/*
* Copyright (C) 2013 47 Degrees, LLC
* http://47deg.com
* hello@47deg.com
*
* Copyright 2012 Roman Nurik
*
* 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.fortysevendeg.android.swipelistview;
import android.annotation.SuppressLint;
import android.graphics.Rect;
import android.os.Handler;
import android.view.*;
import android.widget.AbsListView;
import android.widget.ListView;
import com.nineoldandroids.animation.Animator;
import com.nineoldandroids.animation.AnimatorListenerAdapter;
import com.nineoldandroids.animation.ValueAnimator;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import static com.nineoldandroids.view.ViewHelper.setAlpha;
import static com.nineoldandroids.view.ViewHelper.setTranslationX;
import static com.nineoldandroids.view.ViewPropertyAnimator.animate;
/**
* Touch listener impl for the SwipeListView
*/
@SuppressLint("Recycle")
public class SwipeListViewTouchListener implements View.OnTouchListener {
private int swipeMode = SwipeListView.SWIPE_MODE_BOTH;
private boolean swipeOpenOnLongPress = true;
private boolean swipeClosesAllItemsWhenListMoves = true;
private int swipeFrontView = 0;
private int swipeBackView = 0;
private Rect rect = new Rect();
// Cached ViewConfiguration and system-wide constant values
private int slop;
private int minFlingVelocity;
private int maxFlingVelocity;
private long configShortAnimationTime;
private long animationTime;
private float leftOffset = 0;
private float rightOffset = 0;
// Fixed properties
private SwipeListView swipeListView;
private int viewWidth = 1; // 1 and not 0 to prevent dividing by zero
private List<PendingDismissData> pendingDismisses = new ArrayList<PendingDismissData>();
private int dismissAnimationRefCount = 0;
private float downX;
private boolean swiping;
private VelocityTracker velocityTracker;
private int downPosition;
private View parentView;
private View frontView;
@SuppressWarnings("unused")
private View backView;
private boolean paused;
private int swipeCurrentAction = SwipeListView.SWIPE_ACTION_NONE;
private int swipeActionLeft = SwipeListView.SWIPE_ACTION_REVEAL;
private int swipeActionRight = SwipeListView.SWIPE_ACTION_REVEAL;
private List<Boolean> opened = new ArrayList<Boolean>();
private List<Boolean> openedRight = new ArrayList<Boolean>();
private boolean listViewMoving;
/**
* Constructor
* @param swipeListView SwipeListView
* @param swipeFrontView front view Identifier
* @param swipeBackView back view Identifier
*/
public SwipeListViewTouchListener(SwipeListView swipeListView, int swipeFrontView, int swipeBackView) {
this.swipeFrontView = swipeFrontView;
this.swipeBackView = swipeBackView;
ViewConfiguration vc = ViewConfiguration.get(swipeListView.getContext());
slop = vc.getScaledTouchSlop();
minFlingVelocity = vc.getScaledMinimumFlingVelocity();
maxFlingVelocity = vc.getScaledMaximumFlingVelocity();
configShortAnimationTime = swipeListView.getContext().getResources().getInteger(android.R.integer.config_shortAnimTime);
animationTime = configShortAnimationTime;
this.swipeListView = swipeListView;
}
/**
* Sets current item's parent view
* @param parentView Parent view
*/
private void setParentView(View parentView) {
this.parentView = parentView;
}
/**
* Sets current item's front view
* @param frontView Front view
*/
private void setFrontView(View frontView) {
this.frontView = frontView;
frontView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
swipeListView.onClickFrontView(downPosition);
}
});
if (swipeOpenOnLongPress) {
frontView.setOnLongClickListener(new View.OnLongClickListener() {
@Override
public boolean onLongClick(View v) {
openAnimate(downPosition);
return false;
}
});
}
}
/**
* Set current item's back view
* @param backView
*/
private void setBackView(View backView) {
this.backView = backView;
backView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
swipeListView.onClickBackView(downPosition);
}
});
}
/**
* @return true if the list is in motion
*/
public boolean isListViewMoving() {
return listViewMoving;
}
/**
* Sets animation time when the user drops the cell
*
* @param animationTime milliseconds
*/
public void setAnimationTime(long animationTime) {
if (animationTime > 0) {
this.animationTime = animationTime;
} else {
this.animationTime = configShortAnimationTime;
}
}
/**
* Sets the right offset
*
* @param rightOffset Offset
*/
public void setRightOffset(float rightOffset) {
this.rightOffset = rightOffset;
}
/**
* Set the left offset
*
* @param leftOffset Offset
*/
public void setLeftOffset(float leftOffset) {
this.leftOffset = leftOffset;
}
/**
* Set if all item opened will be close when the user move ListView
*
* @param swipeClosesAllItemsWhenListMoves
*/
public void setSwipeClosesAllItemsWhenListMoves(boolean swipeClosesAllItemsWhenListMoves) {
this.swipeClosesAllItemsWhenListMoves = swipeClosesAllItemsWhenListMoves;
}
/**
* Set if the user can open an item with long press on cell
*
* @param swipeOpenOnLongPress
*/
public void setSwipeOpenOnLongPress(boolean swipeOpenOnLongPress) {
this.swipeOpenOnLongPress = swipeOpenOnLongPress;
}
/**
* Sets the swipe mode
*
* @param swipeMode
*/
public void setSwipeMode(int swipeMode) {
this.swipeMode = swipeMode;
}
/**
* Return action on left
*
* @return Action
*/
public int getSwipeActionLeft() {
return swipeActionLeft;
}
/**
* Set action on left
*
* @param swipeActionLeft Action
*/
public void setSwipeActionLeft(int swipeActionLeft) {
this.swipeActionLeft = swipeActionLeft;
}
/**
* Return action on right
*
* @return Action
*/
public int getSwipeActionRight() {
return swipeActionRight;
}
/**
* Set action on right
*
* @param swipeActionRight Action
*/
public void setSwipeActionRight(int swipeActionRight) {
this.swipeActionRight = swipeActionRight;
}
/**
* Adds new items when adapter is modified
*/
public void resetItems() {
if (swipeListView.getAdapter() != null) {
int count = swipeListView.getAdapter().getCount();
for (int i = opened.size(); i <= count; i++) {
opened.add(false);
openedRight.add(false);
}
}
}
/**
* Open item
* @param position Position of list
*/
protected void openAnimate(int position) {
openAnimate(swipeListView.getChildAt(position - swipeListView.getFirstVisiblePosition()).findViewById(swipeFrontView), position);
}
/**
* Close item
* @param position Position of list
*/
protected void closeAnimate(int position) {
closeAnimate(swipeListView.getChildAt(position - swipeListView.getFirstVisiblePosition()).findViewById(swipeFrontView), position);
}
/**
* Open item
* @param view affected view
* @param position Position of list
*/
private void openAnimate(View view, int position) {
if (!opened.get(position)) {
generateRevealAnimate(view, true, false, position);
}
}
/**
* Close item
* @param view affected view
* @param position Position of list
*/
private void closeAnimate(View view, int position) {
if (opened.get(position)) {
generateRevealAnimate(view, true, false, position);
}
}
/**
* Create animation
* @param view affected view
* @param swap If state should change. If "false" returns to the original position
* @param swapRight If swap is true, this parameter tells if move is to the right or left
* @param position Position of list
*/
private void generateAnimate(final View view, final boolean swap, final boolean swapRight, final int position) {
if (swipeCurrentAction == SwipeListView.SWIPE_ACTION_REVEAL) {
generateRevealAnimate(view, swap, swapRight, position);
}
if (swipeCurrentAction == SwipeListView.SWIPE_ACTION_DISMISS) {
generateDismissAnimate(parentView, swap, swapRight, position);
}
}
/**
* Create dismiss animation
* @param view affected view
* @param swap If will change state. If is "false" returns to the original position
* @param swapRight If swap is true, this parameter tells if move is to the right or left
* @param position Position of list
*/
private void generateDismissAnimate(final View view, final boolean swap, final boolean swapRight, final int position) {
int moveTo = 0;
if (opened.get(position)) {
if (!swap) {
moveTo = openedRight.get(position) ? (int) (viewWidth - rightOffset) : (int) (-viewWidth + leftOffset);
}
} else {
if (swap) {
moveTo = swapRight ? (int) (viewWidth - rightOffset) : (int) (-viewWidth + leftOffset);
}
}
int alpha = 1;
if (swap) {
++dismissAnimationRefCount;
alpha = 0;
}
animate(view)
.translationX(moveTo)
.alpha(alpha)
.setDuration(animationTime)
.setListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
if (swap) {
closeOpenedItems();
performDismiss(view, position);
}
}
});
}
/**
* Create reveal animation
* @param view affected view
* @param swap If will change state. If "false" returns to the original position
* @param swapRight If swap is true, this parameter tells if movement is toward right or left
* @param position list position
*/
private void generateRevealAnimate(final View view, final boolean swap, final boolean swapRight, final int position) {
int moveTo = 0;
if (opened.get(position)) {
if (!swap) {
moveTo = openedRight.get(position) ? (int) (viewWidth - rightOffset) : (int) (-viewWidth + leftOffset);
}
} else {
if (swap) {
moveTo = swapRight ? (int) (viewWidth - rightOffset) : (int) (-viewWidth + leftOffset);
}
}
animate(view)
.translationX(moveTo)
.setDuration(animationTime)
.setListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
swipeListView.resetScrolling();
if (swap) {
boolean aux = !opened.get(position);
opened.set(position, aux);
if (aux) {
swipeListView.onOpened(position, swapRight);
openedRight.set(position, swapRight);
} else {
swipeListView.onClosed(position, openedRight.get(position));
}
}
}
});
}
/**
* Set enabled
* @param enabled
*/
public void setEnabled(boolean enabled) {
paused = !enabled;
}
/**
* Return ScrollListener for ListView
* @return OnScrollListener
*/
public AbsListView.OnScrollListener makeScrollListener() {
return new AbsListView.OnScrollListener() {
@Override
public void onScrollStateChanged(AbsListView absListView, int scrollState) {
setEnabled(scrollState != AbsListView.OnScrollListener.SCROLL_STATE_TOUCH_SCROLL);
if (swipeClosesAllItemsWhenListMoves && scrollState == SCROLL_STATE_TOUCH_SCROLL) {
closeOpenedItems();
}
if (scrollState==SCROLL_STATE_TOUCH_SCROLL) {
listViewMoving = true;
setEnabled(false);
}
if (scrollState != AbsListView.OnScrollListener.SCROLL_STATE_FLING && scrollState != SCROLL_STATE_TOUCH_SCROLL) {
listViewMoving = false;
swipeListView.resetScrolling();
new Handler().postDelayed(new Runnable() {
public void run() {
setEnabled(true);
}
}, 500);
}
}
@Override
public void onScroll(AbsListView absListView, int i, int i1, int i2) {
}
};
}
/**
* Close all opened items
*/
private void closeOpenedItems() {
if (opened != null) {
int start = swipeListView.getFirstVisiblePosition();
int end = swipeListView.getLastVisiblePosition();
for (int i = start; i <= end; i++) {
if (opened.get(i)) {
closeAnimate(swipeListView.getChildAt(i - start).findViewById(swipeFrontView), i);
}
}
}
}
/**
* @see View.OnTouchListener#onTouch(android.view.View, android.view.MotionEvent)
*/
@Override
public boolean onTouch(View view, MotionEvent motionEvent) {
if (viewWidth < 2) {
viewWidth = swipeListView.getWidth();
}
switch (motionEvent.getActionMasked()) {
case MotionEvent.ACTION_DOWN: {
if (paused) {
return false;
}
swipeCurrentAction = SwipeListView.SWIPE_ACTION_NONE;
int childCount = swipeListView.getChildCount();
int[] listViewCoords = new int[2];
swipeListView.getLocationOnScreen(listViewCoords);
int x = (int) motionEvent.getRawX() - listViewCoords[0];
int y = (int) motionEvent.getRawY() - listViewCoords[1];
View child;
for (int i = 0; i < childCount; i++) {
child = swipeListView.getChildAt(i);
child.getHitRect(rect);
if (rect.contains(x, y) && swipeListView.getAdapter().isEnabled(swipeListView.getFirstVisiblePosition() + i)) {
setParentView(child);
setFrontView(child.findViewById(swipeFrontView));
downX = motionEvent.getRawX();
downPosition = swipeListView.getPositionForView(child);
frontView.setClickable(!opened.get(downPosition));
frontView.setLongClickable(!opened.get(downPosition));
velocityTracker = VelocityTracker.obtain();
velocityTracker.addMovement(motionEvent);
if (swipeBackView > 0) {
setBackView(child.findViewById(swipeBackView));
}
break;
}
}
view.onTouchEvent(motionEvent);
return true;
}
case MotionEvent.ACTION_UP: {
if (velocityTracker == null || !swiping) {
break;
}
float deltaX = motionEvent.getRawX() - downX;
velocityTracker.addMovement(motionEvent);
velocityTracker.computeCurrentVelocity(1000);
float velocityX = Math.abs(velocityTracker.getXVelocity());
if (!opened.get(downPosition)) {
if (swipeMode == SwipeListView.SWIPE_MODE_LEFT && velocityTracker.getXVelocity() > 0) {
velocityX = 0;
}
if (swipeMode == SwipeListView.SWIPE_MODE_RIGHT && velocityTracker.getXVelocity() < 0) {
velocityX = 0;
}
}
float velocityY = Math.abs(velocityTracker.getYVelocity());
boolean swap = false;
boolean swapRight = false;
if (minFlingVelocity <= velocityX && velocityX <= maxFlingVelocity && velocityY < velocityX) {
swapRight = velocityTracker.getXVelocity() > 0;
if (opened.get(downPosition) && openedRight.get(downPosition) && swapRight) {
swap = false;
} else if (opened.get(downPosition) && !openedRight.get(downPosition) && !swapRight) {
swap = false;
} else {
swap = true;
}
} else if (Math.abs(deltaX) > viewWidth / 2) {
swap = true;
swapRight = deltaX > 0;
}
generateAnimate(frontView, swap, swapRight, downPosition);
velocityTracker.recycle();
velocityTracker = null;
downX = 0;
// change clickable front view
if (swap) {
frontView.setClickable(opened.get(downPosition));
frontView.setLongClickable(opened.get(downPosition));
}
frontView = null;
backView = null;
this.downPosition = ListView.INVALID_POSITION;
swiping = false;
break;
}
case MotionEvent.ACTION_MOVE: {
if (velocityTracker == null || paused) {
break;
}
velocityTracker.addMovement(motionEvent);
velocityTracker.computeCurrentVelocity(1000);
float velocityX = Math.abs(velocityTracker.getXVelocity());
float velocityY = Math.abs(velocityTracker.getYVelocity());
float deltaX = motionEvent.getRawX() - downX;
float deltaMode = Math.abs(deltaX);
int swipeMode = this.swipeMode;
int changeSwipeMode = swipeListView.changeSwipeMode(downPosition);
if (changeSwipeMode >= 0) {
swipeMode = changeSwipeMode;
}
if (swipeMode == SwipeListView.SWIPE_MODE_NONE) {
deltaMode = 0;
} else if (swipeMode != SwipeListView.SWIPE_MODE_BOTH) {
if (opened.get(downPosition)) {
if (swipeMode == SwipeListView.SWIPE_MODE_LEFT && deltaX < 0) {
deltaMode = 0;
} else if (swipeMode == SwipeListView.SWIPE_MODE_RIGHT && deltaX > 0) {
deltaMode = 0;
}
} else {
if (swipeMode == SwipeListView.SWIPE_MODE_LEFT && deltaX > 0) {
deltaMode = 0;
} else if (swipeMode == SwipeListView.SWIPE_MODE_RIGHT && deltaX < 0) {
deltaMode = 0;
}
}
}
if (deltaMode > slop && swipeCurrentAction == SwipeListView.SWIPE_ACTION_NONE && velocityY < velocityX) {
swiping = true;
boolean swipingRight = (deltaX > 0);
if (opened.get(downPosition)) {
swipeListView.onStartClose(downPosition, swipingRight);
swipeCurrentAction = SwipeListView.SWIPE_ACTION_REVEAL;
} else {
if (swipingRight && swipeActionRight == SwipeListView.SWIPE_ACTION_DISMISS) {
swipeCurrentAction = SwipeListView.SWIPE_ACTION_DISMISS;
} else if (!swipingRight && swipeActionLeft == SwipeListView.SWIPE_ACTION_DISMISS) {
swipeCurrentAction = SwipeListView.SWIPE_ACTION_DISMISS;
} else if (swipingRight && swipeActionRight == SwipeListView.SWIPE_ACTION_CHECK) {
swipeCurrentAction = SwipeListView.SWIPE_ACTION_CHECK;
} else if (!swipingRight && swipeActionLeft == SwipeListView.SWIPE_ACTION_CHECK) {
swipeCurrentAction = SwipeListView.SWIPE_ACTION_CHECK;
} else {
swipeCurrentAction = SwipeListView.SWIPE_ACTION_REVEAL;
}
swipeListView.onStartOpen(downPosition, swipeCurrentAction, swipingRight);
}
swipeListView.requestDisallowInterceptTouchEvent(true);
MotionEvent cancelEvent = MotionEvent.obtain(motionEvent);
cancelEvent.setAction(MotionEvent.ACTION_CANCEL |
(motionEvent.getActionIndex()
<< MotionEvent.ACTION_POINTER_INDEX_SHIFT));
swipeListView.onTouchEvent(cancelEvent);
}
if (swiping) {
if (opened.get(downPosition)) {
deltaX += openedRight.get(downPosition) ? viewWidth - rightOffset : -viewWidth + leftOffset;
}
move(deltaX);
return true;
}
break;
}
}
return false;
}
/**
* Moves the view
* @param deltaX delta
*/
public void move(float deltaX) {
swipeListView.onMove(downPosition, deltaX);
if (swipeCurrentAction == SwipeListView.SWIPE_ACTION_DISMISS) {
setTranslationX(parentView, deltaX);
setAlpha(parentView, Math.max(0f, Math.min(1f,
1f - 2f * Math.abs(deltaX) / viewWidth)));
} else {
setTranslationX(frontView, deltaX);
}
}
/**
* Class that saves pending dismiss data
*/
class PendingDismissData implements Comparable<PendingDismissData> {
public int position;
public View view;
public PendingDismissData(int position, View view) {
this.position = position;
this.view = view;
}
@Override
public int compareTo(PendingDismissData other) {
// Sort by descending position
return other.position - position;
}
}
/**
* Perform dismiss action
* @param dismissView View
* @param dismissPosition Position of list
*/
private void performDismiss(final View dismissView, final int dismissPosition) {
final ViewGroup.LayoutParams lp = dismissView.getLayoutParams();
final int originalHeight = dismissView.getHeight();
ValueAnimator animator = ValueAnimator.ofInt(originalHeight, 1).setDuration(animationTime);
animator.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
--dismissAnimationRefCount;
if (dismissAnimationRefCount == 0) {
// No active animations, process all pending dismisses.
// Sort by descending position
Collections.sort(pendingDismisses);
int[] dismissPositions = new int[pendingDismisses.size()];
for (int i = pendingDismisses.size() - 1; i >= 0; i--) {
dismissPositions[i] = pendingDismisses.get(i).position;
}
swipeListView.onDismiss(dismissPositions);
ViewGroup.LayoutParams lp;
for (PendingDismissData pendingDismiss : pendingDismisses) {
// Reset view presentation
setAlpha(pendingDismiss.view, 1f);
setTranslationX(pendingDismiss.view, 0);
lp = pendingDismiss.view.getLayoutParams();
lp.height = originalHeight;
pendingDismiss.view.setLayoutParams(lp);
}
pendingDismisses.clear();
}
}
});
animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator valueAnimator) {
lp.height = (Integer) valueAnimator.getAnimatedValue();
dismissView.setLayoutParams(lp);
}
});
pendingDismisses.add(new PendingDismissData(dismissPosition, dismissView));
animator.start();
}
}