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Add test_getBackdropAlpha()

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This commit is contained in:
Shin Yamamoto
2019-07-06 16:16:22 +09:00
parent cbcc35268d
commit 75c27bc232
2 changed files with 126 additions and 7 deletions
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Framework/Sources/FloatingPanel.swift
+12 -7
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@@ -142,11 +142,15 @@ class FloatingPanel: NSObject, UIGestureRecognizerDelegate {
self.layoutAdapter.activateLayout(of: target)
}
private func getBackdropAlpha(with translation: CGPoint) -> CGFloat {
let currentY = surfaceView.frame.minY
func getBackdropAlpha(at currentY: CGFloat, with translation: CGPoint) -> CGFloat {
let forwardY = (translation.y >= 0)
let segment = layoutAdapter.segument(at: currentY, forward: forwardY)
let lowerPos = segment.lower ?? layoutAdapter.topMostState
let upperPos = segment.upper ?? layoutAdapter.bottomMostState
let pre = forwardY ? lowerPos : upperPos
let next = forwardY ? upperPos : lowerPos
let next = directionalPosition(at: currentY, with: translation)
let pre = redirectionalPosition(at: currentY, with: translation)
let nextY = layoutAdapter.positionY(for: next)
let preY = layoutAdapter.positionY(for: pre)
@@ -417,17 +421,18 @@ class FloatingPanel: NSObject, UIGestureRecognizerDelegate {
private func panningChange(with translation: CGPoint) {
log.debug("panningChange -- translation = \(translation.y)")
let pre = surfaceView.frame.minY
let preY = surfaceView.frame.minY
let dy = translation.y - initialTranslationY
layoutAdapter.updateInteractiveTopConstraint(diff: dy,
allowsTopBuffer: allowsTopBuffer(for: dy),
with: behavior)
backdropView.alpha = getBackdropAlpha(with: translation)
let currentY = surfaceView.frame.minY
backdropView.alpha = getBackdropAlpha(at: currentY, with: translation)
preserveContentVCLayoutIfNeeded()
let didMove = (pre != surfaceView.frame.minY)
let didMove = (preY != currentY)
guard didMove else { return }
viewcontroller.delegate?.floatingPanelDidMove(viewcontroller)