Transitionable

All Known Subinterfaces:

ImageTransitionable
```
public interface Transitionable
```
Object implementing this interface enables the TransitionManager to carry out transition effects either on it or on the object it's delegate for.

A "transitionable" widget is a widget that can provide a set of methods to a TransitionManager either through direct implementation of this interface or through delegation by providing a delegate object implementing this interface.

A "transitionable" widget is supposed to have a list of Control objects of at least one Control object. Each Control object has an index that's used to get and set the current viewed Control object using the getSelection() and setSelection(int) method. The index is also used to get the corresponding Control object using getControl(int) method.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method and Description
`void`	`addSelectionListener(org.eclipse.swt.events.SelectionListener listener)` This method is called once by the `TransitionManager`'s constructor to add a `SelectionListener` to the "transitionable" widget to start the transition effect whenever the widget is selected.
`org.eclipse.swt.widgets.Composite`	`getComposite()` returns the `Composite` at which the transition should be shown.
`org.eclipse.swt.widgets.Control`	`getControl(int index)` returns the `Control` object at index index
`double`	`getDirection(int toIndex, int fromIndex)` should compare toIndex with fromIndex and return the required direction of the transition.
`int`	`getSelection()` returns the index of the current selected `Control` object
`void`	`setSelection(int index)` sets the current selected `Control` object

- Method Detail
  - addSelectionListener
```
void addSelectionListener(org.eclipse.swt.events.SelectionListener listener)
```
    This method is called once by the TransitionManager's constructor to add a SelectionListener to the "transitionable" widget to start the transition effect whenever the widget is selected.
    
    Parameters:
    
    listener - the SelectionListener instance provided by the TransitionManager
  - getControl
```
org.eclipse.swt.widgets.Control getControl(int index)
```
    returns the Control object at index index
    
    Parameters:
    
    index - the index of the Control object to return
    
    Returns:
    
    the Control object at the specified index
  - getComposite
```
org.eclipse.swt.widgets.Composite getComposite()
```
    returns the Composite at which the transition should be shown. It could be considered the composite that contains all Control objects.
    
    Returns:
    
    the composite at which the transition should be shown
  - getSelection
```
int getSelection()
```
    returns the index of the current selected Control object
    
    Returns:
    
    the index of the current selected Control object
  - setSelection
```
void setSelection(int index)
```
    sets the current selected Control object
    
    Parameters:
    
    index - the index of the Control object to be set as the current selection
  - getDirection
```
double getDirection(int toIndex,
                    int fromIndex)
```
    should compare toIndex with fromIndex and return the required direction of the transition.
    
    Parameters:
    
    toIndex - index of the Control object to make transition to
    
    fromIndex - index of the Control object to make transition from
    
    Returns:
    
    the required direction

Interface Transitionable

Method Summary

Method Detail

addSelectionListener

getControl

getComposite

getSelection

setSelection

getDirection