com.togethersoft.openapi.ide.undo
Interface IdeUndoManager

public interface IdeUndoManager

Class IdeUndoManager allows to track the changes in the model and to discard almost any change.

A "change in model" means modification of the model structure or in any of its elements.

The current state of the model can be obtained using the markState method. Having obtained the state of the model, one can return to that state using the resetChange method.

Author:

TogetherSoft

public boolean canResetState(Object state)

Checks whether is is possible to reset the current state of the model and to set it to the specified state. If such reset is possible, returns true. Otherwise returns false, for example, if the project has been closed.

Parameters:

state - Object that stores the required state of the model

Returns: true if the model can be reset to the specified state, false otherwise.

public Object markState()

Returns an Object that stores the current state of the model.

Returns: Object with the current model state

See Also:

resetState(java.lang.Object)

public void resetState(Object state)

Resets the current state of the model and sets it to the specified state, obtained at some earlier moment by markState method.

Parameters:

state - Object that stores the previous model state

See Also:

canResetState(java.lang.Object)

public boolean wasEssentialChange(Object state)

Checks if any significant changes in the model occurred since the specified state. A "significant" change is a change in the structure of the model or any of its elements, but not a change in the selection, zoom factor etc.

Parameters:

state - Object that stores the reference state

Returns: true if the model has undergone essential modification since the specified state; false otherwise