Class ColorSpaceFrame 

java.lang.Object
   |
   +----java.awt.Component
           |
           +----java.awt.Container
                   |
                   +----java.awt.Window
                           |
                           +----java.awt.Frame
                                   |
                                   +----ColorSpaceFrame
public class ColorSpaceFrame
extends Frame
implements ObjectReceiver
Class from which all color space frames are derived. It communicates with the message processor and maintains a list of registered updatable components.

See Also:
ObjectReceiver

Variable Index

o filter
Object filter.
o msg_processor
A reference to the message processor.
o rgb
Reference to the main RGB coordinates.
o rgbLocal
Local RGB coordinates used to update components.
o this_window
ID assigned to this object when instantiated.
o updatableComponents
A Vector of registered updatable components.

Constructor Index

o ColorSpaceFrame(short, RGBCoord, MessageProcessor)
Constructs the color space framework.

Method Index

o handleEvent(Event)
This method overrides the default event handler.
o informOthers(int)
This method is called by a component when it has been changed.
o receiveObject(Object)
This method implements the ObjectReceiver interface.
o recomputeCoordinates()
This method is called from the ColorSpaceFrame when this frame has to be updated due to an external event (i.e.
o registerComponent(UpdatableComponentImpl)
Registers an updatable component for this frame.
o updateColorSpaceFrame()
This method is called when the message processor dispatches frame-update events.

Variables

o this_window 
 protected short this_window
ID assigned to this object when instantiated.

o rgb 
 protected RGBCoord rgb
Reference to the main RGB coordinates.

See Also:
RGBCoord
o rgbLocal 
 protected RGBCoord rgbLocal
Local RGB coordinates used to update components.

See Also:
RGBCoord
o msg_processor 
 protected MessageProcessor msg_processor
A reference to the message processor.

See Also:
MessageProcessor
o updatableComponents 
 protected Vector updatableComponents
A Vector of registered updatable components.

o filter 
 public Filter filter
Object filter. Used to filter mouse motion events.

See Also:
Filter

Constructors

o ColorSpaceFrame 
 public ColorSpaceFrame(short this_window,
                        RGBCoord rgb,
                        MessageProcessor msg_processor)
Constructs the color space framework.

Parameters:
this_window - ID assigned to this frame
rgb - reference to the main RGB coordinates
msg_processor - reference to the message processor
See Also:
RGBCoord, MessageProcessor

Methods

o recomputeCoordinates 
 protected void recomputeCoordinates()
This method is called from the ColorSpaceFrame when this frame has to be updated due to an external event (i.e. other frame sent a message). Must be overridden in a subclass. This method uses rgbLocal, not rgb (which is volatile).

o registerComponent 
 protected void registerComponent(UpdatableComponentImpl comp)
Registers an updatable component for this frame.

See Also:
UpdatableComponentImpl
o updateColorSpaceFrame 
 public void updateColorSpaceFrame()
This method is called when the message processor dispatches frame-update events. Computes space-dependent coordinates and updates only if changed and valid.

o informOthers 
 void informOthers(int from_id)
This method is called by a component when it has been changed. If the change resulted in valid RGB values, a filtered event will be dispatched to the message processor.

See Also:
ColorSpaceMsg
o receiveObject 
 public void receiveObject(Object obj)
This method implements the ObjectReceiver interface. A thinned event is passed to the message processor.

Parameters:
obj - an instance of ColorSpaceMsg.
o handleEvent 
 public boolean handleEvent(Event e)
This method overrides the default event handler. It is used to catch WINDOW_DESTROY events and notify the message processor to dispose of this window.

Overrides:
handleEvent in class Component