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Enable or disable the “Add Sensors” button #60
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Based on whether there are unused sensors available for the device.
marcisme
reviewed
Oct 14, 2019
| @@ -429,6 +429,12 @@ extension ActionArea { | |||
| (stackView.arrangedSubviews.count ..< 4).forEach { _ in | |||
| stackView.addArrangedSubview(UIView()) | |||
| } | |||
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| items.forEach { (item) in | |||
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no parens around block args (item and enabled)
| items.forEach { (item) in | ||
| item.enabler?.observe({ (enabled) in | ||
| self.setButtonFor(item: item, enabled: enabled) | ||
| }) |
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Do all the items need to be re-enabled here? It seems like if one were previously disabled, it may not get turned back on after a button change.
| button.isEnabled = enabled | ||
| let updatedAlpha: CGFloat = enabled ? 1.0 : BarViewController.Metrics.Bar.disabledAlpha | ||
| if animated { | ||
| UIView.animate(withDuration: 0.5) { |
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I'd move the animation block up to the VC. It currently controls timings for animations, so it'll be easier to reason about with those in the same place. There's also some logic up there related to enabling/disabling the entire bar/detail era, and the alpha values there and here are likely related.
| @@ -176,6 +176,8 @@ open class ObserveViewController: ScienceJournalCollectionViewController, ChartC | |||
| return self.observeDataSource.availableSensorIDs | |||
| } | |||
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| @objc dynamic private(set) var unusedSensors: Bool = false | |||
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hasUnusedSensors would be more consistent with the property naming guidelines for boolean values.
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Checklist
Motivation and Context
The "Add Sensor" button in the action area remains enabled, even when there are no additional sensors to add. This could be confusing for users. The visual characteristics and interactivity of the "Add Sensor" button should change based on whether there are unused sensors available for the device.
Description
unusedSensorsBooltoObserveViewControllerto store the current state of sensors that are available but not currently in use.enablerproperty toBarButtonItemto handle KVO observations ofBoolproperties.enablerfor the "Add Sensor" bar button item, to observe changes toObserveViewController'sunusedSensorsproperty.setButtonFor(item:enabled:animated:)method to theActionArea.Barto toggle enabled for buttons based on observations received by aBarButtonItem.setEnabled(_:animated:)method on theBarButtonto change the interactivity and alpha of its subviews.Tested in the simulator and on devices running iOS 12 and 13.