RoughlyEnoughItems/src/main/java/me/shedaniel/rei/gui/widget/ButtonWidget.java

package me.shedaniel.rei.gui.widget;

import com.mojang.blaze3d.platform.GlStateManager;
import me.shedaniel.rei.client.ScreenHelper;
import net.minecraft.client.audio.PositionedSoundInstance;
import net.minecraft.client.gui.Element;
import net.minecraft.client.gui.widget.AbstractButtonWidget;
import net.minecraft.sound.SoundEvents;
import net.minecraft.text.TextComponent;
import net.minecraft.util.math.MathHelper;

import java.awt.*;
import java.util.Collections;
import java.util.List;
import java.util.Optional;

public abstract class ButtonWidget extends HighlightableWidget {
    
    public String text;
    public boolean enabled;
    public boolean focused;
    private Rectangle bounds;
    
    public ButtonWidget(Rectangle rectangle, TextComponent text) {
        this(rectangle, text.getFormattedText());
    }
    
    public ButtonWidget(Rectangle rectangle, String text) {
        this.bounds = rectangle;
        this.enabled = true;
        this.text = text;
    }
    
    public ButtonWidget(int x, int y, int width, int height, String text) {
        this(new Rectangle(x, y, width, height), text);
    }
    
    public ButtonWidget(int x, int y, int width, int height, TextComponent text) {
        this(new Rectangle(x, y, width, height), text);
    }
    
    public Rectangle getBounds() {
        return bounds;
    }
    
    protected int getTextureId(boolean boolean_1) {
        int int_1 = 1;
        if (!this.enabled) {
            int_1 = 0;
        } else if (boolean_1) {
            int_1 = 2;
        }
        
        return int_1;
    }
    
    @Override
    public void render(int mouseX, int mouseY, float delta) {
        int x = bounds.x, y = bounds.y, width = bounds.width, height = bounds.height;
        minecraft.getTextureManager().bindTexture(AbstractButtonWidget.WIDGETS_LOCATION);
        GlStateManager.color4f(1.0F, 1.0F, 1.0F, 1.0F);
        int textureOffset = this.getTextureId(isHovered(mouseX, mouseY));
        GlStateManager.enableBlend();
        GlStateManager.blendFuncSeparate(GlStateManager.SourceFactor.SRC_ALPHA, GlStateManager.DestFactor.ONE_MINUS_SRC_ALPHA, GlStateManager.SourceFactor.ONE, GlStateManager.DestFactor.ZERO);
        GlStateManager.blendFunc(GlStateManager.SourceFactor.SRC_ALPHA, GlStateManager.DestFactor.ONE_MINUS_SRC_ALPHA);
        //Four Corners
        this.blit(x, y, 0, 46 + textureOffset * 20, 4, 4);
        this.blit(x + width - 4, y, 196, 46 + textureOffset * 20, 4, 4);
        this.blit(x, y + height - 4, 0, 62 + textureOffset * 20, 4, 4);
        this.blit(x + width - 4, y + height - 4, 196, 62 + textureOffset * 20, 4, 4);
        
        //Sides
        this.blit(x + 4, y, 4, 46 + textureOffset * 20, width - 8, 4);
        this.blit(x + 4, y + height - 4, 4, 62 + textureOffset * 20, width - 8, 4);
        
        for(int i = y + 4; i < y + height - 4; i += 4) {
            this.blit(x, i, 0, 50 + textureOffset * 20, MathHelper.ceil(width / 2f), MathHelper.clamp(y + height - 4 - i, 0, 4));
            this.blit(x + MathHelper.ceil(width / 2f), i, 200 - MathHelper.floor(width / 2f), 50 + textureOffset * 20, MathHelper.floor(width / 2f), MathHelper.clamp(y + height - 4 - i, 0, 4));
        }
        
        int colour = 14737632;
        if (!this.enabled) {
            colour = 10526880;
        } else if (isHovered(mouseX, mouseY)) {
            colour = 16777120;
        }
        
        this.drawCenteredString(font, text, x + width / 2, y + (height - 8) / 2, colour);
        
        if (getTooltips().isPresent())
            if (!focused && isHighlighted(mouseX, mouseY))
                ScreenHelper.getLastOverlay().addTooltip(QueuedTooltip.create(getTooltips().get().split("\n")));
            else if (focused)
                ScreenHelper.getLastOverlay().addTooltip(QueuedTooltip.create(new Point(x + width / 2, y + height / 2), getTooltips().get().split("\n")));
    }
    
    public boolean isHovered(int mouseX, int mouseY) {
        return isMouseOver(mouseX, mouseY) || focused;
    }
    
    @Override
    public boolean changeFocus(boolean boolean_1) {
        if (!enabled)
            return false;
        this.focused = !this.focused;
        return true;
    }
    
    @Override
    public List<? extends Element> children() {
        return Collections.emptyList();
    }
    
    @Override
    public boolean mouseClicked(double mouseX, double mouseY, int button) {
        if (bounds.contains(mouseX, mouseY) && enabled && button == 0) {
            minecraft.getSoundManager().play(PositionedSoundInstance.master(SoundEvents.UI_BUTTON_CLICK, 1.0F));
            onPressed();
            return true;
        }
        return false;
    }
    
    @Override
    public boolean keyPressed(int int_1, int int_2, int int_3) {
        if (this.enabled && focused) {
            if (int_1 != 257 && int_1 != 32 && int_1 != 335) {
                return false;
            } else {
                minecraft.getSoundManager().play(PositionedSoundInstance.master(SoundEvents.UI_BUTTON_CLICK, 1.0F));
                this.onPressed();
                return true;
            }
        }
        return false;
    }
    
    public abstract void onPressed();
    
    public Optional<String> getTooltips() {
        return Optional.empty();
    }
    
}