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/*
* Copyright (C) 2013 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.dialer.list;
import android.content.ClipData;
import android.graphics.Rect;
import android.util.Log;
import android.view.DragEvent;
import android.view.GestureDetector.SimpleOnGestureListener;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnDragListener;
import com.android.dialer.list.PhoneFavoritesTileAdapter.ContactTileRow;
/**
* Implements the OnLongClickListener and OnDragListener for phone's favorite tiles and rows.
*/
public class PhoneFavoriteDragAndDropListeners {
private static final String TAG = PhoneFavoriteDragAndDropListeners.class.getSimpleName();
private static final boolean DEBUG = false;
private static final float FLING_HEIGHT_PORTION = 1.f / 4.f;
private static final float FLING_WIDTH_PORTION = 1.f / 6.f;
public static class PhoneFavoriteGestureListener extends SimpleOnGestureListener {
private static final float FLING_VELOCITY_MINIMUM = 5.0f;
private float mFlingHorizontalThreshold;
private float mFlingVerticalThreshold;
private final PhoneFavoriteTileView mView;
public PhoneFavoriteGestureListener(View view) {
super();
mView = (PhoneFavoriteTileView) view;
}
@Override
public void onLongPress(MotionEvent event) {
final ClipData data = ClipData.newPlainText("", "");
mView.setPressed(false);
if (mView instanceof PhoneFavoriteRegularRowView) {
// If the view is regular row, start drag the row view.
final View.DragShadowBuilder shadowBuilder =
new View.DragShadowBuilder(mView.getParentRow());
mView.getParentRow().startDrag(data, shadowBuilder, null, 0);
} else {
// If the view is a tile view, start drag the tile.
final View.DragShadowBuilder shadowBuilder = new View.DragShadowBuilder(mView);
mView.startDrag(data, shadowBuilder, null, 0);
}
}
@Override
public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
final float x1 = e1.getX();
final float x2 = e2.getX();
// Temporarily disables parents from getting this event so the listview does not scroll.
mView.getParent().requestDisallowInterceptTouchEvent(true);
mView.setScrollOffset(x2 - x1);
return true;
}
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
// Sets fling trigger threshold.
mFlingVerticalThreshold = (float) mView.getHeight() * FLING_HEIGHT_PORTION;
mFlingHorizontalThreshold = (float) mView.getWidth() * FLING_WIDTH_PORTION;
final float x1 = e1.getX();
final float x2 = e2.getX();
final float y1 = e1.getY();
final float y2 = e2.getY();
mView.setPressed(false);
if (Math.abs(y1 - y2) < mFlingVerticalThreshold &&
Math.abs(x2 - x1) > mFlingHorizontalThreshold &&
Math.abs(velocityX) > FLING_VELOCITY_MINIMUM) {
// If fling is triggered successfully, end the scroll and setup removal dialogue.
final int removeIndex = mView.getParentRow().getItemIndex(mView.getLeft() + x1,
mView.getTop() + y1);
mView.setScrollEnd(false);
mView.setupRemoveDialogue();
mView.getParentRow().getTileAdapter().setPotentialRemoveEntryIndex(removeIndex);
return true;
} else {
mView.setScrollEnd(true);
return false;
}
}
@Override
public boolean onDown(MotionEvent e) {
mView.setPressed(true);
// Signals that the view will accept further events.
return true;
}
@Override
public boolean onSingleTapUp(MotionEvent e) {
mView.performClick();
return true;
}
}
/**
* Implements the OnDragListener to handle drag events.
*/
public static class PhoneFavoriteDragListener implements OnDragListener {
/** Location of the drag event. */
private float mX = 0;
private float mY = 0;
private final ContactTileRow mContactTileRow;
private final PhoneFavoritesTileAdapter mTileAdapter;
public PhoneFavoriteDragListener(ContactTileRow contactTileRow,
PhoneFavoritesTileAdapter tileAdapter) {
super();
mContactTileRow = contactTileRow;
mTileAdapter = tileAdapter;
}
@Override
public boolean onDrag(View v, DragEvent event) {
if (DEBUG) {
Log.v(TAG, event.toString());
}
// Handles drag events.
switch (event.getAction()) {
case DragEvent.ACTION_DRAG_STARTED:
if (mTileAdapter != null && mContactTileRow != null
&& !mTileAdapter.getInDragging()) {
// Gets the current drag location with respect to the whole Dialer view.
mX = event.getX();
mY = event.getY();
if (DEBUG) {
Log.v(TAG, String.valueOf(mX) + "; " + String.valueOf(mY));
}
final int[] rowLocation = new int[2];
mContactTileRow.getLocationOnScreen(rowLocation);
final Rect locationRect = new Rect(rowLocation[0], rowLocation[1],
rowLocation[0] + mContactTileRow.getWidth(),
rowLocation[1] + mContactTileRow.getHeight());
if (locationRect.contains((int) mX, (int) mY)) {
// Finds out which item is being dragged.
// Computes relative coordinates as we get absolute coordinates.
final int dragIndex = mContactTileRow.getItemIndex(
mX - rowLocation[0], mY - rowLocation[1]);
if (DEBUG) {
Log.v(TAG, "Start dragging " + String.valueOf(dragIndex));
}
// Indicates a drag has started.
mTileAdapter.setInDragging(true);
// Temporarily pops out the Contact entry.
mTileAdapter.popContactEntry(dragIndex);
}
}
break;
case DragEvent.ACTION_DRAG_ENTERED:
break;
case DragEvent.ACTION_DRAG_EXITED:
break;
case DragEvent.ACTION_DROP:
// Gets the location of the drag with respect to the whole Dialer view.
mX = event.getX() + v.getLeft();
mY = event.getY() + v.getTop();
if (DEBUG) {
Log.v(TAG, String.valueOf(mX) + "; " + String.valueOf(mY));
}
// Indicates a drag has finished.
if (mTileAdapter != null && mContactTileRow != null) {
mTileAdapter.setInDragging(false);
// Finds out at which position of the list the Contact is being dropped.
final int dropIndex = mContactTileRow.getItemIndex(mX, mY);
if (DEBUG) {
Log.v(TAG, "Stop dragging " + String.valueOf(dropIndex));
}
// Adds the dragged contact to the drop position.
mTileAdapter.dropContactEntry(dropIndex);
}
break;
case DragEvent.ACTION_DRAG_ENDED:
if (mTileAdapter.getInDragging()) {
// If the drag and drop ends when the drop happens outside of any rows,
// we will end the drag here and put the item back to where it was dragged
// from before.
mTileAdapter.setInDragging(false);
mTileAdapter.dropToUnsupportedView();
}
break;
case DragEvent.ACTION_DRAG_LOCATION:
break;
default:
break;
}
return true;
}
}
}
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