feat(renderer): add ScrollArea component for enhanced scrolling functionality
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extio-de
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package de.extio.game_engine.renderer.container;
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import java.util.HashSet;
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import java.util.Objects;
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import java.util.Set;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.springframework.context.annotation.Scope;
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import org.springframework.stereotype.Component;
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import de.extio.game_engine.event.EventService;
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import de.extio.game_engine.module.ModuleService;
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import de.extio.game_engine.renderer.RendererControl;
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import de.extio.game_engine.renderer.g2d.control.G2DDrawControl;
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import de.extio.game_engine.renderer.model.RenderingBo;
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import de.extio.game_engine.renderer.model.RenderingBoHasDimension;
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import de.extio.game_engine.renderer.model.RenderingBoLayer;
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import de.extio.game_engine.renderer.model.bo.ControlRenderingBo;
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import de.extio.game_engine.renderer.model.bo.ControlRenderingBo.SliderControl;
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import de.extio.game_engine.renderer.model.color.RgbaColor;
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import de.extio.game_engine.renderer.model.event.MouseClickEvent;
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import de.extio.game_engine.renderer.model.event.MouseEvent;
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import de.extio.game_engine.renderer.model.event.MouseMoveEvent;
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import de.extio.game_engine.renderer.model.event.UiControlEvent;
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import de.extio.game_engine.renderer.work.RendererWorkingSet;
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import de.extio.game_engine.renderer.work.RenderingBoPool;
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import de.extio.game_engine.spatial2.SpatialUtils2;
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import de.extio.game_engine.spatial2.model.Area2;
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import de.extio.game_engine.spatial2.model.CoordI2;
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import de.extio.game_engine.spatial2.model.ImmutableCoordI2;
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import de.extio.game_engine.spatial2.model.MutableCoordI2;
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@Component
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@Scope("prototype")
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public class ScrollArea implements WindowComponent {
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private final static Logger LOGGER = LoggerFactory.getLogger(ScrollArea.class);
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protected static final int SCROLLBAR_WIDTH = 20;
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protected static final int SCROLLBAR_WIDTH_WITH_MARGIN = 25;
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protected final RenderingBoPool renderingBoPool;
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protected final EventService eventService;
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protected final String id = Objects.toIdentityString(this);
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protected final String verticalScrollbarName = Objects.toIdentityString(this) + "_VerticalScrollbar";
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protected final String horizontalScrollbarName = Objects.toIdentityString(this) + "_HorizontalScrollbar";
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protected final MutableCoordI2 contentDimension = MutableCoordI2.create();
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protected final Set<String> renderingBoIds = new HashSet<>();
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protected final Area2 relativeArea = new Area2(ImmutableCoordI2.zero(), ImmutableCoordI2.one());
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protected Window parent;
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protected double scrollPositionVertical = 1.0;
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protected double scrollPositionHorizontal = 0.0;
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public ScrollArea(final RenderingBoPool renderingBoPool, final EventService eventService) {
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this.renderingBoPool = renderingBoPool;
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this.eventService = eventService;
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}
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@Override
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public void onAddedToWindow() {
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this.eventService.register(UiControlEvent.class, this.id, this::onScrollbarControlEvent);
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this.eventService.register(MouseClickEvent.class, this.id, this::onMouseWheelEvent);
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}
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@Override
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public void onRemovedFromWindow() {
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this.eventService.unregister(UiControlEvent.class, this.id);
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this.eventService.unregister(MouseClickEvent.class, this.id);
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}
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protected void onScrollbarControlEvent(final UiControlEvent event) {
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if (this.verticalScrollbarName.equals(event.getId())) {
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final double rawValue = ((Double) event.getPayload()).doubleValue();
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this.scrollPositionVertical = rawValue;
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this.parent.draw();
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}
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else if (this.horizontalScrollbarName.equals(event.getId())) {
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final double rawValue = ((Double) event.getPayload()).doubleValue();
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this.scrollPositionHorizontal = rawValue;
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this.parent.draw();
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}
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}
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protected void onMouseWheelEvent(final MouseClickEvent event) {
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if (event.getButton() == 4 || event.getButton() == 5) {
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if (! SpatialUtils2.intersects(
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this.relativeArea.getPosition().add(this.parent.getAbsolutePosition()),
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this.relativeArea.getDimension(),
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event.getScaledCoord(),
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ImmutableCoordI2.one()
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)) {
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return;
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}
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final double scrollIncrement = 1.0 / Math.max(1, this.contentDimension.getY() / 50);
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final double delta = event.getButton() == 4 ? scrollIncrement : -scrollIncrement;
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this.scrollPositionVertical = Math.max(0.0, Math.min(1.0, this.scrollPositionVertical + delta));
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this.parent.draw();
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}
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}
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@Override
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public void draw() {
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final var renderingBos = this.parent.getRenderingBos().values();
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this.contentDimension.setXY(0, 0);
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for (final var bo : renderingBos) {
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if (bo instanceof final RenderingBoHasDimension boWithDim && this.renderingBoIds.contains(bo.getId())) {
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this.contentDimension.setX(Math.max(this.contentDimension.getX(), bo.getLocalX() + boWithDim.getWidth()));
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this.contentDimension.setY(Math.max(this.contentDimension.getY(), bo.getLocalY() + boWithDim.getHeight()));
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}
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}
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final var needsHorizontalScrollbar = this.contentDimension.getX() > this.relativeArea.getDimension().getX();
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final var needsVerticalScrollbar = this.contentDimension.getY() > this.relativeArea.getDimension().getY();
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if (needsHorizontalScrollbar || needsVerticalScrollbar) {
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for (final var bo : renderingBos) {
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if (bo instanceof final RenderingBoHasDimension boWithDim && this.renderingBoIds.contains(bo.getId())) {
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boWithDim.withVisibleArea(
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this.parent.getAbsolutePosition().getX() + this.relativeArea.getPosition().getX(),
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this.parent.getAbsolutePosition().getY() + this.relativeArea.getPosition().getY(),
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this.relativeArea.getDimension().getX() - (needsVerticalScrollbar ? SCROLLBAR_WIDTH_WITH_MARGIN : 0),
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this.relativeArea.getDimension().getY() - (needsHorizontalScrollbar ? SCROLLBAR_WIDTH_WITH_MARGIN : 0));
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this.parent.putRenderingBo(boWithDim);
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}
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}
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if (needsVerticalScrollbar) {
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final var verticalScrollbar = this.renderingBoPool.acquire(this.verticalScrollbarName, ControlRenderingBo.class)
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.setType(SliderControl.class)
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.setCustomData(Boolean.FALSE)
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.setCustomData2(this.scrollPositionVertical)
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.setCustomData3(this.scrollPositionVertical)
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.setEnabled(true)
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.setVisible(true)
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.withDimensionAbsolute(SCROLLBAR_WIDTH, this.relativeArea.getDimension().getY() - SCROLLBAR_WIDTH)
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.withPositionRelative(this.relativeArea.getPosition().getX() + this.relativeArea.getDimension().getX() - SCROLLBAR_WIDTH, this.relativeArea.getPosition().getY())
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.setLayer(RenderingBoLayer.UI_TOP);
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this.parent.putRenderingBo(verticalScrollbar);
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}
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else {
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this.parent.removeRenderingBo(this.verticalScrollbarName);
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}
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if (needsHorizontalScrollbar) {
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final var horizontalScrollbar = this.renderingBoPool.acquire(this.horizontalScrollbarName, ControlRenderingBo.class)
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.setType(SliderControl.class)
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.setCustomData(Boolean.TRUE)
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.setCustomData2(this.scrollPositionHorizontal)
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.setCustomData3(this.scrollPositionHorizontal)
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.setEnabled(true)
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.setVisible(true)
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.withDimensionAbsolute(this.relativeArea.getDimension().getX() - SCROLLBAR_WIDTH, SCROLLBAR_WIDTH)
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.withPositionRelative(this.relativeArea.getPosition().getX(), this.relativeArea.getPosition().getY() + this.relativeArea.getDimension().getY() - SCROLLBAR_WIDTH)
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.setLayer(RenderingBoLayer.UI_TOP);
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this.parent.putRenderingBo(horizontalScrollbar);
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}
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else {
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this.parent.removeRenderingBo(this.horizontalScrollbarName);
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}
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}
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}
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@Override
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public CoordI2 getRenderingBoExtraOffset(RenderingBo renderingBo) {
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int startX = (int) (this.scrollPositionHorizontal * (this.contentDimension.getX() - this.relativeArea.getDimension().getX() + SCROLLBAR_WIDTH_WITH_MARGIN));
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int startY = (int) ((1.0 - this.scrollPositionVertical) * (this.contentDimension.getY() - this.relativeArea.getDimension().getY() + SCROLLBAR_WIDTH_WITH_MARGIN));
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return ImmutableCoordI2.create(-startX, -startY);
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}
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public void putRenderingBo(final RenderingBo renderingBo) {
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this.renderingBoIds.add(renderingBo.getId());
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this.parent.putRenderingBo(renderingBo);
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}
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public void removeRenderingBo(final String renderingBoId) {
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this.renderingBoIds.remove(renderingBoId);
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this.parent.removeRenderingBo(renderingBoId);
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}
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public double getScrollPositionVertical() {
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return this.scrollPositionVertical;
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}
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public void setScrollPositionVertical(final double scrollPositionVertical) {
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// this.scrollPositionVertical = Math.max(0.0, Math.min(1.0, scrollPositionVertical));
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// this.draw();
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}
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public double getScrollPositionHorizontal() {
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return this.scrollPositionHorizontal;
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}
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public void setScrollPositionHorizontal(final double scrollPositionHorizontal) {
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// this.scrollPositionHorizontal = Math.max(0.0, Math.min(1.0, scrollPositionHorizontal));
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// this.draw();
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}
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@Override
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public CoordI2 getRelativePosition() {
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return this.relativeArea.getPosition();
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}
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public void setRelativePosition(CoordI2 relativePosition) {
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this.relativeArea.setPosition(relativePosition.toImmutableCoordI2());
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}
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public void setDimension(CoordI2 dimension) {
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this.relativeArea.setDimension(dimension.toImmutableCoordI2());
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}
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public void setRelativeArea(Area2 relativeArea) {
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this.relativeArea.setPosition(relativeArea.getPosition().toImmutableCoordI2());
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this.relativeArea.setDimension(relativeArea.getDimension().toImmutableCoordI2());
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}
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@Override
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public Set<String> getRenderingBoIds() {
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return this.renderingBoIds;
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}
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@Override
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public void setParent(Window window) {
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this.parent = window;
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}
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}
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