118 lines
4.3 KiB
Java
118 lines
4.3 KiB
Java
/*
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* Decompiled with CFR 0.152.
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*/
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package net.minecraft.client.gui.components;
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import com.mojang.blaze3d.platform.cursor.CursorTypes;
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import net.minecraft.client.gui.GuiGraphics;
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import net.minecraft.client.gui.components.AbstractWidget;
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import net.minecraft.client.input.MouseButtonEvent;
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import net.minecraft.client.renderer.RenderPipelines;
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import net.minecraft.network.chat.Component;
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import net.minecraft.resources.Identifier;
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import net.minecraft.util.Mth;
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public abstract class AbstractScrollArea
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extends AbstractWidget {
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public static final int SCROLLBAR_WIDTH = 6;
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private double scrollAmount;
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private static final Identifier SCROLLER_SPRITE = Identifier.withDefaultNamespace("widget/scroller");
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private static final Identifier SCROLLER_BACKGROUND_SPRITE = Identifier.withDefaultNamespace("widget/scroller_background");
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private boolean scrolling;
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public AbstractScrollArea(int x, int y, int width, int height, Component message) {
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super(x, y, width, height, message);
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}
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@Override
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public boolean mouseScrolled(double mx, double my, double scrollX, double scrollY) {
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if (!this.visible) {
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return false;
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}
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this.setScrollAmount(this.scrollAmount() - scrollY * this.scrollRate());
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return true;
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}
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@Override
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public boolean mouseDragged(MouseButtonEvent event, double dx, double dy) {
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if (this.scrolling) {
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if (event.y() < (double)this.getY()) {
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this.setScrollAmount(0.0);
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} else if (event.y() > (double)this.getBottom()) {
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this.setScrollAmount(this.maxScrollAmount());
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} else {
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double max = Math.max(1, this.maxScrollAmount());
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int barHeight = this.scrollerHeight();
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double yDragScale = Math.max(1.0, max / (double)(this.height - barHeight));
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this.setScrollAmount(this.scrollAmount() + dy * yDragScale);
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}
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return true;
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}
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return super.mouseDragged(event, dx, dy);
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}
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@Override
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public void onRelease(MouseButtonEvent event) {
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this.scrolling = false;
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}
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public double scrollAmount() {
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return this.scrollAmount;
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}
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public void setScrollAmount(double scrollAmount) {
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this.scrollAmount = Mth.clamp(scrollAmount, 0.0, (double)this.maxScrollAmount());
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}
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public boolean updateScrolling(MouseButtonEvent event) {
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this.scrolling = this.scrollbarVisible() && this.isValidClickButton(event.buttonInfo()) && this.isOverScrollbar(event.x(), event.y());
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return this.scrolling;
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}
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protected boolean isOverScrollbar(double x, double y) {
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return x >= (double)this.scrollBarX() && x <= (double)(this.scrollBarX() + 6) && y >= (double)this.getY() && y < (double)this.getBottom();
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}
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public void refreshScrollAmount() {
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this.setScrollAmount(this.scrollAmount);
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}
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public int maxScrollAmount() {
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return Math.max(0, this.contentHeight() - this.height);
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}
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protected boolean scrollbarVisible() {
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return this.maxScrollAmount() > 0;
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}
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protected int scrollerHeight() {
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return Mth.clamp((int)((float)(this.height * this.height) / (float)this.contentHeight()), 32, this.height - 8);
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}
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protected int scrollBarX() {
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return this.getRight() - 6;
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}
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protected int scrollBarY() {
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return Math.max(this.getY(), (int)this.scrollAmount * (this.height - this.scrollerHeight()) / this.maxScrollAmount() + this.getY());
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}
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protected void renderScrollbar(GuiGraphics graphics, int mouseX, int mouseY) {
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if (this.scrollbarVisible()) {
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int scrollbarX = this.scrollBarX();
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int scrollerHeight = this.scrollerHeight();
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int scrollerY = this.scrollBarY();
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graphics.blitSprite(RenderPipelines.GUI_TEXTURED, SCROLLER_BACKGROUND_SPRITE, scrollbarX, this.getY(), 6, this.getHeight());
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graphics.blitSprite(RenderPipelines.GUI_TEXTURED, SCROLLER_SPRITE, scrollbarX, scrollerY, 6, scrollerHeight);
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if (this.isOverScrollbar(mouseX, mouseY)) {
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graphics.requestCursor(this.scrolling ? CursorTypes.RESIZE_NS : CursorTypes.POINTING_HAND);
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}
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}
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}
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protected abstract int contentHeight();
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protected abstract double scrollRate();
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}
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