/** Start dragging a view. */
private boolean startDrag(View v) {
// Let the DragController initiate a drag-drop sequence.
// I use the dragInfo to pass along the object being dragged.
// I'm not sure how the Launcher designers do this.
mDragging = true;
Object dragInfo = v;
mDragController.startDrag(v, mSelectionDragLayer, dragInfo, DragController.DRAG_ACTION_MOVE);
return true;
}
/**
* Creates the selection layer.
*
* @param context
*/
protected void createSelectionLayer(Context context) {
LayoutInflater inflater =
(LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
mSelectionDragLayer = (DragLayer) inflater.inflate(R.layout.selection_drag_layer, null);
// Make sure it's filling parent
mDragController = new DragController(context);
mDragController.setDragListener(this);
mDragController.addDropTarget(mSelectionDragLayer);
mSelectionDragLayer.setDragController(mDragController);
mStartSelectionHandle = (ImageView) mSelectionDragLayer.findViewById(R.id.startHandle);
mStartSelectionHandle.setTag(new Integer(SELECTION_START_HANDLE));
mEndSelectionHandle = (ImageView) mSelectionDragLayer.findViewById(R.id.endHandle);
mEndSelectionHandle.setTag(new Integer(SELECTION_END_HANDLE));
OnTouchListener handleTouchListener =
new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
boolean handledHere = false;
final int action = event.getAction();
// Down event starts drag for handle.
if (action == MotionEvent.ACTION_DOWN) {
handledHere = startDrag(v);
mLastTouchedSelectionHandle = (Integer) v.getTag();
}
return handledHere;
}
};
mStartSelectionHandle.setOnTouchListener(handleTouchListener);
mEndSelectionHandle.setOnTouchListener(handleTouchListener);
}