Chapter 6.2 of the Cosmos tutorial
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// Copyright © 2016 C4 | |
// | |
// Permission is hereby granted, free of charge, to any person obtaining a copy | |
// of this software and associated documentation files (the "Software"), to | |
// deal in the Software without restriction, including without limitation the | |
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or | |
// sell copies of the Software, and to permit persons to whom the Software is | |
// furnished to do so, subject to the following conditions: The above copyright | |
// notice and this permission notice shall be included in all copies or | |
// substantial portions of the Software. | |
// | |
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | |
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS | |
// IN THE SOFTWARE. | |
import UIKit | |
public class SignLines : InfiniteScrollView { | |
//MARK: - | |
//MARK: Properties | |
//The entire set of lines, each entry is itself a set of lines | |
var lines : [[Line]]! | |
//The current index, used to grab the proper set of lines | |
var currentIndex : Int = 0 | |
//Returns the current set of lines based on the current index | |
var currentLines : [Line] { | |
get { | |
let set = lines[currentIndex] | |
return set | |
} | |
} | |
//MARK: - | |
//MARK: Initialization | |
public override init(frame: CGRect) { | |
super.init(frame: frame) | |
//grab the number of signs we're going to work with | |
let count = CGFloat(AstrologicalSignProvider.sharedInstance.order.count) | |
//calculate the content size of the entire layer, add a width to compensate for the scrollview overlap | |
contentSize = CGSizeMake(frame.width * (count * gapBetweenSigns + 1), 1.0) | |
//grab the order of the signs | |
var signOrder = AstrologicalSignProvider.sharedInstance.order | |
//append a copy of the first sign to the end of the order (now there will be 13) | |
signOrder.append(signOrder[0]) | |
lines = [[Line]]() | |
for i in 0..<signOrder.count { | |
//calculate the current displacement for the sign | |
let dx = Double(i) * Double(frame.width * gapBetweenSigns) | |
//create a translation that considers the dx as well as positioning in vertical center of the screen | |
let t = Transform.makeTranslation(Vector(x: Double(center.x) + dx, y: Double(center.y), z: 0)) | |
//grab the sign for the current name | |
if let sign = AstrologicalSignProvider.sharedInstance.get(signOrder[i]) { | |
//extract the line connections | |
let connections = sign.lines | |
//create a current set of lines | |
var currentLineSet = [Line]() | |
//iterate through the points in the current set of connections | |
for points in connections { | |
//grab and transform the points | |
var begin = points[0] | |
begin.transform(t) | |
var end = points[1] | |
end.transform(t) | |
//create and style a line | |
let line = Line((begin,end)) | |
line.lineWidth = 1.0 | |
line.strokeColor = cosmosprpl | |
line.opacity = 0.4 | |
line.strokeEnd = 0.0 | |
//add the line to the canvas and to the current line set | |
add(line) | |
currentLineSet.append(line) | |
} | |
//append the current set to the lines array | |
lines.append(currentLineSet) | |
} | |
} | |
} | |
public required init?(coder aDecoder: NSCoder) { | |
super.init(coder: aDecoder) | |
} | |
//MARK: - | |
//MARK: Animations | |
func revealCurrentSignLines() { | |
ViewAnimation(duration: 0.25) { | |
for line in self.currentLines { | |
line.strokeEnd = 1.0 | |
} | |
}.animate() | |
} | |
func hideCurrentSignLines() { | |
ViewAnimation(duration: 0.25) { | |
for line in self.currentLines { | |
line.strokeEnd = 0.0 | |
} | |
}.animate() | |
} | |
} |
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