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package dev.isxander.yacl.gui;
import net.minecraft.client.Minecraft;
import net.minecraft.client.gui.Font;
import net.minecraft.client.gui.components.AbstractWidget;
import net.minecraft.client.gui.components.TabButton;
import net.minecraft.client.gui.components.events.GuiEventListener;
import net.minecraft.client.gui.components.tabs.Tab;
import net.minecraft.client.gui.components.tabs.TabManager;
import net.minecraft.client.gui.components.tabs.TabNavigationBar;
import net.minecraft.util.Mth;
import org.jetbrains.annotations.Nullable;
public class ScrollableNavigationBar extends TabNavigationBar {
private static final int NAVBAR_MARGIN = 28;
private static final Font font = Minecraft.getInstance().font;
private int scrollOffset;
private int maxScrollOffset;
public ScrollableNavigationBar(int i, TabManager tabManager, Iterable<Tab> iterable) {
super(i, tabManager, iterable);
}
@Override
public void arrangeElements() {
int noScrollWidth = this.width - NAVBAR_MARGIN*2;
int minimumSize = tabButtons.stream()
.map(AbstractWidget::getMessage)
.mapToInt(label -> font.width(label) + 3)
.min().orElse(0);
int singleTabWidth = Math.max(noScrollWidth / Math.min(this.tabButtons.size(), 3), minimumSize);
for (TabButton tabButton : this.tabButtons) {
tabButton.setWidth(singleTabWidth);
}
this.layout.arrangeElements();
this.layout.setY(0);
this.scrollOffset = 0;
int allTabsWidth = singleTabWidth * this.tabButtons.size();
this.layout.setX(Math.max((this.width - allTabsWidth) / 2, NAVBAR_MARGIN));
this.maxScrollOffset = Math.max(0, allTabsWidth - noScrollWidth);
}
@Override
public boolean mouseScrolled(double mouseX, double mouseY, double amount) {
this.setScrollOffset(this.scrollOffset - (int)(amount*10));
return true;
}
@Override
public boolean isMouseOver(double mouseX, double mouseY) {
return mouseY <= 24;
}
public void setScrollOffset(int scrollOffset) {
layout.setX(layout.getX() + this.scrollOffset);
this.scrollOffset = Mth.clamp(scrollOffset, 0, maxScrollOffset);
layout.setX(layout.getX() - this.scrollOffset);
}
public int getScrollOffset() {
return scrollOffset;
}
@Override
public void setFocused(@Nullable GuiEventListener child) {
super.setFocused(child);
if (child instanceof TabButton tabButton) {
this.ensureVisible(tabButton);
}
}
protected void ensureVisible(TabButton tabButton) {
if (tabButton.getX() < NAVBAR_MARGIN) {
this.setScrollOffset(this.scrollOffset - (NAVBAR_MARGIN - tabButton.getX()));
} else if (tabButton.getX() + tabButton.getWidth() > this.width - NAVBAR_MARGIN) {
this.setScrollOffset(this.scrollOffset + (tabButton.getX() + tabButton.getWidth() - (this.width - NAVBAR_MARGIN)));
}
}
}
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