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## com.jgoodies.forms.util
Class AbstractUnitConverter

    java.lang.Object
      com.jgoodies.forms.util.AbstractUnitConverter

All Implemented Interfaces:
  UnitConverter

Direct Known Subclasses:
  DefaultUnitConverter

    public abstract class AbstractUnitConverter

extends Object
implements UnitConverter

An abstract implementation of the `UnitConverter` interface that minimizes the effort required to convert font-dependent sizes to pixels.

Version:
  $Revision: 1.2 $
Author:
  Karsten Lentzsch
See Also:
  `DefaultUnitConverter`, `Size`, `Sizes`

Constructor Summary
`AbstractUnitConverter()`

Method Summary
`int` | `centimeterAsPixel(double cm, Component component)` Converts Centimeters and returns pixels using the resolution of the given component's graphics object.
`protected int` | `centimeterAsPixel(double cm, int dpi)` Converts Centimeters and returns pixels using the specified resolution.
`protected double` | `computeAverageCharWidth(FontMetrics metrics, String testString)` Computes and returns the average character width of the specified test string using the given FontMetrics.
`int` | `dialogUnitXAsPixel(int dluX, Component c)` Converts horizontal dialog units and returns pixels.
`protected int` | `dialogUnitXAsPixel(int dluX, double dialogBaseUnitsX)` Converts horizontal dialog units and returns pixels.
`int` | `dialogUnitYAsPixel(int dluY, Component c)` Converts vertical dialog units and returns pixels.
`protected int` | `dialogUnitYAsPixel(int dluY, double dialogBaseUnitsY)` Converts vertical dialog units and returns pixels.
`protected int` | `getDefaultScreenResolution()` Computes and returns the default resolution.
`protected abstract double` | `getDialogBaseUnitsX(Component component)` Gets and returns the horizontal dialog base units.
`protected abstract double` | `getDialogBaseUnitsY(Component component)` Gets and returns the vertical dialog base units.
`protected int` | `getScreenResolution(Component c)` Returns the components screen resolution or the default screen resolution if the component is null or has no toolkit assigned yet.
`int` | `inchAsPixel(double in, Component component)` Converts Inches and returns pixels using the specified resolution.
`protected int` | `inchAsPixel(double in, int dpi)` Converts Inches and returns pixels using the specified resolution.
`int` | `millimeterAsPixel(double mm, Component component)` Converts Millimeters and returns pixels using the resolution of the given component's graphics object.
`protected int` | `millimeterAsPixel(double mm, int dpi)` Converts Millimeters and returns pixels using the specified resolution.
`int` | `pointAsPixel(int pt, Component component)` Converts DTP Points and returns pixels using the resolution of the given component's graphics object.
`protected int` | `pointAsPixel(int pt, int dpi)` Converts DTP Points and returns pixels using the specified resolution.

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

Constructor Detail

### AbstractUnitConverter

    public AbstractUnitConverter()

Method Detail

### inchAsPixel

    public int inchAsPixel(double in,
                           Component component)

  Converts Inches and returns pixels using the specified resolution.

  Specified by:
    `inchAsPixel` in interface `UnitConverter`
  Parameters:
    `in` - the Inches
    `component` - the component that provides the graphics object
  Returns:
    the given Inches as pixels

### millimeterAsPixel

    public int millimeterAsPixel(double mm,
                                 Component component)

  Converts Millimeters and returns pixels using the resolution of the given component's graphics object.

  Specified by:
    `millimeterAsPixel` in interface `UnitConverter`
  Parameters:
    `mm` - Millimeters
    `component` - the component that provides the graphics object
  Returns:
    the given Millimeters as pixels

### centimeterAsPixel

    public int centimeterAsPixel(double cm,
                                 Component component)

  Converts Centimeters and returns pixels using the resolution of the given component's graphics object.

  Specified by:
    `centimeterAsPixel` in interface `UnitConverter`
  Parameters:
    `cm` - Centimeters
    `component` - the component that provides the graphics object
  Returns:
    the given Centimeters as pixels

### pointAsPixel

    public int pointAsPixel(int pt,
                            Component component)

  Converts DTP Points and returns pixels using the resolution of the given component's graphics object.

  Specified by:
    `pointAsPixel` in interface `UnitConverter`
  Parameters:
    `pt` - DTP Points
    `component` - the component that provides the graphics object
  Returns:
    the given Points as pixels

### dialogUnitXAsPixel

    public int dialogUnitXAsPixel(int dluX,
                                  Component c)

  Converts horizontal dialog units and returns pixels. Honors the resolution, dialog font size, platform, and l&f.

  Specified by:
    `dialogUnitXAsPixel` in interface `UnitConverter`
  Parameters:
    `dluX` - the horizontal dialog units
    `c` - a Component that provides the font and graphics
  Returns:
    the given horizontal dialog units as pixels

### dialogUnitYAsPixel

    public int dialogUnitYAsPixel(int dluY,
                                  Component c)

  Converts vertical dialog units and returns pixels. Honors the resolution, dialog font size, platform, and l&f.

  Specified by:
    `dialogUnitYAsPixel` in interface `UnitConverter`
  Parameters:
    `dluY` - the vertical dialog units
    `c` - a Component that provides the font and graphics
  Returns:
    the given vertical dialog units as pixels

### getDialogBaseUnitsX

    protected abstract double getDialogBaseUnitsX(Component component)

  Gets and returns the horizontal dialog base units. Implementations are encouraged to cache previously computed dialog base units.

  Parameters:
    `component` - a Component that provides the font and graphics
  Returns:
    the horizontal dialog base units

### getDialogBaseUnitsY

    protected abstract double getDialogBaseUnitsY(Component component)

  Gets and returns the vertical dialog base units. Implementations are encouraged to cache previously computed dialog base units.

  Parameters:
    `component` - a Component that provides the font and graphics
  Returns:
    the vertical dialog base units

### inchAsPixel

    protected final int inchAsPixel(double in,
                                    int dpi)

  Converts Inches and returns pixels using the specified resolution.

  Parameters:
    `in` - the Inches
    `dpi` - the resolution
  Returns:
    the given Inches as pixels

### millimeterAsPixel

    protected final int millimeterAsPixel(double mm,
                                          int dpi)

  Converts Millimeters and returns pixels using the specified resolution.

  Parameters:
    `mm` - Millimeters
    `dpi` - the resolution
  Returns:
    the given Millimeters as pixels

### centimeterAsPixel

    protected final int centimeterAsPixel(double cm,
                                          int dpi)

  Converts Centimeters and returns pixels using the specified resolution.

  Parameters:
    `cm` - Centimeters
    `dpi` - the resolution
  Returns:
    the given Centimeters as pixels

### pointAsPixel

    protected final int pointAsPixel(int pt,
                                     int dpi)

  Converts DTP Points and returns pixels using the specified resolution.

  Parameters:
    `pt` - DTP Points
    `dpi` - the resolution in dpi
  Returns:
    the given Points as pixels

### dialogUnitXAsPixel

    protected int dialogUnitXAsPixel(int dluX,
                                     double dialogBaseUnitsX)

  Converts horizontal dialog units and returns pixels.

  Parameters:
    `dluX` - the horizontal dialog units
    `dialogBaseUnitsX` - the horizontal dialog base units
  Returns:
    the given dialog base units as pixels

### dialogUnitYAsPixel

    protected int dialogUnitYAsPixel(int dluY,
                                     double dialogBaseUnitsY)

  Converts vertical dialog units and returns pixels.

  Parameters:
    `dluY` - the vertical dialog units
    `dialogBaseUnitsY` - the vertical dialog base units
  Returns:
    the given dialog base units as pixels

### computeAverageCharWidth

    protected double computeAverageCharWidth(FontMetrics metrics,
                                             String testString)

  Computes and returns the average character width of the specified test string using the given FontMetrics. The test string shall represent an "average" text.

  Parameters:
    `metrics` - used to compute the test string's width
    `testString` - the string that shall represent an "average" text
  Returns:
    the test string's average character width.

### getScreenResolution

    protected int getScreenResolution(Component c)

  Returns the components screen resolution or the default screen resolution if the component is null or has no toolkit assigned yet.

  Parameters:
    `c` - the component to ask for a toolkit
  Returns:
    the component's screen resolution

### getDefaultScreenResolution

    protected int getDefaultScreenResolution()

  Computes and returns the default resolution.

  Returns:
    the default screen resolution

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Copyright © 2002-2007 JGoodies Karsten Lentzsch. All Rights Reserved.