package com.marshalchen.common.uimodule.swipelayout;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Rect;
import android.support.v4.view.ViewCompat;
import android.support.v4.widget.ViewDragHelper;
import android.util.AttributeSet;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewParent;
import android.widget.Adapter;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.FrameLayout;
import android.widget.ListAdapter;
import com.marshalchen.common.uimodule.R;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public class SwipeLayout extends FrameLayout {
private ViewDragHelper mDragHelper;
private int mDragDistance = 0;
private DragEdge mDragEdge;
private ShowMode mShowMode;
private List<SwipeListener> mSwipeListeners = new ArrayList<SwipeListener>();
private List<SwipeDenier> mSwipeDeniers = new ArrayList<SwipeDenier>();
private Map<View, ArrayList<OnRevealListener>> mRevealListeners = new HashMap<View, ArrayList<OnRevealListener>>();
private Map<View, Boolean> mShowEntirely = new HashMap<View, Boolean>();
private DoubleClickListener mDoubleClickListener;
private boolean mSwipeEnabled = true;
public static enum DragEdge {
Left,
Right,
Top,
Bottom;
};
public static enum ShowMode {
LayDown, PullOut
}
public SwipeLayout(Context context) {
this(context, null);
}
public SwipeLayout(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public SwipeLayout(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
mDragHelper = ViewDragHelper.create(this, mDragHelperCallback);
TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.SwipeLayout);
int ordinal = a.getInt(R.styleable.SwipeLayout_drag_edge, DragEdge.Right.ordinal());
mDragEdge = DragEdge.values()[ordinal];
ordinal = a.getInt(R.styleable.SwipeLayout_show_mode, ShowMode.PullOut.ordinal());
mShowMode = ShowMode.values()[ordinal];
}
public interface SwipeListener{
public void onStartOpen(SwipeLayout layout);
public void onOpen(SwipeLayout layout);
public void onStartClose(SwipeLayout layout);
public void onClose(SwipeLayout layout);
public void onUpdate(SwipeLayout layout, int leftOffset, int topOffset);
public void onHandRelease(SwipeLayout layout, float xvel, float yvel);
}
public void addSwipeListener(SwipeListener l){
mSwipeListeners.add(l);
}
public void removeSwipeListener(SwipeListener l){
mSwipeListeners.remove(l);
}
public static interface SwipeDenier {
/*
* Called in onInterceptTouchEvent
* Determines if this swipe event should be denied
* Implement this interface if you are using views with swipe gestures
* As a child of SwipeLayout
*
* @return true deny
* false allow
*/
public boolean shouldDenySwipe(MotionEvent ev);
}
public void addSwipeDenier(SwipeDenier denier) {
mSwipeDeniers.add(denier);
}
public void removeSwipeDenier(SwipeDenier denier) {
mSwipeDeniers.remove(denier);
}
public void removeAllSwipeDeniers() {
mSwipeDeniers.clear();
}
public interface OnRevealListener {
public void onReveal(View child, DragEdge edge, float fraction, int distance);
}
/**
* bind a view with a specific {@link com.marshalchen.common.uimodule.swipelayout.SwipeLayout.OnRevealListener}
* @param childId the view id.
* @param l the target {@link com.marshalchen.common.uimodule.swipelayout.SwipeLayout.OnRevealListener}
*/
public void addRevealListener(int childId, OnRevealListener l){
View child = findViewById(childId);
if(child == null){
throw new IllegalArgumentException("Child does not belong to SwipeListener.");
}
if(!mShowEntirely.containsKey(child)){
mShowEntirely.put(child, false);
}
if(mRevealListeners.get(child) == null)
mRevealListeners.put(child, new ArrayList<OnRevealListener>());
mRevealListeners.get(child).add(l);
}
/**
* bind multiple views with an {@link com.marshalchen.common.uimodule.swipelayout.SwipeLayout.OnRevealListener}.
* @param childIds the view id.
* @param l the {@link com.marshalchen.common.uimodule.swipelayout.SwipeLayout.OnRevealListener}
*/
public void addRevealListener(int[] childIds, OnRevealListener l){
for(int i : childIds)
addRevealListener(i, l);
}
public void removeRevealListener(int childId, OnRevealListener l){
View child = findViewById(childId);
if(child == null)
return;
mShowEntirely.remove(child);
if(mRevealListeners.containsKey(child))
mRevealListeners.get(child).remove(l);
}
public void removeAllRevealListeners(int childId){
View child = findViewById(childId);
if(child != null){
mRevealListeners.remove(child);
mShowEntirely.remove(child);
}
}
private ViewDragHelper.Callback mDragHelperCallback = new ViewDragHelper.Callback() {
@Override
public int clampViewPositionHorizontal(View child, int left, int dx) {
if(child == getSurfaceView()){
switch (mDragEdge){
case Top:
case Bottom:
return getPaddingLeft();
case Left:
if(left < getPaddingLeft())
return getPaddingLeft();
if(left > getPaddingLeft() + mDragDistance)
return getPaddingLeft() + mDragDistance;
break;
case Right:
if(left > getPaddingLeft())
return getPaddingLeft();
if(left < getPaddingLeft() - mDragDistance)
return getPaddingLeft() - mDragDistance;
break;
}
}else if(child == getBottomView()){
switch (mDragEdge){
case Top:
case Bottom:
return getPaddingLeft();
case Left:
if(mShowMode == ShowMode.PullOut){
if(left > getPaddingLeft())
return getPaddingLeft();
}
break;
case Right:
if(mShowMode == ShowMode.PullOut){
if(left < getMeasuredWidth() - mDragDistance){
return getMeasuredWidth() - mDragDistance;
}
}
break;
}
}
return left;
}
@Override
public int clampViewPositionVertical(View child, int top, int dy) {
if(child == getSurfaceView()){
switch (mDragEdge){
case Left:
case Right:
return getPaddingTop();
case Top:
if(top < getPaddingTop())
return getPaddingTop();
if(top > getPaddingTop() + mDragDistance)
return getPaddingTop() + mDragDistance;
break;
case Bottom:
if(top < getPaddingTop() - mDragDistance){
return getPaddingTop() - mDragDistance;
}
if(top > getPaddingTop()){
return getPaddingTop();
}
}
}else{
switch (mDragEdge){
case Left:
case Right:
return getPaddingTop();
case Top:
if(mShowMode == ShowMode.PullOut){
if(top > getPaddingTop())
return getPaddingTop();
}else{
if(getSurfaceView().getTop() + dy < getPaddingTop())
return getPaddingTop();
if(getSurfaceView().getTop() + dy > getPaddingTop() + mDragDistance)
return getPaddingTop() + mDragDistance;
}
break;
case Bottom:
if(mShowMode == ShowMode.PullOut){
if(top < getMeasuredHeight() - mDragDistance)
return getMeasuredHeight() - mDragDistance;
}else{
if(getSurfaceView().getTop() + dy >= getPaddingTop())
return getPaddingTop();
if(getSurfaceView().getTop() + dy <= getPaddingTop() - mDragDistance)
return getPaddingTop() - mDragDistance;
}
}
}
return top;
}
@Override
public boolean tryCaptureView(View child, int pointerId) {
return child == getSurfaceView() || child == getBottomView();
}
@Override
public int getViewHorizontalDragRange(View child) {
return mDragDistance;
}
@Override
public int getViewVerticalDragRange(View child) {
return mDragDistance;
}
@Override
public void onViewReleased(View releasedChild, float xvel, float yvel) {
super.onViewReleased(releasedChild, xvel, yvel);
for(SwipeListener l : mSwipeListeners)
l.onHandRelease(SwipeLayout.this, xvel, yvel);
if(releasedChild == getSurfaceView()){
processSurfaceRelease(xvel, yvel);
}else if(releasedChild == getBottomView()){
if(getShowMode() == ShowMode.PullOut){
processBottomPullOutRelease(xvel, yvel);
}else if(getShowMode() == ShowMode.LayDown){
processBottomLayDownMode(xvel, yvel);
}
}
invalidate();
}
@Override
public void onViewPositionChanged(View changedView, int left, int top, int dx, int dy) {
int evLeft = getSurfaceView().getLeft(), evRight = getSurfaceView().getRight(),
evTop = getSurfaceView().getTop(),evBottom = getSurfaceView().getBottom();
if(changedView == getSurfaceView()){
if(mShowMode == ShowMode.PullOut){
if(mDragEdge == DragEdge.Left || mDragEdge == DragEdge.Right)
getBottomView().offsetLeftAndRight(dx);
else
getBottomView().offsetTopAndBottom(dy);
}
}else if(changedView == getBottomView()){
if(mShowMode == ShowMode.PullOut){
getSurfaceView().offsetLeftAndRight(dx);
getSurfaceView().offsetTopAndBottom(dy);
}else{
Rect rect = computeBottomLayDown(mDragEdge);
getBottomView().layout(rect.left, rect.top, rect.right, rect.bottom);
int newLeft = getSurfaceView().getLeft() + dx, newTop = getSurfaceView().getTop() + dy;
if(mDragEdge == DragEdge.Left && newLeft < getPaddingLeft()) newLeft = getPaddingLeft();
else if(mDragEdge == DragEdge.Right && newLeft > getPaddingLeft()) newLeft = getPaddingLeft();
else if(mDragEdge == DragEdge.Top && newTop < getPaddingTop()) newTop = getPaddingTop();
else if(mDragEdge == DragEdge.Bottom && newTop > getPaddingTop()) newTop = getPaddingTop();
getSurfaceView().layout(newLeft, newTop, newLeft + getMeasuredWidth(), newTop + getMeasuredHeight());
}
}
dispatchRevealEvent(evLeft, evTop, evRight, evBottom);
dispatchSwipeEvent(evLeft, evTop, dx, dy);
invalidate();
}
};
/**
* the dispatchRevealEvent method may not always get accurate position, it makes the view may not always get the event when the view is
* totally show( fraction = 1), so , we need to calculate every time.
* @param child
* @param relativePosition
* @param edge
* @param surfaceLeft
* @param surfaceTop
* @param surfaceRight
* @param surfaceBottom
* @return
*/
protected boolean isViewTotallyFirstShowed(View child, Rect relativePosition, DragEdge edge, int surfaceLeft, int surfaceTop, int surfaceRight, int surfaceBottom){
if(mShowEntirely.get(child))
return false;
int childLeft = relativePosition.left;
int childRight = relativePosition.right;
int childTop = relativePosition.top;
int childBottom = relativePosition.bottom;
boolean r = false;
if(getShowMode() == ShowMode.LayDown) {
if((edge == DragEdge.Right && surfaceRight <= childLeft)
|| (edge == DragEdge.Left && surfaceLeft >= childRight)
|| (edge == DragEdge.Top && surfaceTop >= childBottom)
|| (edge == DragEdge.Bottom && surfaceBottom <= childTop))
r = true;
}
else if(getShowMode() == ShowMode.PullOut){
if((edge == DragEdge.Right && childRight <= getWidth())
|| (edge == DragEdge.Left && childLeft >= getPaddingLeft())
|| (edge == DragEdge.Top && childTop >= getPaddingTop())
|| (edge == DragEdge.Bottom && childBottom <= getHeight()))
r = true;
}
return r;
}
protected boolean isViewShowing(View child, Rect relativePosition, DragEdge availableEdge, int surfaceLeft, int surfaceTop, int surfaceRight, int surfaceBottom){
int childLeft = relativePosition.left;
int childRight = relativePosition.right;
int childTop = relativePosition.top;
int childBottom = relativePosition.bottom;
if(getShowMode() == ShowMode.LayDown){
switch (availableEdge){
case Right:
if(surfaceRight > childLeft && surfaceRight <= childRight){
return true;
}
break;
case Left:
if(surfaceLeft < childRight && surfaceLeft >= childLeft){
return true;
}
break;
case Top:
if(surfaceTop >= childTop && surfaceTop < childBottom){
return true;
}
break;
case Bottom:
if(surfaceBottom > childTop && surfaceBottom <= childBottom){
return true;
}
break;
}
}else if(getShowMode() == ShowMode.PullOut){
switch (availableEdge){
case Right:
if(childLeft <= getWidth() && childRight > getWidth())
return true;
break;
case Left:
if(childRight >= getPaddingLeft() && childLeft < getPaddingLeft())
return true;
break;
case Top:
if(childTop < getPaddingTop() && childBottom >= getPaddingTop())
return true;
break;
case Bottom:
if(childTop < getHeight() && childTop >= getPaddingTop())
return true;
break;
}
}
return false;
}
protected Rect getRelativePosition(View child){
View t = child;
Rect r = new Rect(t.getLeft(), t.getTop(), 0 , 0);
while(t.getParent() != null && t != getRootView()){
t = (View)t.getParent();
if(t == this)
break;
r.left += t.getLeft();
r.top += t.getTop();
}
r.right = r.left + child.getMeasuredWidth();
r.bottom = r.top + child.getMeasuredHeight();
return r;
}
private int mEventCounter = 0;
protected void dispatchSwipeEvent(int surfaceLeft, int surfaceTop, int dx, int dy){
DragEdge edge = getDragEdge();
boolean open = true;
if(edge == DragEdge.Left){
if(dx < 0) open = false;
}else if(edge == DragEdge.Right){
if(dx > 0) open = false;
}else if(edge == DragEdge.Top){
if(dy < 0) open = false;
}else if(edge == DragEdge.Bottom){
if(dy > 0) open = false;
}
dispatchSwipeEvent(surfaceLeft, surfaceTop, open);
}
protected void dispatchSwipeEvent(int surfaceLeft, int surfaceTop, boolean open){
safeBottomView();
Status status = getOpenStatus();
if(!mSwipeListeners.isEmpty()){
mEventCounter++;
for(SwipeListener l : mSwipeListeners){
if(mEventCounter == 1){
if(open){
l.onStartOpen(this);
}else{
l.onStartClose(this);
}
}
l.onUpdate(SwipeLayout.this, surfaceLeft - getPaddingLeft(), surfaceTop - getPaddingTop());
}
if(status == Status.Close){
for(SwipeListener l : mSwipeListeners){
l.onClose(SwipeLayout.this);
}
mEventCounter = 0;
}
if(status == Status.Open){
getBottomView().setEnabled(true);
for(SwipeListener l : mSwipeListeners){
l.onOpen(SwipeLayout.this);
}
mEventCounter = 0;
}
}
}
/**
* prevent bottom view get any touch event. Especially in LayDown mode.
*/
private void safeBottomView(){
Status status = getOpenStatus();
ViewGroup bottom = getBottomView();
if(status == Status.Close){
if(bottom.getVisibility() != INVISIBLE)
bottom.setVisibility(INVISIBLE);
}else {
if(bottom.getVisibility() != VISIBLE)
bottom.setVisibility(VISIBLE);
}
}
protected void dispatchRevealEvent(final int surfaceLeft, final int surfaceTop, final int surfaceRight, final int surfaceBottom){
if(mRevealListeners.isEmpty()) return;
for(Map.Entry<View, ArrayList<OnRevealListener>> entry : mRevealListeners.entrySet()){
View child = entry.getKey();
Rect rect = getRelativePosition(child);
if(isViewShowing(child,rect, mDragEdge, surfaceLeft, surfaceTop, surfaceRight, surfaceBottom)){
mShowEntirely.put(child, false);
int distance = 0;
float fraction = 0f;
if(getShowMode() == ShowMode.LayDown){
switch (mDragEdge){
case Left:
distance = rect.left - surfaceLeft;
fraction = distance/(float)child.getWidth();
break;
case Right:
distance = rect.right - surfaceRight;
fraction = distance/(float)child.getWidth();
break;
case Top:
distance = rect.top - surfaceTop;
fraction = distance/(float)child.getHeight();
break;
case Bottom:
distance = rect.bottom - surfaceBottom;
fraction = distance/(float)child.getHeight();
break;
}
}else if(getShowMode() == ShowMode.PullOut){
switch (mDragEdge){
case Left:
distance = rect.right - getPaddingLeft();
fraction = distance / (float)child.getWidth();
break;
case Right:
distance = rect.left - getWidth();
fraction = distance / (float)child.getWidth();
break;
case Top:
distance = rect.bottom - getPaddingTop();
fraction = distance/(float)child.getHeight();
break;
case Bottom:
distance = rect.top - getHeight();
fraction = distance/(float)child.getHeight();
break;
}
}
for(OnRevealListener l : entry.getValue()){
l.onReveal(child, mDragEdge, Math.abs(fraction), distance);
if(Math.abs(fraction) == 1){
mShowEntirely.put(child, true);
}
}
}
if(isViewTotallyFirstShowed(child, rect, mDragEdge, surfaceLeft, surfaceTop, surfaceRight, surfaceBottom)){
mShowEntirely.put(child, true);
for(OnRevealListener l : entry.getValue()){
if(mDragEdge == DragEdge.Left || mDragEdge == DragEdge.Right)
l.onReveal(child, mDragEdge, 1, child.getWidth());
else
l.onReveal(child, mDragEdge, 1, child.getHeight());
}
}
}
}
@Override
public void computeScroll() {
super.computeScroll();
if(mDragHelper.continueSettling(true)) {
ViewCompat.postInvalidateOnAnimation(this);
}
}
/**
* {@link android.view.View.OnLayoutChangeListener} added in API 11.
* I need to support it from API 8.
*/
public interface OnLayout{
public void onLayout(SwipeLayout v);
}
private List<OnLayout> mOnLayoutListeners;
public void addOnLayoutListener(OnLayout l){
if(mOnLayoutListeners == null)
mOnLayoutListeners = new ArrayList<OnLayout>();
mOnLayoutListeners.add(l);
}
public void removeOnLayoutListener(OnLayout l){
if(mOnLayoutListeners != null)
mOnLayoutListeners.remove(l);
}
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
int childCount = getChildCount();
if(childCount != 2){
throw new IllegalStateException("You need 2 views in SwipeLayout");
}
if(!(getChildAt(0) instanceof ViewGroup) || !(getChildAt(1) instanceof ViewGroup)){
throw new IllegalArgumentException("The 2 children in SwipeLayout must be an instance of ViewGroup");
}
if(mShowMode == ShowMode.PullOut)
layoutPullOut();
else if(mShowMode == ShowMode.LayDown)
layoutLayDown();
safeBottomView();
if(mOnLayoutListeners != null)
for(int i = 0; i < mOnLayoutListeners.size(); i++){
mOnLayoutListeners.get(i).onLayout(this);
}
}
void layoutPullOut(){
Rect rect = computeSurfaceLayoutArea(false);
getSurfaceView().layout(rect.left, rect.top, rect.right, rect.bottom);
rect = computeBottomLayoutAreaViaSurface(ShowMode.PullOut, rect);
getBottomView().layout(rect.left, rect.top, rect.right, rect.bottom);
bringChildToFront(getSurfaceView());
}
void layoutLayDown(){
Rect rect = computeSurfaceLayoutArea(false);
getSurfaceView().layout(rect.left, rect.top, rect.right, rect.bottom);
rect = computeBottomLayoutAreaViaSurface(ShowMode.LayDown, rect);
getBottomView().layout(rect.left, rect.top, rect.right, rect.bottom);
bringChildToFront(getSurfaceView());
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
if(mDragEdge == DragEdge.Left || mDragEdge == DragEdge.Right)
mDragDistance = getBottomView().getMeasuredWidth();
else
mDragDistance = getBottomView().getMeasuredHeight();
}
private boolean mTouchConsumedByChild = false;
@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
if(!isEnabled() || !isEnabledInAdapterView()){
return true;
}
if(!isSwipeEnabled()){
return false;
}
for (SwipeDenier denier : mSwipeDeniers) {
if (denier != null && denier.shouldDenySwipe(ev)) {
return false;
}
}
//
//if a child wants to handle the touch event,
//then let it do it.
//
int action = ev.getActionMasked();
switch (action){
case MotionEvent.ACTION_DOWN:
Status status = getOpenStatus();
if(status == Status.Close){
mTouchConsumedByChild = childNeedHandleTouchEvent(getSurfaceView(), ev) != null;
}else if(status == Status.Open){
mTouchConsumedByChild = childNeedHandleTouchEvent(getBottomView(), ev) != null;
}
break;
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_CANCEL:
mTouchConsumedByChild = false;
}
if(mTouchConsumedByChild) return false;
return mDragHelper.shouldInterceptTouchEvent(ev);
}
/**
* if the ViewGroup children want to handle this event.
* @param v
* @param event
* @return
*/
private View childNeedHandleTouchEvent(ViewGroup v, MotionEvent event){
if(v == null) return null;
if(v.onTouchEvent(event))
return v;
int childCount = v.getChildCount();
for(int i = childCount - 1; i >= 0; i--){
View child = v.getChildAt(i);
if(child instanceof ViewGroup){
View grandChild = childNeedHandleTouchEvent((ViewGroup) child, event);
if(grandChild != null)
return grandChild;
}else{
if(childNeedHandleTouchEvent(v.getChildAt(i), event))
return v.getChildAt(i);
}
}
return null;
}
/**
* if the view (v) wants to handle this event.
* @param v
* @param event
* @return
*/
private boolean childNeedHandleTouchEvent(View v, MotionEvent event){
if(v == null) return false;
int[] loc = new int[2];
v.getLocationOnScreen(loc);
int left = loc[0], top = loc[1];
if(event.getRawX() > left && event.getRawX() < left + v.getWidth()
&& event.getRawY() > top && event.getRawY() < top + v.getHeight()){
return v.onTouchEvent(event);
}
return false;
}
private float sX = -1 , sY = -1;
@Override
public boolean onTouchEvent(MotionEvent event) {
if(!isEnabledInAdapterView() || !isEnabled())
return true;
if(!isSwipeEnabled())
return super.onTouchEvent(event);
int action = event.getActionMasked();
ViewParent parent = getParent();
gestureDetector.onTouchEvent(event);
Status status = getOpenStatus();
ViewGroup touching = null;
if(status == Status.Close){
touching = getSurfaceView();
}else if(status == Status.Open){
touching = getBottomView();
}
switch (action){
case MotionEvent.ACTION_DOWN:
mDragHelper.processTouchEvent(event);
parent.requestDisallowInterceptTouchEvent(true);
sX = event.getRawX();
sY = event.getRawY();
if(touching != null)
touching.setPressed(true);
return true;
case MotionEvent.ACTION_MOVE:{
if(sX == -1 || sY == -1){
// Trick:
// When in nested mode, we need to send a constructed ACTION_DOWN MotionEvent to mDragHelper, to help
// it initialize itself.
event.setAction(MotionEvent.ACTION_DOWN);
mDragHelper.processTouchEvent(event);
parent.requestDisallowInterceptTouchEvent(true);
sX = event.getRawX();
sY = event.getRawY();
return true;
}
float distanceX = event.getRawX() - sX;
float distanceY = event.getRawY() - sY;
float angle = Math.abs(distanceY / distanceX);
angle = (float)Math.toDegrees(Math.atan(angle));
boolean doNothing = false;
if(mDragEdge == DragEdge.Right){
boolean suitable = (status == Status.Open && distanceX > 0) || (status == Status.Close && distanceX < 0);
suitable = suitable || (status == Status.Middle);
if(angle > 30 || !suitable){
doNothing = true;
}
}
if(mDragEdge == DragEdge.Left){
boolean suitable = (status == Status.Open && distanceX < 0 ) || (status == Status.Close && distanceX > 0);
suitable = suitable || status == Status.Middle;
if(angle > 30 || ! suitable){
doNothing = true;
}
}
if(mDragEdge == DragEdge.Top){
boolean suitable = (status == Status.Open && distanceY < 0 ) || (status == Status.Close && distanceY > 0);
suitable = suitable || status == Status.Middle;
if(angle < 60 || ! suitable){
doNothing = true;
}
}
if(mDragEdge == DragEdge.Bottom){
boolean suitable = (status == Status.Open && distanceY > 0 ) || (status == Status.Close && distanceY < 0);
suitable = suitable || status == Status.Middle;
if(angle < 60 || ! suitable){
doNothing = true;
}
}
if(doNothing){
parent.requestDisallowInterceptTouchEvent(false);
return false;
}else{
if(touching != null){
touching.setPressed(false);
}
parent.requestDisallowInterceptTouchEvent(true);
mDragHelper.processTouchEvent(event);
}
break;
}
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_CANCEL:
{
sX = -1;
sY = -1;
if(touching != null){
touching.setPressed(false);
}
}
default:
parent.requestDisallowInterceptTouchEvent(true);
mDragHelper.processTouchEvent(event);
}
return true;
}
/**
* if working in {@link android.widget.AdapterView}, we should response {@link android.widget.Adapter}
* isEnable(int position).
* @return true when item is enabled, else disabled.
*/
private boolean isEnabledInAdapterView(){
AdapterView adapterView = getAdapterView();
boolean enable = true;
if(adapterView != null){
Adapter adapter = adapterView.getAdapter();
if(adapter != null){
int p = adapterView.getPositionForView(SwipeLayout.this);
if(adapter instanceof BaseAdapter){
enable = ((BaseAdapter) adapter).isEnabled(p);
}else if(adapter instanceof ListAdapter){
enable = ((ListAdapter) adapter).isEnabled(p);
}
}
}
return enable;
}
public void setSwipeEnabled(boolean enabled){
mSwipeEnabled = enabled;
}
public boolean isSwipeEnabled(){
return mSwipeEnabled;
}
private boolean insideAdapterView(){
return getAdapterView() != null;
}
private AdapterView getAdapterView(){
ViewParent t = getParent();
while(t != null){
if(t instanceof AdapterView){
return (AdapterView)t;
}
t = t.getParent();
}
return null;
}
private void performAdapterViewItemClick(MotionEvent e){
ViewParent t = getParent();
while(t != null) {
if(t instanceof AdapterView){
AdapterView view = (AdapterView)t;
int p = view.getPositionForView(SwipeLayout.this);
if( p != AdapterView.INVALID_POSITION &&
view.performItemClick(view.getChildAt(p), p, view.getAdapter().getItemId(p)))
return;
}else{
if(t instanceof View && ((View) t).performClick())
return;
}
t = t.getParent();
}
}
private GestureDetector gestureDetector = new GestureDetector(getContext(), new SwipeDetector());
class SwipeDetector extends GestureDetector.SimpleOnGestureListener{
@Override
public boolean onDown(MotionEvent e) {
return true;
}
/**
* Simulate the touch event lifecycle. If you use SwipeLayout in {@link android.widget.AdapterView}
* ({@link android.widget.ListView}, {@link android.widget.GridView} etc.) It will manually call
* {@link android.widget.AdapterView}.performItemClick, performItemLongClick.
* @param e
* @return
*/
@Override
public boolean onSingleTapUp(MotionEvent e) {
if(mDoubleClickListener == null){
performAdapterViewItemClick(e);
}
return true;
}
@Override
public boolean onSingleTapConfirmed(MotionEvent e) {
if(mDoubleClickListener != null){
performAdapterViewItemClick(e);
}
return true;
}
@Override
public void onLongPress(MotionEvent e) {
performLongClick();
}
@Override
public boolean onDoubleTap(MotionEvent e) {
if(mDoubleClickListener != null){
View target;
ViewGroup bottom = getBottomView();
ViewGroup surface = getSurfaceView();
if(e.getX() > bottom.getLeft() && e.getX() < bottom.getRight()
&& e.getY() > bottom.getTop() && e.getY() < bottom.getBottom()){
target = bottom;
}else{
target = surface;
}
mDoubleClickListener.onDoubleClick(SwipeLayout.this, target == surface);
}
return true;
}
}
public void setDragEdge(DragEdge dragEdge){
mDragEdge = dragEdge;
requestLayout();
}
/**
* set the drag distance, it will force set the bottom view's width or height via this value.
* @param max
*/
public void setDragDistance(int max){
if(max < 0)
throw new IllegalArgumentException("Drag distance can not be < 0");
mDragDistance = dp2px(max);
requestLayout();
}
/**
* There are 2 diffirent show mode.
* {@link com.marshalchen.common.uimodule.swipelayout.SwipeLayout.ShowMode}.PullOut and {@link com.marshalchen.common.uimodule.swipelayout.SwipeLayout.ShowMode}.LayDown.
* @param mode
*/
public void setShowMode(ShowMode mode){
mShowMode = mode;
requestLayout();
}
public DragEdge getDragEdge(){
return mDragEdge;
}
public int getDragDistance(){
return mDragDistance;
}
public ShowMode getShowMode(){
return mShowMode;
}
public ViewGroup getSurfaceView(){
return (ViewGroup)getChildAt(1);
}
public ViewGroup getBottomView(){
return (ViewGroup)getChildAt(0);
}
public enum Status {
Middle , Open, Close
}
/**
* get the open status.
* @return {@link com.marshalchen.common.uimodule.swipelayout.SwipeLayout.Status}
* Open , Close or Middle.
*/
public Status getOpenStatus(){
int surfaceLeft = getSurfaceView().getLeft();
int surfaceTop = getSurfaceView().getTop();
if(surfaceLeft == getPaddingLeft() && surfaceTop == getPaddingTop())
return Status.Close;
if(surfaceLeft == (getPaddingLeft() - mDragDistance) || surfaceLeft == (getPaddingLeft() + mDragDistance)
|| surfaceTop == (getPaddingTop() - mDragDistance) || surfaceTop == (getPaddingTop() + mDragDistance))
return Status.Open;
return Status.Middle;
}
/**
* Process the surface release event.
* @param xvel
* @param yvel
*/
private void processSurfaceRelease(float xvel, float yvel){
if(xvel == 0 && getOpenStatus() == Status.Middle)
close();
if(mDragEdge == DragEdge.Left || mDragEdge == DragEdge.Right){
if(xvel > 0){
if(mDragEdge == DragEdge.Left) open();
else close();
}
if(xvel < 0){
if(mDragEdge == DragEdge.Left) close();
else open();
}
}else{
if(yvel > 0){
if(mDragEdge == DragEdge.Top) open();
else close();
}
if(yvel < 0){
if(mDragEdge == DragEdge.Top) close();
else open();
}
}
}
/**
* process bottom (PullOut mode) hand release event.
* @param xvel
* @param yvel
*/
private void processBottomPullOutRelease(float xvel, float yvel){
if(xvel == 0 && getOpenStatus() == Status.Middle)
close();
if(mDragEdge == DragEdge.Left || mDragEdge == DragEdge.Right){
if(xvel > 0){
if(mDragEdge == DragEdge.Left) open();
else close();
}
if(xvel < 0){
if(mDragEdge == DragEdge.Left) close();
else open();
}
}else{
if(yvel > 0) {
if (mDragEdge == DragEdge.Top) open();
else close();
}
if(yvel < 0){
if(mDragEdge == DragEdge.Top) close();
else open();
}
}
}
/**
* process bottom (LayDown mode) hand release event.
* @param xvel
* @param yvel
*/
private void processBottomLayDownMode(float xvel, float yvel){
if(xvel == 0 && getOpenStatus() == Status.Middle)
close();
int l = getPaddingLeft(), t = getPaddingTop();
if(xvel < 0 && mDragEdge == DragEdge.Right) l -= mDragDistance;
if(xvel > 0 && mDragEdge == DragEdge.Left) l += mDragDistance;
if(yvel > 0 && mDragEdge == DragEdge.Top) t += mDragDistance;
if(yvel < 0 && mDragEdge == DragEdge.Bottom) t -= mDragDistance;
mDragHelper.smoothSlideViewTo(getSurfaceView(), l, t);
invalidate();
}
/**
* smoothly open surface.
*/
public void open(){
open(true, true);
}
public void open(boolean smooth){
open(smooth, true);
}
public void open(boolean smooth, boolean notify){
ViewGroup surface = getSurfaceView(), bottom = getBottomView();
int dx,dy;
Rect rect = computeSurfaceLayoutArea(true);
if(smooth) {
mDragHelper.smoothSlideViewTo(getSurfaceView(), rect.left, rect.top);
}
else{
dx = rect.left - surface.getLeft();
dy = rect.top - surface.getTop();
surface.layout(rect.left, rect.top, rect.right, rect.bottom);
if(getShowMode() == ShowMode.PullOut){
Rect bRect = computeBottomLayoutAreaViaSurface(ShowMode.PullOut, rect);
bottom.layout(bRect.left, bRect.top, bRect.right, bRect.bottom);
}
if(notify) {
dispatchRevealEvent(rect.left, rect.top, rect.right, rect.bottom);
dispatchSwipeEvent(rect.left, rect.top, dx, dy);
}else{
safeBottomView();
}
}
invalidate();
}
/**
* smoothly close surface.
*/
public void close(){
close(true, true);
}
public void close(boolean smooth){
close(smooth, true);
}
/**
* close surface
* @param smooth smoothly or not.
* @param notify if notify all the listeners.
*/
public void close(boolean smooth, boolean notify){
ViewGroup surface = getSurfaceView();
int dx, dy;
if(smooth)
mDragHelper.smoothSlideViewTo(getSurfaceView(), getPaddingLeft(), getPaddingTop());
else {
Rect rect = computeSurfaceLayoutArea(false);
dx = rect.left - surface.getLeft();
dy = rect.top - surface.getTop();
surface.layout(rect.left, rect.top, rect.right, rect.bottom);
if(notify) {
dispatchRevealEvent(rect.left, rect.top, rect.right, rect.bottom);
dispatchSwipeEvent(rect.left, rect.top, dx, dy);
}else{
safeBottomView();
}
}
invalidate();
}
public void toggle(){
toggle(true);
}
public void toggle(boolean smooth){
if(getOpenStatus() == Status.Open)
close(smooth);
else if(getOpenStatus() == Status.Close)
open(smooth);
}
/**
* a helper function to compute the Rect area that surface will hold in.
* @param open open status or close status.
* @return
*/
private Rect computeSurfaceLayoutArea(boolean open){
int l = getPaddingLeft(), t = getPaddingTop();
if(open){
if(mDragEdge == DragEdge.Left) l = getPaddingLeft() + mDragDistance;
else if(mDragEdge == DragEdge.Right) l = getPaddingLeft() - mDragDistance;
else if(mDragEdge == DragEdge.Top) t = getPaddingTop() + mDragDistance;
else t = getPaddingTop() - mDragDistance;
}
return new Rect(l, t, l + getMeasuredWidth(), t + getMeasuredHeight());
}
private Rect computeBottomLayoutAreaViaSurface(ShowMode mode, Rect surfaceArea){
Rect rect = surfaceArea;
int bl = rect.left, bt = rect.top, br = rect.right, bb = rect.bottom;
if(mode == ShowMode.PullOut){
if (mDragEdge == DragEdge.Left) bl = rect.left - mDragDistance;
else if (mDragEdge == DragEdge.Right) bl = rect.right;
else if (mDragEdge == DragEdge.Top) bt = rect.top - mDragDistance;
else bt = rect.bottom;
if (mDragEdge == DragEdge.Left || mDragEdge == DragEdge.Right) {
bb = rect.bottom;
br = bl + getBottomView().getMeasuredWidth();
} else {
bb = bt + getBottomView().getMeasuredHeight();
br = rect.right;
}
}else if(mode == ShowMode.LayDown){
if(mDragEdge == DragEdge.Left) br = bl + mDragDistance;
else if(mDragEdge == DragEdge.Right) bl = br - mDragDistance;
else if(mDragEdge == DragEdge.Top) bb = bt + mDragDistance;
else bt = bb - mDragDistance;
}
return new Rect(bl, bt, br, bb);
}
private Rect computeBottomLayDown(DragEdge dragEdge){
int bl = getPaddingLeft(), bt = getPaddingTop();
int br, bb;
if(dragEdge == DragEdge.Right){
bl = getMeasuredWidth() - mDragDistance;
}else if(dragEdge == DragEdge.Bottom){
bt = getMeasuredHeight() - mDragDistance;
}
if(dragEdge == DragEdge.Left || dragEdge == DragEdge.Right){
br = bl + mDragDistance;
bb = bt + getMeasuredHeight();
}else{
br = bl + getMeasuredWidth();
bb = bt + mDragDistance;
}
return new Rect(bl, bt, br, bb);
}
public void setOnDoubleClickListener(DoubleClickListener doubleClickListener){
mDoubleClickListener = doubleClickListener;
}
public interface DoubleClickListener {
public void onDoubleClick(SwipeLayout layout, boolean surface);
}
private int dp2px(float dp){
return (int) (dp * getContext().getResources().getDisplayMetrics().density + 0.5f);
}
}