Positioning mode and pan gesture delegate

MFSideMenu/MFSideMenuContainerViewController.h

@@ -18,6 +18,11 @@ typedef enum {
     MFSideMenuPanModeDefault = MFSideMenuPanModeCenterViewController | MFSideMenuPanModeSideMenu
 } MFSideMenuPanMode;
 
+typedef enum {
+    MFSideMenuPositioningModeUnderTop, // side controllers' z-index will be greater than center controller's z-index
+    MFSideMenuPositioningModeSideBySide // side controllers will reside side by side with center controller
+} MFSideMenuPositioningMode;
+
 typedef enum {
     MFSideMenuStateClosed, // the menu is closed
     MFSideMenuStateLeftMenuOpen, // the left-hand menu is open
@@ -31,6 +36,13 @@ typedef enum {
     MFSideMenuStateEventMenuDidClose // the menu finished closing
 } MFSideMenuStateEvent;
 
+@protocol MFSideMenuContainerViewControllerPanProtocol <NSObject>
+
+@optional
+- (void)mfSideMenuPanGestureRecognizerDidPanWithOffset:(CGFloat)offset;
+
+@end
+
 
 @interface MFSideMenuContainerViewController : UIViewController<UIGestureRecognizerDelegate>
 
@@ -44,6 +56,7 @@ typedef enum {
 
 @property (nonatomic, assign) MFSideMenuState menuState;
 @property (nonatomic, assign) MFSideMenuPanMode panMode;
+@property (nonatomic, assign) MFSideMenuPositioningMode positioningMode;
 
 // menu open/close animation duration -- user can pan faster than default duration, max duration sets the limit
 @property (nonatomic, assign) CGFloat menuAnimationDefaultDuration;
@@ -61,6 +74,7 @@ typedef enum {
 @property (nonatomic, assign) BOOL menuSlideAnimationEnabled;
 @property (nonatomic, assign) CGFloat menuSlideAnimationFactor; // higher = less menu movement on animation
 
+@property (nonatomic, assign) id <MFSideMenuContainerViewControllerPanProtocol> panGestureDelegate;
 
 - (void)toggleLeftSideMenuCompletion:(void (^)(void))completion;
 - (void)toggleRightSideMenuCompletion:(void (^)(void))completion;

MFSideMenu/MFSideMenuContainerViewController.m

@@ -24,6 +24,9 @@ @interface MFSideMenuContainerViewController ()
 @property (nonatomic, assign) CGFloat panGestureVelocity;
 @property (nonatomic, assign) MFSideMenuPanDirection panDirection;
 
+@property (nonatomic, strong) UIGestureRecognizer *panGestureRecognizer;
+@property (nonatomic, strong) UIGestureRecognizer *tapGestureRecognizer;
+
 @property (nonatomic, assign) BOOL viewHasAppeared;
 @end
 
@@ -269,16 +272,25 @@ - (void)removeChildViewControllerFromContainer:(UIViewController *)childViewCont
 #pragma mark - UIGestureRecognizer Helpers
 
 - (UIPanGestureRecognizer *)panGestureRecognizer {
+
+    if (!_panGestureRecognizer) {
+        _panGestureRecognizer = [self createPanGestureRecognizer];
+    }
+
+    return _panGestureRecognizer;
+}
+
+- (UIPanGestureRecognizer *)createPanGestureRecognizer {
     UIPanGestureRecognizer *recognizer = [[UIPanGestureRecognizer alloc]
-                                          initWithTarget:self action:@selector(handlePan:)];
-	[recognizer setMaximumNumberOfTouches:1];
+     initWithTarget:self action:@selector(handlePan:)];
+    [recognizer setMaximumNumberOfTouches:1];
     [recognizer setDelegate:self];
     return recognizer;
 }
 
 - (void)addGestureRecognizers {
     [self addCenterGestureRecognizers];
-    [menuContainerView addGestureRecognizer:[self panGestureRecognizer]];
+    [menuContainerView addGestureRecognizer:[self createPanGestureRecognizer]];
 }
 
 - (void)removeCenterGestureRecognizers
@@ -300,11 +312,12 @@ - (void)addCenterGestureRecognizers
 
 - (UITapGestureRecognizer *)centerTapGestureRecognizer
 {
-    UITapGestureRecognizer *tapRecognizer = [[UITapGestureRecognizer alloc]
-                                             initWithTarget:self
-                                             action:@selector(centerViewControllerTapped:)];
-    [tapRecognizer setDelegate:self];
-    return tapRecognizer;
+    if (!_tapGestureRecognizer) {
+        _tapGestureRecognizer = [[UITapGestureRecognizer alloc]
+                                 initWithTarget:self
+                                 action:@selector(centerViewControllerTapped:)];
+    }
+    return _tapGestureRecognizer;
 }
 
 
@@ -759,6 +772,20 @@ - (void) setCenterViewControllerOffset:(CGFloat)xOffset {
     frame.origin.x = xOffset;
     [self.centerViewController view].frame = frame;
 
+    if (self.positioningMode == MFSideMenuPositioningModeSideBySide) {
+        frame = [self.leftMenuViewController view].frame;
+        frame.origin.x = [self.centerViewController view].frame.origin.x - frame.size.width;
+        [self.leftMenuViewController view].frame = frame;
+
+        frame = [self.rightMenuViewController view].frame;
+        frame.origin.x = [self.centerViewController view].frame.origin.x - [self.centerViewController view].frame.size.width;
+        [self.rightMenuViewController view].frame = frame;
+    }
+
+    if (self.panGestureDelegate) {
+        [self.panGestureDelegate mfSideMenuPanGestureRecognizerDidPanWithOffset:xOffset];
+    }
+
     if(!self.menuSlideAnimationEnabled) return;
 
     if(xOffset > 0){