Example usage for android.view DragEvent getY

Introduction

In this page you can find the example usage for android.view DragEvent getY.

Prototype

public float getY() 

Source Link

Document

Gets the Y coordinate of the drag point.

Usage

From source file:app.umitems.greenclock.widget.sgv.StaggeredGridView.java

@Override
public boolean dispatchDragEvent(DragEvent event) {
    if (!isDragReorderingSupported()) {
        // If the consumer of this StaggeredGridView has not registered a ReorderListener,
        // don't bother handling drag events.
        return super.dispatchDragEvent(event);
    }//w  ww  .j  ava 2  s  .c  o m

    switch (event.getAction()) {
    case DragEvent.ACTION_DRAG_STARTED:
        // Per bug 7071594, we won't be able to catch this event in onDragEvent,
        // so we'll handle the event as it is being dispatched on the way down.
        if (mReorderHelper.hasReorderListener() && mIsDragReorderingEnabled) {
            final View child = getChildAtCoordinate(mTouchDownForDragStartX, mTouchDownForDragStartY);
            if (child != null) {
                // Child can be null if the touch point is not on a child view, but is
                // still within the bounds of this StaggeredGridView (i.e., margins
                // between cells).
                startDragging(child, mTouchDownForDragStartX, mTouchDownForDragStartY);
                // We must return true in order to continue getting future
                // {@link DragEvent}s.
                return true;
            }
        }
        // Be sure to return a value here instead of calling super.dispatchDragEvent()
        // which will unnecessarily dispatch to all the children (since the
        // {@link StaggeredGridView} handles all drag events for our purposes)
        return false;

    case DragEvent.ACTION_DROP:
    case DragEvent.ACTION_DRAG_ENDED:
        if (mDragState == ReorderUtils.DRAG_STATE_DRAGGING) {
            handleDrop((int) event.getX(), (int) event.getY());
        }

        // Return early here to avoid calling super.dispatchDragEvent() which dispatches to
        // children (since this view already can handle all drag events). The super call
        // can also cause a NPE if the view hierarchy changed in the middle of a drag
        // and the {@link DragEvent} gets nulled out. This is a workaround for
        // a framework bug: 8298439.
        // Since the {@link StaggeredGridView} handles all drag events for our purposes,
        // just manually fire the drag event to ourselves.
        return onDragEvent(event);
    }

    // In all other cases, default to the superclass implementation. We need this so that
    // the drag/drop framework will fire off {@link #onDragEvent(DragEvent ev)} calls to us.
    return super.dispatchDragEvent(event);
}

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