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package org.singinst.uf.presenter;
import java.util.List;
import org.singinst.uf.math.SimplePoint;
import org.singinst.uf.model.ScalarValueHolder;
import org.singinst.uf.model.ScalarRelation;
import org.singinst.uf.model.ValueListener;
public class RelationPresentation implements ValueListener {
private static final SimplePoint ORIGIN = new SimplePoint(0,0);
private static final SimplePoint UPPER_LEFT = new SimplePoint(0,1);
private static final SimplePoint LOWER_RIGHT = new SimplePoint(1,0);
private final GraphCanvas viewCanvas;
private final ScalarRelation relation;
private final GraphCanvas unitPlusMarginCanvas;
private final GraphCanvas hypothesisCanvas;
public RelationPresentation(GraphCanvas viewCanvas, ScalarRelation relation) {
this.viewCanvas = viewCanvas;
this.relation = relation;
unitPlusMarginCanvas = new ScaledCanvas(viewCanvas,
new PlaneBounds(-0.1, 1.06, -0.1, 1.02));
GraphCanvas unitCanvas = new ClippedCanvas(unitPlusMarginCanvas, new PlaneBounds(0, 1, 0, 1));
hypothesisCanvas = new ScaledCanvas(unitCanvas, new PlaneBounds(relation.getDomain(), relation.getRange()));
for (ScalarValueHolder scalarValueHolder : relation.getScalarValues()) {
scalarValueHolder.addUpdateListener(this);
}
}
public Runnable draw() {
viewCanvas.clear();
for (SimplePoint point : relation.decorationPoints) {
hypothesisCanvas.pushStyle(SimpleStyle.DECORATION_POINT);
hypothesisCanvas.drawDecorationPoint(point);
hypothesisCanvas.popStyle();
}
drawAxes();
List<? extends ScalarValuePointList> pointLists = relation.getPointLists();
for (ScalarValuePointList pointList : pointLists) {
if (pointList.getHypothesisPoints() == null) {
return pointList.updater();
}
pointList.draw(hypothesisCanvas);
}
return null;
}
private void drawAxes() {
unitPlusMarginCanvas.pushStyle(SimpleStyle.AXIS);
if (relation.getDomain().isVisibleAxis()) {
unitPlusMarginCanvas.drawLine(new SimpleLine(ORIGIN, LOWER_RIGHT));
}
if (relation.getRange().isVisibleAxis()) {
unitPlusMarginCanvas.drawLine(new SimpleLine(ORIGIN, UPPER_LEFT));
}
AxisDirection.X.draw(hypothesisCanvas, relation);
AxisDirection.Y.draw(hypothesisCanvas, relation);
unitPlusMarginCanvas.popStyle();
}
public void fireUpdate(double value) {
viewCanvas.invalidate();
}
}
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