79 lines
2.1 KiB
Kotlin
79 lines
2.1 KiB
Kotlin
package net.shadowfacts.shadowui
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import com.mojang.blaze3d.platform.GlStateManager
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import net.shadowfacts.kiwidsl.dsl
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import net.shadowfacts.shadowui.geometry.UIRect
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import net.shadowfacts.shadowui.util.Color
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import net.shadowfacts.shadowui.util.RenderHelper
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import no.birkett.kiwi.Solver
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class UIView {
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lateinit var solver: Solver
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// in the coordinate system of the screen
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val leftAnchor = LayoutVariable(this, "left")
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val rightAnchor = LayoutVariable(this, "right")
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val topAnchor = LayoutVariable(this, "top")
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val bottomAnchor = LayoutVariable(this, "bottom")
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val widthAnchor = LayoutVariable(this, "width")
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val heightAnchor = LayoutVariable(this, "height")
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val centerXAnchor = LayoutVariable(this, "centerX")
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val centerYAnchor = LayoutVariable(this, "centerY")
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// The rectangle for this view in the coordinate system of the parent view.
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lateinit var frame: UIRect
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// The rectangle for this view in its own coordinate system.
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lateinit var bounds: UIRect
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var backgroundColor = Color(0xff0000)
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var parent: UIView? = null
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val subviews = mutableListOf<UIView>()
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fun addSubview(view: UIView) {
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subviews.add(view)
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view.parent = this
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view.solver = solver
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view.wasAdded()
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}
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fun wasAdded() {
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createInternalConstraints()
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}
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fun createInternalConstraints() {
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solver.dsl {
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rightAnchor equalTo (leftAnchor + widthAnchor)
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bottomAnchor equalTo (topAnchor + heightAnchor)
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centerXAnchor equalTo (leftAnchor + widthAnchor / 2)
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centerYAnchor equalTo (topAnchor + heightAnchor / 2)
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}
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}
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fun didLayout() {
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subviews.forEach(UIView::didLayout)
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val parentLeft = parent?.leftAnchor?.value ?: 0.0
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val parentTop = parent?.topAnchor?.value ?: 0.0
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frame = UIRect(leftAnchor.value - parentLeft, topAnchor.value - parentTop, widthAnchor.value, heightAnchor.value)
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bounds = UIRect(0.0, 0.0, widthAnchor.value, heightAnchor.value)
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}
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fun draw() {
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GlStateManager.pushMatrix()
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GlStateManager.translated(frame.left, frame.top, 0.0)
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RenderHelper.fill(bounds, backgroundColor)
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drawContent()
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subviews.forEach(UIView::draw)
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GlStateManager.popMatrix()
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}
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fun drawContent() {}
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} |