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feat: drag-and-drop files on the ui (closes #74)
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louis.pontoise
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Feb 10, 2020
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170 changes: 170 additions & 0 deletions
170
alt-tab-macos/ui/main-window/CollectionViewItemView.swift
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,170 @@ | ||
| import Cocoa | ||
|
|
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| class CollectionViewItemView: NSView { | ||
| var window_: Window? | ||
| var thumbnail = NSImageView() | ||
| var appIcon = NSImageView() | ||
| var label = CellTitle(Preferences.fontHeight) | ||
| var minimizedIcon = FontIcon(FontIcon.sfSymbolCircledMinusSign, Preferences.fontIconSize, .white) | ||
| var hiddenIcon = FontIcon(FontIcon.sfSymbolCircledDotSign, Preferences.fontIconSize, .white) | ||
| var spaceIcon = FontIcon(FontIcon.sfSymbolCircledNumber0, Preferences.fontIconSize, .white) | ||
| var mouseDownCallback: MouseDownCallback! | ||
| var mouseMovedCallback: MouseMovedCallback! | ||
| var dragAndDropTimer: Timer? | ||
|
|
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| convenience init() { | ||
| self.init(frame: .zero) | ||
| let hStackView = makeHStackView() | ||
| let vStackView = makeVStackView(hStackView) | ||
| let shadow = CollectionViewItemView.makeShadow(.gray) | ||
| thumbnail.shadow = shadow | ||
| appIcon.shadow = shadow | ||
| observeDragAndDrop() | ||
| subviews.append(vStackView) | ||
| } | ||
|
|
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| private func observeDragAndDrop() { | ||
| // NSImageView instances are registered to drag-and-drop by default | ||
| thumbnail.unregisterDraggedTypes() | ||
| appIcon.unregisterDraggedTypes() | ||
| // we only handle URLs (i.e. not text, image, or other draggable things) | ||
| registerForDraggedTypes([NSPasteboard.PasteboardType(kUTTypeURL as String)]) | ||
| } | ||
|
|
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| override func draggingUpdated(_ sender: NSDraggingInfo) -> NSDragOperation { | ||
| mouseMovedCallback() | ||
| return .link | ||
| } | ||
|
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| override func draggingEntered(_ sender: NSDraggingInfo) -> NSDragOperation { | ||
| dragAndDropTimer = Timer.scheduledTimer(withTimeInterval: 2, repeats: false, block: { _ in | ||
| self.mouseDownCallback() | ||
| }) | ||
| return .link | ||
| } | ||
|
|
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| override func draggingExited(_ sender: NSDraggingInfo?) { | ||
| dragAndDropTimer?.invalidate() | ||
| dragAndDropTimer = nil | ||
| } | ||
|
|
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| override func performDragOperation(_ sender: NSDraggingInfo) -> Bool { | ||
| let urls = sender.draggingPasteboard.readObjects(forClasses: [NSURL.self]) as! [URL] | ||
| let appUrl = window_!.application.runningApplication.bundleURL! | ||
| let open = try? NSWorkspace.shared.open(urls, withApplicationAt: appUrl, options: [], configuration: [:]) | ||
| (App.shared as! App).hideUi() | ||
| return open != nil | ||
| } | ||
|
|
||
| override func mouseMoved(with event: NSEvent) { | ||
| mouseMovedCallback() | ||
| } | ||
|
|
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| override func mouseDown(with theEvent: NSEvent) { | ||
| mouseDownCallback() | ||
| } | ||
|
|
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| func updateRecycledCellWithNewContent(_ element: Window, _ mouseDownCallback: @escaping MouseDownCallback, _ mouseMovedCallback: @escaping MouseMovedCallback, _ screen: NSScreen) { | ||
| window_ = element | ||
| thumbnail.image = element.thumbnail | ||
| let (thumbnailWidth, thumbnailHeight) = CollectionViewItemView.thumbnailSize(element.thumbnail, screen) | ||
| let thumbnailSize = NSSize(width: thumbnailWidth.rounded(), height: thumbnailHeight.rounded()) | ||
| thumbnail.image?.size = thumbnailSize | ||
| thumbnail.frame.size = thumbnailSize | ||
| appIcon.image = element.icon | ||
| let appIconSize = NSSize(width: Preferences.iconSize, height: Preferences.iconSize) | ||
| appIcon.image?.size = appIconSize | ||
| appIcon.frame.size = appIconSize | ||
| label.string = element.title | ||
| // workaround: setting string on NSTextView change the font (most likely a Cocoa bug) | ||
| label.font = Preferences.font | ||
| hiddenIcon.isHidden = !window_!.isHidden | ||
| minimizedIcon.isHidden = !window_!.isMinimized | ||
| spaceIcon.isHidden = element.spaceIndex == nil || Spaces.isSingleSpace || Preferences.hideSpaceNumberLabels | ||
| if !spaceIcon.isHidden { | ||
| if element.isOnAllSpaces { | ||
| spaceIcon.setStar() | ||
| } else { | ||
| spaceIcon.setNumber(UInt32(element.spaceIndex!)) | ||
| } | ||
| } | ||
| let fontIconWidth = CGFloat([minimizedIcon, hiddenIcon, spaceIcon].filter { !$0.isHidden }.count) * (Preferences.fontIconSize + Preferences.intraCellPadding) | ||
| label.textContainer!.size.width = frame.width - Preferences.iconSize - Preferences.intraCellPadding * 3 - fontIconWidth | ||
| subviews.first!.frame.size = frame.size | ||
| self.mouseDownCallback = mouseDownCallback | ||
| self.mouseMovedCallback = mouseMovedCallback | ||
| if trackingAreas.count > 0 { | ||
| removeTrackingArea(trackingAreas[0]) | ||
| } | ||
| addTrackingArea(NSTrackingArea(rect: bounds, options: [.mouseMoved, .activeAlways], owner: self, userInfo: nil)) | ||
| } | ||
|
|
||
| static func makeShadow(_ color: NSColor) -> NSShadow { | ||
| let shadow = NSShadow() | ||
| shadow.shadowColor = color | ||
| shadow.shadowOffset = .zero | ||
| shadow.shadowBlurRadius = 1 | ||
| return shadow | ||
| } | ||
|
|
||
| static func downscaleFactor() -> CGFloat { | ||
| let nCellsBeforePotentialOverflow = Preferences.minRows * Preferences.minCellsPerRow | ||
| guard CGFloat(Windows.list.count) > nCellsBeforePotentialOverflow else { return 1 } | ||
| // TODO: replace this buggy heuristic with a correct implementation of downscaling | ||
| return nCellsBeforePotentialOverflow / (nCellsBeforePotentialOverflow + (sqrt(CGFloat(Windows.list.count) - nCellsBeforePotentialOverflow) * 2)) | ||
| } | ||
|
|
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| static func widthMax(_ screen: NSScreen) -> CGFloat { | ||
| return (ThumbnailsPanel.widthMax(screen) / Preferences.minCellsPerRow - Preferences.interCellPadding) * CollectionViewItemView.downscaleFactor() | ||
| } | ||
|
|
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| static func widthMin(_ screen: NSScreen) -> CGFloat { | ||
| return (ThumbnailsPanel.widthMax(screen) / Preferences.maxCellsPerRow - Preferences.interCellPadding) * CollectionViewItemView.downscaleFactor() | ||
| } | ||
|
|
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| static func height(_ screen: NSScreen) -> CGFloat { | ||
| return (ThumbnailsPanel.heightMax(screen) / Preferences.minRows - Preferences.interCellPadding) * CollectionViewItemView.downscaleFactor() | ||
| } | ||
|
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||
| static func width(_ image: NSImage?, _ screen: NSScreen) -> CGFloat { | ||
| return max(thumbnailSize(image, screen).0 + Preferences.intraCellPadding * 2, CollectionViewItemView.widthMin(screen)) | ||
| } | ||
|
|
||
| static func thumbnailSize(_ image: NSImage?, _ screen: NSScreen) -> (CGFloat, CGFloat) { | ||
| guard let image = image else { return (0, 0) } | ||
| let thumbnailHeightMax = CollectionViewItemView.height(screen) - Preferences.intraCellPadding * 3 - Preferences.iconSize | ||
| let thumbnailWidthMax = CollectionViewItemView.widthMax(screen) - Preferences.intraCellPadding * 2 | ||
| let thumbnailHeight = min(image.size.height, thumbnailHeightMax) | ||
| let thumbnailWidth = min(image.size.width, thumbnailWidthMax) | ||
| let imageRatio = image.size.width / image.size.height | ||
| let thumbnailRatio = thumbnailWidth / thumbnailHeight | ||
| if thumbnailRatio > imageRatio { | ||
| return (image.size.width * thumbnailHeight / image.size.height, thumbnailHeight) | ||
| } | ||
| return (thumbnailWidth, image.size.height * thumbnailWidth / image.size.width) | ||
| } | ||
|
|
||
| private func makeHStackView() -> NSStackView { | ||
| let hStackView = NSStackView() | ||
| hStackView.spacing = Preferences.intraCellPadding | ||
| hStackView.setViews([appIcon, label, hiddenIcon, minimizedIcon, spaceIcon], in: .leading) | ||
| return hStackView | ||
| } | ||
|
|
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| private func makeVStackView(_ hStackView: NSStackView) -> NSStackView { | ||
| let vStackView = NSStackView() | ||
| vStackView.wantsLayer = true | ||
| vStackView.layer!.backgroundColor = .clear | ||
| vStackView.layer!.cornerRadius = Preferences.cellCornerRadius | ||
| vStackView.layer!.borderWidth = Preferences.cellBorderWidth | ||
| vStackView.layer!.borderColor = .clear | ||
| vStackView.edgeInsets = NSEdgeInsets(top: Preferences.intraCellPadding, left: Preferences.intraCellPadding, bottom: Preferences.intraCellPadding, right: Preferences.intraCellPadding) | ||
| vStackView.orientation = .vertical | ||
| vStackView.spacing = Preferences.intraCellPadding | ||
| vStackView.setViews([hStackView, thumbnail], in: .leading) | ||
| return vStackView | ||
| } | ||
| } | ||
|
|
||
| typealias MouseDownCallback = () -> Void | ||
| typealias MouseMovedCallback = () -> Void |
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