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

Introduction

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

Prototype

public final native void setFont(String f) ;

Source Link

Document

Sets the font.

Usage

From source file:org.primaresearch.web.gwt.client.ui.page.renderer.PageRenderer.java

License:Apache License

public int measureTextWidth(String text, String font) {
    Context2d context = canvas.getContext2d();
    context.setFont(font);
    return (int) context.measureText(text).getWidth();
}

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From source file:org.rstudio.core.client.widget.FontDetector.java

License:Open Source License

public static boolean isFontSupported(String fontName) {
    SimplePanel panel = null;/*w  ww .  j  a v a2  s. c  o  m*/
    try {
        // default font name as a reference point
        final String defaultFontName = "Arial";
        if (defaultFontName.equals(fontName))
            return true;

        // make sure canvas is supported
        if (!Canvas.isSupported())
            return false;

        // add a temporary div to the dom
        panel = new SimplePanel();
        panel.setHeight("200px");
        panel.getElement().getStyle().setVisibility(Visibility.HIDDEN);
        panel.getElement().getStyle().setOverflow(Overflow.SCROLL);
        RootPanel.get().add(panel, -2000, -2000);

        // add a canvas element to the div and get the 2d drawing context
        final Canvas canvas = Canvas.createIfSupported();
        canvas.setWidth("512px");
        canvas.setHeight("64px");
        canvas.getElement().getStyle().setLeft(400, Unit.PX);
        canvas.getElement().getStyle().setBackgroundColor("#ffe");
        panel.add(canvas);
        final Context2d ctx = canvas.getContext2d();
        ctx.setFillStyle("#000000");

        // closure to generate a hash for a font
        class HashGenerator {
            public String getHash(String fontName) {
                ctx.setFont("57px " + fontName + ", " + defaultFontName);
                int width = canvas.getOffsetWidth();
                int height = canvas.getOffsetHeight();
                ctx.clearRect(0, 0, width, height);
                ctx.fillText("TheQuickBrownFox", 2, 50);
                return canvas.toDataUrl();
            }
        }
        ;

        // get hashes and compare them
        HashGenerator hashGenerator = new HashGenerator();
        String defaultHash = hashGenerator.getHash(defaultFontName);
        String fontHash = hashGenerator.getHash(fontName);
        return !defaultHash.equals(fontHash);
    } catch (Exception ex) {
        Debug.log(ex.toString());
        return false;
    } finally {
        if (panel != null)
            RootPanel.get().remove(panel);
    }
}

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From source file:playn.html.HtmlTextLayout.java

License:Apache License

void configContext(Context2d ctx) {
    Font font = getFont(format);//from ww  w. j  av a  2s .c  o m
    String style = "";
    switch (font.style()) {
    case BOLD:
        style = "bold";
        break;
    case ITALIC:
        style = "italic";
        break;
    case BOLD_ITALIC:
        style = "bold italic";
        break;
    }

    ctx.setFont(style + " " + font.size() + "px " + font.name());
    ctx.setTextBaseline(Context2d.TextBaseline.TOP);
}

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From source file:playn.html.OldHtmlTextLayout.java

License:Apache License

void configContext(Context2d ctx) {
    HtmlFont font = getFont(format);/*from  www  .j  a  v a2  s .  c  o m*/
    String style = "";
    switch (font.style()) {
    case BOLD:
        style = "bold";
        break;
    case ITALIC:
        style = "italic";
        break;
    case BOLD_ITALIC:
        style = "bold italic";
        break;
    default:
        break; // nada
    }

    ctx.setFont(style + " " + font.size() + "px " + font.name());
    ctx.setTextBaseline(Context2d.TextBaseline.TOP);
}

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From source file:stroom.pipeline.structure.client.view.PipelineElementRenderer.java

License:Apache License

private void drawText(final Context2d ctx, final double x, final double y, final PipelineElement element) {
    final CssColor fill = CssColor.make(textColor);

    ctx.setFont(font);
    ctx.setTextAlign(TextAlign.LEFT);//from   w  w w.j a  v  a2s. c  o  m
    ctx.setFillStyle(fill);
    ctx.fillText(element.getId(), x, y);
}

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From source file:stroom.widget.htree.client.TextCellRenderer.java

License:Apache License

private void drawText(final Context2d ctx, final Bounds bounds, final String text) {
    final CssColor fill = CssColor.make(textColor);

    ctx.setFont(font);
    ctx.setTextAlign(TextAlign.LEFT);//w ww  .  ja v  a  2 s  .c  o m
    ctx.setFillStyle(fill);
    ctx.fillText(text, bounds.getX() + textPadding, bounds.getY() + textPadding + textSize - 1);
}

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