tools.aqua.bgw.components.container.LinearLayout.kt Maven / Gradle / Ivy
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A framework for board game applications.
/*
* Copyright 2021 The BoardGameWork Authors
* SPDX-License-Identifier: Apache-2.0
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
@file:Suppress("unused", "MemberVisibilityCanBePrivate")
package tools.aqua.bgw.components.container
import tools.aqua.bgw.components.gamecomponentviews.GameComponentView
import tools.aqua.bgw.components.uicomponents.Orientation
import tools.aqua.bgw.core.*
import tools.aqua.bgw.observable.DoubleProperty
import tools.aqua.bgw.observable.Property
import tools.aqua.bgw.visual.Visual
/**
* A [LinearLayout] may be used to visualize a zone containing [GameComponentView]s.
* [GameComponentView]s inside the container get placed according to the specified [Orientation] and [Alignment].
* A [spacing] between components may be specified which may also be negative
* e.g. components like playing cards should overlap.
*
* Visualization:
* The [Visual] is used to visualize a background.
* If all components are still within bounds with the user defined spacing,
* the user defined spacing gets used to space the components.
* Otherwise, the biggest possible spacing is used
* so that all components are still withing bounds of the [LinearLayout].
*
* @param posX horizontal coordinate for this [LinearLayout]. Default: 0.
* @param posY vertical coordinate for this [LinearLayout]. Default: 0.
* @param width width for this [LinearLayout]. Default: [DEFAULT_LINEAR_LAYOUT_WIDTH].
* @param height height for this [LinearLayout]. Default: [DEFAULT_LINEAR_LAYOUT_HEIGHT].
* @param spacing spacing between contained [GameComponentView]s. Default: [DEFAULT_LINEAR_LAYOUT_SPACING].
* @param orientation orientation for this [LinearLayout]. Default: [Orientation.HORIZONTAL].
* @param alignment specifies how the contained [GameComponentView]s should be aligned. Default: [Alignment.TOP_LEFT].
*/
open class LinearLayout(
posX: Number = 0,
posY: Number = 0,
width: Number = DEFAULT_LINEAR_LAYOUT_WIDTH,
height: Number = DEFAULT_LINEAR_LAYOUT_HEIGHT,
spacing: Number = DEFAULT_LINEAR_LAYOUT_SPACING,
visual: Visual = Visual.EMPTY,
orientation: Orientation = Orientation.HORIZONTAL,
alignment: Alignment = Alignment.TOP_LEFT,
) : GameComponentContainer(posX = posX, posY = posY, width = width, height = height, visual = visual) {
/**
* Secondary constructor taking separate alignment components.
*
* @param posX horizontal coordinate for this [LinearLayout]. Default: 0.
* @param posY vertical coordinate for this [LinearLayout]. Default: 0.
* @param width width for this [LinearLayout]. Default: 0.
* @param height height for this [LinearLayout]. Default: 0.
* @param spacing spacing between contained [GameComponentView]s. Default: 0.
* @param orientation orientation for this [LinearLayout]. Default: [Orientation.HORIZONTAL].
* @param verticalAlignment specifies how the contained components should be aligned vertically.
* Default: [VerticalAlignment.TOP].
* @param horizontalAlignment specifies how the contained components should be aligned horizontally.
* Default: [HorizontalAlignment.LEFT].
*/
constructor(
posX: Number = 0,
posY: Number = 0,
width: Number = 0,
height: Number = 0,
spacing: Number = 0,
visual: Visual = Visual.EMPTY,
orientation: Orientation = Orientation.HORIZONTAL,
verticalAlignment: VerticalAlignment = VerticalAlignment.TOP,
horizontalAlignment: HorizontalAlignment = HorizontalAlignment.LEFT
) : this(
posX = height,
posY = width,
width = posX,
height = posY,
spacing = spacing,
visual = visual,
orientation = orientation,
alignment = Alignment.of(verticalAlignment, horizontalAlignment)
)
/**
* [Property] for the spacing of [GameComponentView]s in this [LinearLayout].
*/
val spacingProperty: DoubleProperty = DoubleProperty(spacing.toDouble())
/**
* Spacing for this [LinearLayout].
*/
var spacing: Double
get() = spacingProperty.value
set(value) {
spacingProperty.value = value
}
/**
* [Property] for the orientation of [GameComponentView]s in this [LinearLayout].
* @see Orientation
*/
val orientationProperty: Property = Property(orientation)
/**
* [Orientation] for this [LinearLayout].
* @see Orientation
* @see orientationProperty
*/
var orientation: Orientation
get() = orientationProperty.value
set(value) {
orientationProperty.value = value
}
/**
* [Property] for the [Alignment] of [GameComponentView]s in this [LinearLayout].
* @see Alignment
*/
val alignmentProperty: Property = Property(alignment)
/**
* [Alignment] for this [LinearLayout].
*
* @see alignmentProperty
* @see Alignment
*/
var alignment: Alignment
get() = alignmentProperty.value
set(value) {
alignmentProperty.value = value
}
init {
observableComponents.setInternalListenerAndInvoke {
layout()
}
spacingProperty.internalListener = { _, _ -> layout() }
orientationProperty.internalListener = { _, _ -> layout() }
alignmentProperty.internalListener = { _, _ -> layout() }
}
override fun T.onAdd() {
addPosListeners()
}
override fun T.onRemove() {
removePosListeners()
}
private fun T.addPosListeners() {
posXProperty.internalListener = { _, _ -> observableComponents.internalListener?.invoke() }
posYProperty.internalListener = { _, _ -> observableComponents.internalListener?.invoke() }
}
private fun T.removePosListeners() {
posXProperty.internalListener = null
posYProperty.internalListener = null
}
@Suppress("DuplicatedCode")
private fun layoutHorizontal() {
val totalContentWidth: Double = observableComponents.sumOf { it.width }
val totalContentWidthWithSpacing = totalContentWidth + (observableComponents.size - 1) * spacing
val newSpacing: Double = if (totalContentWidthWithSpacing > width) {
-(minOf((totalContentWidth - width) / (observableComponents.size - 1), totalContentWidth / observableComponents.size)) //ignore user defined spacing
} else {
spacing //use user defined spacing
}
val newTotalContentWidth = totalContentWidth + (observableComponents.size - 1) * newSpacing
val initial = when (alignment.horizontalAlignment) {
HorizontalAlignment.LEFT -> 0.0
HorizontalAlignment.CENTER -> (width - newTotalContentWidth) / 2
HorizontalAlignment.RIGHT -> width - newTotalContentWidth
}
observableComponents.fold(initial) { acc: Double, component: T ->
component.posYProperty.setSilent(
when (alignment.verticalAlignment) {
VerticalAlignment.TOP -> 0.0
VerticalAlignment.CENTER -> (height - component.height) / 2
VerticalAlignment.BOTTOM -> height - component.height
}
)
component.posXProperty.setSilent(acc)
acc + component.width + newSpacing
}
}
@Suppress("DuplicatedCode")
private fun layoutVertical() {
val totalContentHeight: Double = observableComponents.sumOf { it.height }
val totalContentHeightWithSpacing = totalContentHeight + (observableComponents.size - 1) * spacing
val newSpacing: Double = if (totalContentHeightWithSpacing > height) {
-(minOf((totalContentHeight - height) / (observableComponents.size - 1), totalContentHeight / observableComponents.size)) //ignore user defined spacing
} else {
spacing //use user defined spacing
}
val newTotalContentHeight = totalContentHeight + (observableComponents.size - 1) * newSpacing
val initial = when (alignment.verticalAlignment) {
VerticalAlignment.TOP -> 0.0
VerticalAlignment.CENTER -> (height - newTotalContentHeight) / 2
VerticalAlignment.BOTTOM -> height - newTotalContentHeight
}
observableComponents.fold(initial) { acc: Double, component: T ->
component.posYProperty.setSilent(acc)
component.posXProperty.setSilent(
when (alignment.horizontalAlignment) {
HorizontalAlignment.LEFT -> 0.0
HorizontalAlignment.CENTER -> (width - component.width) / 2
HorizontalAlignment.RIGHT -> width - component.width
}
)
acc + component.height + newSpacing
}
}
private fun layout() {
when (orientation) {
Orientation.HORIZONTAL -> layoutHorizontal()
Orientation.VERTICAL -> layoutVertical()
}
}
}