63 lines
1.6 KiB
Kotlin
63 lines
1.6 KiB
Kotlin
package net.shadowfacts.cacao
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import net.shadowfacts.cacao.geometry.Point
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import net.shadowfacts.cacao.view.View
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import no.birkett.kiwi.Solver
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import java.util.*
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/**
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* A Window is the object at the top of a Cacao view hierarchy. It occupies the entirety of the Minecraft screen size
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* and provides the base coordinate system for its view hierarchy.
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*
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* The Window owns the Kiwi [Solver] object used for layout by all of its views.
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*
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* @author shadowfacts
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*/
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class Window {
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var solver = Solver()
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// _views is the internal, mutable object, since we only want it to be mutated by the add/removeView methods
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private val _views = LinkedList<View>()
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/**
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* The list of top-level views in this window.
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* This list should never be modified directly, only by calling the [addView]/[removeView] methods.
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*/
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val views: List<View> = _views
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/**
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* Adds the given view as a top-level view in this window.
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*
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* @param view The view to add.
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* @return The same view, as a convenience.
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*/
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fun <T: View> addView(view: T): T {
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_views.add(view)
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view.solver = solver
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view.wasAdded()
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return view
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}
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/**
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* Instructs the solver to solve all of the provided constraints.
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* Should be called after the view hierarchy is setup.
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*/
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fun layout() {
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solver.updateVariables()
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views.forEach(View::didLayout)
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}
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/**
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* Draws this window and all of its views.
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* This method is called by [CacaoScreen] and generally shouldn't be called directly.
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*
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* @param mouse The point in the coordinate system of the window.
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* @param delta The time elapsed since the last frame.
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*/
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fun draw(mouse: Point, delta: Float) {
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views.forEach(View::draw)
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}
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} |