org.zaval.lw
Class LwPaintManImpl

java.lang.Object
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  +--org.zaval.lw.LwPaintManager
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        +--org.zaval.lw.LwPaintManImpl

All Implemented Interfaces:

LwManager

Direct Known Subclasses:

J2SEPaintManImpl

public class LwPaintManImpl

extends LwPaintManager

This class is implementation of the LwPaintManager for the library. The implementation supports:

• Double buffering.
• Light weight component views painting.

Field Summary
protected  java.awt.Image	buffer
protected  boolean	isBuffered
protected  java.awt.Dimension	MAX_BUFFER_SIZE

 

Fields inherited from class org.zaval.lw.LwPaintManager

LOCKER

 

Constructor Summary

LwPaintManImpl()           Constructs the paint manager.

LwPaintManImpl(boolean isBuffered)           Constructs the paint manager with the specified options.

 

Method Summary
void	dispose()           Disposes the manager.
protected  void	paintComponent(java.awt.Graphics g, LwComponent c, LwComponent parent)           The method is called to paint the specified component.
protected  void	paintDesktop(java.awt.Graphics g, LwDesktop d)           The method initiates painting process for the specified root light weight component using the graphics.
protected  void	paintOnTop(java.awt.Graphics g, LwContainer c)           The method is called whenever the specified container and its child components has been rendered.
protected  void	updateComponent(java.awt.Graphics g, LwComponent c, LwComponent p)           The method is called to update the specified component.
void	useDoubleBuffer(boolean b)           Enables or disables double buffering.

 

Methods inherited from class org.zaval.lw.LwPaintManager

paint, repaint, repaint, startPaint

 

Methods inherited from class java.lang.Object

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

 

Field Detail

MAX_BUFFER_SIZE

protected java.awt.Dimension MAX_BUFFER_SIZE

buffer

protected java.awt.Image buffer

isBuffered

protected boolean isBuffered

LwPaintManImpl

public LwPaintManImpl()

Constructs the paint manager.

LwPaintManImpl

public LwPaintManImpl(boolean isBuffered)

Constructs the paint manager with the specified options.

Parameters:

isBuffered - the flag indicates if the double buffering should be applied.

useDoubleBuffer

public void useDoubleBuffer(boolean b)

Enables or disables double buffering. The double buffering is used to increase painting performance but it needs memory.

Parameters:

b - true to enable double buffering; false otherwise.

dispose

public void dispose()

Description copied from interface: LwManager

Disposes the manager. The method is supposed to be used for disposing different manager related structures to free system resources. The method is invoked by LwVCL core when the manager ends its "live".

Overrides:

dispose in class LwPaintManager

paintDesktop

protected void paintDesktop(java.awt.Graphics g,
                            LwDesktop d)

The method initiates painting process for the specified root light weight component using the graphics. The method has to be used with a light weight root component implementation to start painting process. The method is overridden to support double buffering.

Overrides:

paintDesktop in class LwPaintManager

Parameters:

g - the specified graphics.

d - the specified root lightweight component.

updateComponent

protected void updateComponent(java.awt.Graphics g,
                               LwComponent c,
                               LwComponent p)

The method is called to update the specified component. The updating process can be occurred with the following two ways:

• If the component has a view manager and the manager defines a background view, than the view will be used to fill the component background.
• If the component has not any view manager or the manager doesn't define a background view, than the method fills the component with its background color.

After that the method calls update method of the component.

Overrides:

updateComponent in class LwPaintManager

Parameters:

g - the specified graphics.

c - the specified lightweight component to be updated.

p - the specified parent component that has been rendered before.

paintComponent

protected void paintComponent(java.awt.Graphics g,
                              LwComponent c,
                              LwComponent parent)

The method is called to paint the specified component. The method uses the border and face views that can be provided with a view manager of the specified component to paint the component.

Overrides:

paintComponent in class LwPaintManager

Parameters:

g - the specified graphics.

c - the specified lightweight component to be painted.

parent - the specified parent component that has been rendered before.

paintOnTop

protected void paintOnTop(java.awt.Graphics g,
                          LwContainer c)

Description copied from class: LwPaintManager

The method is called whenever the specified container and its child components has been rendered. Probably the method will be redesigned.

Overrides:

paintOnTop in class LwPaintManager

Following copied from class: org.zaval.lw.LwPaintManager

Parameters:

g - the specified graphics.

c - the specified lightweight container.