ej.mwt.style.background

Class ImageBackground

java.lang.Object

ej.mwt.style.background.ImageBackground

All Implemented Interfaces:

Background

public class ImageBackground
extends java.lang.Object
implements Background

Draws an image on the background.

Constructor Summary

Constructors

Constructor and Description
ImageBackground(ej.microui.display.Image image) Creates an image background aligned on the top-left corner.
ImageBackground(ej.microui.display.Image image, int horizontalAlignment, int verticalAlignment) Creates an image background specifying its alignment.

Method Summary

Modifier and Type	Method and Description
void	apply(ej.microui.display.GraphicsContext g, int width, int height) Applies the background on a graphics context.
boolean	equals(java.lang.Object obj)
int	hashCode()
boolean	isTransparent(int width, int height) Tells whether or not this background is transparent.

Methods inherited from class java.lang.Object

clone, getClass, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ImageBackground

public ImageBackground(ej.microui.display.Image image)

Creates an image background aligned on the top-left corner.

Parameters:

image - the background image.

ImageBackground

public ImageBackground(ej.microui.display.Image image,
                       int horizontalAlignment,
                       int verticalAlignment)

Creates an image background specifying its alignment.

Parameters:

image - the background image.

horizontalAlignment - the horizontal alignment.

verticalAlignment - the vertical alignment.

Throws:

java.lang.IllegalArgumentException - if the horizontal or vertical alignment is not valid.

See Also:

Alignment.validateHorizontalAlignment(int), Alignment.validateVerticalAlignment(int)

Method Detail

isTransparent

public boolean isTransparent(int width,
                             int height)

Description copied from interface: Background

Tells whether or not this background is transparent.

A background is considered as transparent if it does not draw every pixel with maximal opacity when it is applied. If a widget has a transparent background, its parent has to be rendered before the widget.

Specified by:

isTransparent in interface Background

Parameters:

width - the width of the background.

height - the height of the background.

Returns:

true if the background is transparent, false otherwise.

apply

public void apply(ej.microui.display.GraphicsContext g,
                  int width,
                  int height)

Description copied from interface: Background

Applies the background on a graphics context.

Specified by:

apply in interface Background

Parameters:

g - the graphics context.

width - the width of the background.

height - the height of the background.

equals

public boolean equals(@Nullable
                      java.lang.Object obj)

Specified by:

equals in interface Background

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Specified by:

hashCode in interface Background

Overrides:

hashCode in class java.lang.Object