com.dlsc.flexgantt.policy.layer
Class DefaultDragAndDropPolicy

java.lang.Object
  com.dlsc.flexgantt.policy.AbstractPolicy
      com.dlsc.flexgantt.policy.layer.DefaultDragAndDropPolicy

All Implemented Interfaces:

IPolicy, IDragAndDropPolicy

public class DefaultDragAndDropPolicy
extends AbstractPolicy
implements IDragAndDropPolicy

The default implmementation of the drag & drop policy. For a general description of this policy please refer to the policy interface IDragAndDropPolicy.

Since:

1.0

Author:

Dirk Lemmermann

Constructor Summary

DefaultDragAndDropPolicy()

Method Summary

int	getDragActions(java.lang.Object node, java.lang.Object timelineObject, IGanttChartModel model) Determines how the given timeline object can be dragged (copy, move, copy or move, none).
ICommand	getDragAndDropCommand(java.lang.Object node, java.lang.Object droppedTimelineObject, IGanttChartModel model, java.lang.Object newNode, IGanttChartModel newModel, long newStartTime, java.lang.Object[] timelineObjects, ILayer layer, int dropAction) Returns a command object that will be used to make the necessary modifications to the models when the user dragged several timeline objects from one row to another at the same time.
int	getDropActions(java.lang.Object node, java.lang.Object timelineObject, IGanttChartModel model, java.lang.Object newNode, IGanttChartModel newModel, long newStartTime) Determines whether the new location as specified by the new tree node, new model and new time span can be used as a drop location for the given timeline object.

Methods inherited from class com.dlsc.flexgantt.policy.AbstractPolicy

assertClass

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DefaultDragAndDropPolicy

public DefaultDragAndDropPolicy()

Method Detail

getDragActions

public int getDragActions(java.lang.Object node,
                          java.lang.Object timelineObject,
                          IGanttChartModel model)

Description copied from interface: IDragAndDropPolicy

Determines how the given timeline object can be dragged (copy, move, copy or move, none). The possible values for the return value are defined as constants in the DnDConstants class.

Specified by:

getDragActions in interface IDragAndDropPolicy

Parameters:

node - the tree node that owns the timeline object

timelineObject - the timeline object that has to participate in a drag and drop operation

model - the data source of the tree node and the timeline object

Returns:

a drag and drop constant, which specifies what kind of drag and drop operations can be performed

getDropActions

public int getDropActions(java.lang.Object node,
                          java.lang.Object timelineObject,
                          IGanttChartModel model,
                          java.lang.Object newNode,
                          IGanttChartModel newModel,
                          long newStartTime)

Description copied from interface: IDragAndDropPolicy

Determines whether the new location as specified by the new tree node, new model and new time span can be used as a drop location for the given timeline object.

Specified by:

getDropActions in interface IDragAndDropPolicy

Parameters:

node - the tree node that owns the timeline object

timelineObject - the timeline object that has to participate in a drag and drop operation

model - the data source of the tree node and the timeline object

newNode - the tree node that will be the new owner of the timeline object

newModel - the data source of the new tree node owner

newStartTime - the time point that will be the new start time of the timeline object

Returns:

a drag and drop action, which specifies what kind of drop operation can be performed on the given node and time point (possible values are defined in DnDConstants

getDragAndDropCommand

public ICommand getDragAndDropCommand(java.lang.Object node,
                                      java.lang.Object droppedTimelineObject,
                                      IGanttChartModel model,
                                      java.lang.Object newNode,
                                      IGanttChartModel newModel,
                                      long newStartTime,
                                      java.lang.Object[] timelineObjects,
                                      ILayer layer,
                                      int dropAction)

Description copied from interface: IDragAndDropPolicy

Returns a command object that will be used to make the necessary modifications to the models when the user dragged several timeline objects from one row to another at the same time.

Specified by:

getDragAndDropCommand in interface IDragAndDropPolicy

Parameters:

node - the tree node that owns the timeline objects

droppedTimelineObject - the timeline object that was dragged and dropped

model - the data source of the tree node and the timeline objects

newNode - the tree node that will be the new owner of the timeline objects

newModel - the data source of the new tree node owner

newStartTime - the time point that will be the new start time of the timeline object

timelineObjects - the timeline objects that might have to participate in a drag and drop operation because they were selected at the same time

layer - the layer on which the drag and drop operation takes place

dropAction - an value used to distinguish between different types of drop operations (possible values listed in DnDConstants

Returns:

a command object that has to make the necessary model changes