Example usage for com.google.gwt.canvas.dom.client Context2d getLineWidth

Introduction

In this page you can find the example usage for com.google.gwt.canvas.dom.client Context2d getLineWidth.

Prototype

public final native double getLineWidth() ;

Source Link

Document

Gets the current line-width.

Usage

From source file:examples.geometry.demos.RingOutlineExample.java

License:Open Source License

@Override
protected ControllableShape[] createShapes(Canvas canvas, EventBus eventBus) {
    return new ControllableShape[] { new ControllableShape(canvas, eventBus) {
        {//from   ww  w  . j  a  v  a2s . c o  m
            addControlPoints(new Point(100, 100), new Point(400, 100), new Point(400, 200));
            addControlPoints(new Point(400, 100), new Point(400, 400), new Point(300, 400));
            addControlPoints(new Point(400, 400), new Point(100, 400), new Point(100, 300));
            addControlPoints(new Point(100, 400), new Point(100, 100), new Point(200, 100));
        }

        @Override
        public Ring getShape() {
            Point[] cp = getPoints();

            Polygon[] polygons = new Polygon[cp.length / 3];
            for (int i = 0; i < polygons.length; i++) {
                polygons[i] = new Polygon(cp[3 * i], cp[3 * i + 1], cp[3 * i + 2]);
            }

            return new Ring(polygons);
        }

        @Override
        public void onDraw(Canvas canvas) {
            Context2d context = canvas.getContext2d();
            Ring ring = getShape();

            context.setStrokeStyle("black");
            double lineWidth = context.getLineWidth();
            context.setLineWidth(1);

            for (Polyline outline : ring.getOutlines()) {
                context.beginPath();
                for (Line l : outline.getCurves()) {
                    Point p1 = l.getP1();
                    Point p2 = l.getP2();

                    context.moveTo(p1.x, p1.y);
                    context.lineTo(p2.x, p2.y);
                    context.setLineWidth(lineWidth + 1);
                    context.stroke();
                }
                context.closePath();
            }

            context.setLineWidth(lineWidth);
        }
    } };
}

---

From source file:examples.geometry.demos.TriangulationExample.java

License:Open Source License

@Override
protected ControllableShape[] createShapes(Canvas canvas, EventBus eventBus) {
    return new ControllableShape[] { new ControllableShape(canvas, eventBus) {
        {/*w  w w .  jav  a2 s  . c  o m*/
            addControlPoints(new Point(300 / 2, 100 / 2), new Point(100 / 2, 200 / 2),
                    new Point(200 / 2, 300 / 2), new Point(100 / 2, 500 / 2), new Point(300 / 2, 400 / 2),
                    new Point(500 / 2, 600 / 2), new Point(600 / 2, 300 / 2), new Point(500 / 2, 400 / 2),
                    new Point(500 / 2, 200 / 2), new Point(300 / 2, 200 / 2));
        }

        @Override
        public Polygon getShape() {
            Polygon p = new Polygon(getPoints());
            return p;
        }

        @Override
        public void onDraw(Canvas canvas) {
            Context2d context = canvas.getContext2d();
            Polygon p = getShape();

            Polygon[] triangulation;
            try {
                triangulation = p.getTriangulation();
            } catch (NonSimplePolygonException x) {
                triangulation = new Polygon[] { p };
            }

            for (Polygon triangle : triangulation) {
                context.beginPath();
                context.setStrokeStyle("red");

                for (Line s : triangle.getOutlineSegments()) {
                    Point p1 = s.getP1();
                    Point p2 = s.getP2();
                    context.moveTo(p1.x, p1.y);
                    context.lineTo(p2.x, p2.y);
                    context.stroke();
                }
                context.closePath();
            }

            double lineWidth = context.getLineWidth();
            context.setLineWidth(lineWidth + 2);
            context.setStrokeStyle("black");

            context.beginPath();
            for (Line s : p.getOutlineSegments()) {
                Point p1 = s.getP1();
                Point p2 = s.getP2();
                context.moveTo(p1.x, p1.y);
                context.lineTo(p2.x, p2.y);
                context.stroke();
            }
            context.closePath();
            context.setLineWidth(lineWidth);
        }
    } };
}

---