mirror of https://github.com/oxen-io/session-ios
Pan horizontal to bulk select images
Michael Kirk
6 years ago
parent
3ac9732b65
commit
599a57e3a4
@ -1,68 +0,0 @@
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//
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// Copyright (c) 2018 Open Whisper Systems. All rights reserved.
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//
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import UIKit.UIGestureRecognizerSubclass
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@objc
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enum PanDirection: Int {
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case left, right, up, down, any
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}
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@objc
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class PanDirectionGestureRecognizer: UIPanGestureRecognizer {
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let direction: PanDirection
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@objc init(direction: PanDirection, target: AnyObject, action: Selector) {
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self.direction = direction
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super.init(target: target, action: action)
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}
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override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent) {
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// Only start gesture if it's initially in the specified direction.
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if state == .possible {
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guard let touch = touches.first else {
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return
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}
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let previousLocation = touch.previousLocation(in: view)
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let location = touch.location(in: view)
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let deltaY = previousLocation.y - location.y
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let deltaX = previousLocation.x - location.x
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switch direction {
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case .up where deltaY > 0:
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return
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case .down where deltaY < 0:
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return
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case .left where deltaX > 0:
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return
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case .right where deltaX < 0:
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return
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default:
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break
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}
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}
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// Gesture was already started, or in the correct direction.
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super.touchesMoved(touches, with: event)
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if state == .began {
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let vel = velocity(in: view)
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switch direction {
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case .left, .right:
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if fabs(vel.y) > fabs(vel.x) {
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state = .cancelled
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}
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case .up, .down:
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if fabs(vel.x) > fabs(vel.y) {
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state = .cancelled
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}
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default:
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break
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}
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}
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}
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}
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@ -0,0 +1,91 @@
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//
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// Copyright (c) 2019 Open Whisper Systems. All rights reserved.
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//
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import UIKit.UIGestureRecognizerSubclass
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public struct PanDirection: OptionSet {
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public let rawValue: Int
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public init(rawValue: Int) {
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self.rawValue = rawValue
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}
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public static let left = PanDirection(rawValue: 1 << 0)
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public static let right = PanDirection(rawValue: 1 << 1)
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public static let up = PanDirection(rawValue: 1 << 2)
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public static let down = PanDirection(rawValue: 1 << 3)
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public static let horizontal: PanDirection = [.left, .right]
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public static let vertical: PanDirection = [.up, .down]
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public static let any: PanDirection = [.left, .right, .up, .down]
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}
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public class DirectionalPanGestureRecognizer: UIPanGestureRecognizer {
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let direction: PanDirection
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public init(direction: PanDirection, target: AnyObject, action: Selector) {
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self.direction = direction
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super.init(target: target, action: action)
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}
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override public func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent) {
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// Only start gesture if it's initially in the specified direction.
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if state == .possible {
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guard let touch = touches.first else {
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return
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}
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let previousLocation = touch.previousLocation(in: view)
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let location = touch.location(in: view)
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let deltaY = previousLocation.y - location.y
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let deltaX = previousLocation.x - location.x
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let isSatisified: Bool = {
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if abs(deltaY) > abs(deltaX) {
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if direction.contains(.up) && deltaY < 0 {
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return true
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}
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if direction.contains(.down) && deltaY > 0 {
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return true
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}
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} else {
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if direction.contains(.left) && deltaX < 0 {
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return true
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}
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if direction.contains(.right) && deltaX > 0 {
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return true
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}
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}
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return false
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}()
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guard isSatisified else {
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return
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}
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}
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// Gesture was already started, or in the correct direction.
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super.touchesMoved(touches, with: event)
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if state == .began {
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let vel = velocity(in: view)
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switch direction {
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case .left, .right:
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if fabs(vel.y) > fabs(vel.x) {
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state = .cancelled
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}
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case .up, .down:
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if fabs(vel.x) > fabs(vel.y) {
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state = .cancelled
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}
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default:
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break
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}
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}
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}
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}
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