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package org.geepawhill.contentment.geometry
import javafx.beans.property.SimpleDoubleProperty
import tornadofx.*
class AspectRatio {
val widthToHeightProperty = SimpleDoubleProperty(16.0 / 9.0)
var widthToHeight by widthToHeightProperty
val hostWidthProperty = SimpleDoubleProperty(0.0)
var hostWidth by hostWidthProperty
val hostHeightProperty = SimpleDoubleProperty(0.0)
var hostHeight by hostHeightProperty
val widthProperty = SimpleDoubleProperty(0.0)
var width by widthProperty
val heightProperty = SimpleDoubleProperty(0.0)
var height by heightProperty
val xProperty = SimpleDoubleProperty(0.0)
var x by xProperty
val yProperty = SimpleDoubleProperty(0.0)
var y by yProperty
init {
hostWidthProperty.addListener { _ -> recalculate() }
hostHeightProperty.addListener { _ -> recalculate() }
widthToHeightProperty.addListener { _ -> recalculate() }
}
private fun recalculate() {
val impliedHeightForWidth = (1.0 / widthToHeight) * hostWidth
if (impliedHeightForWidth < hostHeight) {
width = hostWidth
height = impliedHeightForWidth
} else {
val impliedWidthForHeight = widthToHeight * hostHeight
width = impliedWidthForHeight
height = hostHeight
}
x = (hostWidth - width) / 2.0
y = (hostHeight - height) / 2.0
}
}
package org.geepawhill.contentment.geometry
import org.assertj.core.api.Assertions.assertThat
import org.assertj.core.data.Percentage
import org.junit.jupiter.api.Test
class AspectRatioTest {
private val ratio = AspectRatio()
@Test
fun `defaults to 16 x 9`() {
assertThat(ratio.widthToHeight).isCloseTo(16.0 / 9.0, Percentage.withPercentage(0.01))
}
@Test
fun `exact dimension match`() {
ratio.hostWidth = 1600.0
ratio.hostHeight = 900.0
assertThat(ratio.width).isCloseTo(1600.0, Percentage.withPercentage(0.01))
assertThat(ratio.height).isCloseTo(900.0, Percentage.withPercentage(0.01))
}
@Test
fun `smaller dimension match`() {
ratio.hostWidth = 1280.0
ratio.hostHeight = 720.0
assertThat(ratio.width).isCloseTo(1280.0, Percentage.withPercentage(0.01))
assertThat(ratio.height).isCloseTo(720.0, Percentage.withPercentage(0.01))
}
@Test
fun `larger dimension match`() {
ratio.hostWidth = 1920.0
ratio.hostHeight = 1080.0
assertThat(ratio.width).isCloseTo(1920.0, Percentage.withPercentage(0.01))
assertThat(ratio.height).isCloseTo(1080.0, Percentage.withPercentage(0.01))
}
@Test
fun `not enough width`() {
ratio.hostWidth = 1600.0
ratio.hostHeight = 1080.0
assertThat(ratio.width).isCloseTo(1600.0, Percentage.withPercentage(0.01))
assertThat(ratio.height).isCloseTo(900.0, Percentage.withPercentage(0.01))
assertThat(ratio.y).isCloseTo(90.0, Percentage.withPercentage(0.01))
assertThat(ratio.x).isCloseTo(0.0, Percentage.withPercentage(0.01))
}
@Test
fun `not enough height`() {
ratio.hostWidth = 1920.0
ratio.hostHeight = 720.0
assertThat(ratio.width).isCloseTo(1280.0, Percentage.withPercentage(0.01))
assertThat(ratio.height).isCloseTo(720.0, Percentage.withPercentage(0.01))
assertThat(ratio.y).isCloseTo(0.0, Percentage.withPercentage(0.01))
assertThat(ratio.x).isCloseTo(320.0, Percentage.withPercentage(0.01))
}
@Test
fun `ratio change`() {
ratio.hostWidth = 1600.0
ratio.hostHeight = 1200.0
assertThat(ratio.height).isCloseTo(900.0, Percentage.withPercentage(0.01))
ratio.widthToHeight = 4.0 / 3.0
assertThat(ratio.width).isCloseTo(1600.0, Percentage.withPercentage(0.01))
assertThat(ratio.height).isCloseTo(1200.0, Percentage.withPercentage(0.01))
}
}
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