123 lines
3.9 KiB
Swift
123 lines
3.9 KiB
Swift
import AppKit
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final class OverlayWindow: NSPanel {
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init(screen: NSScreen, onComplete: @escaping (NSRect) -> Void, onCancel: @escaping () -> Void) {
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let content = OverlayView(onComplete: onComplete, onCancel: onCancel)
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super.init(
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contentRect: screen.frame,
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styleMask: [.borderless, .nonactivatingPanel],
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backing: .buffered,
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defer: false
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)
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contentView = content
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level = .screenSaver
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collectionBehavior = [.canJoinAllSpaces, .fullScreenAuxiliary, .stationary, .transient]
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backgroundColor = .clear
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isOpaque = false
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hasShadow = false
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isReleasedWhenClosed = false
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acceptsMouseMovedEvents = true
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}
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override var canBecomeKey: Bool { true }
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}
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final class OverlayView: NSView {
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private let onComplete: (NSRect) -> Void
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private let onCancel: () -> Void
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private var startPoint: NSPoint?
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private(set) var selection: NSRect?
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init(onComplete: @escaping (NSRect) -> Void, onCancel: @escaping () -> Void) {
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self.onComplete = onComplete
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self.onCancel = onCancel
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super.init(frame: .zero)
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}
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required init?(coder: NSCoder) {
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fatalError("init(coder:) has not been implemented")
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}
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override var acceptsFirstResponder: Bool { true }
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override func acceptsFirstMouse(for event: NSEvent?) -> Bool { true }
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override func resetCursorRects() {
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addCursorRect(bounds, cursor: .crosshair)
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}
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override func mouseDown(with event: NSEvent) {
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let p = convert(event.locationInWindow, from: nil)
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startPoint = p
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selection = NSRect(origin: p, size: .zero)
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needsDisplay = true
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}
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override func mouseDragged(with event: NSEvent) {
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guard let start = startPoint else { return }
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let p = convert(event.locationInWindow, from: nil)
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selection = NSRect(
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x: min(start.x, p.x),
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y: min(start.y, p.y),
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width: abs(p.x - start.x),
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height: abs(p.y - start.y)
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)
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needsDisplay = true
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}
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override func mouseUp(with event: NSEvent) {
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guard let sel = selection else { return }
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if sel.width >= 2, sel.height >= 2 {
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onComplete(window!.convertToScreen(sel))
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} else {
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onCancel()
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}
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}
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override func keyDown(with event: NSEvent) {
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if event.keyCode == 53 {
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onCancel()
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} else {
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super.keyDown(with: event)
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}
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}
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override func draw(_ dirtyRect: NSRect) {
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NSColor.black.withAlphaComponent(0.35).setFill()
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NSBezierPath(rect: bounds).fill()
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guard let sel = selection, sel.width > 0, sel.height > 0 else { return }
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NSGraphicsContext.current?.saveGraphicsState()
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NSGraphicsContext.current?.compositingOperation = .clear
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NSColor.black.setFill()
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NSBezierPath(rect: sel).fill()
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NSGraphicsContext.current?.restoreGraphicsState()
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let border = NSBezierPath(rect: sel)
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border.lineWidth = 1.5
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NSColor.systemOrange.setStroke()
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border.stroke()
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let label = "\(Int(sel.width)) × \(Int(sel.height))"
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let attrs: [NSAttributedString.Key: Any] = [
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.font: NSFont.monospacedDigitSystemFont(ofSize: 12, weight: .medium),
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.foregroundColor: NSColor.white,
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]
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let labelSize = label.size(withAttributes: attrs)
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let labelRect = NSRect(
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x: sel.maxX - labelSize.width - 8,
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y: sel.minY - labelSize.height - 10,
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width: labelSize.width + 8,
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height: labelSize.height + 6
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)
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NSColor.black.withAlphaComponent(0.6).setFill()
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NSBezierPath(roundedRect: labelRect, xRadius: 4, yRadius: 4).fill()
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label.draw(
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at: NSPoint(x: labelRect.minX + 4, y: labelRect.minY + 3),
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withAttributes: attrs
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)
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}
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}
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