A virtual trackpad macOS control.
I have a project that needs the ability to change 2-dimension values (x:y or width:height for example). The project has limited UI space so I wanted a control that acted like a trackpad for tweaking a positional value.
- Dark mode support, high contrast support
- Keyboard support (use the arrow keys when the field is focussed)
- Cancelable drags (hit the ESC key during drag)
- shift-drag to temporarily increase the delta values by 10 during the drag (faster tracking)
- option-drag to temporarily decrease the delta values by 10 during the drag (slower tracking)
All properties support Cocoa Bindings.
isEnabled: Whether the control is enabled (Bool)
-
minX: The minimum x-value represented (CGFloat) -
minY: The minimum y-value represented (CGFloat) -
maxX: The maximum x-value represented (CGFloat) -
maxY: The maximum y-value represented (CGFloat) -
deltaX: The dragging x scale factor (CGFloat). The higher the value, the faster the tracking. -
deltaY: The dragging y scale factor (CGFloat). The higher the value, the faster the tracking. -
range: The rectangle representing the draggable range.
position: The current position (CGPoint)x: The current x position (CGFloat)y: The current y position (CGFloat)
The control can report updates via a supplied delegate (DSFDragSliderProtocol)
/// A drag was started at a particular point
@objc func dragSlider(_ dragSlide: DSFDragSlider, didStartDragAtPoint: CGPoint)
/// The position changed for the specified drag slider
@objc func dragSlider(_ dragSlide: DSFDragSlider, didChangePosition: CGPoint)
/// The user cancelled an active drag (using the ESC key)
@objc func dragSlider(_ dragSlide: DSFDragSlider, didCancelDragAtPoint: CGPoint)There is also a SwiftUI wrapper for DSFDragSlider, called DSFDragSliderUI
struct ContentView: View {
// The configuration for the drag slider
var configuration = DragSlider.Configuration(
range: CGRect(x: -100, y: -100, width: 200, height: 200),
deltaX: 1,
deltaY: 1
)
// A dynamically updated position as the user drags the control
@State private var currentPosition = CGPoint(x: 50, y: 50)
@State private var isDisabled = false
var body: some View {
DSFDragSliderUI(
configuration: .constant(configuration),
currentPosition: $position
)
.disabled(self.isDisabled)
}
}
MIT License
Copyright (c) 2020 Darren Ford
Permission is hereby granted, free of charge, to any person obtaining a copy
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