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## org.apache.fop.render.rtf.rtflib.rtfdoc
Class RtfExternalGraphic

    java.lang.Object
      org.apache.fop.render.rtf.rtflib.rtfdoc.RtfElement
          org.apache.fop.render.rtf.rtflib.rtfdoc.RtfExternalGraphic

    public class RtfExternalGraphic

extends RtfElement

Creates an RTF image from an external graphic file. This class belongs to the tag processing.

Supports relative path like "../test.gif", too (01-08-24)

Limitations:

- Only the image types PNG, JPEG and EMF are supported
- The GIF is supported, too, but will be converted to JPG
- Only the attributes SRC (required), WIDTH, HEIGHT, SCALING are supported
- The SCALING attribute supports (uniform | non-uniform)

Known Bugs:

- If the emf image has a desired size, the image will be clipped
- The emf, jpg & png image will not be displayed in correct size

This work was authored by Andreas Putz (a.putz@skynamics.com) and Gianugo Rabellino (gianugo@rabellino.it).

Nested Class Summary
`static class` | `RtfExternalGraphic.ExternalGraphicException` Exception thrown when an image file/URL cannot be read

Field Summary
`protected int` | `graphicCompressionRate` Graphic compression rate
`protected int` | `height` The height of the image (in pixels)
`protected int` | `heightDesired` The desired height (in twips)
`protected boolean` | `perCentH` Flag whether the desired height is a percentage
`protected boolean` | `perCentW` Flag whether the desired width is a percentage
`protected boolean` | `scaleUniform` Flag whether the image size shall be adjusted
`protected java.net.URL` | `url` The url of the image
`protected int` | `width` The width of the image (in pixels)
`protected int` | `widthDesired` The desired width (in twips)

Fields inherited from class org.apache.fop.render.rtf.rtflib.rtfdoc.RtfElement
`attrib, parent, writer`

Constructor Summary
`RtfExternalGraphic(RtfContainer container, java.io.Writer writer)` Default constructor.
`RtfExternalGraphic(RtfContainer container, java.io.Writer writer, RtfAttributes attributes)` Default constructor.

Method Summary
`int` | `getCompressionRate()` Gets the compression rate for the image in percent.
`boolean` | `isEmpty()`
`boolean` | `setCompressionRate(int percent)` Sets the compression rate for the image in percent.
`void` | `setCropping(int left, int top, int right, int bottom)` Sets cropping values for all four edges for the \piccrop*N commands.
`void` | `setHeight(java.lang.String theHeight)` Sets the desired height of the image.
`void` | `setHeightTwips(int twips)` Sets the desired height of the image.
`void` | `setImageData(byte[] data)` Sets the binary imagedata of the image.
`void` | `setScaling(java.lang.String value)` Sets the flag whether the image size shall be adjusted.
`void` | `setUniformScaling(boolean uniform)` Sets the flag whether the image size shall be adjusted.
`void` | `setURL(java.lang.String urlString)` Sets the url of the image.
`void` | `setWidth(java.lang.String theWidth)` Sets the desired width of the image.
`void` | `setWidthTwips(int twips)` Sets the desired width of the image.
`protected void` | `writeRtfContent()` RtfElement override - catches ExternalGraphicException and writes a warning message to the document if image cannot be read
`protected void` | `writeRtfContentWithException()` Writes the RTF content to m_writer - this one throws ExternalGraphicExceptions

Methods inherited from class org.apache.fop.render.rtf.rtflib.rtfdoc.RtfElement
`close, getParentOfClass, getRtfAttributes, newLine, okToWriteRtf, toString, writeAttributes, writeControlWord, writeControlWordNS, writeExceptionInRtf, writeGroupMark, writeOneAttribute, writeOneAttributeNS, writeRtf, writeRtfPrefix, writeRtfSuffix, writeStarControlWord, writeStarControlWordNS`

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

Field Detail

### url

    protected java.net.URL url

  The url of the image

### height

    protected int height

  The height of the image (in pixels)

### heightDesired

    protected int heightDesired

  The desired height (in twips)

### perCentH

    protected boolean perCentH

  Flag whether the desired height is a percentage

### width

    protected int width

  The width of the image (in pixels)

### widthDesired

    protected int widthDesired

  The desired width (in twips)

### perCentW

    protected boolean perCentW

  Flag whether the desired width is a percentage

### scaleUniform

    protected boolean scaleUniform

  Flag whether the image size shall be adjusted

### graphicCompressionRate

    protected int graphicCompressionRate

  Graphic compression rate

Constructor Detail

### RtfExternalGraphic

    public RtfExternalGraphic(RtfContainer container,
                              java.io.Writer writer)
                       throws java.io.IOException

  Default constructor. Create an RTF element as a child of given container.

  Parameters:
    `container` - a `RtfContainer` value
    `writer` - a `Writer` value
  Throws:
    `java.io.IOException` - for I/O problems

### RtfExternalGraphic

    public RtfExternalGraphic(RtfContainer container,
                              java.io.Writer writer,
                              RtfAttributes attributes)
                       throws java.io.IOException

  Default constructor.

  Parameters:
    `container` - a `RtfContainer` value
    `writer` - a `Writer` value
    `attributes` - a `RtfAttributes` value
  Throws:
    `java.io.IOException` - for I/O problems

Method Detail

### writeRtfContent

    protected void writeRtfContent()
                            throws java.io.IOException

  RtfElement override - catches ExternalGraphicException and writes a warning message to the document if image cannot be read

  Specified by:
    `writeRtfContent` in class `RtfElement`
  Throws:
    `java.io.IOException` - for I/O problems

### writeRtfContentWithException

    protected void writeRtfContentWithException()
                                         throws java.io.IOException

  Writes the RTF content to m_writer - this one throws ExternalGraphicExceptions

  Throws:
    `java.io.IOException` - On error

### setHeight

    public void setHeight(java.lang.String theHeight)

  Sets the desired height of the image.

  Parameters:
    `theHeight` - The desired image height (as a string in twips or as a percentage)

### setWidth

    public void setWidth(java.lang.String theWidth)

  Sets the desired width of the image.

  Parameters:
    `theWidth` - The desired image width (as a string in twips or as a percentage)

### setWidthTwips

    public void setWidthTwips(int twips)

  Sets the desired width of the image.

  Parameters:
    `twips` - The desired image width (in twips)

### setHeightTwips

    public void setHeightTwips(int twips)

  Sets the desired height of the image.

  Parameters:
    `twips` - The desired image height (in twips)

### setScaling

    public void setScaling(java.lang.String value)

  Sets the flag whether the image size shall be adjusted.

  Parameters:
    `value` - true image width or height shall be adjusted automatically\n false no adjustment

### setUniformScaling

    public void setUniformScaling(boolean uniform)

  Sets the flag whether the image size shall be adjusted.

  Parameters:
    `uniform` - true image width or height shall be adjusted automatically\n false no adjustment

### setCropping

    public void setCropping(int left,
                            int top,
                            int right,
                            int bottom)

  Sets cropping values for all four edges for the \piccrop*N commands. A positive value crops toward the center of the picture; a negative value crops away from the center, adding a space border around the picture

  Parameters:
    `left` - left cropping value (in twips)
    `top` - top cropping value (in twips)
    `right` - right cropping value (in twips)
    `bottom` - bottom cropping value (in twips)

### setImageData

    public void setImageData(byte[] data)
                      throws java.io.IOException

  Sets the binary imagedata of the image.

  Parameters:
    `data` - binary imagedata as read from file.
  Throws:
    `java.io.IOException` - On error

### setURL

    public void setURL(java.lang.String urlString)
                throws java.io.IOException

  Sets the url of the image.

  Parameters:
    `urlString` - Image url like "file://..."
  Throws:
    `java.io.IOException` - On error

### getCompressionRate

    public int getCompressionRate()

  Gets the compression rate for the image in percent.

  Returns:
    Compression rate

### setCompressionRate

    public boolean setCompressionRate(int percent)

  Sets the compression rate for the image in percent.

  Parameters:
    `percent` - Compression rate
  Returns:
    true if the compression rate is valid (0..100), false if invalid

### isEmpty

    public boolean isEmpty()

  Specified by:
    `isEmpty` in class `RtfElement`
  Returns:
    true if this element would generate no "useful" RTF content

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