Class BoxRenderer


  • public class BoxRenderer
    extends java.lang.Object

    Renders an XML files, formatted with CSS, as an Box. Input is a document in the form of file or URL, and output is the root of the Box model. A BoxRenderer is not intended to be re-used for multiple document sources; just create new BoxRenderers for each one you need. BoxRenderer is not thread-safe. Standard usage pattern is

     File xhtml = ...
     BoxRenderer rend = new BoxRenderer(xhtml);
     Box rootBox = rend.render();
     

    The document is not loaded, and layout and render don't take place, until render() is called. Subsequent calls to render() don't result in a reload; create a new BoxRenderer instance to do so.

    As with RootPanel, you can access the SharedContext instance that will be used by this renderer and change settings to control the rendering process; use getSharedContext().

    Not thread-safe.

    See Also:
    ITextRenderer
    • Constructor Summary

      Constructors 
      Constructor Description
      BoxRenderer​(java.io.File file, int width)
      Creates a new instance for a given File.
      BoxRenderer​(java.io.File file, int width, int height)
      Creates a new instance for a given File.
      BoxRenderer​(java.lang.String url, int width)
      Renderer for a given URL (which is also used as the base) and a specified width; height is calculated automatically.
      BoxRenderer​(java.lang.String url, int width, int height)
      Renderer for a given URL and a specified width; height is calculated automatically.
      BoxRenderer​(java.lang.String url, java.lang.String baseurl, int width)
      Renderer for a given URL and a specified width; height is calculated automatically.
      BoxRenderer​(java.lang.String url, java.lang.String baseUrl, int width, int height)
      Creates a new instance for a given URL.
    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      LayoutContext getLayoutContext()
      Returns the LayoutContext to be used by renderer.
      SharedContext getSharedContext()
      Returns the SharedContext to be used by renderer.
      Box render()
      Renders the XML document if necessary and returns the root Box.
      void setRenderingHints​(java.util.Map hints)
      Sets the rendering hints to apply to the Graphics2D instance used by the renderer; see Graphics2D.setRenderingHints(java.util.Map).
      • Methods inherited from class java.lang.Object

        equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Constructor Detail

      • BoxRenderer

        public BoxRenderer​(java.lang.String url,
                           java.lang.String baseUrl,
                           int width,
                           int height)
        Creates a new instance for a given URL. Does not render until render() is called for the first time.
        Parameters:
        url - The location of the document to be rendered.
        baseUrl - The base url for the document, against which relative paths are resolved.
        width - Target width, in pixels, for the image; required to provide horizontal bounds for the layout.
      • BoxRenderer

        public BoxRenderer​(java.io.File file,
                           int width,
                           int height)
                    throws java.io.IOException
        Creates a new instance for a given File. Does not render until render() is called for the first time.
        Parameters:
        file - The file to be rendered.
        width - Target width, in pixels, for the image; required to provide horizontal bounds for the layout.
        height - Target height, in pixels, for the image
        Throws:
        java.io.IOException
      • BoxRenderer

        public BoxRenderer​(java.io.File file,
                           int width)
                    throws java.io.IOException
        Creates a new instance for a given File. Does not render until render() is called for the first time.
        Parameters:
        file - The file to be rendered.
        width - Target width, in pixels, for the image; required to provide horizontal bounds for the layout. Heght is calculated based on content
        Throws:
        java.io.IOException
      • BoxRenderer

        public BoxRenderer​(java.lang.String url,
                           int width)
        Renderer for a given URL (which is also used as the base) and a specified width; height is calculated automatically.
        Parameters:
        url - The location of the document to be rendered.
        width - Target width, in pixels, for the image; required to provide horizontal bounds for the layout. Heght is calculated based on content
      • BoxRenderer

        public BoxRenderer​(java.lang.String url,
                           java.lang.String baseurl,
                           int width)
        Renderer for a given URL and a specified width; height is calculated automatically.
        Parameters:
        url - The location of the document to be rendered.
        baseurl - The base url for the document, against which relative paths are resolved.
        width - Target width, in pixels, for the image; required to provide horizontal bounds for the layout. Heght is calculated based on content
      • BoxRenderer

        public BoxRenderer​(java.lang.String url,
                           int width,
                           int height)
        Renderer for a given URL and a specified width; height is calculated automatically.
        Parameters:
        url - The location of the document to be rendered.
        width - Target width, in pixels, for the image; required to provide horizontal bounds for the layout.
        height - Target height, in pixels, for the image
    • Method Detail

      • setRenderingHints

        public void setRenderingHints​(java.util.Map hints)
        Sets the rendering hints to apply to the Graphics2D instance used by the renderer; see Graphics2D.setRenderingHints(java.util.Map). The Map need not specify values for all properties; any settings in this map will be applied as override to the default settings, and will not replace the entire Map for the Graphics2D instance.
        Parameters:
        hints - values to override in default rendering hints for Graphics2D we are rendering to
      • getSharedContext

        public SharedContext getSharedContext()
        Returns the SharedContext to be used by renderer. Is instantiated along with the class, so can be accessed before render() is called to tune the rendering process.
        Returns:
        the SharedContext instance that will be used by this renderer
      • getLayoutContext

        public LayoutContext getLayoutContext()
        Returns the LayoutContext to be used by renderer. Is instantiated along with the class, so can be accessed before render() is called to tune the rendering process.
        Returns:
        the LayoutContext instance that will be used by this renderer
      • render

        public Box render()
        Renders the XML document if necessary and returns the root Box. If already rendered, same Box reference will be returned.
        Returns:
        The XML rendered as a Box.