ScalarMap

Documentation of 'visad.ScalarMap' Java class ScalarMap

Skip navigation links

All Classes

Summary:
Nested |
Field |
Constr |
Method

Detail:
Field |
Constr |
Method

java.lang.Object
- visad.ScalarMap

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, java.lang.Comparable

Direct Known Subclasses:

ConstantMap
```
public class ScalarMap
extends java.lang.Object
implements java.lang.Cloneable, java.io.Serializable, java.lang.Comparable
```
A ScalarMap object defines a mapping from a RealType to a DisplayRealType. A set of ScalarMap objects define how data are dislayed.
The mapping of values is linear. Any non-linear mapping must be handled by Display CoordinateSystem-s.

See Also:

Serialized Form

Constructor Summary

Constructors
Constructor and Description

ScalarMap(ScalarType scalar, DisplayRealType display_scalar)
Construct a ScalarMap that maps the scalar to the display_scalar.

Constructors
Constructor and Description
`ScalarMap(ScalarType scalar, DisplayRealType display_scalar)` Construct a `ScalarMap` that maps the scalar to the display_scalar.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`addScalarMapListener(ScalarMapListener listener)` add a ScalarMapListener, to be notified whenever setRange is invoked
`boolean`	`badRange()`
`boolean`	`checkTicks(DataRenderer r, DataDisplayLink link)` return true if application called setRange
`java.lang.Object`	`clone()` Create and return a copy of this ScalarMap.
`int`	`compareTo(java.lang.Object o)` Compares this ScalarMap with another object.
`void`	`disableAutoScale()` disable auto-scaling for this ScalarMap
`boolean`	`doInitialize()`
`static void`	`equalizeFlow(java.util.Vector mapVector, DisplayTupleType flow_tuple)` ensure that non-Manual components of flow_tuple have equal dataRanges symmetric about 0.0
`boolean`	`equals(java.lang.Object o)` Indicates if this ScalarMap is the same as another object.
`AxisScale`	`getAxisScale()` Get the AxisScale associated with this ScalarMap.
`Control`	`getControl()` Gets the Control for the DisplayScalar.
`DisplayImpl`	`getDisplay()` Get the DisplayImpl this ScalarMap is linked to
`DisplayRealType`	`getDisplayScalar()` Get the DisplayRealType that is the map range
`Unit`	`getOverrideUnit()` Return the override unit.
`double[]`	`getRange()` Returns the current range of the `RealType` data.
`ScalarType`	`getScalar()` Get the ScalarType that is the map domain
`java.lang.String`	`getScalarName()` Get the name being used on the axis scale.
`boolean`	`getScale(double[] so, double[] data, double[] display)` return value is true if data (RealType) values are linearly scaled to display (DisplayRealType) values; if so, then values are scaled by: display_value = data_value * so[0] + so[1]; (data[0], data[1]) defines range of data values (either passed in to setRange or computed by autoscaling logic) and (display[0], display[1]) defines range of display values; so, data, display must each be passed in as double[2] arrays; note if overrideUnit != null, so and data are in overrideUnit
`boolean`	`getScaleEnable()` See if the AxisScale is visible or not.
`int`	`getValueIndex()` get index of DisplayScalar in value array used by ShadowType.doTransform
`int`	`hashCode()` Returns the hash code for this ScalarMap.
`long`	`incTick()` invoke incTick on every application call to setRange
`float[]`	`inverseScaleValues(float[] values)` return an array of data (RealType) values by inverse linear scaling (if applicable) the display_values array (DisplayRealType values); this is useful for direct manipulation and cursor labels
`float[]`	`inverseScaleValues(float[] values, boolean newArray)` return an array of data (RealType) values by inverse linear scaling (if applicable) the display_values array (DisplayRealType values); this is useful for direct manipulation and cursor labels
`boolean`	`isAutoScale()` determine whether this ScalarMap is auto-scaled
`void`	`makeScale()` Create the scale that is displayed.
`boolean`	`peekTicks(DataRenderer r, DataDisplayLink link)`
`void`	`removeScalarMapListener(ScalarMapListener listener)` remove a ScalarMapListener
`void`	`resetAutoScale()` re-enable auto-scaling for this ScalarMap
`byte[]`	`scaleValues(byte[] values, int factor)` return an array of display (DisplayRealType) values by linear scaling (if applicable) the data_values array (RealType values); results are scaled by the given scale factor
`float[]`	`scaleValues(double[] values)` return an array of display (DisplayRealType) values by linear scaling (if applicable) the data_values array (RealType values)
`float[]`	`scaleValues(float[] values)` return an array of display (DisplayRealType) values by linear scaling (if applicable) the data_values array (RealType values)
`float[]`	`scaleValues(float[] values, boolean newArray)` return an array of display (DisplayRealType) values by linear scaling (if applicable) the data_values array (RealType values)
`void`	`setOverrideUnit(Unit unit)` Set display Unit to override default Unit of Scalar; MUST be called before any data are displayed
`void`	`setRange(DataShadow shadow)` set range used for linear map from Scalar to DisplayScalar values; this is the call for automatic scaling
`void`	`setRange(double low, double hi)` Explicitly sets the range of `RealType` data values that is mapped to the natural range of `DisplayRealType` display values.
`void`	`setRange(double low, double hi, int remoteId)` explicitly set the range of data (RealType) values; used for linear map from Scalar to DisplayScalar values; if neither this nor setRangeByUnits is invoked, then the range will be computed from the initial values of Data objects linked to the Display by autoscaling logic; if the range of data values is (0.0, 1.0), for example, this method may be invoked with low = 1.0 and hi = 0.0 to invert the display scale .
`void`	`setRangeByUnits()` explicitly set the range of data (RealType) values according to Unit conversion between this ScalarMap's RealType and DisplayRealType (both must have Units and they must be convertable; if neither this nor setRange is invoked, then the range will be computed from the initial values of Data objects linked to the Display by autoscaling logic.
`void`	`setScalarName(java.lang.String name)` Set the name being used on the axis scale.
`void`	`setScaleColor(float[] color)` Set color of axis scales; color must be float[3] with red, green and blue components; DisplayScalar must be XAxis, YAxis or ZAxis.
`void`	`setScaleEnable(boolean on)` Enable the display of the scale for this map.
`void`	`setTicks()` set tickFlag according to OldTick and NewTick
`void`	`setUnderscoreToBlank(boolean u2b)` Change underscore characters (_) in the Scalar name to blanks.
`void`	`setValueIndex(int index)` set index of DisplayScalar in value array used by ShadowType.doTransform
`java.lang.String`	`toString()` Returns a string representation of the ScalarMap.
`java.lang.String`	`toString(java.lang.String pre)` Returns a string representation of the ScalarMap with the specified prefix prepended.

Methods inherited from class java.lang.Object
getClass, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - ScalarMap
```
public ScalarMap(ScalarType scalar,
                 DisplayRealType display_scalar)
          throws VisADException
```
    Construct a ScalarMap that maps the scalar to the display_scalar.
    
    Parameters:
    
    scalar - ScalarType (must be RealType at present)
    
    display_scalar - DisplayScalar to map to. If the display_scalar is one of the spatial axes (X, Y, Z) an AxisScale will be created.
    
    Throws:
    
    VisADException - VisAD error
- Method Detail
  - resetAutoScale
```
public void resetAutoScale()
```
    re-enable auto-scaling for this ScalarMap
  - disableAutoScale
```
public void disableAutoScale()
```
    disable auto-scaling for this ScalarMap
  - isAutoScale
```
public boolean isAutoScale()
```
    determine whether this ScalarMap is auto-scaled
  - doInitialize
```
public boolean doInitialize()
```
  - setOverrideUnit
```
public void setOverrideUnit(Unit unit)
                     throws VisADException
```
    Set display Unit to override default Unit of Scalar; MUST be called before any data are displayed
    
    Parameters:
    
    unit - unit that data will be displayed with
    
    Throws:
    
    VisADException - unit is not convertable with the default unit or scalar is not a RealType.
  - getOverrideUnit
```
public Unit getOverrideUnit()
```
    Return the override unit.
    
    Returns:
    
    Unit being used in the display.
  - getScalarName
```
public java.lang.String getScalarName()
```
    Get the name being used on the axis scale.
    
    Returns:
    
    name of the scale - either the default or the one set by setScalarName
    
    See Also:
    
    setScalarName(String name)
  - setScalarName
```
public void setScalarName(java.lang.String name)
```
    Set the name being used on the axis scale.
    
    Parameters:
    
    name - new name for the scalar.
    
    See Also:
    
    AxisScale.setTitle(String name)
  - incTick
```
public long incTick()
```
    invoke incTick on every application call to setRange
  - setTicks
```
public void setTicks()
```
    set tickFlag according to OldTick and NewTick
  - peekTicks
```
public boolean peekTicks(DataRenderer r,
                         DataDisplayLink link)
```
  - checkTicks
```
public boolean checkTicks(DataRenderer r,
                          DataDisplayLink link)
```
    return true if application called setRange
  - getScalar
```
public ScalarType getScalar()
```
    Get the ScalarType that is the map domain
    
    Returns:
    
    ScalarType of map domain
  - getDisplayScalar
```
public DisplayRealType getDisplayScalar()
```
    Get the DisplayRealType that is the map range
    
    Returns:
    
    DisplayRealType of map range
  - getDisplay
```
public DisplayImpl getDisplay()
```
    Get the DisplayImpl this ScalarMap is linked to
    
    Returns:
    
    display that this ScalarMap is linked to
  - getControl
```
public Control getControl()
```
    Gets the Control for the DisplayScalar. The Control is constructed when this ScalarMap is linked to a Display via an invocation of the Display.addMap(ScalarMap) method. Not all ScalarMaps have Controls, generally depending on the ScalarMap's DisplayRealType. If a ScalarMap is removed from a Display (via the Display.clearMaps() method, then, in general, any information in the ScalarMap's control will be lost and must be reestablished.
    
    Returns:
    
    The Control for the DisplayScalar or null if one has not yet been set.
  - getScale
```
public boolean getScale(double[] so,
                        double[] data,
                        double[] display)
```
    return value is true if data (RealType) values are linearly scaled to display (DisplayRealType) values; if so, then values are scaled by: display_value = data_value * so[0] + so[1]; (data[0], data[1]) defines range of data values (either passed in to setRange or computed by autoscaling logic) and (display[0], display[1]) defines range of display values; so, data, display must each be passed in as double[2] arrays; note if overrideUnit != null, so and data are in overrideUnit
    
    Parameters:
    
    so - array to contain scale and offset
    
    data - array to contain the data range
    
    display - array to contain the display range
    
    Returns:
    
    true if data are linearly scaled
  - getRange
```
public double[] getRange()
```
    Returns the current range of the RealType data. The range is implicitly set by autoscaling logic or may be explicitly set by the setRange(double,double) method. Note that if overrideUnit != null, then dataRange is in overrideUnit.
    
    Returns:
    
    The current range of the RealType data. The array is new and may be safely modified.
  - setRangeByUnits
```
public void setRangeByUnits()
                     throws VisADException,
                            java.rmi.RemoteException
```
    explicitly set the range of data (RealType) values according to Unit conversion between this ScalarMap's RealType and DisplayRealType (both must have Units and they must be convertable; if neither this nor setRange is invoked, then the range will be computed from the initial values of Data objects linked to the Display by autoscaling logic.
    
    Throws:
    
    VisADException - VisAD error
    
    java.rmi.RemoteException - Java RMI error
  - setRange
```
public void setRange(double low,
                     double hi)
              throws VisADException,
                     java.rmi.RemoteException
```
    Explicitly sets the range of RealType data values that is mapped to the natural range of DisplayRealType display values. This method is used to define a linear map from Scalar to DisplayScalar values. If neither this nor setRangeByUnits() is invoked, then the range will be computed by autoscaling logic from the initial values of Data objects linked to the Display. If the range of data values is (0.0, 1.0), for example, this method may be invoked with low = 1.0 and hi = 0.0 to invert the display scale.
    
    Parameters:
    
    low - One end of the range of applicable data.
    
    hi - The other end of the range of applicable data.
    
    Throws:
    
    VisADException - VisAD failure.
    
    java.rmi.RemoteException - Java RMI failure.
  - setRange
```
public void setRange(double low,
                     double hi,
                     int remoteId)
              throws VisADException,
                     java.rmi.RemoteException
```
    explicitly set the range of data (RealType) values; used for linear map from Scalar to DisplayScalar values; if neither this nor setRangeByUnits is invoked, then the range will be computed from the initial values of Data objects linked to the Display by autoscaling logic; if the range of data values is (0.0, 1.0), for example, this method may be invoked with low = 1.0 and hi = 0.0 to invert the display scale .
    
    Parameters:
    
    low - lower range value (see notes above)
    
    hi - upper range value (see notes above)
    
    remoteId - id of remote scale
    
    Throws:
    
    VisADException - VisAD error
    
    java.rmi.RemoteException - Java RMI error
  - setRange
```
public void setRange(DataShadow shadow)
              throws VisADException,
                     java.rmi.RemoteException
```
    set range used for linear map from Scalar to DisplayScalar values; this is the call for automatic scaling
    
    Throws:
    
    VisADException
    
    java.rmi.RemoteException
  - addScalarMapListener
```
public void addScalarMapListener(ScalarMapListener listener)
```
    add a ScalarMapListener, to be notified whenever setRange is invoked
    
    Parameters:
    
    listener - ScalarMapListener to recieve notification of changes.
  - removeScalarMapListener
```
public void removeScalarMapListener(ScalarMapListener listener)
```
    remove a ScalarMapListener
    
    Parameters:
    
    listener - ScalarMapListener to remove from the list
  - setUnderscoreToBlank
```
public void setUnderscoreToBlank(boolean u2b)
```
    Change underscore characters (_) in the Scalar name to blanks. Can be used to change the displayed scalar name on the axis.
    
    Parameters:
    
    u2b - true to change, false to change back
    
    See Also:
    
    as an alternative
  - makeScale
```
public void makeScale()
               throws VisADException
```
    Create the scale that is displayed. This is called automatically when setRange(lo, hi) and setDisplay are called. It makes a call to AxisScale.makeScale() where the actual hard work is done.
    
    Throws:
    
    VisADException - VisAD error.
  - setScaleEnable
```
public void setScaleEnable(boolean on)
```
    Enable the display of the scale for this map. This can be used to selectively turn on or off the scales in a display. Must be used in conjunction with GraphicsModeControl.setScaleEnable() or DisplayRenderer.setScaleOn(boolean on).
    
    Parameters:
    
    on - true will enable display of axis, false will disable display
    
    See Also:
    
    GraphicsModeControl.setScaleEnable(boolean enable), DisplayRenderer.setScaleOn(boolean on), AxisScale.setVisible(boolean visible)
  - getScaleEnable
```
public boolean getScaleEnable()
```
    See if the AxisScale is visible or not.
    
    Returns:
    
    true if the AxisScale is visible
  - setScaleColor
```
public void setScaleColor(float[] color)
                   throws VisADException
```
    Set color of axis scales; color must be float[3] with red, green and blue components; DisplayScalar must be XAxis, YAxis or ZAxis. Preferred method is to use AxisScale.setColor methods.
    Parameters: color - array of R,G,B values of color. Throws: VisADException - non-spatial DisplayScalar or wrong length of color array See Also: getAxisScale(), AxisScale.setColor(Color color), AxisScale.setColor(float[] color)
  badRange public boolean badRange() scaleValues public float[] scaleValues(double[] values) return an array of display (DisplayRealType) values by linear scaling (if applicable) the data_values array (RealType values) Parameters: values - to scale as doubles Returns: array of display values scaleValues public float[] scaleValues(float[] values) return an array of display (DisplayRealType) values by linear scaling (if applicable) the data_values array (RealType values) Parameters: values - to scale as floats Returns: array of display values scaleValues public float[] scaleValues(float[] values, boolean newArray) return an array of display (DisplayRealType) values by linear scaling (if applicable) the data_values array (RealType values) Parameters: values - to scale as floats newArray - false to scale in place Returns: array of display values scaleValues public byte[] scaleValues(byte[] values, int factor) throws VisADException return an array of display (DisplayRealType) values by linear scaling (if applicable) the data_values array (RealType values); results are scaled by the given scale factor Parameters: values - to scale as bytes Returns: array of display values Throws: VisADException inverseScaleValues public float[] inverseScaleValues(float[] values) return an array of data (RealType) values by inverse linear scaling (if applicable) the display_values array (DisplayRealType values); this is useful for direct manipulation and cursor labels Parameters: values - display values Returns: data values inverseScaleValues public float[] inverseScaleValues(float[] values, boolean newArray) return an array of data (RealType) values by inverse linear scaling (if applicable) the display_values array (DisplayRealType values); this is useful for direct manipulation and cursor labels Parameters: values - display values newArray - false to transform in place Returns: data values equalizeFlow public static void equalizeFlow(java.util.Vector mapVector, DisplayTupleType flow_tuple) throws VisADException, java.rmi.RemoteException ensure that non-Manual components of flow_tuple have equal dataRanges symmetric about 0.0 Throws: VisADException java.rmi.RemoteException setValueIndex public void setValueIndex(int index) set index of DisplayScalar in value array used by ShadowType.doTransform getValueIndex public int getValueIndex() get index of DisplayScalar in value array used by ShadowType.doTransform compareTo public int compareTo(java.lang.Object o) Compares this ScalarMap with another object. Specified by: compareTo in interface java.lang.Comparable Parameters: o - The other object. Returns: A value that is negative, zero, or positive depending on whether this instance is less than, equal to, or greater than the other object, respectively. Throws: java.lang.ClassCastException - if the other object isn't a ScalarMap. java.lang.NullPointerException - if the other object is null. equals public boolean equals(java.lang.Object o) Indicates if this ScalarMap is the same as another object. Overrides: equals in class java.lang.Object Parameters: o - The other object. Returns: true if and only if the other object is a ScalarMap and compares equal to this ScalarMap. hashCode public int hashCode() Returns the hash code for this ScalarMap. If scalarMap1.equals( scalarMap2) is true, then scalarMap1.hashCode() == scalarMap2.hashCode(). Overrides: hashCode in class java.lang.Object Returns: The hash code for this ScalarMap. clone public java.lang.Object clone() Create and return a copy of this ScalarMap. Overrides: clone in class java.lang.Object Returns: copy of the ScalarMap or null if a copy couldn't be created. toString public java.lang.String toString() Returns a string representation of the ScalarMap. Overrides: toString in class java.lang.Object Returns: a string that "textually represents" this ScalarMap. toString public java.lang.String toString(java.lang.String pre) Returns a string representation of the ScalarMap with the specified prefix prepended. Parameters: pre - prefix to prepend to the representation Returns: a string that "textually represents" this ScalarMap with pre prepended. getAxisScale public AxisScale getAxisScale() Get the AxisScale associated with this ScalarMap. Returns: the AxisScale or null if not a spatial ScalarMap







Skip navigation links




Overview
Package
Class





Prev Class
Next Class


Frames
No Frames


All Classes






Summary: 
Nested | 
Field | 
Constr | 
Method


Detail: 
Field | 
Constr | 
Method






DMelt 3.0 © DataMelt by jWork.ORG

Class ScalarMap

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

ScalarMap

Method Detail

resetAutoScale

disableAutoScale

isAutoScale

doInitialize

setOverrideUnit

getOverrideUnit

getScalarName

setScalarName

incTick

setTicks

peekTicks

checkTicks

getScalar

getDisplayScalar

getDisplay

getControl

getScale

getRange

setRangeByUnits

setRange

setRange

setRange

addScalarMapListener

removeScalarMapListener

setUnderscoreToBlank

makeScale

setScaleEnable

getScaleEnable

setScaleColor

badRange

scaleValues

scaleValues

scaleValues

scaleValues

inverseScaleValues

inverseScaleValues

equalizeFlow

setValueIndex

getValueIndex

compareTo

equals

hashCode

clone

toString

toString

getAxisScale