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package com.android.dialer.list;
import android.util.Log;
import android.view.View;
import java.util.ArrayList;
import java.util.List;
/**
* Class that handles and combines drag events generated from multiple views, and then fires
* off events to any OnDragDropListeners that have registered for callbacks.
*/
public class DragDropController {
private final List<OnDragDropListener> mOnDragDropListeners =
new ArrayList<OnDragDropListener>();
private final DragItemContainer mDragItemContainer;
private final int[] mLocationOnScreen = new int[2];
/**
* Callback interface used to retrieve views based on the current touch coordinates of the
* drag event. The {@link DragItemContainer} houses the draggable views that this
* {@link DragDropController} controls.
*/
public interface DragItemContainer {
public PhoneFavoriteSquareTileView getViewForLocation(int x, int y);
}
public DragDropController(DragItemContainer dragItemContainer) {
mDragItemContainer = dragItemContainer;
}
/**
* @return True if the drag is started, false if the drag is cancelled for some reason.
*/
boolean handleDragStarted(int x, int y) {
final PhoneFavoriteSquareTileView tileView = mDragItemContainer.getViewForLocation(x, y);
if (tileView == null) {
return false;
}
for (int i = 0; i < mOnDragDropListeners.size(); i++) {
mOnDragDropListeners.get(i).onDragStarted(x, y, tileView);
}
return true;
}
public void handleDragHovered(View v, int x, int y) {
v.getLocationOnScreen(mLocationOnScreen);
final int screenX = x + mLocationOnScreen[0];
final int screenY = y + mLocationOnScreen[1];
final PhoneFavoriteSquareTileView view = mDragItemContainer.getViewForLocation(
screenX, screenY);
for (int i = 0; i < mOnDragDropListeners.size(); i++) {
mOnDragDropListeners.get(i).onDragHovered(screenX, screenY, view);
}
}
public void handleDragFinished(int x, int y, boolean isRemoveView) {
if (isRemoveView) {
for (int i = 0; i < mOnDragDropListeners.size(); i++) {
mOnDragDropListeners.get(i).onDroppedOnRemove();
}
}
for (int i = 0; i < mOnDragDropListeners.size(); i++) {
mOnDragDropListeners.get(i).onDragFinished(x, y);
}
}
public void addOnDragDropListener(OnDragDropListener listener) {
if (!mOnDragDropListeners.contains(listener)) {
mOnDragDropListeners.add(listener);
}
}
public void removeOnDragDropListener(OnDragDropListener listener) {
if (mOnDragDropListeners.contains(listener)) {
mOnDragDropListeners.remove(listener);
}
}
}
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