Example usage for com.google.gwt.graphics.client Canvas Canvas

Introduction

In this page you can find the example usage for com.google.gwt.graphics.client Canvas Canvas.

Prototype

public Canvas(int coordX, int coordY) 

Source Link

Document

Creates a Canvas element.

Usage

From source file:com.google.speedtracer.client.timeline.TimeLineGraph.java

License:Apache License

protected TimeLineGraph(TimeLine parent, double leftBound, double rightBound, int precision) {

    super(new DefaultContainerImpl(parent.getGraphContainerElement()));
    timeLine = parent;//from  ww w  .j av  a2s  . com

    Element elem = getElement();

    // Canvas for drawing the graph.
    canvas = new Canvas(COORD_X_WIDTH, COORD_Y_HEIGHT);
    Element canvasElem = canvas.getElement();

    elem.appendChild(canvasElem);

    this.leftBound = leftBound;
    this.rightBound = rightBound;
    this.plotPrecision = precision;
    this.lodPlotPrecision = plotPrecision / 2;
    recomputeDomain();
}

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From source file:com.google.speedtracer.client.view.GraphCallout.java

License:Apache License

public GraphCallout(GraphCalloutModel calloutModel, MainTimeLine mainTimeline,
        GraphCallout.Resources resources) {
    this.css = resources.currentSelectionMarkerCss();
    this.mainTimeline = mainTimeline;
    this.parentElement = mainTimeline.getGraphContainerElement();

    // Create a canvas to draw the leader.
    canvas = new Canvas(css.leadWidth(), css.leadHeight());
    canvas.getElement().setClassName(css.lead());

    // Add containers for the label text and the duration box.
    DocumentExt document = parentElement.getOwnerDocument().cast();
    label = document.createDivWithClassName(css.label());
    element = document.createDivWithClassName(css.duration());
    element.appendChild(canvas.getElement());
    element.appendChild(label);//  www.  ja  v  a2  s.  c  o m
    parentElement.appendChild(element);

    calloutModel.addModelChangeListener(this);
}

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From source file:com.google.speedtracer.client.visualizations.view.EventTraceBreakdown.java

License:Apache License

public Element cloneRenderedCanvasElement() {
    ensureMasterIsRendered();//  ww w.  j  av a 2  s  .c  o  m
    int width = (int) (rootEvent.getDuration() * domainToPixels);
    final Canvas canvas = new Canvas(width, COORD_HEIGHT);
    canvas.setLineWidth(2);
    final Element element = canvas.getElement();
    element.setClassName(resources.eventTraceBreakdownCss().masterRender());
    element.getStyle().setPropertyPx("width", width);
    new Renderer(canvas, rootEvent).renderSelfAndChildren();
    return element;
}

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From source file:com.google.speedtracer.client.visualizations.view.EventTraceBreakdown.java

License:Apache License

public Renderer createRenderer(UiEvent event, int depth) {
    ensureMasterIsRendered();//ww  w.  j av  a 2 s .c om
    int width = (int) (event.getDuration() * domainToPixels);
    // We may have truncated something that, on aggregate may matter.
    // If this node has a dominant color set, then it contains a child that is
    // one of the important ones... show it with a 1 pixel bar.
    if (width == 0 && presenter.hasDominantType(event, rootEvent, domainToPixels)) {
        width = 1;
    }

    Css css = resources.eventTraceBreakdownCss();

    final Canvas canvas = new Canvas(width, COORD_HEIGHT);
    canvas.setLineWidth(2);
    final Element element = canvas.getElement();
    final Style style = element.getStyle();
    element.setClassName(css.eventGraph());
    style.setPropertyPx("left", getLeftOffset(event, depth));
    style.setPropertyPx("width", width);

    return new Renderer(canvas, event);
}

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From source file:com.google.speedtracer.client.visualizations.view.EventTraceBreakdown.java

License:Apache License

private void ensureMasterIsRendered() {
    if (masterCanvasElement != null) {
        return;/*from  www  .  j  a  va2 s  . c o m*/
    }

    // See comment in renderNode.
    final JsIntegerDoubleMap accumlatedErrorByType = JsIntegerDoubleMap.create();
    final Canvas canvas = new Canvas(MASTER_COORD_WIDTH, COORD_HEIGHT);
    traverseAndRender(canvas, null, rootEvent, accumlatedErrorByType);
    masterCanvasElement = canvas.getElement();
}

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From source file:org.gwt.speedchart.client.graph.AbstractGraph.java

License:Open Source License

protected AbstractGraph(int width, int height, ChartUiProps chartUiProps) {
    this.chartUiProps = chartUiProps;
    COORD_X_WIDTH = width;//from  ww  w.ja v a2s.c  om
    COORD_Y_HEIGHT = height;
    canvas = new Canvas(COORD_X_WIDTH, COORD_Y_HEIGHT);
    setElement(canvas.getElement());
}

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