org.apache.fop.area

## Class RegionViewport

- java.lang.Object
- - org.apache.fop.area.AreaTreeObject
  - - org.apache.fop.area.Area
    - - org.apache.fop.area.RegionViewport

- All Implemented Interfaces:
    Serializable, Cloneable, Viewport

      public class RegionViewport
      extends Area
      implements Viewport

  Region Viewport area. This object represents the region-viewport-area. It has a region-reference-area as its child. These areas are described in the fo:region-body description in the XSL Recommendation.
  See Also:
    Serialized Form

- - ### Field Summary

    - ### Fields inherited from class org.apache.fop.area.Area

      `bidiLevel, bpd, CLASS_ABSOLUTE, CLASS_BEFORE_FLOAT, CLASS_FIXED, CLASS_FOOTNOTE, CLASS_MAX, CLASS_NORMAL, CLASS_SIDE_FLOAT, effectiveIPD, ipd, log, ORIENT_0, ORIENT_180, ORIENT_270, ORIENT_90, traits`

    - ### Fields inherited from class org.apache.fop.area.AreaTreeObject

      `extensionAttachments, foreignAttributes`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `RegionViewport(Rectangle2D viewArea)` Create a new region-viewport-area

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `Object` | `clone()`
    `Rectangle` | `getClipRectangle()` Returns the clipping rectangle of this viewport area.
    `RegionReference` | `getRegionReference()` Get the region-reference-area for this region viewport.
    `Rectangle2D` | `getViewArea()` Get the view area of this viewport.
    `boolean` | `hasClip()` Returns true if this area will clip overflowing content.
    `void` | `setClip(boolean c)` Set the clipping for this region viewport.
    `void` | `setRegionReference(RegionReference reg)` Set the region-reference-area for this region viewport.
    `void` | `setWritingModeTraits(WritingModeTraitsGetter wmtg)` Sets the writing mode traits for the region reference of this region viewport

    - ### Methods inherited from class org.apache.fop.area.Area

      `activateEffectiveIPD, addChildArea, addTrait, getAllocBPD, getAllocIPD, getAreaClass, getBidiLevel, getBorderAndPaddingWidthAfter, getBorderAndPaddingWidthBefore, getBorderAndPaddingWidthEnd, getBorderAndPaddingWidthStart, getBPD, getChangeBarList, getEffectiveAllocIPD, getEffectiveIPD, getIPD, getSpaceAfter, getSpaceBefore, getSpaceEnd, getSpaceStart, getTrait, getTraitAsBoolean, getTraitAsInteger, getTraits, hasTrait, hasTraits, resetBidiLevel, setAreaClass, setBidiLevel, setBPD, setChangeBarList, setIPD, setTraits, toString`

    - ### Methods inherited from class org.apache.fop.area.AreaTreeObject

      `addExtensionAttachment, getExtensionAttachments, getForeignAttributes, getForeignAttributeValue, hasExtensionAttachments, setExtensionAttachments, setForeignAttribute, setForeignAttributes`

    - ### Methods inherited from class java.lang.Object

      `equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

- - ### Constructor Detail

    - #### RegionViewport

          public RegionViewport(Rectangle2D viewArea)

      Create a new region-viewport-area
      Parameters:
        `viewArea` - the view area of this viewport

  - ### Method Detail

    - #### setRegionReference

          public void setRegionReference(RegionReference reg)

      Set the region-reference-area for this region viewport.
      Parameters:
        `reg` - the child region-reference-area inside this viewport

    - #### getRegionReference

          public RegionReference getRegionReference()

      Get the region-reference-area for this region viewport.
      Returns:
        the child region-reference-area inside this viewport

    - #### setClip

          public void setClip(boolean c)

      Set the clipping for this region viewport.
      Parameters:
        `c` - the clipping value

    - #### hasClip

          public boolean hasClip()

      Returns true if this area will clip overflowing content.
      Specified by:
        `hasClip` in interface `Viewport`
      Returns:
        `true` if the overflow trait has the value "hidden", "scroll" or "error-if-overflow"

    - #### getClipRectangle

          public Rectangle getClipRectangle()

      Returns the clipping rectangle of this viewport area.
      Specified by:
        `getClipRectangle` in interface `Viewport`
      Returns:
        the clipping rectangle expressed in the viewport's coordinate system, or null if clipping is disabled

    - #### getViewArea

          public Rectangle2D getViewArea()

      Get the view area of this viewport.
      Returns:
        the viewport rectangle area

    - #### clone

          public Object clone()
                       throws CloneNotSupportedException

      Overrides:
        `clone` in class `Area`
      Throws:
        `CloneNotSupportedException`

    - #### setWritingModeTraits

          public void setWritingModeTraits(WritingModeTraitsGetter wmtg)

      Sets the writing mode traits for the region reference of this region viewport
      Overrides:
        `setWritingModeTraits` in class `Area`
      Parameters:
        `wmtg` - a WM traits getter

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