org.eclipse.nebula.widgets.nattable.painter.cell

Class GradientBackgroundPainter

java.lang.Object

org.eclipse.nebula.widgets.nattable.painter.cell.AbstractCellPainter

org.eclipse.nebula.widgets.nattable.painter.cell.CellPainterWrapper

org.eclipse.nebula.widgets.nattable.painter.cell.GradientBackgroundPainter

All Implemented Interfaces:

ICellPainter

public class GradientBackgroundPainter
extends CellPainterWrapper

Paints the background of the cell with a gradient sweeping using the style configuration. To configure the gradient sweeping the following style attributes need to be configured in the ConfigRegistry:

• CellStyleAttributes.GRADIENT_FOREGROUND_COLOR or CellStyleAttributes.FOREGROUND_COLOR
• CellStyleAttributes.GRADIENT_BACKGROUND_COLOR or CellStyleAttributes.BACKGROUND_COLOR

If none of these values are registered in the ConfigRegistry the painting is skipped.

Can be used as a cell painter or a decorator.

Author:

Dirk Fauth

Constructor Summary

Constructors

Constructor and Description
GradientBackgroundPainter() Creates a GradientBackgroundPainter with a gradient sweeping from left to right.
GradientBackgroundPainter(boolean vertical) Creates a GradientBackgroundPainter where the sweeping direction can be set.
GradientBackgroundPainter(ICellPainter painter) Creates a GradientBackgroundPainter as wrapper for the given painter with a gradient sweeping from left to right.
GradientBackgroundPainter(ICellPainter painter, boolean vertical) Creates a GradientBackgroundPainter as wrapper for the given painter where the sweeping direction can be set.

Method Summary

Methods

Modifier and Type	Method and Description
protected org.eclipse.swt.graphics.Color	getBackgroundColour(ILayerCell cell, IConfigRegistry configRegistry) Searches the background color to be used for gradient sweeping.
protected org.eclipse.swt.graphics.Color	getForeGroundColour(ILayerCell cell, IConfigRegistry configRegistry) Searches the foreground color to be used for gradient sweeping.
void	paintCell(ILayerCell cell, org.eclipse.swt.graphics.GC gc, org.eclipse.swt.graphics.Rectangle bounds, IConfigRegistry configRegistry)

Methods inherited from class org.eclipse.nebula.widgets.nattable.painter.cell.CellPainterWrapper

getCellPainterAt, getPreferredHeight, getPreferredWidth, getWrappedPainter, getWrappedPainterBounds, setWrappedPainter

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

GradientBackgroundPainter

public GradientBackgroundPainter()

Creates a GradientBackgroundPainter with a gradient sweeping from left to right.

GradientBackgroundPainter

public GradientBackgroundPainter(boolean vertical)

Creates a GradientBackgroundPainter where the sweeping direction can be set.

Parameters:

vertical - if true sweeps from top to bottom, else sweeps from left to right. false is default

GradientBackgroundPainter

public GradientBackgroundPainter(ICellPainter painter)

Creates a GradientBackgroundPainter as wrapper for the given painter with a gradient sweeping from left to right.

Parameters:

painter - The ICellPainter that is wrapped by this GradientBackgroundPainter

GradientBackgroundPainter

public GradientBackgroundPainter(ICellPainter painter,
                         boolean vertical)

Creates a GradientBackgroundPainter as wrapper for the given painter where the sweeping direction can be set.

Parameters:

painter - The ICellPainter that is wrapped by this GradientBackgroundPainter

vertical - if true sweeps from top to bottom, else sweeps from left to right. false is default

Method Detail

paintCell

public void paintCell(ILayerCell cell,
             org.eclipse.swt.graphics.GC gc,
             org.eclipse.swt.graphics.Rectangle bounds,
             IConfigRegistry configRegistry)

Specified by:

paintCell in interface ICellPainter

Overrides:

paintCell in class CellPainterWrapper

getForeGroundColour

protected org.eclipse.swt.graphics.Color getForeGroundColour(ILayerCell cell,
                                                 IConfigRegistry configRegistry)

Searches the foreground color to be used for gradient sweeping. First checks the ConfigRegistry if there is a value for the attribute CellStyleAttributes.GRADIENT_FOREGROUND_COLOR is registered. If there is one this value will be returned, if not it is checked if there is a value registered for CellStyleAttributes.FOREGROUND_COLOR and returned. If there is no value registered for any of these attributes, null will be returned which will skip the painting.

Parameters:

cell - The LayerCell for which the style attributes should be retrieved out of the ConfigRegistry

configRegistry - The ConfigRegistry to retrieve the attribute values from.

Returns:

The Color to use as foreground color of the gradient sweeping or null if none was configured.

getBackgroundColour

protected org.eclipse.swt.graphics.Color getBackgroundColour(ILayerCell cell,
                                                 IConfigRegistry configRegistry)

Searches the background color to be used for gradient sweeping. First checks the ConfigRegistry if there is a value for the attribute CellStyleAttributes.GRADIENT_BACKGROUND_COLOR is registered. If there is one this value will be returned, if not it is checked if there is a value registered for CellStyleAttributes.BACKGROUND_COLOR and returned. If there is no value registered for any of these attributes, null will be returned which will skip the painting.

Parameters:

cell - The LayerCell for which the style attributes should be retrieved out of the ConfigRegistry

configRegistry - The ConfigRegistry to retrieve the attribute values from.

Returns:

The Color to use as background color of the gradient sweeping or null if none was configured.