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JavaTM 2 Platform Std. Ed. v1.3.1 |
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SUMMARY: INNER | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |
java.lang.Object | +--javax.swing.RepaintManager
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.
Constructor Summary | |
RepaintManager()
Create a new RepaintManager instance. |
Method Summary | |
void |
addDirtyRegion(JComponent c,
int x,
int y,
int w,
int h)
Add a component in the list of components that should be refreshed. |
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. |
static RepaintManager |
currentManager(Component c)
Return the RepaintManager for the calling thread given a Component. |
static RepaintManager |
currentManager(JComponent c)
Return the RepaintManager for the calling thread given a JComponent. |
Rectangle |
getDirtyRegion(JComponent aComponent)
Return the current dirty region for a component. |
Dimension |
getDoubleBufferMaximumSize()
Returns the maximum double buffer size. |
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. |
boolean |
isCompletelyDirty(JComponent aComponent)
Convenience method that returns true if aComponent will be completely painted during the next paintDirtyRegions(). |
boolean |
isDoubleBufferingEnabled()
Returns true if this object is double buffered. |
void |
markCompletelyClean(JComponent aComponent)
Mark a component completely clean. |
void |
markCompletelyDirty(JComponent aComponent)
Mark a component completely dirty. |
void |
paintDirtyRegions()
Paint all of the components that have been marked dirty. |
void |
removeInvalidComponent(JComponent component)
Remove a component from the list of invalid components. |
static void |
setCurrentManager(RepaintManager aRepaintManager)
Set the RepaintManager that should be used for the calling thread. |
void |
setDoubleBufferingEnabled(boolean aFlag)
Enables or disables double buffering. |
void |
setDoubleBufferMaximumSize(Dimension d)
Set the maximum double buffer size. |
String |
toString()
Returns a string that displays and identifies this object's properties. |
void |
validateInvalidComponents()
Validate all of the components that have been marked invalid. |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Constructor Detail |
public RepaintManager()
Method Detail |
public static RepaintManager currentManager(Component c)
c
- a Component -- unused in the default implementation, but could
be used by an overridden version to return a different RepaintManager
depending on the Componentpublic static RepaintManager currentManager(JComponent c)
Note: This method exists for backward binary compatibility with earlier
versions of the Swing library. It simply returns the result returned by
currentManager(Component)
.
c
- a JComponent -- unusedpublic static void setCurrentManager(RepaintManager aRepaintManager)
aRepaintManager
- the RepaintManager object to usepublic void addInvalidComponent(JComponent invalidComponent)
JComponent.isValidateRoot()
,
removeInvalidComponent(javax.swing.JComponent)
public void removeInvalidComponent(JComponent component)
addInvalidComponent(javax.swing.JComponent)
public void addDirtyRegion(JComponent c, int x, int y, int w, int h)
JComponent.repaint(long, int, int, int, int)
public Rectangle getDirtyRegion(JComponent aComponent)
public void markCompletelyDirty(JComponent aComponent)
public void markCompletelyClean(JComponent aComponent)
public boolean isCompletelyDirty(JComponent aComponent)
public void validateInvalidComponents()
addInvalidComponent(javax.swing.JComponent)
public void paintDirtyRegions()
addDirtyRegion(javax.swing.JComponent, int, int, int, int)
public String toString()
toString
in class Object
public Image getOffscreenBuffer(Component c, int proposedWidth, int proposedHeight)
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.public void setDoubleBufferMaximumSize(Dimension d)
public Dimension getDoubleBufferMaximumSize()
public void setDoubleBufferingEnabled(boolean aFlag)
aFlag
- true to activate double bufferingpublic boolean isDoubleBufferingEnabled()
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JavaTM 2 Platform Std. Ed. v1.3.1 |
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