path-game/src/pathgame/rendering/MenuRenderer.java

package pathgame.rendering;

import me.hammerle.snuviengine.api.Key;
import me.hammerle.snuviengine.api.Renderer;
import pathgame.gameplay.Keys;
import pathgame.gameplay.menu.Menu;
import pathgame.gameplay.menu.MenuButton;

public class MenuRenderer {
    private final float[] keyWidths;

    public MenuRenderer(Keys keys) {
        keyWidths = new float[keys.keys.length];
    }

    public void renderTick(Renderer r, float lag, Menu menu, Keys keys) {
        r.translateTo(0.0f, 0.0f);
        float scale = 2.0f;
        r.scale(scale, scale);
        r.updateMatrix();
        scale = 1.0f / scale;

        MenuButton[] options = menu.getOptions();

        float lastGap = 10.0f;
        float baseBoxHeight = 300.0f * scale;
        float textBoxPaddingY = (100.0f - (20.0f / 3.0f) * options.length) * scale;
        float windowHeight = r.getViewHeight() * scale;
        float windowWidth = r.getViewWidth() * scale;

        float y = (windowHeight - baseBoxHeight) * 0.5f + textBoxPaddingY;
        float textBoxHeight = baseBoxHeight - textBoxPaddingY * 2;
        float step = (textBoxHeight - r.getFontRenderer().getCharHeight()) / (options.length - 1) - lastGap / (options.length - 2);

        r.setMixColorEnabled(false);
        r.setColorEnabled(true);
        r.setTextureEnabled(false);
        r.enableBlending();

        r.getColorRenderer().drawRectangle(windowWidth * 0.10f, y - textBoxPaddingY * 0.5f, windowWidth * 0.90f, y + textBoxHeight + textBoxPaddingY * 0.5f, 0x50000000);

        r.setTextureEnabled(true);

        if(!menu.isOptionMenu()) {
            for(int i = 0; i < options.length - 1; i++) {
                renderText(options[i].getName(), menu.getActiveIndex() == i, r, windowWidth, y, false);
                y += step;
            }
            y += lastGap;
            renderText(options[options.length - 1].getName(), menu.getActiveIndex() == options.length - 1, r, windowWidth, y, false);
        } else {
            float max = Float.MIN_VALUE;
            for(int i = 0; i < keys.keys.length; i++) {
                keyWidths[i] = r.getFontRenderer().getSize(getKeyName(keys.keys[i])).getStringWidth();
                if(keyWidths[i] > max) {
                    max = keyWidths[i];
                }
            }

            for(int i = 0; i < options.length - 1; i++) {
                boolean active = menu.getActiveIndex() == i;
                renderText(options[i].getName(), active, r, windowWidth, y, true);
                r.getFontRenderer().drawString(windowWidth * 0.85f - max * 0.5f - keyWidths[i] * 0.5f, y, addColor(getKeyName(keys.keys[i]), active));
                y += step;
            }
            y += lastGap;
            renderText(options[options.length - 1].getName(), menu.getActiveIndex() == options.length - 1, r, windowWidth, y, true);
        }
    }

    private void renderText(String s, boolean active, Renderer r, float wWidth, float y, boolean left) {
        if(left) {
            r.getFontRenderer().drawString(wWidth * 0.15f, y, addColor(s, active));
        } else {
            r.getFontRenderer().drawString(wWidth * 0.5f - (r.getFontRenderer().getSize(s).getStringWidth() * 0.5f), y, addColor(s, active));
        }
    }

    private String addColor(String s, boolean active) {
        return (active ? "#FFFFFF" : "#AAAAAA") + s;
    }

    private String getKeyName(Key key) {
        if(key.isRebinding()) {
            return "[...]";
        } else {
            return key.getName();
        }
    }
}