ej.fp.widget

Interface Display.DisplayExtension

Enclosing class:

Display

public static interface Display.DisplayExtension

This interface is a subset of LLUIDisplayImpl interface (provided by MicroUI graphical engine and required to use a MicroUI Display in a MicroEJ application).

It provides a set of minimal methods to customize the Display widget (which implements LLUIDisplayImpl) without needing to subclass it (no need to create a sub-widget "display" with same characteritics and same Widget.WidgetAttribute, just to override one setting).

An implementation classname of this interface can be set thanks the widget attribute Display.setExtensionClass(String).

Method Summary

Modifier and Type	Method and Description
int	convertARGBColorToDisplayColor(Display display, int argbColor) Converts the 32-bit ARGB color format (A-R-G-B) into the display color format.
int	convertDisplayColorToARGBColor(Display display, int displayColor) Converts the display color format into a 32-bit ARGB color format (A-R-G-B).
int	getNumberOfColors(Display display) Gets the number of colors that can be represented on the device.
boolean	isColor(Display display) Asks if the display is a colored display or not.
default boolean	prepareBlendingOfIndexedColors(Display display, java.util.concurrent.atomic.AtomicInteger foreground, java.util.concurrent.atomic.AtomicInteger background) Prepares the blending of two ARGB colors (only useful when the LCD is a palletized LCD).

Method Detail

isColor

boolean isColor(Display display)

Asks if the display is a colored display or not.

Parameters:

display - the display widget.

Returns:

true when the display is not a grayscale display, false otherwise.

See Also:

LLUIDisplayImpl.isColor()

getNumberOfColors

int getNumberOfColors(Display display)

Gets the number of colors that can be represented on the device.

Parameters:

display - the display widget.

Returns:

the number of colors of the display.

See Also:

LLUIDisplayImpl.getNumberOfColors()

convertARGBColorToDisplayColor

int convertARGBColorToDisplayColor(Display display,
                                   int argbColor)

Converts the 32-bit ARGB color format (A-R-G-B) into the display color format.

Parameters:

display - the display widget.

argbColor - the color to convert.

Returns:

the display color equivalent to microUIColor.

See Also:

LLUIDisplayImpl.convertARGBColorToDisplayColor(int)

convertDisplayColorToARGBColor

int convertDisplayColorToARGBColor(Display display,
                                   int displayColor)

Converts the display color format into a 32-bit ARGB color format (A-R-G-B).

Parameters:

display - the display widget.

displayColor - the color to convert.

Returns:

the MicroUI color equivalent to displayColor.

See Also:

LLUIDisplayImpl.convertDisplayColorToARGBColor(int)

prepareBlendingOfIndexedColors

default boolean prepareBlendingOfIndexedColors(Display display,
                                               java.util.concurrent.atomic.AtomicInteger foreground,
                                               java.util.concurrent.atomic.AtomicInteger background)

Prepares the blending of two ARGB colors (only useful when the LCD is a palletized LCD).

By default this feature is not used.

Parameters:

display - the display widget.

foreground - the foreground ARGB color to convert.

background - the background ARGB color to convert.

Returns:

true when the indexes have been found, false otherwise.

See Also:

LLUIDisplayImpl.prepareBlendingOfIndexedColors(AtomicInteger, AtomicInteger)