tools.aqua.bgw.components.gamecomponentviews.CardView.kt Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of bgw-core Show documentation
A framework for board game applications.
There is a newer version: 0.5
/*
 *    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.gamecomponentviews

import tools.aqua.bgw.components.gamecomponentviews.CardView.CardSide.BACK
import tools.aqua.bgw.components.gamecomponentviews.CardView.CardSide.FRONT
import tools.aqua.bgw.core.DEFAULT_CARD_HEIGHT
import tools.aqua.bgw.core.DEFAULT_CARD_WIDTH
import tools.aqua.bgw.visual.Visual

/**
 * A [CardView] may be used to visualize a card.
 *
 * You can inherit from this class if you want to add additional functionality or fields.
 * Inheriting does NOT change how a cardView is visualized by the BGW framework.
 *
 * Visualization:
 *
 * The [Visual] at the [currentSide] value is used to visualize the card. By default, the back side is shown.
 *
 * @constructor Creates a [CardView] with given [Visual]s.
 *
 * @param posX Horizontal coordinate for this [CardView]. Default: 0.
 * @param posY Vertical coordinate for this [CardView]. Default: 0.
 * @param width Width for this [CardView]. Default: [DEFAULT_CARD_WIDTH].
 * @param height Height for this [CardView]. Default: [DEFAULT_CARD_HEIGHT].
 * @param front Visual to represent the front side of the card.
 * @param back Visual to represent the back side of the card. Default: same [Visual] as front.
 */
open class CardView(
	posX: Number = 0,
	posY: Number = 0,
	width: Number = DEFAULT_CARD_WIDTH,
	height: Number = DEFAULT_CARD_HEIGHT,
	front: Visual,
	back: Visual = front
) : GameComponentView(posX = posX, posY = posY, width = width, height = height, visual = Visual.EMPTY) {
	/**
	 * The current [CardSide] that is displayed.
	 *
	 * @see showFront
	 * @see showBack
	 */
	var currentSide: CardSide = FRONT
		set(value) {
			if (field != value) {
				field = value

				visualProperty.value = if (value == FRONT)
					frontVisual
				else
					backVisual
			}
		}

	/**
	 * Front [Visual] for this [CardView].
	 */
	var frontVisual: Visual = Visual.EMPTY
		/**
		 * Sets front [Visual] for this [CardView] as a copy of given [value].
		 */
		set(value) {
			field = value.copy()

			if (currentSide == FRONT)
				super.visual = field
		}

	/**
	 * Back [Visual] for this [CardView].
	 */
	var backVisual: Visual = Visual.EMPTY
		/**
		 * Sets back [Visual] for this [CardView] as a copy of given [value].
		 */
		set(value) {
			field = value.copy()

			if (currentSide == BACK)
				super.visual = field
		}
	
	override var visual: Visual
		get() = super.visual
		set(_) {
			throw UnsupportedOperationException("Setting a single Visual for a CardView is not supported. " +
						"Use `frontVisual` and `backVisual` setter instead.")
		}
	
	init {
		this.frontVisual = front
		this.backVisual = back
		this.currentSide = BACK
	}

	/**
	 * Sets the [currentSide] to be displayed to [CardSide.FRONT].
	 */
	fun showFront() {
		currentSide = FRONT
	}

	/**
	 * Sets the [currentSide] to be displayed to [CardSide.BACK].
	 */
	fun showBack() {
		currentSide = BACK
	}

	/**
	 * Sets the [currentSide] to the parameter value.
	 */
	fun showCardSide(side: CardSide) {
		currentSide = side
	}

	/**
	 * Enum for the card sides [FRONT] and [BACK] with their visual indices.
	 */
	enum class CardSide {
		/**
		 * The [FRONT] side.
		 */
		FRONT,

		/**
		 * The [BACK] side.
		 */
		BACK
	}
}