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Chapter 7.4 of the Cosmos Tutorial
// 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 MenuSelector : CanvasController {
//MARK: -
//MARK: Properties
//The current menu selection index
var currentSelection = -1
//The label that displays the current selection's name
var menuLabel : TextShape!
//The shape that underlays the radial menu selection
var highlight : Shape!
//The button that triggers the info panel
var infoButton : View!
//Animations
var revealInfoButton : ViewAnimation!
var hideInfoButton : ViewAnimation!
//Sounds for the opening and closing of the menu
//We keep these sounds here because they are triggered based
//on the user's selection
let tick = AudioPlayer("tick.mp3")!
//MARK: -
//MARK: Setup
public override func setup() {
//create the frame, small like the other classes
canvas.frame = Rect(0,0,80,80)
canvas.backgroundColor = clear
createHighlight()
createLabel()
createInfoButton()
createInfoButtonAnimations()
tick.volume = 0.4
}
//MARK: -
//MARK: Update
func update(location: Point) {
//check the distance of of user's gesture location
let dist = distance(location, rhs: self.canvas.bounds.center)
//if it is within the bounds of the out menu area
if dist > 102 && dist < 156 {
highlight.hidden = false
//create three vectors (a & b are constant)
let a = Vector(x:self.canvas.width / 2.0+1.0, y:self.canvas.height/2.0)
let b = Vector(x:self.canvas.width / 2.0, y:self.canvas.height/2.0)
let c = Vector(x:location.x, y:location.y)
//calculate the angle between a & c where b is the center of the canvas
var ϴ = c.angleTo(a, basedOn: b)
if c.y < a.y {
ϴ = 2*M_PI - ϴ
}
//reveal the label
menuLabel.hidden = false
//calculate the index of the menu 0 = pices (on the right-hand side of the menu)
let index = Int(radToDeg(ϴ)) / 30
//if the current selection is new
if currentSelection != index {
//stop playback immediately
tick.stop()
//play the tick
tick.play()
//disable animations (because we want the text shape to switch immediately)
ShapeLayer.disableActions = true
//set the label's text by grabbing the name of the current selection
menuLabel.text = AstrologicalSignProvider.sharedInstance.order[index].capitalizedString
//center the label
menuLabel.center = canvas.bounds.center
ShapeLayer.disableActions = false
//update the current selection
currentSelection = index
//rotate the highlight
let rotation = Transform.makeRotation(degToRad(Double(currentSelection) * 30.0), axis: Vector(x: 0,y: 0,z: -1))
highlight.transform = rotation
}
} else {
//the user's touch isn't within the bounds of the menu
self.highlight?.hidden = true
self.menuLabel?.hidden = true
//the user isn't selecting anything, so set it to -1
self.currentSelection = -1
//check the info button and hittest it
if let l = infoButton {
if l.hitTest(location, from:canvas) {
//if the user's touch is on the info button
menuLabel.hidden = false
ShapeLayer.disableActions = true
//update the label
menuLabel.text = "Info"
menuLabel.center = canvas.bounds.center
ShapeLayer.disableActions = false
}
}
}
}
//MARK: -
//MARK: Highlight
func createHighlight() {
//The main shape of the highlight is a wedge that starts at the center of the canvas
//M_PI/6.0 is technically 1/12th of a full circle
highlight = Wedge(center: canvas.center, radius: 156, start: M_PI/6.0, end: 0.0, clockwise: false)
highlight.fillColor = cosmosblue
highlight.lineWidth = 0.0
highlight.opacity = 0.8
highlight.interactionEnabled = false
//We want the shape to rotate around the center, so we set the anchor point properly
highlight.anchorPoint = Point()
highlight.center = canvas.center
highlight.hidden = true
//To cut out everything we don't want to see, we create a donut that covers the area of the menu
let donut = Circle(center: highlight.center, radius: 156-54/2.0)
donut.fillColor = clear
donut.lineWidth = 54
//and use the donut as a mask on the wedge
highlight.mask = donut
canvas.add(highlight)
}
//MARK: -
//MARK: Menu Label
func createLabel() {
let f = Font(name: "Menlo-Regular", size: 13)!
menuLabel = TextShape(text: "Cosmos", font: f)!
menuLabel.center = canvas.center
menuLabel.fillColor = white
menuLabel.interactionEnabled = false
canvas.add(menuLabel)
menuLabel.hidden = true
}
//MARK: -
//MARK: Info Button
func createInfoButton() {
//The info button is a view because we want its frame to be larger than the small icon we'll use
//This is so that area is easier to select for the user
infoButton = View(frame: Rect(0,0,44,44))
let buttonImage = Image("info")!
buttonImage.interactionEnabled = false
buttonImage.center = infoButton.center
infoButton.add(buttonImage)
infoButton.opacity = 0.0
infoButton.center = Point(canvas.center.x, canvas.center.y+190.0)
canvas.add(infoButton)
}
//MARK: -
//MARK: Animations
func createInfoButtonAnimations() {
revealInfoButton = ViewAnimation(duration:0.33) {
self.infoButton?.opacity = 1.0
}
revealInfoButton?.curve = .EaseOut
hideInfoButton = ViewAnimation(duration:0.33) {
self.infoButton?.opacity = 0.0
}
hideInfoButton?.curve = .EaseOut
}
}
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