From 1c29777c0f12933e536f99b60c9fe9f7dbeedf71 Mon Sep 17 00:00:00 2001
From: Mike Enriquez <mike@enriquez.me>
Date: Thu, 26 Jan 2012 14:41:41 -0500
Subject: [PATCH] Improve performance of shadow while rotating

---
 .../FirstTopViewController.m                  | 27 ++++++++++-
 .../ECSlidingViewController.h                 |  3 ++
 .../ECSlidingViewController.m                 | 45 ++++++++++---------
 3 files changed, 52 insertions(+), 23 deletions(-)

diff --git a/ECSlidingViewController/FirstTopViewController.m b/ECSlidingViewController/FirstTopViewController.m
index 734928f..73a61a0 100644
--- a/ECSlidingViewController/FirstTopViewController.m
+++ b/ECSlidingViewController/FirstTopViewController.m
@@ -32,9 +32,32 @@
 {
   // if going from portrait to landscape or landscape to portrait
   if (UIInterfaceOrientationIsLandscape(toInterfaceOrientation) != UIInterfaceOrientationIsLandscape(self.interfaceOrientation)) {
-    CGRect bounds = self.view.layer.bounds;
-    self.view.layer.shadowPath = [UIBezierPath bezierPathWithRect:CGRectMake(bounds.origin.y, bounds.origin.x, bounds.size.height, bounds.size.width)].CGPath;
+    // adjust peek amount
+    if ([self.slidingViewController underLeftShowing] && UIInterfaceOrientationIsLandscape(toInterfaceOrientation)) {
+      [self.slidingViewController jumpToPeekAmount:26.0f inDirection:ECSlideRight];
+    } else if ([self.slidingViewController underLeftShowing] && UIInterfaceOrientationIsPortrait(toInterfaceOrientation)) {
+      [self.slidingViewController jumpToPeekAmount:60.0f inDirection:ECSlideRight];
+    } else if ([self.slidingViewController underRightShowing] && UIInterfaceOrientationIsLandscape(toInterfaceOrientation)) {
+      [self.slidingViewController jumpToPeekAmount:26.0f inDirection:ECSlideLeft];
+    } else if ([self.slidingViewController underRightShowing] && UIInterfaceOrientationIsPortrait(toInterfaceOrientation)) {
+      [self.slidingViewController jumpToPeekAmount:60.0f inDirection:ECSlideLeft];
+    }
   }
+  
+  self.view.layer.shadowPath = nil;
+  self.view.layer.shouldRasterize = YES;
+}
+
+- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation
+{
+  if ([self.slidingViewController underLeftShowing]) {
+    [self.slidingViewController jumpToPeekAmount:40.0f inDirection:ECSlideRight];
+  } else if ([self.slidingViewController underRightShowing]) {
+    [self.slidingViewController jumpToPeekAmount:40.0f inDirection:ECSlideLeft];
+  }
+  
+  self.view.layer.shadowPath = [UIBezierPath bezierPathWithRect:self.view.layer.bounds].CGPath;
+  self.view.layer.shouldRasterize = NO;
 }
 
 - (IBAction)revealMenu:(id)sender
diff --git a/ECSlidingViewController/Vendor/ECSlidingViewController/ECSlidingViewController.h b/ECSlidingViewController/Vendor/ECSlidingViewController/ECSlidingViewController.h
index 9906fa0..f8e7060 100644
--- a/ECSlidingViewController/Vendor/ECSlidingViewController/ECSlidingViewController.h
+++ b/ECSlidingViewController/Vendor/ECSlidingViewController/ECSlidingViewController.h
@@ -22,7 +22,10 @@ typedef enum {
 
 - (void)slideInDirection:(ECSlideDirection)slideDirection peekAmount:(CGFloat)peekAmount onComplete:(void(^)())completeBlock;
 - (void)enablePanningInDirection:(ECSlideDirection)slideDirection forView:(UIView *)view peekAmount:(CGFloat)peekAmount;
+- (void)jumpToPeekAmount:(CGFloat)peekAmount inDirection:(ECSlideDirection)direction;
 - (void)reset;
+- (BOOL)underLeftShowing;
+- (BOOL)underRightShowing;
 
 @end
 
diff --git a/ECSlidingViewController/Vendor/ECSlidingViewController/ECSlidingViewController.m b/ECSlidingViewController/Vendor/ECSlidingViewController/ECSlidingViewController.m
index 88b457f..0d408cf 100644
--- a/ECSlidingViewController/Vendor/ECSlidingViewController/ECSlidingViewController.m
+++ b/ECSlidingViewController/Vendor/ECSlidingViewController/ECSlidingViewController.m
@@ -29,8 +29,6 @@
 - (CGFloat)resettedCenter;
 - (CGFloat)screenWidth;
 - (CGFloat)screenWidthForOrientation:(UIInterfaceOrientation)orientation;
-- (BOOL)underLeftShowing;
-- (BOOL)underRightShowing;
 - (void)underLeftWillAppear;
 - (void)underRightWillAppear;
 - (void)topDidReset;
@@ -166,16 +164,8 @@
 
 - (void)slideInDirection:(ECSlideDirection)slideDirection peekAmount:(CGFloat)peekAmount onComplete:(void(^)())completeBlock;
 {
-  CGFloat newCenter = self.topView.center.x;
-  
-  if (slideDirection == ECSlideLeft) {
-    newCenter = -self.screenWidth + self.resettedCenter + peekAmount;
-  } else if (slideDirection == ECSlideRight) {
-    newCenter = self.screenWidth + self.resettedCenter - peekAmount;
-  }
-  
   [UIView animateWithDuration:0.25f animations:^{
-    [self updateTopViewHorizontalCenter:newCenter];
+    [self jumpToPeekAmount:peekAmount inDirection:slideDirection];
   } completion:^(BOOL finished) {
     if (completeBlock) {
       completeBlock();
@@ -196,6 +186,19 @@
   }
 }
 
+- (void)jumpToPeekAmount:(CGFloat)peekAmount inDirection:(ECSlideDirection)slideDirection
+{
+  CGFloat newCenter = self.topView.center.x;
+  
+  if (slideDirection == ECSlideLeft) {
+    newCenter = -self.screenWidth + self.resettedCenter + peekAmount;
+  } else if (slideDirection == ECSlideRight) {
+    newCenter = self.screenWidth + self.resettedCenter - peekAmount;
+  }
+  
+  [self updateTopViewHorizontalCenter:newCenter];
+}
+
 - (void)reset
 {
   [UIView animateWithDuration:0.25f animations:^{
@@ -203,6 +206,16 @@
   }];
 }
 
+- (BOOL)underLeftShowing
+{
+  return self.topView.frame.origin.x > 0;
+}
+
+- (BOOL)underRightShowing
+{
+  return self.topView.frame.origin.x < 0;
+}
+
 - (NSUInteger)autoResizeToFillScreen
 {
   return (UIViewAutoresizingFlexibleWidth |
@@ -287,16 +300,6 @@
   return size.width;
 }
 
-- (BOOL)underLeftShowing
-{
-  return self.topView.frame.origin.x > 0;
-}
-
-- (BOOL)underRightShowing
-{
-  return self.topView.frame.origin.x < 0;
-}
-
 - (void)underLeftWillAppear
 {
   [self addTopViewSnapshot];