122 lines
3.1 KiB
Swift
122 lines
3.1 KiB
Swift
// 7 august 2015
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import Cocoa
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struct BoxControl {
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var c: Control
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var stretchy: Bool
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var horzHuggingPri: NSLayoutPriority
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var vertHuggingPri: NSLayoutPriority
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}
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class Box : NSView, Control {
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private var controls: [BoxControl]
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private var parent: Control?
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private var vertical: Bool
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private var padded: Bool
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private var primaryDirPrefix: String
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private var secondaryDirPrefix: String
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private var primaryOrientation: NSLayoutConstraintOrientation
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private var secondaryOrientation: NSLayoutConstraintOrientation
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init(vertical: Bool, padded: Bool) {
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self.controls = []
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self.parent = nil
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self.vertical = vertical
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self.padded = padded
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self.primaryDirPrefix = "H:"
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self.secondaryDirPrefix = "V:"
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self.primaryOrientation = NSLayoutConstraintOrientation.Horizontal
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self.secondaryOrientation = NSLayoutConstraintOrientation.Vertical
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if self.vertical {
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self.primaryDirPrefix = "V:"
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self.secondaryDirPrefix = "H:"
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self.primaryOrientation = NSLayoutConstraintOrientation.Vertical
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self.secondaryOrientation = NSLayoutConstraintOrientation.Horizontal
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}
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super.init(frame: NSZeroRect)
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self.translatesAutoresizingMaskIntoConstraints = false
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}
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required init?(coder: NSCoder) {
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fatalError("can't use this constructor, sorry")
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}
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func Add(control: Control, _ stretchy: Bool) {
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var c: BoxControl
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var view = control.View()
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c = BoxControl(
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c: control,
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stretchy: stretchy,
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horzHuggingPri: horzHuggingPri(view),
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vertHuggingPri: vertHuggingPri(view))
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self.addSubview(view)
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self.controls.append(c)
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// if a control is stretchy, it should not hug in the primary direction
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// otherwise, it should *forcibly* hug
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if c.stretchy {
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setHuggingPri(view, myNSLayoutPriorityDefaultLow, self.primaryOrientation)
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} else {
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setHuggingPri(view, myNSLayoutPriorityRequired, self.primaryOrientation)
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}
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// make sure controls don't hug their secondary direction so they fill the width of the view
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setHuggingPri(view, myNSLayoutPriorityDefaultLow, self.secondaryOrientation)
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self.relayout()
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}
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func View() -> NSView {
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return self
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}
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func SetParent(p: Control) {
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self.parent = p
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}
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// TODO stretchiness
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// - we will need a trailing view if there are no stretchy controls
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private func relayout() {
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var constraint: String
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if self.controls.count == 0 {
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return
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}
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self.removeConstraints(self.constraints)
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// first collect the views
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var views = [String: NSView]()
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var n = 0
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for c in self.controls {
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views["view\(n)"] = c.c.View()
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n++
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}
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// next, assemble the views in the primary direction
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// they all go in a straight line
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constraint = "\(self.primaryDirPrefix)|"
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for i in 0..<n {
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if self.padded && i != 0 {
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constraint += "-"
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}
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constraint += "[view\(i)]"
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}
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constraint += "|"
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var constraints = mkconstraints(constraint, views)
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self.addConstraints(constraints)
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// next: assemble the views in the secondary direction
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// each of them will span the secondary direction
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for i in 0..<n {
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constraint = "\(self.secondaryDirPrefix)|[view\(i)]|"
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var constraints = mkconstraints(constraint, views)
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self.addConstraints(constraints)
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}
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}
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}
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