List of usage examples for com.google.gwt.canvas.dom.client Context2d moveTo
public final native void moveTo(double x, double y) ;
From source file:com.google.gwt.sample.mobilewebapp.client.desktop.PieChart.java
License:Apache License
/** * Redraw the pie chart./*w w w. j a v a 2s. co m*/ */ public void redraw() { if (!isAttached()) { return; } // Get the dimensions of the chart. int width = canvas.getCoordinateSpaceWidth(); int height = canvas.getCoordinateSpaceHeight(); double radius = Math.min(width, height) / 2.0; double cx = width / 2.0; double cy = height / 2.0; // Clear the context. Context2d context = canvas.getContext2d(); context.clearRect(0, 0, width, height); // Get the total weight of all slices. double totalWeight = 0; for (Slice slice : slices) { totalWeight += slice.weight; } // Draw the slices. double startAngle = -0.5 * Math.PI; for (Slice slice : slices) { double weight = slice.weight / totalWeight; double endAngle = startAngle + (weight * RADIANS_IN_CIRCLE); context.setFillStyle(slice.fill); context.beginPath(); context.moveTo(cx, cy); context.arc(cx, cy, radius, startAngle, endAngle); context.fill(); startAngle = endAngle; } }
From source file:com.kk_electronic.kkportal.debug.modules.UsageGraph.java
License:Open Source License
@Inject public UsageGraph(CpuUsage model) { Context2d context = canvas.getContext2d(); model.addDisplay(this); context.setLineWidth(1);//from w w w.ja v a 2 s . co m context.setStrokeStyle("black"); canvas.getElement().getStyle().setBorderWidth(borderSize, Unit.PX); canvas.getElement().getStyle().setBorderStyle(BorderStyle.SOLID); canvas.getElement().getStyle().setBorderColor(borderColor); context.beginPath(); context.moveTo(1, 1); context.lineTo(1, 50); context.lineTo(100, 50); context.lineTo(50, 1); context.closePath(); context.stroke(); timer.scheduleRepeating(100); }
From source file:com.kk_electronic.kkportal.debug.modules.UsageGraph.java
License:Open Source License
private void drawPath(List<? extends Double> values, double shift) { if (values == null || values.isEmpty()) return;//w w w.jav a 2 s . c o m Context2d context = canvas.getContext2d(); // context.setTransform(m11, m12, m21, m22, dx, dy) context.clearRect(0, 0, canvas.getOffsetWidth(), canvas.getCoordinateSpaceHeight()); // context.clear(); context.beginPath(); double pixelpersecond = canvas.getCoordinateSpaceWidth() / magicNumber; int o = Math.max(60 - values.size(), 0); // How many missing values context.moveTo((o - shift * 2 - 1) * pixelpersecond, canvas.getCoordinateSpaceHeight() * values.get(0)); for (int i = 1, l = values.size(); i < l; i++) { double x = (i + o - shift * 2 - 1) * pixelpersecond; double y = canvas.getCoordinateSpaceHeight() * (1 - values.get(i)); context.lineTo(x, y); } context.stroke(); }
From source file:com.mecatran.otp.gwt.client.view.ItineraryDetailsWidget.java
License:Open Source License
/** * Build the background image for the widget, according to the mode. Draw * the mode image and a solid line below it with the route color (if in * transit mode) or a dotted line (if in road mode). Set the * background-image to the generated image for the given widget. *//*from ww w .j a v a 2 s . com*/ public static void styleComponentWithMode(final Widget widget, TransportMode mode, String color) { PlannerResources resources = PlannerResources.INSTANCE; ImageResource baseImage = null; boolean road = false; switch (mode) { case WALK: road = true; color = "#666666"; baseImage = resources.modeWalkPng(); break; case BICYCLE: road = true; color = "#23C30B"; baseImage = resources.modeBicyclePng(); break; case BICYCLE_RENTAL: road = true; color = "#23C30B"; baseImage = resources.modeBikeRentalPng(); break; case CAR: road = true; color = "#333333"; baseImage = resources.modeCarPng(); break; default: case BUS: baseImage = resources.modeBusPng(); break; case TRAM: baseImage = resources.modeTramPng(); break; case FERRY: baseImage = resources.modeFerryPng(); break; case GONDOLA: baseImage = resources.modeGondolaPng(); break; case PLANE: baseImage = resources.modePlanePng(); break; case RAIL: baseImage = resources.modeRailPng(); break; case SUBWAY: baseImage = resources.modeSubwayPng(); break; case TROLLEY: baseImage = resources.modeTrolleyPng(); break; } final String url = baseImage.getSafeUri().asString(); final Canvas canvas = Canvas.createIfSupported(); if (canvas != null) { int width = baseImage.getWidth(); int height = 1000; canvas.setCoordinateSpaceWidth(width); canvas.setCoordinateSpaceHeight(height); final Context2d context = canvas.getContext2d(); context.setLineCap(LineCap.BUTT); if (road) { context.setStrokeStyle(CssColor.make(color)); context.setLineWidth(4); for (int y = baseImage.getHeight(); y < 1000; y += 7) { context.moveTo(width / 2, y); context.lineTo(width / 2, y + 5); } context.stroke(); } else { context.setStrokeStyle(CssColor.make("#000000")); context.setLineWidth(5); context.moveTo(width / 2, 0); context.lineTo(width / 2, height - 1); context.stroke(); context.setStrokeStyle(CssColor.make(color)); context.setLineWidth(4); context.moveTo(width / 2, 0); context.lineTo(width / 2, height - 1); context.stroke(); } /* * HACK ALERT! Image.onLoad event does not fire up when using * internal resources (URL is internal data), but using the image * immediately does not work (image does not seems to be ready). We * defer the processing of the image rendering to a timer delayed a * bit. */ Timer timer = new Timer() { @Override public void run() { Image image = new Image(url); ImageElement e = ImageElement.as(image.getElement()); context.drawImage(e, 0, 0); String url2 = canvas.toDataUrl("image/png"); widget.getElement().getStyle().setBackgroundImage("url('" + url2 + "')"); } }; timer.schedule(500); } else { widget.getElement().getStyle().setBackgroundImage("url('" + url + "')"); } }
From source file:com.philbeaudoin.quebec.client.scene.Arrow.java
License:Apache License
@Override public void drawUntransformed(double time, Context2d context) { context.beginPath();//from ww w . ja v a 2 s .c om context.moveTo(from.getX(), from.getY()); context.bezierCurveTo(p1.getX(), p1.getY(), p2.getX(), p2.getY(), p3.getX(), p3.getY()); context.lineTo(p4.getX(), p4.getY()); context.lineTo(to.getX(), to.getY()); context.lineTo(p5.getX(), p5.getY()); context.lineTo(p6.getX(), p6.getY()); context.bezierCurveTo(p2.getX(), p2.getY(), p1.getX(), p1.getY(), from.getX(), from.getY()); context.setLineWidth(0.0045); context.setStrokeStyle("#aaa"); context.stroke(); context.setLineWidth(0.001); context.setStrokeStyle("#000"); context.stroke(); context.fill(); }
From source file:com.philbeaudoin.quebec.client.scene.Callout.java
License:Apache License
@Override public void drawUntransformed(double time, Context2d context) { context.beginPath();/*from w ww .j a v a 2 s.co m*/ context.moveTo(p1.getX(), p1.getY()); context.lineTo(to.getX(), to.getY()); context.lineTo(p3.getX(), p3.getY()); context.lineTo(p1.getX(), p1.getY()); context.setLineWidth(0.002); context.setStrokeStyle("#000"); context.stroke(); context.setFillStyle("#aaa"); context.fill(); }
From source file:com.sencha.gxt.chart.client.draw.engine.Canvas2d.java
License:sencha.com license
private PathCommand appendPathCommands(Context2d ctx, List<PathCommand> commands, PrecisePoint currentPoint, PrecisePoint movePoint, PrecisePoint curvePoint, PrecisePoint quadraticPoint) { PathCommand last = null;/*from w w w. jav a 2 s . c om*/ for (PathCommand cmd : commands) { last = cmd; if (cmd instanceof MoveTo) { MoveTo move = (MoveTo) cmd; quadraticPoint.setX(currentPoint.getX()); quadraticPoint.setY(currentPoint.getY()); movePoint.setX(move.getX()); movePoint.setY(move.getY()); currentPoint.setX(move.getX()); currentPoint.setY(move.getY()); curvePoint.setX(move.getX()); curvePoint.setY(move.getY()); ctx.moveTo(move.getX(), move.getY()); } else if (cmd instanceof LineTo) { LineTo line = (LineTo) cmd; quadraticPoint.setX(currentPoint.getX()); quadraticPoint.setY(currentPoint.getY()); currentPoint.setX(line.getX()); currentPoint.setY(line.getY()); curvePoint.setX(line.getX()); curvePoint.setY(line.getY()); ctx.lineTo(line.getX(), line.getY()); } else if (cmd instanceof CurveTo) { CurveTo curve = (CurveTo) cmd; quadraticPoint.setX(currentPoint.getX()); quadraticPoint.setY(currentPoint.getY()); currentPoint.setX(curve.getX()); currentPoint.setY(curve.getY()); curvePoint.setX(curve.getX2()); curvePoint.setY(curve.getY2()); ctx.bezierCurveTo(curve.getX1(), curve.getY1(), curve.getX2(), curve.getY2(), curve.getX(), curve.getY()); } else if (cmd instanceof CurveToQuadratic) { CurveToQuadratic curve = (CurveToQuadratic) cmd; double ax = 2.0 * curve.getX1() / 3.0; double ay = 2.0 * curve.getY1() / 3.0; quadraticPoint.setX(curve.getX1()); quadraticPoint.setY(curve.getY1()); currentPoint.setX(curve.getX() / 3.0 + ax); currentPoint.setY(curve.getY() / 3.0 + ay); curvePoint.setX(curve.getX1()); curvePoint.setY(curve.getY1()); ctx.quadraticCurveTo(curve.getX1(), curve.getY1(), curve.getX(), curve.getY()); } else if (cmd instanceof ClosePath) { quadraticPoint.setX(currentPoint.getX()); quadraticPoint.setY(currentPoint.getY()); ctx.closePath(); } else { assert cmd instanceof EllipticalArc || cmd instanceof CurveToQuadraticSmooth || cmd instanceof CurveToSmooth || cmd instanceof LineToHorizontal || cmd instanceof LineToVertical : cmd.getClass() + " is not yet implemented"; last = appendPathCommands(ctx, cmd.toCurve(currentPoint, movePoint, curvePoint, quadraticPoint), currentPoint, movePoint, curvePoint, quadraticPoint); CurveTo curve = (CurveTo) last; currentPoint.setX(curve.getX()); currentPoint.setY(curve.getY()); curvePoint.setX(curve.getX2()); curvePoint.setY(curve.getY2()); } } return last; }
From source file:edu.umb.jsPedigrees.client.Pelican.PelicanLines.java
License:Open Source License
public static Canvas drawLines(AbsolutePanel panel) { Canvas canvas = Canvas.createIfSupported(); Context2d ctx = canvas.getContext2d(); canvas.setCoordinateSpaceHeight(panel.getOffsetHeight()); canvas.setCoordinateSpaceWidth(panel.getOffsetWidth()); ctx.setStrokeStyle(CssColor.make("0,0,0")); ctx.setLineWidth(1.0f);// w ww. j a v a 2s .c o m ctx.setFont("12px sans-serif"); int fontHeight = 15; int fontAscent = 15; int dropSize = Math.max(2, Math.min(PelicanPerson.symbolSize / 2, 3 * (PelicanPerson.ySpace - PelicanPerson.symbolSize - fontHeight) / 4)); for (int i = 0; i < panel.getWidgetCount(); i++) if (panel.getWidget(i) instanceof PelicanPerson) { // draw a line from this person to its parents PelicanPerson person = (PelicanPerson) panel.getWidget(i); if (person.father != null && person.mother != null) { //System.out.println("HERE "+String.valueOf(i)); // find the mother and father PelicanPerson father = person.father; PelicanPerson mother = person.mother; if (father != null && mother != null) { // line between parents int fatherX = panel.getWidgetLeft(father) + ((panel.getWidgetLeft(father) < panel.getWidgetLeft(mother)) ? PelicanPerson.symbolSize : 0); int motherX = panel.getWidgetLeft(mother) + ((panel.getWidgetLeft(mother) < panel.getWidgetLeft(father)) ? PelicanPerson.symbolSize : 0); int fatherY = panel.getWidgetTop(father) + PelicanPerson.symbolSize / 2; int motherY = panel.getWidgetTop(mother) + PelicanPerson.symbolSize / 2; int leftX = fatherX; int leftY = fatherY; int rightX = motherX; int rightY = motherY; if (motherX < fatherX) { leftX = motherX; leftY = motherY; rightX = fatherX; rightY = fatherY; } int gap = PelicanPerson.xSpace - PelicanPerson.symbolSize; // see if any subjects lie between the father and mother if (!adjacent(panel, father, mother) && father.generation == mother.generation) { // draw lines which avoid other symbols // g2.drawLine(leftX,leftY,leftX+gap/4,leftY); ctx.beginPath(); ctx.moveTo(leftX, leftY); ctx.lineTo(leftX + gap / 4, leftY); ctx.closePath(); ctx.stroke(); // g2.drawLine(rightX,rightY,rightX-gap/2,rightY); ctx.beginPath(); ctx.moveTo(rightX, rightY); ctx.lineTo(rightX - gap / 2, rightY); ctx.closePath(); ctx.stroke(); leftX += gap / 4; rightX -= gap / 2; // g2.drawLine(leftX,leftY,leftX,leftY-(PelicanPerson.symbolSize+dropSize)/2); ctx.beginPath(); ctx.moveTo(leftX, leftY); ctx.lineTo(leftX, leftY - (PelicanPerson.symbolSize + dropSize) / 2); ctx.closePath(); ctx.stroke(); // g2.drawLine(rightX,rightY,rightX,rightY-(PelicanPerson.symbolSize+dropSize)/2); ctx.beginPath(); ctx.moveTo(rightX, rightY); ctx.lineTo(rightX, rightY - (PelicanPerson.symbolSize + dropSize) / 2); ctx.closePath(); ctx.stroke(); leftY -= (PelicanPerson.symbolSize + dropSize) / 2; rightY -= (PelicanPerson.symbolSize + dropSize) / 2; } // g2.drawLine(leftX,leftY,rightX,rightY); ctx.beginPath(); ctx.moveTo(leftX, leftY); ctx.lineTo(rightX, rightY); ctx.closePath(); ctx.stroke(); // line up from child // g2.drawLine(person.getX()+PelicanPerson.symbolSize/2,person.getY(),person.getX()+PelicanPerson.symbolSize/2,person.getY()-dropSize); ctx.beginPath(); ctx.moveTo(panel.getWidgetLeft(person) + PelicanPerson.symbolSize / 2, panel.getWidgetTop(person)); ctx.lineTo(panel.getWidgetLeft(person) + PelicanPerson.symbolSize / 2, panel.getWidgetTop(person) - dropSize); ctx.closePath(); ctx.stroke(); // line across from child // try to attach to an orphan parent int parentX = fatherX; if (father.isOrphan() || mother.isOrphan()) { parentX = Math.max(fatherX, motherX) - gap / 2; } else { // if no orphan parents, go straight up from // middle laid out sib int nsib = 0; for (int j = 0; j < panel.getWidgetCount(); j++) if (panel.getWidget(j) instanceof PelicanPerson) { PelicanPerson sib = (PelicanPerson) panel.getWidget(j); if (areSibs(person, sib)) nsib++; } int sibs = 0; for (int j = 0; j < panel.getWidgetCount() && sibs <= nsib / 2; j++) if (panel.getWidget(j) instanceof PelicanPerson) { PelicanPerson sib = (PelicanPerson) panel.getWidget(j); if (areSibs(person, sib)) sibs++; parentX = panel.getWidgetLeft(sib) + PelicanPerson.symbolSize / 2; } if (nsib > 1 && nsib % 2 == 0) parentX -= PelicanPerson.xSpace / 2; if (parentX <= leftX) parentX = leftX + PelicanPerson.symbolSize / 2; if (parentX >= rightX) parentX = rightX - PelicanPerson.symbolSize / 2; } // g2.drawLine(person.getX()+PelicanPerson.symbolSize/2,person.getY()-dropSize,parentX,person.getY()-dropSize); ctx.beginPath(); ctx.moveTo(panel.getWidgetLeft(person) + PelicanPerson.symbolSize / 2, panel.getWidgetTop(person) - dropSize); ctx.lineTo(parentX, panel.getWidgetTop(person) - dropSize); ctx.closePath(); ctx.stroke(); // line up to parents // Draw a vertical line up to the line joining the parents // if this happens to be not between the parents, // change it to a line to the midpoint between the parents int parentY = (rightX != leftX) ? leftY + (rightY - leftY) * (parentX - leftX) / (rightX - leftX) : (leftY + rightY) / 2; if (rightX == leftX || parentY > Math.max(leftY, rightY) || parentY < Math.min(leftY, rightY)) { // g2.drawLine(parentX,person.getY()-dropSize, (leftX+rightX)/2,(leftY+rightY)/2); ctx.beginPath(); ctx.moveTo(parentX, panel.getWidgetTop(person) - dropSize); ctx.lineTo((leftX + rightX) / 2, (leftY + rightY) / 2); ctx.closePath(); ctx.stroke(); } else { // g2.drawLine(parentX,person.getY()-dropSize,parentX,parentY); ctx.beginPath(); ctx.moveTo(parentX, panel.getWidgetTop(person) - dropSize); ctx.lineTo(parentX, parentY); ctx.closePath(); ctx.stroke(); } } } // write out id int verticalPosn = panel.getWidgetTop(person) + PelicanPerson.symbolSize + fontAscent; String idString = String.valueOf(person.id); int fontWidth = (int) ctx.measureText(idString).getWidth(); // g2.drawString(idString, // person.getX() + PelicanPerson.symbolSize/2 - fontWidth/2, // verticalPosn); ctx.fillText(idString, panel.getWidgetLeft(person) + PelicanPerson.symbolSize / 2 - fontWidth / 2, verticalPosn); verticalPosn += fontAscent; } return canvas; }
From source file:examples.geometry.containment.AbstractPolygonContainmentExample.java
License:Open Source License
@Override protected AbstractControllableShape createControllableShape1(final Canvas canvas) { return new AbstractControllableShape(canvas) { @Override/* w ww .java 2 s.c om*/ public void createControlPoints() { // no control points => user cannot change it } @Override public Polygon createGeometry() { double w = canvas.getCoordinateSpaceWidth(), wg = w / 6, h = canvas.getCoordinateSpaceHeight(), hg = h / 6; return new Polygon(new Point[] { new Point(wg, hg), new Point(w - wg, h - hg), new Point(wg, h - hg), new Point(w - wg, hg) }); } @Override public void drawShape() { Context2d context2d = canvas.getContext2d(); Polygon polygon = createGeometry(); context2d.setStrokeStyle("black"); for (Line segment : polygon.getOutlineSegments()) { context2d.beginPath(); context2d.moveTo(segment.getX1(), segment.getY1()); context2d.lineTo(segment.getX2(), segment.getY2()); context2d.stroke(); } } }; }
From source file:examples.geometry.containment.PolygonLineContainment.java
License:Open Source License
@Override protected AbstractControllableShape createControllableShape2(final Canvas canvas) { return new AbstractControllableShape(canvas) { @Override//from w ww. j av a 2 s . com public void createControlPoints() { addControlPoint(new Point(100, 100)); addControlPoint(new Point(300, 300)); } @Override public Line createGeometry() { Point[] points = getControlPoints(); return new Line(points[0], points[1]); } @Override public void drawShape() { Line line = createGeometry(); Context2d c = canvas.getContext2d(); c.beginPath(); c.moveTo(line.getX1(), line.getY1()); c.lineTo(line.getX2(), line.getY2()); c.closePath(); c.stroke(); } @Override public void fillShape(CssColor color) { Context2d context2d = canvas.getContext2d(); FillStrokeStyle style = context2d.getFillStyle(); context2d.setLineWidth(3); context2d.setStrokeStyle(color.value()); drawShape(); context2d.setLineWidth(1); // context2d.setStrokeStyle(CssColor.make(0, 0, 0).value()); context2d.setStrokeStyle(style); } }; }