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

Introduction

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

Prototype

public native void beginPath() ;

Source Link

Document

Erases the current path and prepares it for a new path.

Usage

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

License:Apache License

@Override
protected void protectedPaint(Canvas c, double startX, double startY, MarkerIcon interactiveComp,
        double graphHeightCoords, int startXPx) {
    if (!tooltipAdded && interactiveComponent != null) {
        // Add tooltip lazily, as interactiveComponent is created lazily in
        // super.paint().
        Container container = new DefaultContainerImpl(interactiveComponent.getElement());
        String tooltipText = ((PageTransitionModel) markerModel).title;

        // A blank tooltip looks really odd. Try to find something to fill in
        // the text with.
        if (tooltipText == null || tooltipText.equals("")) {
            String url = ((PageTransitionModel) markerModel).url;
            tooltipText = (url == null || url.equals("")) ? "<blank page>" : url;
        }/*from w w w  .  j  a  v  a2s  . c o  m*/
        FastTooltip tip = new FastTooltip(container, tooltipText, resources);
        tip.getElement().getStyle().setProperty("cursor", "pointer");
        ClickEvent.addClickListener(this, tip.getElement(), new ClickListener() {

            public void onClick(ClickEvent event) {
                HoveringPopup popup = Monitor.getPopup();
                popup.setContentProvider(createTooltipPoupupContent());
                Div interactiveComponent = PageTransitionMarker.this.interactiveComponent;
                popup.show(interactiveComponent.getAbsoluteLeft(), interactiveComponent.getAbsoluteTop());
            }
        });

        interactiveComponent.getElement().appendChild(tip.getElement());
        tooltipAdded = true;
        interactiveComp.setVisible(true);
    }

    // TODO(zundel): alpha?
    Color strokeColor = new Color("#415086");
    c.setStrokeStyle(strokeColor);
    c.setLineWidth(1);
    c.beginPath();
    c.moveTo((int) startX, graphHeightCoords);
    c.lineTo((int) startX, 0);
    c.stroke();
    interactiveComp.moveTo(startXPx);
}

---