org.apache.fop.area

## Class BlockParent

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

- All Implemented Interfaces:
    java.io.Serializable, java.lang.Cloneable
  Direct Known Subclasses:
    BeforeFloat, Block, Footnote, NormalFlow

      public class BlockParent
      extends Area

  A BlockParent holds block-level areas.
  See Also:
    Serialized Form

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `protected java.util.List<Area>` | `children` The children of this block parent area.
    `protected int` | `xOffset` The x offset position of this block parent.
    `protected int` | `yOffset` The y offset position of this block parent.

    - ### 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
    `BlockParent()`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `activateEffectiveIPD()`
    `void` | `addBlock(Block block)` Add the block area to this block parent.
    `void` | `addChildArea(Area childArea)` Add a child to this area.
    `java.util.List` | `getChildAreas()` Get the list of child areas for this block area.
    `int` | `getEffectiveIPD()`
    `int` | `getXOffset()` Get the X offset of this block parent area.
    `int` | `getYOffset()` Get the Y offset of this block parent area.
    `boolean` | `isEmpty()` Check whether there are child areas.
    `void` | `setXOffset(int off)` Set the X offset of this block parent area.
    `void` | `setYOffset(int off)` Set the Y offset of this block parent area.

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

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

- - ### Field Detail

    - #### xOffset

          protected int xOffset

      The x offset position of this block parent. Used for relative (serves as left-offset trait) and absolute positioning (serves as left-position trait).

    - #### yOffset

          protected int yOffset

      The y offset position of this block parent. Used for relative (serves as top-offset trait) and absolute positioning (serves as top-position trait).

    - #### children

          protected java.util.List<Area> children

      The children of this block parent area.

  - ### Constructor Detail

    - #### BlockParent

          public BlockParent()

  - ### Method Detail

    - #### addChildArea

          public void addChildArea(Area childArea)

      Add a child to this area. The default is to do nothing. Subclasses must override to do something if they can have child areas.
      Overrides:
        `addChildArea` in class `Area`
      Parameters:
        `childArea` - the child area to add

    - #### addBlock

          public void addBlock(Block block)

      Add the block area to this block parent.
      Parameters:
        `block` - the child block area to add

    - #### getChildAreas

          public java.util.List getChildAreas()

      Get the list of child areas for this block area.
      Returns:
        the list of child areas

    - #### isEmpty

          public boolean isEmpty()

      Check whether there are child areas.
      Returns:
        the result.

    - #### setXOffset

          public void setXOffset(int off)

      Set the X offset of this block parent area.
      Parameters:
        `off` - the x offset of the block parent area

    - #### setYOffset

          public void setYOffset(int off)

      Set the Y offset of this block parent area.
      Parameters:
        `off` - the y offset of the block parent area

    - #### getXOffset

          public int getXOffset()

      Get the X offset of this block parent area.
      Returns:
        the x offset of the block parent area

    - #### getYOffset

          public int getYOffset()

      Get the Y offset of this block parent area.
      Returns:
        the y offset of the block parent area

    - #### getEffectiveIPD

          public int getEffectiveIPD()

      Overrides:
        `getEffectiveIPD` in class `Area`

    - #### activateEffectiveIPD

          public void activateEffectiveIPD()

      Overrides:
        `activateEffectiveIPD` in class `Area`

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