com.alkacon.geranium.client.dnd

Interface I_DropTarget

public interface I_DropTarget

Interface defining all methods needed for a drag and drop target. These will mostly be called by the drag and drop handler.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	checkPosition(int x, int y, DNDHandler.Orientation orientation) Returns true if the given cursor position is over the drop target.
com.google.gwt.dom.client.Element	getElement() Returns the drop target element.
int	getPlaceholderIndex() Returns the index of the placeholder or -1 if no placeholder is attached.
void	insertPlaceholder(com.google.gwt.dom.client.Element placeholder, int x, int y, DNDHandler.Orientation orientation) Inserts a new placeholder.
void	onDrop(I_Draggable draggable) Executed on drop.
void	removePlaceholder() Removes the placeholder.
void	repositionPlaceholder(int x, int y, DNDHandler.Orientation orientation) Repositions the placeholder.

Method Detail

checkPosition

boolean checkPosition(int x,
                    int y,
                    DNDHandler.Orientation orientation)

Returns true if the given cursor position is over the drop target.

Parameters:

x - the cursor client x position

y - the cursor client y position

orientation - the drag and drop orientation

Returns:

true if the given cursor position is over the drop target

getElement

com.google.gwt.dom.client.Element getElement()

Returns the drop target element.

This must be the element, where all children will be attached.

Returns:

the element

getPlaceholderIndex

int getPlaceholderIndex()

Returns the index of the placeholder or -1 if no placeholder is attached.

Returns:

the index

insertPlaceholder

void insertPlaceholder(com.google.gwt.dom.client.Element placeholder,
                     int x,
                     int y,
                     DNDHandler.Orientation orientation)

Inserts a new placeholder.

Parameters:

placeholder - the placeholder element

x - the cursor client x position

y - the cursor client y position

orientation - the drag and drop orientation

onDrop

void onDrop(I_Draggable draggable)

Executed on drop.

Parameters:

draggable - the draggable being dropped

removePlaceholder

void removePlaceholder()

Removes the placeholder.

repositionPlaceholder

void repositionPlaceholder(int x,
                         int y,
                         DNDHandler.Orientation orientation)

Repositions the placeholder.

Parameters:

x - the cursor client x position

y - the cursor client y position

orientation - the drag and drop orientation