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Class gjt.DoubleBufferedContainer 

java.lang.Object
   |
   +----java.awt.Component
           |
           +----java.awt.Container
                   |
                   +----gjt.DoubleBufferedContainer
public class DoubleBufferedContainer
extends Container
A double-buffered container that can be used for animation (see Playfield) or for dragging and dropping lightweight components. A DoubleBufferedContainer has 2 offscreen buffers: one for the background (alone), and a workplace buffer for drawing into offscreen. DoubleBufferedContainer provides a number of methods for controlling blitting between background, workplace and the screen itself. For instance, blitBackgroundToWorkplace() blits the entire background to the workpace buffer, but not to the screen. Later on, one could invoke blitWorkPlaceToScreen(Rectangle), and the workplace would be blitted to the screen, clipped by the specified rectangle.

See Also:
Playfield, DoubleBufferedContainerTest

Variable Index

o buffers

Constructor Index

o DoubleBufferedContainer()
o DoubleBufferedContainer(Image)

Method Index

o blitBackgroundToWorkplace()
o blitBackgroundToWorkplace(Rectangle)
o blitWorkplaceToScreen()
o blitWorkplaceToScreen(Rectangle)
o eraseComponent(Component)
o eraseComponent(Component, boolean)
o moveComponent(Component, Point)
o paint(Graphics)
o paintBackground()
o paintBackground(Graphics)
o paintBackground(Rectangle)
o paintComponent(Component)
o paintComponent(Component, boolean)
o paintComponents(Rectangle, boolean)
o paintOverlappingComponents(Component)
o setWallpaperImage(Image)
o update(Graphics)
o windowDamaged(Graphics)

Variables

o buffers 
 protected DoubleBufferedContainer. OffscreenBuffer buffers

Constructors

o DoubleBufferedContainer 
 public DoubleBufferedContainer()
o DoubleBufferedContainer 
 public DoubleBufferedContainer(Image wallpaperImage)

Methods

o setWallpaperImage 
 public void setWallpaperImage(Image image)
o update 
 public void update(Graphics g)
Overrides:
update in class Component
o paint 
 public void paint(Graphics g)
Overrides:
paint in class Container
o blitWorkplaceToScreen 
 public void blitWorkplaceToScreen()
o blitBackgroundToWorkplace 
 public void blitBackgroundToWorkplace()
o blitWorkplaceToScreen 
 public void blitWorkplaceToScreen(Rectangle clip)
o blitBackgroundToWorkplace 
 public void blitBackgroundToWorkplace(Rectangle clip)
o paintComponents 
 public void paintComponents(Rectangle clip,
                             boolean update)
o paintComponent 
 public void paintComponent(Component comp)
o eraseComponent 
 public void eraseComponent(Component comp)
o paintComponent 
 public void paintComponent(Component comp,
                            boolean update)
o eraseComponent 
 public void eraseComponent(Component comp,
                            boolean update)
o moveComponent 
 public void moveComponent(Component comp,
                           Point newLoc)
o windowDamaged 
 protected boolean windowDamaged(Graphics g)
o paintOverlappingComponents 
 protected void paintOverlappingComponents(Component comp)
o paintBackground 
 protected void paintBackground()
o paintBackground 
 protected void paintBackground(Rectangle clip)
o paintBackground 
 protected void paintBackground(Graphics g)

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