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*
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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/**
* The <code>DropTargetDragEvent</code> is delivered to a
* <code>DropTargetListener</code> via its
* dragEnter() and dragOver() methods.
* <p>
* The <code>DropTargetDragEvent</code> reports the <i>source drop actions</i>
* and the <i>user drop action</i> that reflect the current state of
* the drag operation.
* <p>
* <i>Source drop actions</i> is a bitwise mask of <code>DnDConstants</code>
* that represents the set of drop actions supported by the drag source for
* this drag operation.
* <p>
* <i>User drop action</i> depends on the drop actions supported by the drag
* source and the drop action selected by the user. The user can select a drop
* action by pressing modifier keys during the drag operation:
* <pre>
* Ctrl + Shift -> ACTION_LINK
* Ctrl -> ACTION_COPY
* Shift -> ACTION_MOVE
* </pre>
* If the user selects a drop action, the <i>user drop action</i> is one of
* <code>DnDConstants</code> that represents the selected drop action if this
* drop action is supported by the drag source or
* <code>DnDConstants.ACTION_NONE</code> if this drop action is not supported
* by the drag source.
* <p>
* If the user doesn't select a drop action, the set of
* <code>DnDConstants</code> that represents the set of drop actions supported
* by the drag source is searched for <code>DnDConstants.ACTION_MOVE</code>,
* then for <code>DnDConstants.ACTION_COPY</code>, then for
* <code>DnDConstants.ACTION_LINK</code> and the <i>user drop action</i> is the
* first constant found. If no constant is found the <i>user drop action</i>
* is <code>DnDConstants.ACTION_NONE</code>.
*
* @since 1.2
*/
/**
* Construct a <code>DropTargetDragEvent</code> given the
* <code>DropTargetContext</code> for this operation,
* the location of the "Drag" <code>Cursor</code>'s hotspot
* in the <code>Component</code>'s coordinates, the
* user drop action, and the source drop actions.
* <P>
* @param dtc The DropTargetContext for this operation
* @param cursorLocn The location of the "Drag" Cursor's
* hotspot in Component coordinates
* @param dropAction The user drop action
* @param srcActions The source drop actions
*
* @throws NullPointerException if cursorLocn is null
* @throws <code>IllegalArgumentException</code> if dropAction is not one of
* <code>DnDConstants</code>.
* @throws <code>IllegalArgumentException</code> if srcActions is not
* a bitwise mask of <code>DnDConstants</code>.
* @throws <code>IllegalArgumentException</code> if dtc is <code>null</code>.
*/
public DropTargetDragEvent(DropTargetContext dtc, Point cursorLocn, int dropAction, int srcActions) {
super(dtc);
if ((srcActions & ~(DnDConstants.ACTION_COPY_OR_MOVE | DnDConstants.ACTION_LINK)) != 0) throw new IllegalArgumentException("srcActions");
this.dropAction = dropAction;
}
/**
* This method returns a <code>Point</code>
* indicating the <code>Cursor</code>'s current
* location within the <code>Component'</code>s
* coordinates.
* <P>
* @return the current cursor location in
* <code>Component</code>'s coords.
*/
return location;
}
/**
* This method returns the current <code>DataFlavor</code>s from the
* <code>DropTargetContext</code>.
* <P>
* @return current DataFlavors from the DropTargetContext
*/
return getDropTargetContext().getCurrentDataFlavors();
}
/**
* This method returns the current <code>DataFlavor</code>s
* as a <code>java.util.List</code>
* <P>
* @return a <code>java.util.List</code> of the Current <code>DataFlavor</code>s
*/
return getDropTargetContext().getCurrentDataFlavorsAsList();
}
/**
* This method returns a <code>boolean</code> indicating
* if the specified <code>DataFlavor</code> is supported.
* <P>
* @param df the <code>DataFlavor</code> to test
* <P>
* @return if a particular DataFlavor is supported
*/
}
/**
* This method returns the source drop actions.
*
* @return the source drop actions
*/
/**
* This method returns the user drop action.
*
* @return the user drop action
*/
/**
* This method returns the Transferable object that represents
* the data associated with the current drag operation.
*
* @return the Transferable associated with the drag operation
* @throws InvalidDnDOperationException if the data associated with the drag
* operation is not available
*
* @since 1.5
*/
return getDropTargetContext().getTransferable();
}
/**
* Accepts the drag.
*
* This method should be called from a
* <code>DropTargetListeners</code> <code>dragEnter</code>,
* <code>dragOver</code>, and <code>dropActionChanged</code>
* methods if the implementation wishes to accept an operation
* from the srcActions other than the one selected by
* the user as represented by the <code>dropAction</code>.
*
* @param dragOperation the operation accepted by the target
*/
}
/**
* Rejects the drag as a result of examining either the
* <code>dropAction</code> or the available <code>DataFlavor</code>
* types.
*/
public void rejectDrag() {
}
/*
* fields
*/
/**
* The location of the drag cursor's hotspot in Component coordinates.
*
* @serial
*/
/**
* The source drop actions.
*
* @serial
*/
private int actions;
/**
* The user drop action.
*
* @serial
*/
private int dropAction;
}