Package Summary Overview Summary

### class:RepaintManager [NONE]
-     public class RepaintManager
      extends Object
This class manages repaint requests, allowing the number of repaints to be minimized, for example by collapsing multiple requests into a single repaint for members of a component tree. As of 1.6 `RepaintManager` handles repaint requests for Swing's top level components (`JApplet`, `JWindow`, `JFrame` and `JDialog`). Any calls to `repaint` on one of these will call into the appropriate `addDirtyRegion` method. Since: 1.2

### constructor:RepaintManager() [NONE]
- #### RepaintManager
      public RepaintManager()
Create a new RepaintManager instance. You rarely call this constructor. directly. To get the default RepaintManager, use RepaintManager.currentManager(JComponent) (normally "this").

### method:currentManager(java.awt.Component) [NONE]
- #### currentManager
      public static RepaintManager currentManager(Component c)
Return the RepaintManager for the calling thread given a Component. Parameters: `c` - a Component -- unused in the default implementation, but could be used by an overridden version to return a different RepaintManager depending on the Component Returns: the RepaintManager object

### method:currentManager(javax.swing.JComponent) [NONE]
- #### currentManager
      public static RepaintManager currentManager(JComponent c)
Return the RepaintManager for the calling thread given a JComponent. Note: This method exists for backward binary compatibility with earlier versions of the Swing library. It simply returns the result returned by `currentManager(Component)`. Parameters: `c` - a JComponent -- unused Returns: the RepaintManager object

### method:setCurrentManager(javax.swing.RepaintManager) [NONE]
- #### setCurrentManager
      public static void setCurrentManager(RepaintManager aRepaintManager)
Set the RepaintManager that should be used for the calling thread. aRepaintManager will become the current RepaintManager for the calling thread's thread group. Parameters: `aRepaintManager` - the RepaintManager object to use

### method:addInvalidComponent(javax.swing.JComponent) [NONE]
- #### addInvalidComponent
      public void addInvalidComponent(JComponent invalidComponent)
Mark the component as in need of layout and queue a runnable for the event dispatching thread that will validate the components first isValidateRoot() ancestor. Parameters: `invalidComponent` - a component See Also: `JComponent.isValidateRoot()`, `removeInvalidComponent(javax.swing.JComponent)`

### method:removeInvalidComponent(javax.swing.JComponent) [NONE]
- #### removeInvalidComponent
      public void removeInvalidComponent(JComponent component)
Remove a component from the list of invalid components. Parameters: `component` - a component See Also: `addInvalidComponent(javax.swing.JComponent)`

### method:addDirtyRegion(javax.swing.JComponent, int, int, int, int) [NONE]
- #### addDirtyRegion
      public void addDirtyRegion(JComponent c,
                                 int x,
                                 int y,
                                 int w,
                                 int h)
Add a component in the list of components that should be refreshed. If c already has a dirty region, the rectangle (x,y,w,h) will be unioned with the region that should be redrawn. Parameters: `c` - Component to repaint, null results in nothing happening. `x` - X coordinate of the region to repaint `y` - Y coordinate of the region to repaint `w` - Width of the region to repaint `h` - Height of the region to repaint See Also: `JComponent.repaint(long, int, int, int, int)`

### method:addDirtyRegion(java.awt.Window, int, int, int, int) [NONE]
- #### addDirtyRegion
      public void addDirtyRegion(Window window,
                                 int x,
                                 int y,
                                 int w,
                                 int h)
Adds `window` to the list of `Component`s that need to be repainted. Parameters: `window` - Window to repaint, null results in nothing happening. `x` - X coordinate of the region to repaint `y` - Y coordinate of the region to repaint `w` - Width of the region to repaint `h` - Height of the region to repaint Since: 1.6 See Also: `JFrame.repaint(long, int, int, int, int)` , `JWindow.repaint(long, int, int, int, int)` , `JDialog.repaint(long, int, int, int, int)`

### method:addDirtyRegion(java.applet.Applet, int, int, int, int) [NONE]
- #### addDirtyRegion
      public void addDirtyRegion(Applet applet,
                                 int x,
                                 int y,
                                 int w,
                                 int h)
Adds `applet` to the list of `Component`s that need to be repainted. Parameters: `applet` - Applet to repaint, null results in nothing happening. `x` - X coordinate of the region to repaint `y` - Y coordinate of the region to repaint `w` - Width of the region to repaint `h` - Height of the region to repaint Since: 1.6 See Also: `JApplet.repaint(long, int, int, int, int)`

### method:getDirtyRegion(javax.swing.JComponent) [NONE]
- #### getDirtyRegion
      public Rectangle getDirtyRegion(JComponent aComponent)
Return the current dirty region for a component. Return an empty rectangle if the component is not dirty. Parameters: `aComponent` - a component Returns: the region

### method:markCompletelyDirty(javax.swing.JComponent) [NONE]
- #### markCompletelyDirty
      public void markCompletelyDirty(JComponent aComponent)
Mark a component completely dirty. aComponent will be completely painted during the next paintDirtyRegions() call. Parameters: `aComponent` - a component

### method:markCompletelyClean(javax.swing.JComponent) [NONE]
- #### markCompletelyClean
      public void markCompletelyClean(JComponent aComponent)
Mark a component completely clean. aComponent will not get painted during the next paintDirtyRegions() call. Parameters: `aComponent` - a component

### method:isCompletelyDirty(javax.swing.JComponent) [NONE]
- #### isCompletelyDirty
      public boolean isCompletelyDirty(JComponent aComponent)
Convenience method that returns true if aComponent will be completely painted during the next paintDirtyRegions(). If computing dirty regions is expensive for your component, use this method and avoid computing dirty region if it return true. Parameters: `aComponent` - a component Returns: `true` if aComponent will be completely painted during the next paintDirtyRegions().

### method:validateInvalidComponents() [NONE]
- #### validateInvalidComponents
      public void validateInvalidComponents()
Validate all of the components that have been marked invalid. See Also: `addInvalidComponent(javax.swing.JComponent)`

### method:paintDirtyRegions() [NONE]
- #### paintDirtyRegions
      public void paintDirtyRegions()
Paint all of the components that have been marked dirty. See Also: `addDirtyRegion(javax.swing.JComponent, int, int, int, int)`

### method:toString() [NONE]
- #### toString
      public String toString()
Returns a string that displays and identifies this object's properties. Overrides: `toString` in class `Object` Returns: a String representation of this object

### method:getOffscreenBuffer(java.awt.Component, int, int) [NONE]
- #### getOffscreenBuffer
      public Image getOffscreenBuffer(Component c,
                                      int proposedWidth,
                                      int proposedHeight)
Return the offscreen buffer that should be used as a double buffer with the component `c`. By default there is a double buffer per RepaintManager. The buffer might be smaller than `(proposedWidth,proposedHeight)` This happens when the maximum double buffer size as been set for the receiving repaint manager. Parameters: `c` - the component `proposedWidth` - the width of the buffer `proposedHeight` - the height of the buffer Returns: the image

### method:getVolatileOffscreenBuffer(java.awt.Component, int, int) [NONE]
- #### getVolatileOffscreenBuffer
      public Image getVolatileOffscreenBuffer(Component c,
                                              int proposedWidth,
                                              int proposedHeight)
Return a volatile offscreen buffer that should be used as a double buffer with the specified component `c`. The image returned will be an instance of VolatileImage, or null if a VolatileImage object could not be instantiated. This buffer might be smaller than `(proposedWidth,proposedHeight)`. This happens when the maximum double buffer size has been set for this repaint manager. Parameters: `c` - the component `proposedWidth` - the width of the buffer `proposedHeight` - the height of the buffer Returns: the volatile image Since: 1.4 See Also: `VolatileImage`

### method:setDoubleBufferMaximumSize(java.awt.Dimension) [NONE]
- #### setDoubleBufferMaximumSize
      public void setDoubleBufferMaximumSize(Dimension d)
Set the maximum double buffer size. Parameters: `d` - the dimension

### method:getDoubleBufferMaximumSize() [NONE]
- #### getDoubleBufferMaximumSize
      public Dimension getDoubleBufferMaximumSize()
Returns the maximum double buffer size. Returns: a Dimension object representing the maximum size

### method:setDoubleBufferingEnabled(boolean) [NONE]
- #### setDoubleBufferingEnabled
      public void setDoubleBufferingEnabled(boolean aFlag)
Enables or disables double buffering in this RepaintManager. CAUTION: The default value for this property is set for optimal paint performance on the given platform and it is not recommended that programs modify this property directly. Parameters: `aFlag` - true to activate double buffering See Also: `isDoubleBufferingEnabled()`

### method:isDoubleBufferingEnabled() [NONE]
- #### isDoubleBufferingEnabled
      public boolean isDoubleBufferingEnabled()
Returns true if this RepaintManager is double buffered. The default value for this property may vary from platform to platform. On platforms where native double buffering is supported in the AWT, the default value will be `false` to avoid unnecessary buffering in Swing. On platforms where native double buffering is not supported, the default value will be `true`. Returns: true if this object is double buffered