Added scrolling to level selection screen

Using http://www.xcombinator.com/2010/09/08/a-paging-uiscrollview-in-cocos2d-with-previews/ as a base, I was able to implement a paging scroller for the level selection screen so players can swipe through available levels and choose one to play.

At this point, the level selection screen is practically done--the only other thing I want to add is a UIPageControl to interact with the scrolling and give the player an indication of how many levels there are.

Refs #207

1 files changed, 99 insertions, 0 deletions

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+//
+//  CocosOverlayScrollView.m
+//  shapes
+//
+//  Created by Nate Murray on 8/23/10.
+//  Copyright 2010 LittleHiccup. All rights reserved.
+//
+
+#import "CocosOverlayScrollView.h"
+
+@implementation CocosOverlayScrollView
+@synthesize targetLayer;
+
+// Configure your favorite UIScrollView options here
+-(id) initWithFrame: (CGRect) frameRect numPages: (int) numPages width: (float) width layer: (CCNode*) layer {
+    if ((self = [super initWithFrame: frameRect])){ 
+        self.contentSize = CGSizeMake(width*numPages, 320);
+        self.bounces = YES;
+        self.delaysContentTouches = NO;
+        self.delegate = self;
+        self.pagingEnabled = YES;
+        self.scrollsToTop = NO;
+        self.showsVerticalScrollIndicator = NO;
+        self.showsHorizontalScrollIndicator = NO;
+        [self setUserInteractionEnabled:TRUE];
+        [self setScrollEnabled:TRUE];
+        self.targetLayer = layer;
+        // self.canCancelContentTouches  = YES;
+    }
+    return self;
+}
+
+-(void) touchesBegan: (NSSet *) touches withEvent: (UIEvent *) event
+{
+    if (!self.dragging)
+    {
+        // UITouch* touch = [[touches allObjects] objectAtIndex:0];
+        // CGPoint location = [touch locationInView: [[touch view] superview]];
+        // CCLOG(@"touch at l.x:%f l.y:%f", location.x, location.y);
+
+        [self.nextResponder touchesBegan: touches withEvent:event];
+        [[[CCDirector sharedDirector] openGLView] touchesBegan:touches withEvent:event];
+    }
+
+    [super touchesBegan: touches withEvent: event];
+}
+
+-(void) touchesEnded: (NSSet *) touches withEvent: (UIEvent *) event
+{
+    if (!self.dragging)
+    {
+        [self.nextResponder touchesEnded: touches withEvent:event];
+        [[[CCDirector sharedDirector] openGLView] touchesEnded:touches withEvent:event];
+    }
+
+    [super touchesEnded: touches withEvent: event];
+}
+
+-(void) touchesCancelled: (NSSet *) touches withEvent: (UIEvent *) event
+{
+    // if (!self.dragging)
+    // {
+        // CCLOG(@"CocosOverlayScrollView touchesEnded not dragging");
+        [self.nextResponder touchesCancelled: touches withEvent:event];
+        [[[CCDirector sharedDirector] openGLView] touchesCancelled:touches withEvent:event];
+    // }
+    [super touchesCancelled: touches withEvent: event];
+}
+
+
+- (void)scrollViewWillBeginDecelerating:(UIScrollView *)scrollView
+{
+  // TODO - Custom code for handling deceleration of the scroll view
+}
+
+- (void)scrollViewDidScroll:(UIScrollView *)scrollView
+{
+    CGPoint dragPt = [scrollView contentOffset];
+    dragPt = [[CCDirector sharedDirector] convertToGL:dragPt];
+
+    dragPt.y = dragPt.y * -1;
+    dragPt.x = dragPt.x * -1;
+
+    CGPoint newLayerPosition = CGPointMake(dragPt.x, dragPt.y);
+
+    [targetLayer setPosition:newLayerPosition];
+}
+
+- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView
+{
+    // CGPoint dragPt = [scrollView contentOffset];
+    // etc.
+}
+
+-(void) dealloc {
+    self.targetLayer = nil;
+    [super dealloc];
+}
+@end
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