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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);
}
}
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