List of usage examples for com.google.gwt.canvas.dom.client Context2d fillText
public final native void fillText(String text, double x, double y) ;
From source file:com.badlogic.gdx.backends.gwt.GwtApplicationCustom.java
License:Apache License
public PreloaderCallback getPreloaderCallback() { final Canvas canvas = Canvas.createIfSupported(); canvas.setWidth("100%"); canvas.setHeight("100%"); getRootPanel().add(canvas);//from w w w .j a v a 2 s . co m final Context2d context = canvas.getContext2d(); context.setTextAlign(TextAlign.CENTER); context.setTextBaseline(TextBaseline.MIDDLE); context.setFont("18pt Calibri"); return new PreloaderCallback() { @Override public void done() { context.fillRect(0, 0, 300, 40); } @Override public void loaded(String file, int loaded, int total) { System.out.println("loaded " + file + "," + loaded + "/" + total); // String color = Pixmap.make(30, 30, 30, 1); // context.setFillStyle(color); // context.setStrokeStyle(color); context.fillRect(0, 0, 300, 70); // color = Pixmap.make(200, 200, 200, (((TimeUtils.nanoTime() - loadStart) % 1000000000) / 1000000000f)); // context.setFillStyle(color); // context.setStrokeStyle(color); context.fillRect(0, 0, 300 * (loaded / (float) total) * 0.97f, 70); // context.setFillStyle(Pixmap.make(50, 50, 50, 1)); context.fillText("loading", 300 / 2, 70 / 2); } @Override public void error(String file) { System.out.println("error: " + file); } }; }
From source file:com.himamis.retex.renderer.web.font.DefaultFont.java
License:Open Source License
@Override public void drawGlyph(String c, int x, int y, int size, Context2d ctx) { FontW derived = new DefaultFont(name, style, size); ctx.setFont(derived.getCssFontString()); ctx.fillText(c, x, y); }
From source file:com.java33.vizpres.client.view.visualization.CanvasViz.java
License:Open Source License
/** * Renders the percent data values using the Canvas 2D API as horizontal * bars with a text label.//from w w w . j ava 2 s .c o m * * @param values Is the list of values to render. */ @Override public void setData(final List<PercentValue> values) { if (canvas != null) { final Context2d ctx = canvas.getContext2d(); ctx.clearRect(0, 0, width, height); ctx.setTextBaseline(Context2d.TextBaseline.TOP); if (values != null) { final int n = values.size(); for (int i = 0; i < n; i += 1) { final int rowY = i * ROW_HEIGHT; final int percent = values.get(i).percentage; final double barWidth = (double) (percent * width) / 100.0; ctx.setFillStyle("#ff6600"); ctx.fillRect(0, rowY, barWidth, BAR_HEIGHT); ctx.setFillStyle("#ffffff"); ctx.fillText(Integer.toString(percent), 4, rowY + TEXT_HEIGHT / 2); } } } }
From source file:com.philbeaudoin.quebec.client.scene.Text.java
License:Apache License
@Override public void drawUntransformed(double time, Context2d context) { context.scale(0.001, 0.001);/* w w w. j a v a 2 s . c om*/ context.setFont("25px arial"); context.fillText(text, 0, 0); }
From source file:com.sencha.gxt.chart.client.draw.engine.Canvas2d.java
License:sencha.com license
/** * In the Canvas2d class, this method does more or less what renderSprite does in SVG and VML - it * actually renders the sprite to the dom. * @param sprite the sprite to draw//from w w w.jav a 2 s . c o m */ protected void append(Sprite sprite) { if (sprite.isHidden() || sprite.getOpacity() == 0) { return; } Context2d ctx = getContext(); ctx.save(); //set global stuff, fill, stroke, clip, etc //clip - deal with translation or normal rectangle if (sprite.getClipRectangle() != null) { PreciseRectangle clip = sprite.getClipRectangle(); if (sprite.getScaling() != null || sprite.getTranslation() != null || sprite.getRotation() != null) { PathSprite transPath = new PathSprite(new RectangleSprite(clip)); transPath = transPath.map(sprite.transformMatrix()); appendPath(ctx, transPath); } else { ctx.beginPath(); ctx.rect(clip.getX(), clip.getY(), clip.getWidth(), clip.getHeight()); ctx.closePath(); } ctx.clip(); } if (sprite.getScaling() != null || sprite.getTranslation() != null || sprite.getRotation() != null || (component.isViewBox() && viewbox != null)) { Matrix matrix = sprite.transformMatrix(); if (matrix != null) { //TODO consider replacing this transform call with three distinct calls to translate/scale/rotate if cheaper ctx.transform(matrix.get(0, 0), matrix.get(1, 0), matrix.get(0, 1), matrix.get(1, 1), matrix.get(0, 2), matrix.get(1, 2)); } if (component.isViewBox() && viewbox != null) { double size = Math.min(getWidth() / viewbox.getWidth(), getHeight() / viewbox.getHeight()); ctx.scale(size, size); ctx.translate(-viewbox.getX(), -viewbox.getY()); } } //TODO see about caching colors via the dirty flag? If we don't use a color/gradient for a pass or three, dump it double opacity = Double.isNaN(sprite.getOpacity()) ? 1.0 : sprite.getOpacity(); PreciseRectangle untransformedBbox = sprite.getPathSprite().dimensions(); if (sprite.getStroke() != null && sprite.getStroke() != Color.NONE && sprite.getStrokeWidth() != 0) { ctx.setLineWidth(Double.isNaN(sprite.getStrokeWidth()) ? 1.0 : sprite.getStrokeWidth()); ctx.setStrokeStyle(getColor(sprite.getStroke(), untransformedBbox));//TODO read bbox from cache } if (sprite.getFill() != null && sprite.getFill() != Color.NONE) { ctx.setFillStyle(getColor(sprite.getFill(), untransformedBbox));//TODO read bbox from cache } if (sprite instanceof PathSprite) { appendPath(ctx, (PathSprite) sprite); } else if (sprite instanceof TextSprite) { TextSprite text = (TextSprite) sprite; //TODO style and weight ctx.setFont(text.getFontSize() + "px " + text.getFont()); ctx.setTextAlign(getTextAlign(text.getTextAnchor())); ctx.setTextBaseline(getTextBaseline(text.getTextBaseline())); ctx.fillText(text.getText(), text.getX(), text.getY()); } else if (sprite instanceof RectangleSprite) { RectangleSprite rect = (RectangleSprite) sprite; if (Double.isNaN(rect.getRadius()) || rect.getRadius() == 0) { if (sprite.getFill() != null && sprite.getFill() != Color.NONE) { ctx.setGlobalAlpha( Double.isNaN(sprite.getFillOpacity()) ? opacity : opacity * sprite.getFillOpacity()); ctx.fillRect(rect.getX(), rect.getY(), rect.getWidth(), rect.getHeight()); } if (sprite.getStroke() != null && sprite.getStroke() != Color.NONE && sprite.getStrokeWidth() != 0) { ctx.setGlobalAlpha(Double.isNaN(sprite.getStrokeOpacity()) ? opacity : opacity * sprite.getStrokeOpacity()); ctx.strokeRect(rect.getX(), rect.getY(), rect.getWidth(), rect.getHeight()); } } else { appendPath(ctx, rect.getPathSprite()); } } else if (sprite instanceof CircleSprite) { CircleSprite circle = (CircleSprite) sprite; ctx.beginPath(); ctx.arc(circle.getCenterX(), circle.getCenterY(), circle.getRadius(), 0, 2 * Math.PI); ctx.closePath(); if (sprite.getFill() != null && sprite.getFill() != Color.NONE) { ctx.setGlobalAlpha( Double.isNaN(sprite.getFillOpacity()) ? opacity : opacity * sprite.getFillOpacity()); ctx.fill(); } if (sprite.getStroke() != null && sprite.getStroke() != Color.NONE && sprite.getStrokeWidth() != 0) { ctx.setGlobalAlpha( Double.isNaN(sprite.getStrokeOpacity()) ? opacity : opacity * sprite.getStrokeOpacity()); ctx.stroke(); } } else if (sprite instanceof EllipseSprite) { appendPath(ctx, sprite.getPathSprite()); } else if (sprite instanceof ImageSprite) { ImageSprite image = (ImageSprite) sprite; ImageElement elt = Document.get().createImageElement(); elt.setSrc(image.getResource().getSafeUri().asString()); ctx.drawImage(elt, image.getX(), image.getY(), image.getWidth(), image.getHeight()); } ctx.restore(); if (!REDRAW_ALL) { renderedBbox.put(sprite, getBBox(sprite)); } sprite.clearDirtyFlags(); }
From source file:de.ga_ap.cirrus.newcloud.client.TheCloud.java
License:Open Source License
public TheCloud(final Element cloudContainer) { final NodeList<Element> aElements = cloudContainer.getElementsByTagName("A"); final int height = cloudContainer.getOffsetHeight(); final int width = cloudContainer.getOffsetWidth(); final Canvas canvas = Canvas.createIfSupported(); canvas.setCoordinateSpaceHeight(height); canvas.setCoordinateSpaceWidth(width); final Context2d context2d = canvas.getContext2d(); final double radius = canvas.getCanvasElement().getHeight() / 3; final int refreshrate = 30; final List<CloudItem> itemList = new ArrayList<CloudItem>(aElements.getLength()); for (int i = 0; i < aElements.getLength(); i++) { final Element el = aElements.getItem(i); final CloudItem ci = new CloudItem(); ci.text = el.getInnerText();//from w w w.j a v a2s.c o m itemList.add(ci); } cloudContainer.setInnerText(""); final int itemListSize = itemList.size(); for (int i = 1; i <= itemListSize; i++) { final CloudItem ci = itemList.get(i - 1); ci.theta = Math.acos(-1.0 + (2.0 * (double) i - 1.0) / itemListSize); ci.phi = Math.sqrt(itemListSize * Math.PI) * ci.theta; ci.z = radius * Math.cos(ci.theta); ci.y = radius * Math.sin(ci.theta) * Math.cos(ci.phi); ci.x = radius * Math.sin(ci.theta) * Math.sin(ci.phi); // TODO heightOfAllItems ?! // TODO font size context2d.fillText(ci.text, ci.y, ci.z); System.out.println(ci.x + " " + ci.y + " " + ci.z + " - " + ci.theta + " " + ci.phi); } Scheduler.get().scheduleFixedPeriod(new RepeatingCommand() { @Override public boolean execute() { canvas.setCoordinateSpaceHeight(height); canvas.setCoordinateSpaceWidth(width); final double cosPsi = Math.cos(psi); final double sinPsi = Math.sin(psi); final double cosTheta = Math.cos(theta); final double sinTheta = Math.sin(theta); final double sinThetaCosPsi = sinTheta * cosPsi; final double sinThetaSinPsi = sinTheta * sinPsi; for (final CloudItem ci : itemList) { final double x, y, z; x = ci.x * cosTheta * cosPsi + ci.y * cosTheta * sinPsi - ci.z * sinTheta; y = ci.x * (-sinPsi) + ci.y * cosPsi; z = ci.x * sinThetaCosPsi + ci.y * sinThetaSinPsi + ci.z * cosTheta; ci.x = x; ci.y = y; ci.z = z; context2d.setGlobalAlpha(0.7 + ci.x / radius / 3.0); context2d.setFont("20pt Arial"); context2d.fillText(ci.text, radius + ci.y, radius + ci.z); // System.out.println(ci.x + " " + ci.y + " " + ci.z + " - " // + ci.theta + " " + ci.phi + " " + ci.text); } theta += ySteps; psi += xSteps; // System.out.println(theta); if (theta > Math.PI * 2.0) { theta = 0.0; } if (psi > Math.PI * 2.0) { psi = 0.0; } return true; } }, refreshrate); // final EventListener listener = new EventListener() { // // @Override // public void onBrowserEvent(final Event event) { // if (event.getTypeInt() == Event.ONMOUSEMOVE) { // moveSteps(event); // } else if (event.getTypeInt() == Event.ONTOUCHMOVE) { // event.preventDefault(); // prevents the default behavior of // // a page when touching // moveSteps(event); // } // } // // private void moveSteps(final Event event) { // ySteps = -((event.getClientY() + Window.getScrollTop()) // / canvas.getCoordinateSpaceHeight() * 0.000002 - 0.1) / 2.0; // xSteps = ((event.getClientX() + Window.getScrollLeft()) // / canvas.getCoordinateSpaceWidth() * 0.000002 - 0.1) / 2.0; // } // }; // // DOM.setEventListener( // (com.google.gwt.user.client.Element) cloudContainer, listener); // DOM.sinkEvents((com.google.gwt.user.client.Element) cloudContainer, // Event.ONMOUSEMOVE + Event.ONTOUCHMOVE); System.out.println(radius); cloudContainer.appendChild(canvas.getCanvasElement()); }
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);// ww w .j av a 2 s . 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.demos.RegionClippingExample.java
License:Open Source License
@Override protected ControllableShape[] createShapes(Canvas canvas, EventBus eventBus) { return new ControllableShape[] { new ControllableShape(canvas, eventBus) { {/*from w ww . j a v a2 s .c o m*/ addControlPoints(new Point(100, 100), new Point(200, 200)); addControlPoints(new Point(150, 150), new Point(250, 250)); } @Override public Region getShape() { Point[] cp = getPoints(); Region region = new Region(new Rectangle(cp[0], cp[1]), new Rectangle(cp[2], cp[3])); return region; } @Override public void onDraw(Canvas canvas) { Context2d context = canvas.getContext2d(); Region region = getShape(); context.save(); context.beginPath(); Rectangle rr = region.getBounds(); context.rect(rr.getX(), rr.getY(), rr.getWidth(), rr.getHeight()); // context.fill(); context.clip(); for (int y = 0; y < 800; y += 20) { context.fillText( "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz", 20, y); } context.restore(); context.setFillStyle("blue"); context.setGlobalAlpha(0.5); context.beginPath(); for (Rectangle r : region.getShapes()) { context.fillRect(r.getX(), r.getY(), r.getWidth(), r.getHeight()); } context.closePath(); context.setFillStyle("black"); context.setGlobalAlpha(1); } } }; }
From source file:gov.nist.spectrumbrowser.client.SensorDataStream.java
License:Open Source License
@Override public void draw() { try {// w ww. ja va 2 s .c o m // TODO Auto-generated method stub verticalPanel.clear(); drawMenuItems(); HorizontalPanel spectrogramPanel = new HorizontalPanel(); colorMap = new ColorMap((int) maxPower, (int) minPower); verticalPanel.add(spectrogramPanel); frequencyValuesCanvas = Canvas.createIfSupported(); frequencyValuesCanvas.setWidth(100 + "px"); frequencyValuesCanvas.setHeight(SpectrumBrowser.SPEC_HEIGHT + "px"); frequencyValuesCanvas.setCoordinateSpaceHeight(SpectrumBrowser.SPEC_HEIGHT); frequencyValuesCanvas.setCoordinateSpaceWidth(100); spectrogramCanvas = Canvas.createIfSupported(); spectrogramCanvas.setTitle("Click to freeze/unfreeze"); spectrogramCanvas.setWidth(SpectrumBrowser.SPEC_WIDTH + "px"); spectrogramCanvas.setHeight(SpectrumBrowser.SPEC_HEIGHT + "px"); spectrogramCanvas.setCoordinateSpaceWidth(SpectrumBrowser.SPEC_WIDTH); spectrogramCanvas.setCoordinateSpaceHeight(SpectrumBrowser.SPEC_HEIGHT); spectrogramCanvas.addClickHandler(new ClickHandler() { @Override public void onClick(ClickEvent event) { isFrozen = !isFrozen; if (isFrozen) { freezeButton.setText("Unfreeze"); } else { freezeButton.setText("Freeze"); } } }); spectrogramPanel.add(frequencyValuesCanvas); spectrogramPanel.add(spectrogramCanvas); spectrogramPanel.setBorderWidth(3); // Draw the colorbar canvas. HorizontalPanel colorbarFrame = new HorizontalPanel(); colorbarFrame.setBorderWidth(3); Canvas colorbarCanvas = Canvas.createIfSupported(); Canvas colorbarTextCanvas = Canvas.createIfSupported(); colorbarCanvas.setWidth(30 + "px"); colorbarCanvas.setCoordinateSpaceHeight(SpectrumBrowser.SPEC_HEIGHT); colorbarCanvas.setCoordinateSpaceWidth(30); colorbarTextCanvas.setWidth(30 + "px"); colorbarCanvas.setHeight(SpectrumBrowser.SPEC_HEIGHT + "px"); colorbarTextCanvas.setCoordinateSpaceHeight(SpectrumBrowser.SPEC_HEIGHT); colorbarTextCanvas.setHeight(SpectrumBrowser.SPEC_HEIGHT + "px"); colorbarTextCanvas.setCoordinateSpaceWidth(30); int nStops = colorMap.getColorStopCount(); colorbarFrame.add(colorbarCanvas); colorbarFrame.add(colorbarTextCanvas); spectrogramPanel.add(colorbarFrame); verticalPanel.add(spectrogramPanel); double rectHeight = (double) SpectrumBrowser.SPEC_HEIGHT / (double) nStops; int i = 0; for (ColorStop colorStop : colorMap.getColorStops()) { CssColor color = colorStop.cssColor; Context2d context = colorbarCanvas.getContext2d(); context.setFillStyle(color); double y = SpectrumBrowser.SPEC_HEIGHT - (i + 1) * rectHeight; context.fillRect(0, y, 30, (int) rectHeight); Context2d textContext = colorbarTextCanvas.getContext2d(); textContext.setTextAlign(TextAlign.LEFT); textContext.fillText(Integer.toString((int) colorStop.stopValue), 0, (int) (y + rectHeight / 2)); i++; } occupancyPanel = new HorizontalPanel(); VerticalPanel pad = new VerticalPanel(); pad.setWidth("25px"); occupancyPanel.add(pad); spectrumPanel = new HorizontalPanel(); ChartLoader chartLoader = new ChartLoader(ChartPackage.CORECHART); chartLoader.loadApi(new Runnable() { @Override public void run() { chartApiLoaded = true; } }); verticalPanel.add(occupancyPanel); verticalPanel.add(spectrumPanel); context2d = spectrogramCanvas.getContext2d(); openWebSocket(); } catch (Throwable th) { logger.log(Level.SEVERE, "ERROR drawing screen", th); } }
From source file:jetbrains.jetpad.projectional.domUtil.TextMetricsCalculator.java
License:Apache License
private static int measureHeight(Font font, String text) { Canvas canvas = canvas();//w w w.j a va 2 s . c om Context2d ctx = canvas.getContext2d(); ctx.setFont(getFontString(font)); ctx.setFillStyle("rgb(255, 0, 0)"); int width = (int) ctx.measureText(text).getWidth(); int canvasHeight = font.getSize() * 2; canvas.setHeight(canvasHeight + "px"); canvas.setHeight(font.getSize() * 2 + "px"); canvas.setWidth(width + "px"); ctx.fillText(text, 0, font.getSize()); ImageData data = ctx.getImageData(0, 0, width, canvasHeight); int firstY = canvasHeight - 1; int lastY = 0; for (int x = 0; x < width; x++) { for (int y = 0; y < canvasHeight; y++) { int red = data.getRedAt(x, y); if (red != 0) { if (firstY > y) { firstY = y; } if (lastY < y) { lastY = y; } } } } return lastY - firstY; }