Class RepaintManager

public RepaintManager()

Create a new RepaintManager object.

public void addDirtyRegion(JComponent component,
                           int x,
                           int y,
                           int w,
                           int h)

Add a region to the set of dirty regions for a specified component. This involves union'ing the new region with any existing dirty region associated with the component. If the repaintWorker class is not active, insert it in the system event queue.

Parameters:

component - The component to add a dirty region for

x - The left x coordinate of the new dirty region

y - The top y coordinate of the new dirty region

w - The width of the new dirty region

h - The height of the new dirty region

See Also:

addDirtyRegion(JComponent,int,int,int,int), getDirtyRegion(JComponent), isCompletelyDirty(JComponent), markCompletelyClean(JComponent), markCompletelyDirty(JComponent)

public void addInvalidComponent(JComponent component)

Add a component to the invalidComponents vector. If the repaintWorker class is not active, insert it in the system event queue.

Parameters:

component - The component to add

See Also:

removeInvalidComponent(JComponent)

public static RepaintManager currentManager(Component component)

Returns the RepaintManager for the current thread's thread group. The default implementation ignores the component parameter and returns the same repaint manager for all components.

Parameters:

component - a component to look up the manager of

Returns:

the current repaint manager for the calling thread's thread group and the specified component

See Also:

setCurrentManager(RepaintManager)

public static RepaintManager currentManager(JComponent component)

Returns the RepaintManager for the current thread's thread group. The default implementation ignores the component parameter and returns the same repaint manager for all components. This method is only here for backwards compatibility with older versions of Swing and simply forwards to currentManager(Component).

Parameters:

component - a component to look up the manager of

Returns:

the current repaint manager for the calling thread's thread group and the specified component

See Also:

setCurrentManager(RepaintManager)

public Rectangle getDirtyRegion(JComponent component)

Get the dirty region associated with a component, or null if the component has no dirty region.

Parameters:

component - The component to get the dirty region of

Returns:

The dirty region of the component

See Also:

dirtyComponents, addDirtyRegion(JComponent,int,int,int,int), isCompletelyDirty(JComponent), markCompletelyClean(JComponent), markCompletelyDirty(JComponent)

public Dimension getDoubleBufferMaximumSize()

Get the value of the doubleBufferMaximumSize property.

Returns:

The current value of the property

See Also:

setDoubleBufferMaximumSize(Dimension)

public Image getOffscreenBuffer(Component component,
                                int proposedWidth,
                                int proposedHeight)

Get an offscreen buffer for painting a component's image. This image may be smaller than the proposed dimensions, depending on the value of the doubleBufferMaximumSize property.

Parameters:

component - The component to return an offscreen buffer for

proposedWidth - The proposed width of the offscreen buffer

proposedHeight - The proposed height of the offscreen buffer

Returns:

A shared offscreen buffer for painting

public Image getVolatileOffscreenBuffer(Component comp,
                                        int proposedWidth,
                                        int proposedHeight)

Creates and returns a volatile offscreen buffer for the specified component that can be used as a double buffer. The returned image is a VolatileImage. Its size will be (proposedWidth, proposedHeight) except when the maximum double buffer size has been set in this RepaintManager.

Parameters:

comp - the Component for which to create a volatile buffer

proposedWidth - the proposed width of the buffer

proposedHeight - the proposed height of the buffer

Since:

1.4

See Also:

VolatileImage

public boolean isCompletelyDirty(JComponent component)

Return true if the specified component is completely contained within its dirty region, otherwise false

Parameters:

component - The component to check for complete dirtyness

Returns:

Whether the component is completely dirty

See Also:

dirtyComponents, addDirtyRegion(JComponent,int,int,int,int), getDirtyRegion(JComponent), isCompletelyDirty(JComponent), markCompletelyClean(JComponent)

public boolean isDoubleBufferingEnabled()

Get the value of the doubleBufferingEnabled property.

Returns:

The current value of the property

See Also:

setDoubleBufferingEnabled(boolean)

public void markCompletelyClean(JComponent component)

Remove all dirty regions for a specified component

Parameters:

component - The component to mark as clean

See Also:

dirtyComponents, addDirtyRegion(JComponent,int,int,int,int), getDirtyRegion(JComponent), isCompletelyDirty(JComponent), markCompletelyDirty(JComponent)

public void markCompletelyDirty(JComponent component)

Mark a component as dirty over its entire bounds.

Parameters:

component - The component to mark as dirty

See Also:

dirtyComponents, addDirtyRegion(JComponent,int,int,int,int), getDirtyRegion(JComponent), isCompletelyDirty(JComponent), markCompletelyClean(JComponent)

public void paintDirtyRegions()

Repaint all regions of all components which have been marked dirty in the dirtyComponents table.

public void removeInvalidComponent(JComponent component)

Remove a component from the invalidComponents vector.

Parameters:

component - The component to remove

See Also:

addInvalidComponent(JComponent)

public static void setCurrentManager(RepaintManager manager)

Sets the repaint manager for the calling thread's thread group.

Parameters:

manager - the repaint manager to set for the current thread's thread group

See Also:

currentManager(Component)

public void setDoubleBufferMaximumSize(Dimension size)

Set the value of the doubleBufferMaximumSize property.

Parameters:

size - The new value of the property

See Also:

getDoubleBufferMaximumSize()

public void setDoubleBufferingEnabled(boolean buffer)

Set the value of the doubleBufferingEnabled property.

Parameters:

buffer - The new value of the property

See Also:

isDoubleBufferingEnabled()

public String toString()

Overrides:

toString in interface Object

public void validateInvalidComponents()

Validate all components which have been marked invalid in the invalidComponents vector.