIN(self.superview.height - limit, _bottomBound);
+}
+
+@end