ej.fp.widget.display.brs

Class PredrawRefreshStrategy

java.lang.Object

ej.fp.widget.display.brs.PredrawRefreshStrategy

All Implemented Interfaces:

BufferRefreshStrategy

public class PredrawRefreshStrategy
extends java.lang.Object
implements BufferRefreshStrategy

The "predraw" strategy consists in restoring the back buffer with the content of the previous drawings (the past) just before the very first drawing after a flush (and not just after the flush). A partial restore is only performed if the first drawing uses a different back buffer to the previous drawings (before the flush) and which not fits the full display region. Otherwise, the restore is useless (the drawings will reuse the same back buffer or the first drawing will fully erase the past).

Constructor Summary

Constructors

Constructor and Description
PredrawRefreshStrategy()

Method Summary

Modifier and Type	Method and Description
void	newDrawingRegion(DisplayBufferManager bufferManager, ej.microui.display.Rectangle rectangle, boolean drawingNow) Notifies that a region will be modified by the application in the display back buffer.
void	refresh(DisplayBufferManager bufferManager) Refreshes the display by calling DisplayBufferManager#flush(ej.fp.widget.display.Rectangle[]).
void	setBufferCount(int bufferCount) Sets the number of buffers.
void	setDisplaySize(int width, int height) Sets the display size.

Methods inherited from class java.lang.Object

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

Constructor Detail

PredrawRefreshStrategy

public PredrawRefreshStrategy()

Method Detail

setDisplaySize

public void setDisplaySize(int width,
                           int height)

Description copied from interface: BufferRefreshStrategy

Sets the display size.

Specified by:

setDisplaySize in interface BufferRefreshStrategy

Parameters:

width - the width of the display.

height - the height of the display.

setBufferCount

public void setBufferCount(int bufferCount)

Description copied from interface: BufferRefreshStrategy

Sets the number of buffers.

Specified by:

setBufferCount in interface BufferRefreshStrategy

Parameters:

bufferCount - the number of buffers.

newDrawingRegion

public void newDrawingRegion(DisplayBufferManager bufferManager,
                             ej.microui.display.Rectangle rectangle,
                             boolean drawingNow)

Description copied from interface: BufferRefreshStrategy

Notifies that a region will be modified by the application in the display back buffer.

The implementation can perform some drawings.

Called when a drawing is done or when the user declares a dirty region.

Specified by:

newDrawingRegion in interface BufferRefreshStrategy

Parameters:

bufferManager - the display buffer manager.

rectangle - the drawing region.

drawingNow - true if a drawing is following this call, false otherwise.

See Also:

LLUIDisplayImpl.newDrawingRegion(int, int, int, int, boolean)

refresh

public void refresh(DisplayBufferManager bufferManager)

Description copied from interface: BufferRefreshStrategy

Refreshes the display by calling DisplayBufferManager#flush(ej.fp.widget.display.Rectangle[]).

Specified by:

refresh in interface BufferRefreshStrategy

Parameters:

bufferManager - the display buffer manager.