Package com.luciad.format.raster

Class TLcdMultilevelRasterPainter

java.lang.Object
com.luciad.view.gxy.ALcdGXYPainter
com.luciad.format.raster.ALcdRasterPainter
com.luciad.format.raster.TLcdMultilevelRasterPainter
All Implemented Interfaces:
ILcdRasterPainter, ILcdCloneable, ILcdPropertyChangeSource, ILcdGXYPainter, ILcdGXYPainterProvider, Serializable, Cloneable
public class TLcdMultilevelRasterPainter extends ALcdRasterPainter implements ILcdRasterPainter, ILcdGXYPainterProvider
Important notice: the package com.luciad.imaging presents a new API for the modeling of raster data. For new projects, it is recommended to use this API instead of ILcdRaster et al. For visualization in a GXY view, see TLcdGXYImagePainter

This ILcdGXYPainter can paint ILcdMultilevelRaster instances. It can warp them between different coordinate systems, if required, or just paint their linearly scaled images, if possible.

The painter picks the raster level to be painted, based on the pixel density of the rasters and on the resolution of the view. It essentially picks the first level for which raster pixels are not projected across multiple view pixels is selected. This approach avoids pixelation effects. The levelSwitchFactor property allows to adjust this behavior.

The startResolutionFactor and stopResolutionFactor properties additionally allow to put limits on the number of raster pixels per screen pixel.

See Also:

  • Constructor Details

    • TLcdMultilevelRasterPainter

      public TLcdMultilevelRasterPainter()
      Creates a new TLcdMultilevelRasterPainter, with a default name.

    • TLcdMultilevelRasterPainter

      public TLcdMultilevelRasterPainter(String aDisplayName)
      Creates a new TLcdMultilevelRasterPainter.
      Parameters:
      aDisplayName - the displayName of the painter.

  • Method Details

    • setStartResolutionFactor

      public void setStartResolutionFactor(double aFactor)
      Description copied from interface: ILcdRasterPainter
      Sets the highest pixel density (number of raster pixels per screen pixel) at which a raster is painted. If the pixel density is too high, only the raster outlines and tile outlines are painted (or a lower resolution level is chosen). This can avoid having to load a large raster to fill a relatively small view.
      Specified by:
      setStartResolutionFactor in interface ILcdRasterPainter
      Overrides:
      setStartResolutionFactor in class ALcdRasterPainter

    • setStopResolutionFactor

      public void setStopResolutionFactor(double aFactor)
      Description copied from interface: ILcdRasterPainter
      Sets the lowest pixel density (number of raster pixels per screen pixel) at which a raster is painted. If the pixel density is too low, nothing is painted. This can avoid painting overly pixelated rasters.
      Specified by:
      setStopResolutionFactor in interface ILcdRasterPainter
      Overrides:
      setStopResolutionFactor in class ALcdRasterPainter

    • setStartScale

      public void setStartScale(double aStartScale)
      Description copied from class: ALcdRasterPainter
      As an alternative for the start resolution factor and stop resolution factor, this method and ALcdRasterPainter.getStopScale() can be used for more intuitive control on when to paint a raster and when to paint the outline. When the internal scale of the view (ILcdGXYView.getScale() is smaller than the start scale, the outline will be painted in stead of the raster. The default value is 0. Warning: when the view scale is in between the start and stop scale, the start resolution factor and the stop resolution factor are still used as a second check. If you don't want interference from these two settings, set the start resolution factor to Double.POSITIVE_INFINITY and the stop resolution factor to 0.
      Overrides:
      setStartScale in class ALcdRasterPainter
      Parameters:
      aStartScale - The view scale at which one starts painting the raster rather that the outline (when zooming in).
      See Also:

    • setStopScale

      public void setStopScale(double aStopScale)
      Description copied from class: ALcdRasterPainter
      As an alternative for the start resolution factor and stop resolution factor, this method and ALcdRasterPainter.getStartScale() can be used for more intuitive control on when to paint a raster. When the internal scale of the view (ILcdGXYView.getScale() is larger than the stop scale, the raster won't be painted. The default value is Double.POSITIVE_INFINITY.
      Overrides:
      setStopScale in class ALcdRasterPainter
      Parameters:
      aStopScale - The view scale at which one stops painting the raster (when zooming in).
      See Also:

    • setForcePainting

      public void setForcePainting(boolean aForcePainting)
      Description copied from interface: ILcdRasterPainter
      Specifies whether the visible portion of the raster should always be painted, irrespective of the startResolutionFactor and stopResolutionFactor.
      Specified by:
      setForcePainting in interface ILcdRasterPainter
      Overrides:
      setForcePainting in class ALcdRasterPainter
      See Also:

    • setPaintOutline

      public void setPaintOutline(boolean aPaintOutline)
      Description copied from interface: ILcdRasterPainter
      Specifies whether the raster outlines and tile outlines should be painted when the pixel density (number of raster pixels per screen pixel) of the raster to be painted is higher than the startResolutionFactor.
      Specified by:
      setPaintOutline in interface ILcdRasterPainter
      Overrides:
      setPaintOutline in class ALcdRasterPainter
      See Also:

    • setOutlineStyle

      public void setOutlineStyle(ILcdGXYPainterStyle aOutlineStyle)
      Description copied from class: ALcdRasterPainter
      Sets the style that is used when drawing the outline of the area of raster and/or tiles. If set to a non-null value the configure style will take precedence over the configured outline color if the style modifies the Graphics current color.
      Overrides:
      setOutlineStyle in class ALcdRasterPainter
      Parameters:
      aOutlineStyle - the outline style to use
      See Also:

    • setOutlineColor

      public void setOutlineColor(Color aColor)
      Description copied from interface: ILcdRasterPainter
      Sets the line color used to paint the raster outlines and tile outlines when the pixel density (number of raster pixels per screen pixel) of the raster to be painted is higher than the startResolutionFactor.
      Specified by:
      setOutlineColor in interface ILcdRasterPainter
      Overrides:
      setOutlineColor in class ALcdRasterPainter
      See Also:

    • setFillOutlineArea

      public void setFillOutlineArea(boolean aFillOutlineArea)
      Description copied from class: ALcdRasterPainter
      Specifies whether the raster outlines and tile outlines should be filled when the pixel density (number of raster pixels per screen pixel) of the raster to be painted is higher than the startResolutionFactor.
      Overrides:
      setFillOutlineArea in class ALcdRasterPainter
      See Also:

    • setOutlineAreaFillStyle

      public void setOutlineAreaFillStyle(ILcdGXYPainterStyle aFillStyle)
      Description copied from class: ALcdRasterPainter
      Sets the style that is used when filling the outline area of raster and/or tiles. If the fill style is set to null and fill outline area is enabled the result visual result on screen is undefined.
      Overrides:
      setOutlineAreaFillStyle in class ALcdRasterPainter
      Parameters:
      aFillStyle - the fill style to use
      See Also:

    • setMaxNumberOfOutlineTiles

      public void setMaxNumberOfOutlineTiles(int aMaxNumberOfOutlineTiles)
      Description copied from interface: ILcdRasterPainter
      Sets the maximum number of outlines of individual tiles to paint when the pixel density (number of raster pixels per screen pixel) of the raster to be painted is higher than the startResolutionFactor. If the number of tiles is larger than this maximum, only the global outline of the raster is painted.
      Specified by:
      setMaxNumberOfOutlineTiles in interface ILcdRasterPainter
      Overrides:
      setMaxNumberOfOutlineTiles in class ALcdRasterPainter
      See Also:

    • setMaxNoOfOutlineTiles

      public void setMaxNoOfOutlineTiles(int aMaxNumberOfOutlineTiles)
      Specified by:
      setMaxNoOfOutlineTiles in interface ILcdRasterPainter
      Overrides:
      setMaxNoOfOutlineTiles in class ALcdRasterPainter

    • setColorModel

      public void setColorModel(ColorModel aColorModel)
      Description copied from interface: ILcdRasterPainter
      Sets the ColorModel that determines how a raster pixel is transformed into color components for a screen pixel. If it is not set, the raster itself determines the ColorModel. If that is not set either, the contained raster tiles determine the ColorModel.
      Specified by:
      setColorModel in interface ILcdRasterPainter
      Overrides:
      setColorModel in class ALcdRasterPainter

    • setRGBImageFilter

      public void setRGBImageFilter(RGBImageFilter aRGBImageFilter)
      Description copied from class: ALcdRasterPainter
      Sets the optional filter that is applied to painted rasters. The filter should be spatially invariant. Any brightness and transparency settings are applied on top of it.
      Overrides:
      setRGBImageFilter in class ALcdRasterPainter

    • setTransparency

      public void setTransparency(float aTransparency)
      Description copied from interface: ILcdRasterPainter
      Sets the transparency factor that is applied to painted rasters. It is an alpha value between 0 and 1, with 0 being perfectly transparent, and 1 (the default) being perfectly opaque.
      Specified by:
      setTransparency in interface ILcdRasterPainter
      Overrides:
      setTransparency in class ALcdRasterPainter

    • setBrightness

      public void setBrightness(float aBrightness)
      Description copied from interface: ILcdRasterPainter
      Sets the brightness that is applied to painted rasters. It is a value in [0, 2]. A value of 1 (the default) leaves the brightness unchanged. Values larger than 1 makes the colors brighter, while a value smaller than 1 makes the colors less bright.
      Specified by:
      setBrightness in interface ILcdRasterPainter
      Overrides:
      setBrightness in class ALcdRasterPainter
      See Also:

    • setContrast

      public void setContrast(float aContrast)
      Description copied from class: ALcdRasterPainter
      Sets the contrast that is applied to painted rasters. It is a value in [0, 2]. A value of 1 (the default) leaves the contrast unchanged. A value larger than 1 enhances the contrast of dark colors by making them brighter, while a value smaller than 1 enhances the contrast of bright colors by making them darker.
      Overrides:
      setContrast in class ALcdRasterPainter

    • setUseSubTileImageCaching

      public void setUseSubTileImageCaching(boolean aCaching)
      Specifies whether this painter should cache images that have been created from raster subtiles. Setting this property to true helps to avoid disk access during painting (due to lazy loading of raster tiles). It may also speed up the painting of rasters with non-standard color models, like 16 bit indexed color images. The default is false.

      This property is only relevant for rasters that don't have to be warped, that is, when the model reference of the raster is the same as the world reference of the view.

    • isUseSubTileImageCaching

      public boolean isUseSubTileImageCaching()
      Returns whether this painter caches images that have been created from raster subtiles.
      See Also:

    • setUseDeferredSubTileDecoding

      public void setUseDeferredSubTileDecoding(boolean aDefer)
      Specifies whether this painter should not wait for tiles to be fully decoded before painting them. Setting this property to true means that parts of the view may remain blank, but the display will update sooner. A proper complete display update will be triggered when there are no more tiles waiting to be decoded. The default is false.

      This property is only relevant if isUseSubTileImageCaching() is true.

      Note that this functionality is not needed for layers wrapped by ILcdGXYAsynchronousLayerWrapper. For best results, use the latter mechanism instead and set this property to false.

    • isUseDeferredSubTileDecoding

      public boolean isUseDeferredSubTileDecoding()
      Returns whether this painter does not wait for tiles to be fully decoded before painting them.
      See Also:

    • setPaintCache

      public void setPaintCache(boolean aCache)
      Specifies whether this painter should cache the warped raster images it has painted. A warped raster image has the same size as the view for which it was created. Caching it may improve performance if it can be reused, and it can generally avoid repeated allocation of large image objects on the heap. The default is true.

      This property is only relevant for rasters that have to be warped, that is, when the model reference of the raster is different from the world reference of the view.

      See Also:

    • getPaintCache

      public boolean getPaintCache()
      Returns whether this painter caches the warped raster images it has painted.
      See Also:

    • setAvoidOpaqueBorder

      public void setAvoidOpaqueBorder(boolean aAvoidOpaqueBorder)
      Specifies whether the painter should avoid drawing opaque borders around transformed rasters.

      The painter normally uses the default pixel of a raster when painting the border around a transformed raster. If the default pixel is transparent, the border is invisible. Otherwise, the border is opaque. This typically occurs if a raster has an IndexColorModel without a transparent color index.

      Setting this property activates some additional processing to avoid the opaque border anyway. The processing overhead can run up to 50% when painting described rasters. Leaving the property unset is therefore preferable, for instance when the area around painted rasters is not relevant for the application. The default is false.

    • isAvoidOpaqueBorder

      public boolean isAvoidOpaqueBorder()
      See Also:

    • setReuseInternalBuffer

      public void setReuseInternalBuffer(boolean aReuseInternalBuffer)
      Specifies whether this painter should cache a single warped raster image with this raster painter, or whether it should cache a warped raster image with each raster that is painted. Caching a single image with this painter and reusing it is generally more memory-efficient. Caching images with the painted rasters can improve performance, but it may also waste a a lot of memory. The default is false.

      This property is only relevant if setPaintCache(boolean) is true.

    • isReuseInternalBuffer

      public boolean isReuseInternalBuffer()
      Returns whether this painter caches a single warped raster image with this raster painter.
      See Also:

    • setBorder

      public void setBorder(int aBorder)
      Sets an additional border around all sides of the view, defining a region in which a painted raster is transformed and cached. A full repaint will be slower, but subsequent panning over the cached region will then be faster. For instance, a border of 200 pixels around a view of 800 by 600 pixels defines a cache region of 1200 by 1000 pixels. The default border is 0 pixels.

      This property is only relevant for rasters that have to be warped, that is, when the model reference of the raster is different from the world reference of the view.

      Parameters:
      aBorder - the border, expressed in pixels.

    • getBorder

      public int getBorder()
      Returns the additional border around all sides of the view.
      See Also:

    • setOversamplingRate

      public void setOversamplingRate(int aOverSamplingRate)
      Sets the number of samples used per pixel when transforming a raster. The default is 1. The total number of samples used per pixel equals (aOverSamplingRate * aOverSamplingRate). For instance, if the oversampling rate is set to 2, the painter will take 4 samples per pixel and average their values. This increases the image quality, especially if the raster contains sharp edges, but it also increases the computational cost.

      This property is only relevant for rasters that have to be warped, that is, when the model reference of the raster is different from the world reference of the view.

      Parameters:
      aOverSamplingRate - the number of samples used per pixel in one direction.

    • getOversamplingRate

      public int getOversamplingRate()
      Returns the sampling rate used when transforming the raster. This is the number of samples used per pixel in one direction.
      See Also:

    • setWarpBlockSize

      public void setWarpBlockSize(int aWarpBlockSize)
      Sets the width and height of the block in which the raster transformation is approximated using bilinear interpolation. Smaller values result in more accurate results, but also larger computation times. The default is 64. With a value of 1, every pixel is transformed without approximation.

      This property is only relevant for rasters that have to be warped, that is, when the model reference of the raster is different from the world reference of the view.

      Parameters:
      aWarpBlockSize - the width and height, expressed in pixels.

    • getWarpBlockSize

      public int getWarpBlockSize()
      Returns the width and height of the block in which the raster transformation is approximated using bilinear interpolation.
      See Also:

    • setLevelSwitchFactor

      public void setLevelSwitchFactor(double aLevelSwitchFactor)
      Sets the factor that affects the scale point at which a raster level is selected. The default value is 1.0: as soon as a single raster pixel would project to several screen pixels, a higher resolution level is used. This way, the highest practical raster quality is chosen. A value smaller than 1.0 delays this switching: a single raster pixel may project to multiple screen pixels. Such a value may cause pixelating effects, but it can reduce the burden of loading, decoding, and caching rasters.

      An alternative way to specify the scales of the levels to be painted is setLevelSwitchScales.

    • getLevelSwitchFactor

      public double getLevelSwitchFactor()
      Returns the factor that affects the scale point at which a raster level is selected.
      See Also:

    • setLevelSwitchScales

      public void setLevelSwitchScales(double[] aLevelSwitchScales)
      Sets the scales at which the painter will switch between raster levels. The number of values must be equal to the number of raster levels minus 1. They should be specified in ascending order, corresponding to raster levels with increasing resolutions.

      If the scales are not set, the raster pixel density is used to automatically determine the level of the raster to be painted (also see setLevelSwitchFactor).

    • getLevelSwitchScales

      public double[] getLevelSwitchScales()
      Returns the scales at which the painter will switch between raster levels.
      See Also:

    • setObject

      public void setObject(Object aObject)
      Description copied from interface: ILcdGXYPainter
      Sets the Object for which the representation shall be handled by this painter.

      Setting the object on the painter may have an effect on the internal state of the painter, for example, the color to use.

      When the object is set to a painter, the context parameter in subsequent calls to methods in this class must contain a layer that contains this object and for which the painter for this object is this painter.

      Specified by:
      setObject in interface ILcdGXYPainter
      Parameters:
      aObject - the object for which the representation shall be handled by this painter.
      See Also:

    • getObject

      public Object getObject()
      Description copied from interface: ILcdGXYPainter
      Returns the Object for which the representation is currently being handled by this painter.
      Specified by:
      getObject in interface ILcdGXYPainter
      Returns:
      the Object for which the representation is currently being handled by this painter.
      See Also:

    • paint

      public void paint(Graphics aGraphics, int aMode, ILcdGXYContext aGXYContext)
      Description copied from interface: ILcdGXYPainter
      Displays the representation of the object in the given mode on the Graphics passed, taking into account the supplied context.

      The visual representation of an object depends on the context. Depending on the context (e.g. is the location covered by the view), an object may or may not have a representation. The context contains:

      • transformations which allow to compute the location in view space of points and bounds given in model, space
      • a pen which can connect points with a line or create arcs around a point,
      • the view for which the object's representation must be painted. This can be useful when the painted object depends on the scale of the view, or the presence of other layers in the view.
      • the current location(s) of the mouse or input device and the last location(s) the mouse or input device was pressed.

      The mode passed in this method indicates what part of the object must be painted, whether it should be painted as selected or not, and whether user interaction (via mouse movements) must be taken into account.

      When the mode passed contains either TRANSLATING, RESHAPING or CREATING, this method is also responsible for interpreting interaction on the representation of an object and modifying the representation of the object accordingly. The painter is not responsible for modifying the object itself, this is done by a corresponding ILcdGXYEditor . Implementations of ILcdGXYPainter and ILcdGXYEditor interfaces must be consistent for an object: the painter must display the result of the user interaction on the object, while the editor is responsible for modifying the object as a result of the user interaction. A good practice to ensure a consistent implementation is to implement both the ILcdGXYPainter and ILcdGXYEditor interfaces in a single class.

      When the mode passed includes SNAPS, the part of the representation which corresponds to the object returned as snap target by the method snapTarget must be painted in order to provide the user with a visual indication of the snap target.

      The Graphics passed in this method can be different from the Graphics returned by a view due to techniques such as double buffering (as applied in Swing). Basic drawing operations must always be performed on the Graphics passed as an argument in this method.

      Specified by:
      paint in interface ILcdGXYPainter
      Overrides:
      paint in class ALcdRasterPainter
      Parameters:
      aGraphics - the Graphics on which the representation of the object is painted
      aMode - the mode the object is represented in (see class documentation).
      aGXYContext - the ILcdGXYContext the drawing depends on.

    • isTouched

      public boolean isTouched(Graphics aGraphics, int aState, ILcdGXYContext aGXYContext)
      Description copied from interface: ILcdGXYPainter
      Checks if the representation of the object in the given mode is touched at the location as defined in the supplied context.

      The location that must be taken into account to check whether the representation is touched can be retrieved from the context passed with the methods ILcdGXYContext.getX() and ILcdGXYContext.getY(). If the check is part of an ongoing operation of user interaction, for example, when the mouse is being dragged, the location of the start of the operation can also be taken into account using the methods ILcdGXYContext.getDeltaX() and ILcdGXYContext.getDeltaY(). The context contains the transformations required to convert this location into the equivalent location in model space. Implementations of this interface usually follow either of the following patterns:

      • transform the location of the interaction back to model space and compare the coordinates with the object in model space.
      • transform the location to world space and compare with a world representation of the object. This forces the painter into caching a world representation of the object. Caching a view representation of an object is not very practical as it would have to change whenever the view's scale changes or when it is panned. A world representation of an object only changes when the view's XYWorldReference changes, which happens less frequently.

      As the mode influences the way an object is represented, it must also be taken into account when checking whether that representation is being touched. When the mode contains CREATING, RESHAPING or TRANSLATING which indicate that the object must be represented in a state for an ongoing operation, the location of the start of the operation may be taken into account as mentioned above. The painting result can take into account multiple locations, to respond to, for example, multi-touch input. When the mode contains SELECTED, the painter should also check if the non-selected representation is touched, since these are always painted on top of each other.

      The boundsSFCT is often used to speed up the performance of this method as a location outside these bounds can never touch the representation of the object.

      Note that this method does not give an indication of what part of the object is touched. It is up to the painter implementations to provide methods to make this distinction. The method does also not indicate what sensitivity must be applied when checking if an object is touched. It is up to the implementation to decide what should be the maximum distance between the location given in the context and the closest relevant point or area of the representation of the object.

      Specified by:
      isTouched in interface ILcdGXYPainter
      Overrides:
      isTouched in class ALcdRasterPainter
      Parameters:
      aGraphics - the Graphics on which the representation of the object is painted
      aState - the mode the object is represented in
      aGXYContext - contains the location of the interaction and the transformations to convert this location into model coordinates
      Returns:
      true if the representation of the object in the given mode is touched by the location as defined in the context passed, false otherwise
      See Also:

    • boundsSFCT

      public void boundsSFCT(Graphics aGraphics, int aMode, ILcdGXYContext aGXYContext, ILcd2DEditableBounds aBoundsSFCT) throws TLcdNoBoundsException
      Description copied from interface: ILcdGXYPainter
      Sets the supplied bounds (in view coordinates, pixels) so that it encompasses the representation of the object in the given mode taking into account the given context.

      If this method returns without exception the bounds argument must encompass the representation of the object. A point outside the bounds will not be contained within the painted object.

      The bounds returned in this method can be seen as the equivalent in the view space of the bounds in the model space for ILcdBounded objects.

      Specified by:
      boundsSFCT in interface ILcdGXYPainter
      Parameters:
      aGraphics - the Graphics on which the representation of the object is painted
      aMode - the mode the object is represented in (see class documentation). For example, an object may be represented differently in SELECTED mode compared to DEFAULT mode. The returned bounds of the representation must take this different representation into account.
      aGXYContext - the context for which the representation of the object is painted. It contains amongst others the transformations from model to world and world to view.
      aBoundsSFCT - the bounds that must be adapted to encompass the representation of the object in the given mode and context. These bounds must not be taken into account when the method has thrown an exception.
      Throws:
      TLcdNoBoundsException - if no bounds can be determined for the representation of the object. This can happen when the object does not have a representation in the given context, for example when it is located in a part of the world which is not visible in the current view.
      See Also:

    • suitableRasterLevel

      public int suitableRasterLevel(ILcdMultilevelRaster aMultiLevelRaster, ILcdGXYContext aGXYContext)
      Computes the raster level in the given multi-level raster that is most suitable for processing or analysis, in the given context. The level is based on the pixel densities of the rasters compared to the scale of the view, taking into account the necessary transformations between the raster's model coordinates and the view coordinates.
      Parameters:
      aMultiLevelRaster - the multi-level raster from which a raster is to be selected for processing or analysis.
      aGXYContext - the context that contains the model of the raster, the model-to-world transformation, and the view-to-world transformation.
      Returns:
      the suitable raster level.
      See Also:

    • suitableRasterLevel

      public int suitableRasterLevel(ILcdMultilevelRaster aMultilevelRaster, ILcdGXYContext aGXYContext, Graphics aGraphics)
      Computes the raster level in the given multi-level raster that is most suitable for display, in the given context. The level is based on the pixel densities of the rasters compared to the scale of the view and the Graphics, taking into account the necessary transformations between the raster's model coordinates and the view coordinates.
      Parameters:
      aMultilevelRaster - the multi-level raster from which a raster is to be selected for display.
      aGXYContext - the context that contains the model of the raster, the model-to-world transformation, and the view-to-world transformation.
      aGraphics - the Graphics instance on which the raster is to be painted.
      Returns:
      the suitable raster level.
      See Also:

    • getGXYPainter

      public ILcdGXYPainter getGXYPainter(Object aObject)
      Description copied from interface: ILcdGXYPainterProvider
      Finds an ILcdGXYPainter that can be used to paint or locate the object passed.

      The painter provider is responsible for setting the object to the painter before returning the painter. An implementation should therefore have the following structure: 

      
 public ILcdGXYPainter getGXYPainter(Object aObject) {
   ILcdGXYPainter painter = ... // find the painter for the object
   if (painter != null) {
    painter.setObject(aObject);
   }
   return painter;
 }

      Specified by:
      getGXYPainter in interface ILcdGXYPainterProvider
      Overrides:
      getGXYPainter in class ALcdGXYPainter
      Parameters:
      aObject - the object to find a painter for
      Returns:
      a painter that can be used to paint or locate the object; or null if no painter could be found for the given object, or the object could not be set on the retrieved painter.

    • clone

      public Object clone()
      Description copied from interface: ILcdCloneable

      Makes Object.clone() public.

      When for example extending from java.lang.Object, it can be implemented like this: 
      
 public Object clone() {
   try {
     return super.clone();
   } catch ( CloneNotSupportedException e ) {
     // Cannot happen: extends from Object and implements Cloneable (see also Object.clone)
     throw new RuntimeException( e );
   }
 }
      Specified by:
      clone in interface ILcdCloneable
      Specified by:
      clone in interface ILcdGXYPainterProvider
      Overrides:
      clone in class ALcdRasterPainter
      Returns:
      a clone of this painter provider.
      See Also: