package ch.asynk.rustanddust.ui; import com.badlogic.gdx.Gdx; import com.badlogic.gdx.math.Rectangle; import com.badlogic.gdx.graphics.GL20; import com.badlogic.gdx.graphics.glutils.HdpiUtils; import com.badlogic.gdx.graphics.g2d.Batch; import com.badlogic.gdx.graphics.g2d.NinePatch; public class Scrollable extends Widget { private float offset; private Widget child; private NinePatch patch; private Rectangle clip; public Scrollable(Widget child) { this(child, null); } public Scrollable(Widget child, NinePatch patch) { super(); this.offset = 0f; this.padding = 10f; this.child = child; this.patch = patch; this.clip = new Rectangle(); if (patch != null) setPosition(0, 0, patch.getTotalWidth(), patch.getTotalHeight()); } public Widget getChild() { return child; } @Override public boolean hit(float x, float y) { if (!super.hit(x, y)) return false; child.hit(x, y); return true; } public float getBestWidth() { return (child.getWidth() + (2 * padding)); } public float getBestHeight() { return (child.getHeight() + (2 * padding)); } public boolean drag(float x, float y, int dx, int dy) { child.translate(0, dy); if (child.getY() > (getY() + padding)) child.rect.y = (getY() + padding); if (child.getTop() < (getTop() - padding)) child.rect.y = (getTop() - padding - child.getHeight()); return true; } @Override public void dispose() { child.dispose(); } @Override public void setPosition(float x, float y, float w, float h) { rect.set(x, y, w, h); child.setPosition((x + padding), (y + padding), (w - 2 * padding), (h - 2 * padding)); clip.set((x + padding), (y + padding), (w - 2 * padding), (h - 2 * padding)); } @Override public void draw(Batch batch) { if (!visible) return; if (patch != null) patch.draw(batch, rect.x, rect.y, rect.width, rect.height); batch.flush(); HdpiUtils.glScissor((int) clip.x, (int) clip.y, (int) clip.width, (int) clip.height); Gdx.gl.glEnable(GL20.GL_SCISSOR_TEST); child.draw(batch); batch.flush(); Gdx.gl.glDisable(GL20.GL_SCISSOR_TEST); } }