gann-cdf / graphics

import org.gannacademy.cdf.graphics.Drawable;

import org.gannacademy.cdf.graphics.Text;

import org.gannacademy.cdf.graphics.geom.Rectangle;

import org.gannacademy.cdf.graphics.geom.*;

import org.gannacademy.cdf.graphics.ui.AppWindow;

import java.awt.*;

import java.awt.geom.Point2D;

public class TransformationDemo extends AppWindow {

    boolean inflation = true;

    int steps = 0;

    private void centerOnShape(Text label, Drawable shape) {

        label.setLocation(shape.getX() + (shape.getWidth() - label.getWidth()) / 2, shape.getY() + (shape.getHeight() - label.getHeight()) / 2 + label.getMaxAscent());

    }

    @Override

    protected void setup() {

        Color

                transparentRed = new Color(1f, 0f, 0f, 0.5f),

                transparentBlue = new Color(0f, 0f, 1f, 0.5f);

        r = new Rectangle(100, 50, 150, 100, getDrawingPanel());

        r.setFillColor(transparentRed);

        rr = new RoundRectangle(350, 50, 150, 100, 25, 25, getDrawingPanel());

        rr.setFillColor(transparentRed);

        e = new Ellipse(100, 250, 150, 100, getDrawingPanel());

        e.setFillColor(transparentRed);

        a = new Arc(350, 250, 150, 100, 117, 312, getDrawingPanel());

        a.setFillColor(transparentRed);

        rect = r.getAsPath();

        rect.setFillColor(transparentBlue);

        roundRect = rr.getAsPath();

        roundRect.setFillColor(transparentBlue);

        ellipse = e.getAsPath();

        ellipse.setFillColor(transparentBlue);

        arc = a.getAsPath();

        arc.setFillColor(transparentBlue);

        Text label = new Text("Translate", 0, 0, getDrawingPanel());

        centerOnShape(label, r);

        label = new Text("Shear", 0, 0, getDrawingPanel());

        centerOnShape(label, rr);

        label = new Text("Scale", 0, 0, getDrawingPanel());

        centerOnShape(label, e);

        label = new Text("Rotate", 0, 0, getDrawingPanel());

        centerOnShape(label, a);

    }

    @Override

    protected void loop() {

        steps++;

        if (steps > 100) {

            inflation = !inflation;

            steps = 0;

        }

        rect.translate(.6 * (inflation ? 1 : 0 - 1), .4 * (inflation ? 1 : 0 - 1));

        Point2D p = ellipse.getLocation();

        ellipse.scale(1 + (inflation ? 1 : 0 - 1) * .01, 1 + (inflation ? 1 : 0 - 1) * .01);

        ellipse.setLocation(p.getX(), p.getY());

        p = roundRect.getLocation();

        roundRect.shear(.01 * (inflation ? 1 : 0 - 1), .01 * (inflation ? 1 : 0 - 1));

        roundRect.setLocation(p.getX(), p.getY());

        arc.rotate(Math.PI / 180 * (inflation ? 1 : 0 - 1), 425, 300);

        sleep(100);

    }

}