mirror of
https://github.com/id-Software/DOOM-IOS2.git
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Initial Commit
This commit is contained in:
Jeff Farrand
512
common/idmobilelib/ios/Carousel.mm
Executable file
512
common/idmobilelib/ios/Carousel.mm
Executable file
@@ -0,0 +1,512 @@
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/*
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Copyright (C) 2009-2011 id Software LLC, a ZeniMax Media company.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#import <Foundation/Foundation.h>
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#import <UIKit/UIKit.h>
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#import "Carousel.h"
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#include <algorithm>
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@implementation idCarouselItem
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@synthesize image;
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@synthesize title;
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@synthesize hash;
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@end
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@implementation idCarousel
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// Move full turn at this percentage
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const static float CAROUSEL_CHANGE_DRAG = 0.2f;
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const static float CAROUSEL_BACKITEMS_ALPHA = 0.5f;
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const static float CAROUSEL_FRONTITEM_ALPHA = 1.0f;
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enum idCarouselDrag_t {
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CAROUSEL_DRAG_MOVE_NONE = 0,
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CAROUSEL_DRAG_MOVE_FORWARD,
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CAROUSEL_DRAG_MOVE_BACKWARD
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};
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/*
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========================
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Lerp
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========================
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*/
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static CGFloat Lerp(CGFloat from, CGFloat to, CGFloat f )
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{
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return from + ( ( to - from ) * f );
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}
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/*
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========================
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LerpPoint
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========================
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*/
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static CGPoint LerpPoint(CGPoint a, CGPoint b, CGFloat t)
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{
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CGPoint p;
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p.x = Lerp(a.x, b.x, t);
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p.y = Lerp(a.y, b.y, t);
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return p;
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}
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/*
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========================
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LerpSize
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========================
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*/
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static CGSize LerpSize(CGSize a, CGSize b, CGFloat t)
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{
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CGSize s;
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s.width = Lerp(a.width, b.width, t);
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s.height = Lerp(a.height, b.height, t);
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return s;
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}
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/*
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========================
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LerpRect
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========================
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*/
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static CGRect LerpRect( CGRect a, CGRect b, CGFloat t ) {
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CGRect r;
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r.origin = LerpPoint( a.origin, b.origin, t );
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r.size = LerpSize( a.size, b.size, t );
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return r;
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}
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/*
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========================
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awakeFromNib
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========================
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*/
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- (void) awakeFromNib {
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mainRect = mainSelection.frame;
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prevRect = prevSelection.frame;
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nextRect = nextSelection.frame;
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// Allocate our Items Array
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carouselItems = [[ NSMutableArray alloc ] init ];
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}
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/*
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========================
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touchesBegan
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========================
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*/
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- (void) touchesBegan:(NSSet*)touches withEvent:(UIEvent*)event {
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(void)(event);
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hasDragged = 0;
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startDragPoint = [[touches anyObject] locationInView:self];
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}
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/*
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========================
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touchesMoved
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========================
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*/
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- (void) touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
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(void)(event);
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if( prevSelection == nil || nextSelection == nil ) {
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// Nothing to transition to... dont swip transition
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return;
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}
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CGPoint movedPoint = [[touches anyObject] locationInView:self];
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CGFloat offsetX = movedPoint.x - startDragPoint.x;
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// Find out where im at relative to the side of the screen
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CGFloat percentage = offsetX / self.frame.size.width;
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percentage = (float)fmin( percentage, 1.0f );
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percentage = (float)fmax( percentage, -1.0f );
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if( percentage > CAROUSEL_CHANGE_DRAG ) {
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hasDragged = CAROUSEL_DRAG_MOVE_FORWARD;
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} else if( percentage < -CAROUSEL_CHANGE_DRAG ) {
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hasDragged = CAROUSEL_DRAG_MOVE_BACKWARD;
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}
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if( percentage > 0 ) { // Going to the right of the screen..
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CGRect newMainRect = LerpRect( mainRect, nextRect , percentage );
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CGRect newNextRect = LerpRect( nextRect, prevRect , percentage );
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CGRect newPrevRect = LerpRect( prevRect, mainRect , percentage );
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mainSelection.frame = newMainRect;
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prevSelection.frame = newPrevRect;
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nextSelection.frame = newNextRect;
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mainSelection.alpha = Lerp( CAROUSEL_FRONTITEM_ALPHA, CAROUSEL_BACKITEMS_ALPHA, percentage );
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prevSelection.alpha = Lerp( CAROUSEL_BACKITEMS_ALPHA, CAROUSEL_FRONTITEM_ALPHA, percentage );
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} else { // Going the left.
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percentage = fabsf( percentage );
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CGRect newMainRect = LerpRect( mainRect, prevRect , percentage );
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CGRect newNextRect = LerpRect( nextRect, mainRect , percentage );
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CGRect newPrevRect = LerpRect( prevRect, nextRect , percentage );
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mainSelection.frame = newMainRect;
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prevSelection.frame = newPrevRect;
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nextSelection.frame = newNextRect;
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mainSelection.alpha = Lerp( CAROUSEL_FRONTITEM_ALPHA, CAROUSEL_BACKITEMS_ALPHA, percentage );
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nextSelection.alpha = Lerp( CAROUSEL_BACKITEMS_ALPHA, CAROUSEL_FRONTITEM_ALPHA, percentage );
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}
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}
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/*
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========================
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touchesEnded
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========================
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*/
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- (void) touchesEnded:(NSSet*)touches withEvent:(UIEvent*)event {
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(void)(event);
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(void)(touches);
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if( hasDragged == CAROUSEL_DRAG_MOVE_FORWARD ) {
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[ self RotateForward ];
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} else if( hasDragged == CAROUSEL_DRAG_MOVE_BACKWARD ) {
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[ self RotateBackward ];
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} else {
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[ self RotateToOrigin ];
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}
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}
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/*
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========================
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Init
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========================
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*/
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- (void) Init {
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// Get the items At the new layout.
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idCarouselItem * cItem = [ carouselItems objectAtIndex: (NSUInteger)currentItem ];
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idCarouselItem * nItem = [ carouselItems objectAtIndex: (NSUInteger)nextItem ];
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idCarouselItem * pItem = [ carouselItems objectAtIndex: (NSUInteger)prevItem ];
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// Set the Main Selection Text.
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[ selectionLabel setText: cItem.title ];
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// Set the prev selection UIImage
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mainSelection.image = cItem.image;
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prevSelection.image = nItem.image;
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nextSelection.image = pItem.image;
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}
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/*
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========================
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AddCarouselItem
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========================
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*/
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- (void) AddCarouselItem:( NSString* )Image
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:( NSString* )Title
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:( int ) ItemHash {
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idCarouselItem * Item = [ idCarouselItem alloc ];
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// Initialize the Item with the data passed in.
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Item.image = [UIImage imageNamed: Image ];
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Item.title = Title;
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Item.hash = ItemHash;
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// Add the Item to our object array.
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[ carouselItems addObject: Item ];
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// Set the Cur Item as the one just added.
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currentItem = 0;
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nextItem = 1;
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prevItem = (NSInteger)[ carouselItems count ] - 1;
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}
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/*
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========================
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GetSelectedItem_Index
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========================
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*/
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- (NSInteger) GetSelectedItem_Index {
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return currentItem;
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}
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/*
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========================
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GetSelectedItem_Hash
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========================
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*/
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- (int) GetSelectedItem_Hash {
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idCarouselItem * item = [ carouselItems objectAtIndex: (NSUInteger)currentItem ];
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return item.hash;
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}
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/*
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========================
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MoveForward
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Interface Builder Direct Access to moving the Carousel
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========================
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*/
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- (IBAction) MoveForward {
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[ self RotateForward ];
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}
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/*
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========================
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MoveBackward -
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Interface Builder Direct Access to moving the Carousel
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========================
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*/
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- (IBAction) MoveBackward {
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[ self RotateBackward ];
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}
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/*
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========================
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RotateToOrigin
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========================
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*/
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- (void) RotateToOrigin {
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// Animate back to the correct position.
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// Move the Current Selection to Next Selection
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[UIView beginAnimations:nil context:nil];
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[UIView setAnimationCurve:UIViewAnimationCurveEaseOut];
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[UIView setAnimationBeginsFromCurrentState:YES];
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// Move them into Place.
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mainSelection.frame = mainRect;
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prevSelection.frame = prevRect;
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nextSelection.frame = nextRect;
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mainSelection.alpha = 1.0f;
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nextSelection.alpha = CAROUSEL_BACKITEMS_ALPHA;
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prevSelection.alpha = CAROUSEL_BACKITEMS_ALPHA;
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[UIView commitAnimations];
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}
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/*
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========================
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RotateForward
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========================
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*/
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- (void) RotateForward {
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if( prevSelection == nil || nextSelection == nil ) {
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// Flip book to the next selection.
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// increment the item indicies.
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currentItem++;
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nextItem++;
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prevItem++;
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// Check the Extents.
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if( currentItem >= (NSInteger)[ carouselItems count ] ) {
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currentItem = 0;
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}
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if( nextItem >= (NSInteger)[ carouselItems count ] ) {
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nextItem = 0;
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}
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if( prevItem >= (NSInteger)[ carouselItems count ] ) {
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prevItem = 0;
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}
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idCarouselItem * cItem = [ carouselItems objectAtIndex: (NSUInteger)currentItem ];
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// Set the Main Selection Text.
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[ selectionLabel setText: cItem.title ];
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// Set the prev selection UIImage
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mainSelection.image = cItem.image;
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[self sendActionsForControlEvents:UIControlEventValueChanged];
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return;
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}
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UIImageView * tempMain = mainSelection;
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UIImageView * tempPrev = prevSelection;
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UIImageView * tempNext = nextSelection;
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// Move the Current Selection to Next Selection
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[UIView beginAnimations:nil context:nil];
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[UIView setAnimationCurve:UIViewAnimationCurveEaseOut];
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[UIView setAnimationBeginsFromCurrentState:YES];
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// Move them into Place.
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mainSelection.frame = nextRect;
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prevSelection.frame = mainRect;
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nextSelection.frame = prevRect;
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// Darken the prev/next
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mainSelection.alpha = CAROUSEL_BACKITEMS_ALPHA;
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prevSelection.alpha = CAROUSEL_FRONTITEM_ALPHA;
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nextSelection.alpha = CAROUSEL_BACKITEMS_ALPHA;
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[UIView commitAnimations];
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// Swap out the ImageViews so that they are in the correct order.
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nextSelection = tempMain;
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mainSelection = tempPrev;
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prevSelection = tempNext;
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// Make sure they are in back of the main selection.
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[ self sendSubviewToBack: nextSelection ];
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[ self sendSubviewToBack: prevSelection ];
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// increment the item indicies.
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currentItem++;
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nextItem++;
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prevItem++;
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// Check the Extents.
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if( currentItem >= (NSInteger)[ carouselItems count ] ) {
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currentItem = 0;
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}
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if( nextItem >= (NSInteger)[ carouselItems count ] ) {
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nextItem = 0;
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}
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if( prevItem >= (NSInteger)[ carouselItems count ] ) {
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prevItem = 0;
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}
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// Get the items At the new layout.
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idCarouselItem * cItem = [ carouselItems objectAtIndex: (NSUInteger)currentItem ];
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idCarouselItem * nItem = [ carouselItems objectAtIndex: (NSUInteger)nextItem ];
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idCarouselItem * pItem = [ carouselItems objectAtIndex: (NSUInteger)prevItem ];
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// Set the Main Selection Text.
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[ selectionLabel setText: cItem.title ];
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// Set the prev selection UIImage
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mainSelection.image = cItem.image;
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prevSelection.image = nItem.image;
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nextSelection.image = pItem.image;
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[self sendActionsForControlEvents:UIControlEventValueChanged];
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}
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/*
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========================
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RotateBackward
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========================
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*/
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- (void) RotateBackward {
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if( nextSelection == nil || prevSelection == nil ) {
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// increment the item indicies.
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currentItem--;
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nextItem--;
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prevItem--;
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// Check the Extents.
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if( currentItem < 0 ) {
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currentItem = (NSInteger)[ carouselItems count ] - 1;
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}
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if( nextItem < 0 ) {
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nextItem = (NSInteger)[ carouselItems count ] - 1;;
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}
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if( prevItem < 0 ) {
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prevItem = (NSInteger)[ carouselItems count ] - 1;;
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}
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idCarouselItem * cItem = [ carouselItems objectAtIndex: (NSUInteger)currentItem ];
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// Set the Main Selection Text.
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[ selectionLabel setText: cItem.title ];
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// Set the prev selection UIImage
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mainSelection.image = cItem.image;
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[self sendActionsForControlEvents:UIControlEventValueChanged];
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return;
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}
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UIImageView * tempMain = mainSelection;
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UIImageView * tempPrev = prevSelection;
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UIImageView * tempNext = nextSelection;
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// Move the Current Selection to Next Selection
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[UIView beginAnimations:nil context:nil];
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[UIView setAnimationCurve:UIViewAnimationCurveEaseOut];
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[UIView setAnimationBeginsFromCurrentState:YES];
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// Move them into Place.
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mainSelection.frame = prevRect;
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prevSelection.frame = nextRect;
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nextSelection.frame = mainRect;
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// Darken the prev/next
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mainSelection.alpha = CAROUSEL_BACKITEMS_ALPHA;
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prevSelection.alpha = CAROUSEL_BACKITEMS_ALPHA;
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nextSelection.alpha = CAROUSEL_FRONTITEM_ALPHA;
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[UIView commitAnimations];
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// Swap out the ImageViews so that they are in the correct order.
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nextSelection = tempPrev;
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mainSelection = tempNext;
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prevSelection = tempMain;
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// Make sure they are in back of the main selection.
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[ self sendSubviewToBack: nextSelection ];
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[ self sendSubviewToBack: prevSelection ];
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// increment the item indicies.
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currentItem--;
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nextItem--;
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prevItem--;
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// Check the Extents.
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if( currentItem < 0 ) {
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currentItem = (NSInteger)[ carouselItems count ] - 1;
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}
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if( nextItem < 0 ) {
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nextItem = (NSInteger)[ carouselItems count ] - 1;;
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}
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if( prevItem < 0 ) {
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prevItem = (NSInteger)[ carouselItems count ] - 1;;
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}
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// Get the items At the new layout.
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idCarouselItem * cItem = [ carouselItems objectAtIndex: (NSUInteger) currentItem ];
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idCarouselItem * nItem = [ carouselItems objectAtIndex: (NSUInteger)nextItem ];
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idCarouselItem * pItem = [ carouselItems objectAtIndex: (NSUInteger)prevItem ];
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// Set the Main Selection Text.
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[ selectionLabel setText: cItem.title ];
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// Set the prev selection UIImage
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mainSelection.image = cItem.image;
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prevSelection.image = nItem.image;
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nextSelection.image = pItem.image;
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[self sendActionsForControlEvents:UIControlEventValueChanged];
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}
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@end
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Reference in New Issue
Block a user