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## org.biojava.bio.gui.sequence
Class RectangularImapRenderer

    java.lang.Object
      org.biojava.bio.gui.sequence.RectangularImapRenderer

All Implemented Interfaces:
  Serializable, BeadFeatureRenderer, FeatureRenderer, ImageMapRenderer

    public class RectangularImapRenderer

extends Object
implements BeadFeatureRenderer, ImageMapRenderer, Serializable

`RectangularImapRenderer` is a decorator for `RectangularBeadRenderer` which adds the ability to create HTML image map coordinates which correspond to the feature rendering produced by the `RectangularBeadRenderer`.

Since:
  1.3
Author:
  Keith James
See Also:
  Serialized Form

Constructor Summary
`RectangularImapRenderer(RectangularBeadRenderer renderer, ImageMap imageMap, URLFactory urlFactory)` Creates a new `RectangularImapRenderer`.

Method Summary
`double` | `getBeadDepth()` `getBeadDepth` returns the depth of a single bead produced by the renderer.
`double` | `getBeadDisplacement()` `getBeadDisplacement` returns the displacement of beads from the centre line of the renderer.
`double` | `getDepth(SequenceRenderContext context)`
`boolean` | `getHeightScaling()` `getHeightScaling` returns the state of the height scaling policy.
`ImageMap` | `getImageMap()` `getImageMap` returns the current image map.
`FeatureHolder` | `processMouseEvent(FeatureHolder holder, SequenceRenderContext context, MouseEvent mEvent)`
`void` | `renderBead(Graphics2D g2, Feature f, SequenceRenderContext context)` `renderBead` should implement rendering for this bead type only.
`void` | `renderFeature(Graphics2D g2, Feature f, SequenceRenderContext context)`
`void` | `renderImageMap(Graphics2D g2, Feature f, SequenceRenderContext context)` `renderImageMap` writes a set of image map coordinates corresponding to the rectangle drawn by the renderer.
`void` | `setDelegateRenderer(OptimizableFilter filter, BeadFeatureRenderer renderer)` `setDelegateRenderer` for the specified filter.
`void` | `setHeightScaling(boolean isEnabled)` `setHeightScaling` sets the height scaling policy.
`void` | `setImageMap(ImageMap imageMap)` `setImageMap` sets the current image map.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### RectangularImapRenderer

    public RectangularImapRenderer(RectangularBeadRenderer renderer,
                                   ImageMap imageMap,
                                   URLFactory urlFactory)

  Creates a new `RectangularImapRenderer`.

  Parameters:
    `renderer` - a `RectangularBeadRenderer`.
    `imageMap` - an `ImageMap`.
    `urlFactory` - a `URLFactory` which should be capable of creating a suitable URL from each `Feature` on the `Sequence` to be rendered.

Method Detail

### getImageMap

    public ImageMap getImageMap()

  `getImageMap` returns the current image map.

  Returns:
    an `ImageMap`.

### setImageMap

    public void setImageMap(ImageMap imageMap)

  `setImageMap` sets the current image map.

  Parameters:
    `imageMap` - an `ImageMap`.

### setDelegateRenderer

    public void setDelegateRenderer(OptimizableFilter filter,
                                    BeadFeatureRenderer renderer)

  `setDelegateRenderer` for the specified filter.

  Specified by:
    `setDelegateRenderer` in interface `BeadFeatureRenderer`
  Parameters:
    `filter` - an `OptimizableFilter`.
    `renderer` - a `BeadFeatureRenderer`.

### renderImageMap

    public void renderImageMap(Graphics2D g2,
                               Feature f,
                               SequenceRenderContext context)

  `renderImageMap` writes a set of image map coordinates corresponding to the rectangle drawn by the renderer. The hotspots created by this method have the rendered `Feature` set as their user object.

  This method is called by `renderFeature` when a raster image is rendered.

  Specified by:
    `renderImageMap` in interface `ImageMapRenderer`
  Parameters:
    `g2` - a `Graphics2D`.
    `f` - a `Feature`.
    `context` - a `SequenceRenderContext`.

### renderFeature

    public void renderFeature(Graphics2D g2,
                              Feature f,
                              SequenceRenderContext context)

  Specified by:
    `renderFeature` in interface `FeatureRenderer`

### renderBead

    public void renderBead(Graphics2D g2,
                           Feature f,
                           SequenceRenderContext context)

  Description copied from interface: `BeadFeatureRenderer`
  `renderBead` should implement rendering for this bead type only. The `renderFeature` method is expected to handle the calls to delegate renderers.

  Specified by:
    `renderBead` in interface `BeadFeatureRenderer`
  Parameters:
    `g2` - a `Graphics2D`.
    `f` - a `Feature` to render.
    `context` - a `SequenceRenderContext` context.

### getDepth

    public double getDepth(SequenceRenderContext context)

  Specified by:
    `getDepth` in interface `FeatureRenderer`

### getBeadDepth

    public double getBeadDepth()

  Description copied from interface: `BeadFeatureRenderer`
  `getBeadDepth` returns the depth of a single bead produced by the renderer.

  Specified by:
    `getBeadDepth` in interface `BeadFeatureRenderer`
  Returns:
    a `double`.

### getBeadDisplacement

    public double getBeadDisplacement()

  Description copied from interface: `BeadFeatureRenderer`
  `getBeadDisplacement` returns the displacement of beads from the centre line of the renderer. A positive value indicates displacment downwards (for horizontal renderers) or to the right (for vertical renderers).

  Specified by:
    `getBeadDisplacement` in interface `BeadFeatureRenderer`
  Returns:
    a `double`.

### getHeightScaling

    public boolean getHeightScaling()

  `getHeightScaling` returns the state of the height scaling policy.

  Returns:
    a `boolean` true if height scaling is enabled.

### setHeightScaling

    public void setHeightScaling(boolean isEnabled)
                          throws ChangeVetoException

  `setHeightScaling` sets the height scaling policy. Default behaviour is for this to be enabled leading to features being drawn with a height equal to half their width, subject to a maximum height restriction equal to the `beadDepth` set in the constructor. If disabled, features will always be drawn at the maximum height allowed by the `beadDepth` parameter.

  Parameters:
    `isEnabled` - a `boolean`.
  Throws:
    `ChangeVetoException` - if an error occurs.

### processMouseEvent

    public FeatureHolder processMouseEvent(FeatureHolder holder,
                                           SequenceRenderContext context,
                                           MouseEvent mEvent)

  Specified by:
    `processMouseEvent` in interface `FeatureRenderer`

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