javax.print.attribute.standard

## Class MediaPrintableArea

- java.lang.Object
- - javax.print.attribute.standard.MediaPrintableArea

- All Implemented Interfaces:
    Serializable, Attribute, DocAttribute, PrintJobAttribute, PrintRequestAttribute

      public final class MediaPrintableArea
      extends Object
      implements DocAttribute, PrintRequestAttribute, PrintJobAttribute

  Class MediaPrintableArea is a printing attribute used to distinguish the printable and non-printable areas of media.

  The printable area is specified to be a rectangle, within the overall dimensions of a media.

  Most printers cannot print on the entire surface of the media, due to printer hardware limitations. This class can be used to query the acceptable values for a supposed print job, and to request an area within the constraints of the printable area to be used in a print job.

  To query for the printable area, a client must supply a suitable context. Without specifying at the very least the size of the media being used no meaningful value for printable area can be obtained.

  The attribute is not described in terms of the distance from the edge of the paper, in part to emphasise that this attribute is not independent of a particular media, but must be described within the context of a choice of other attributes. Additionally it is usually more convenient for a client to use the printable area.

  The hardware's minimum margins is not just a property of the printer, but may be a function of the media size, orientation, media type, and any specified finishings. `PrintService` provides the method to query the supported values of an attribute in a suitable context : See ``PrintService.getSupportedAttributeValues()``

  The rectangular printable area is defined thus: The (x,y) origin is positioned at the top-left of the paper in portrait mode regardless of the orientation specified in the requesting context. For example a printable area for A4 paper in portrait or landscape orientation will have height > width.

  A printable area attribute's values are stored internally as integers in units of micrometers (µm), where 1 micrometer = 10-6 meter = 1/1000 millimeter = 1/25400 inch. This permits dimensions to be represented exactly to a precision of 1/1000 mm (= 1 µm) or 1/100 inch (= 254 µm). If fractional inches are expressed in negative powers of two, this permits dimensions to be represented exactly to a precision of 1/8 inch (= 3175 µm) but not 1/16 inch (because 1/16 inch does not equal an integral number of µm).

  IPP Compatibility: MediaPrintableArea is not an IPP attribute.

  See Also:
    Serialized Form

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `static int` | `INCH` Value to indicate units of inches (in).
    `static int` | `MM` Value to indicate units of millimeters (mm).

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `MediaPrintableArea(float x, float y, float w, float h, int units)` Constructs a MediaPrintableArea object from floating point values.
    `MediaPrintableArea(int x, int y, int w, int h, int units)` Constructs a MediaPrintableArea object from integer values.

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `boolean` | `equals(Object object)` Returns whether this media margins attribute is equivalent to the passed in object.
    `Class<? extends Attribute>` | `getCategory()` Get the printing attribute class which is to be used as the "category" for this printing attribute value.
    `float` | `getHeight(int units)` Get the height of the printable area in the specified units.
    `String` | `getName()` Get the name of the category of which this attribute value is an instance.
    `float[]` | `getPrintableArea(int units)` Get the printable area as an array of 4 values in the order x, y, w, h.
    `float` | `getWidth(int units)` Get the width of the printable area in the specified units.
    `float` | `getX(int units)` Get the x location of the origin of the printable area in the specified units.
    `float` | `getY(int units)` Get the y location of the origin of the printable area in the specified units.
    `int` | `hashCode()` Returns a hash code value for this attribute.
    `String` | `toString()` Returns a string version of this rectangular size attribute in mm.
    `String` | `toString(int units, String unitsName)` Returns a string version of this rectangular size attribute in the given units.

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

      `clone, finalize, getClass, notify, notifyAll, wait, wait, wait`

- - ### Field Detail

    - #### INCH

          public static final int INCH

      Value to indicate units of inches (in). It is actually the conversion factor by which to multiply inches to yield µm (25400).
      See Also:
        Constant Field Values

    - #### MM

          public static final int MM

      Value to indicate units of millimeters (mm). It is actually the conversion factor by which to multiply mm to yield µm (1000).
      See Also:
        Constant Field Values

  - ### Constructor Detail

    - #### MediaPrintableArea

          public MediaPrintableArea(float x,
                            float y,
                            float w,
                            float h,
                            int units)

      Constructs a MediaPrintableArea object from floating point values.
      Parameters:
        `x` - printable x
        `y` - printable y
        `w` - printable width
        `h` - printable height
        `units` - in which the values are expressed.
      Throws:
        `IllegalArgumentException` - Thrown if `x` < 0 or `y` < 0 or `w` <= 0 or `h` <= 0 or `units` < 1.

    - #### MediaPrintableArea

          public MediaPrintableArea(int x,
                            int y,
                            int w,
                            int h,
                            int units)

      Constructs a MediaPrintableArea object from integer values.
      Parameters:
        `x` - printable x
        `y` - printable y
        `w` - printable width
        `h` - printable height
        `units` - in which the values are expressed.
      Throws:
        `IllegalArgumentException` - Thrown if `x` < 0 or `y` < 0 or `w` <= 0 or `h` <= 0 or `units` < 1.

  - ### Method Detail

    - #### getPrintableArea

          public float[] getPrintableArea(int units)

      Get the printable area as an array of 4 values in the order x, y, w, h. The values returned are in the given units.
      Parameters:
        `units` - Unit conversion factor, e.g. ``INCH`` or ``MM``.
      Returns:
        printable area as array of x, y, w, h in the specified units.
      Throws:
        `IllegalArgumentException` - (unchecked exception) Thrown if `units` < 1.

    - #### getX

          public float getX(int units)

      Get the x location of the origin of the printable area in the specified units.
      Parameters:
        `units` - Unit conversion factor, e.g. ``INCH`` or ``MM``.
      Returns:
        x location of the origin of the printable area in the specified units.
      Throws:
        `IllegalArgumentException` - (unchecked exception) Thrown if `units` < 1.

    - #### getY

          public float getY(int units)

      Get the y location of the origin of the printable area in the specified units.
      Parameters:
        `units` - Unit conversion factor, e.g. ``INCH`` or ``MM``.
      Returns:
        y location of the origin of the printable area in the specified units.
      Throws:
        `IllegalArgumentException` - (unchecked exception) Thrown if `units` < 1.

    - #### getWidth

          public float getWidth(int units)

      Get the width of the printable area in the specified units.
      Parameters:
        `units` - Unit conversion factor, e.g. ``INCH`` or ``MM``.
      Returns:
        width of the printable area in the specified units.
      Throws:
        `IllegalArgumentException` - (unchecked exception) Thrown if `units` < 1.

    - #### getHeight

          public float getHeight(int units)

      Get the height of the printable area in the specified units.
      Parameters:
        `units` - Unit conversion factor, e.g. ``INCH`` or ``MM``.
      Returns:
        height of the printable area in the specified units.
      Throws:
        `IllegalArgumentException` - (unchecked exception) Thrown if `units` < 1.

    - #### equals

          public boolean equals(Object object)

      Returns whether this media margins attribute is equivalent to the passed in object. To be equivalent, all of the following conditions must be true:
      1. `object` is not null.
      2. `object` is an instance of class MediaPrintableArea.
      3. The origin and dimensions are the same.
      Overrides:
        `equals` in class `Object`
      Parameters:
        `object` - Object to compare to.
      Returns:
        True if `object` is equivalent to this media margins attribute, false otherwise.
      See Also:
        `Object.hashCode()`, `HashMap`

    - #### getCategory

          public final Class<? extends Attribute> getCategory()

      Get the printing attribute class which is to be used as the "category" for this printing attribute value.

      For class MediaPrintableArea, the category is class MediaPrintableArea itself.

      Specified by:
        `getCategory` in interface `Attribute`
      Returns:
        Printing attribute class (category), an instance of class `java.lang.Class`.

    - #### getName

          public final String getName()

      Get the name of the category of which this attribute value is an instance.

      For class MediaPrintableArea, the category name is `"media-printable-area"`.

      This is not an IPP V1.1 attribute.

      Specified by:
        `getName` in interface `Attribute`
      Returns:
        Attribute category name.

    - #### toString

          public String toString(int units,
                        String unitsName)

      Returns a string version of this rectangular size attribute in the given units.
      Parameters:
        `units` - Unit conversion factor, e.g. ``INCH`` or ``MM``.
        `unitsName` - Units name string, e.g. `"in"` or `"mm"`. If null, no units name is appended to the result.
      Returns:
        String version of this two-dimensional size attribute.
      Throws:
        `IllegalArgumentException` - (unchecked exception) Thrown if `units` < 1.

    - #### toString

          public String toString()

      Returns a string version of this rectangular size attribute in mm.
      Overrides:
        `toString` in class `Object`
      Returns:
        a string representation of the object.

    - #### hashCode

          public int hashCode()

      Returns a hash code value for this attribute.
      Overrides:
        `hashCode` in class `Object`
      Returns:
        a hash code value for this object.
      See Also:
        `Object.equals(java.lang.Object)`, `System.identityHashCode(java.lang.Object)`

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