package com.marshalchen.common.uimodule.jazzyviewpager;
import android.annotation.TargetApi;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Camera;
import android.graphics.Color;
import android.graphics.Matrix;
import android.os.Build;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import com.marshalchen.common.uimodule.R;
import com.marshalchen.common.uimodule.nineoldandroids.view.ViewHelper;
import java.util.HashMap;
import java.util.LinkedHashMap;
public class JazzyViewPager extends ViewPager {
public static final String TAG = "JazzyViewPager";
private boolean mEnabled = true;
private boolean mFadeEnabled = false;
private boolean mOutlineEnabled = false;
public static int sOutlineColor = Color.WHITE;
private TransitionEffect mEffect = TransitionEffect.Standard;
private HashMap<Integer, Object> mObjs = new LinkedHashMap<Integer, Object>();
private static final float SCALE_MAX = 0.5f;
private static final float ZOOM_MAX = 0.5f;
private static final float ROT_MAX = 15.0f;
public enum TransitionEffect {
Standard,
Tablet,
CubeIn,
CubeOut,
FlipVertical,
FlipHorizontal,
Stack,
ZoomIn,
ZoomOut,
RotateUp,
RotateDown,
Accordion
}
private static final boolean API_11;
static {
API_11 = Build.VERSION.SDK_INT >= 11;
}
public JazzyViewPager(Context context) {
this(context, null);
}
@SuppressWarnings("incomplete-switch")
public JazzyViewPager(Context context, AttributeSet attrs) {
super(context, attrs);
setClipChildren(false);
// now style everything!
TypedArray ta = context.obtainStyledAttributes(attrs, R.styleable.JazzyViewPager);
int effect = ta.getInt(R.styleable.JazzyViewPager_style, 0);
String[] transitions = getResources().getStringArray(R.array.jazzy_effects);
setTransitionEffect(TransitionEffect.valueOf(transitions[effect]));
setFadeEnabled(ta.getBoolean(R.styleable.JazzyViewPager_fadeEnabled, false));
setOutlineEnabled(ta.getBoolean(R.styleable.JazzyViewPager_outlineEnabled, false));
setOutlineColor(ta.getColor(R.styleable.JazzyViewPager_outlineColor, Color.WHITE));
switch (mEffect) {
case Stack:
case ZoomOut:
setFadeEnabled(true);
}
ta.recycle();
}
public void setTransitionEffect(TransitionEffect effect) {
mEffect = effect;
// reset();
}
public void setPagingEnabled(boolean enabled) {
mEnabled = enabled;
}
public void setFadeEnabled(boolean enabled) {
mFadeEnabled = enabled;
}
public boolean getFadeEnabled() {
return mFadeEnabled;
}
public void setOutlineEnabled(boolean enabled) {
mOutlineEnabled = enabled;
wrapWithOutlines();
}
public void setOutlineColor(int color) {
sOutlineColor = color;
}
private void wrapWithOutlines() {
for (int i = 0; i < getChildCount(); i++) {
View v = getChildAt(i);
if (!(v instanceof OutlineContainer)) {
removeView(v);
super.addView(wrapChild(v), i);
}
}
}
private View wrapChild(View child) {
if (!mOutlineEnabled || child instanceof OutlineContainer) return child;
OutlineContainer out = new OutlineContainer(getContext());
out.setLayoutParams(generateDefaultLayoutParams());
child.setLayoutParams(new OutlineContainer.LayoutParams(
LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
out.addView(child);
return out;
}
public void addView(View child) {
super.addView(wrapChild(child));
}
public void addView(View child, int index) {
super.addView(wrapChild(child), index);
}
public void addView(View child, LayoutParams params) {
super.addView(wrapChild(child), params);
}
public void addView(View child, int width, int height) {
super.addView(wrapChild(child), width, height);
}
public void addView(View child, int index, LayoutParams params) {
super.addView(wrapChild(child), index, params);
}
@Override
public boolean onInterceptTouchEvent(MotionEvent arg0) {
return mEnabled ? super.onInterceptTouchEvent(arg0) : false;
}
private State mState;
private int oldPage;
private View mLeft;
private View mRight;
private float mRot;
private float mTrans;
private float mScale;
private enum State {
IDLE,
GOING_LEFT,
GOING_RIGHT
}
// public void reset() {
// resetPrivate();
// int curr = getCurrentItem();
// onPageScrolled(curr, 0.0f, 0);
//}
//
//private void resetPrivate() {
// for (int i = 0; i < getChildCount(); i++) {
// View v = getChildAt(i);
// // ViewHelper.setRotation(v, -ViewHelper.getRotation(v));
// // ViewHelper.setRotationX(v, -ViewHelper.getRotationX(v));
// // ViewHelper.setRotationY(v, -ViewHelper.getRotationY(v));
// //
// // ViewHelper.setTranslationX(v, -ViewHelper.getTranslationX(v));
// // ViewHelper.setTranslationY(v, -ViewHelper.getTranslationY(v));
//
// ViewHelper.setRotation(v, 0);
// ViewHelper.setRotationX(v, 0);
// ViewHelper.setRotationY(v, 0);
//
// ViewHelper.setTranslationX(v, 0);
// ViewHelper.setTranslationY(v, 0);
//
// ViewHelper.setAlpha(v, 1.0f);
//
// ViewHelper.setScaleX(v, 1.0f);
// ViewHelper.setScaleY(v, 1.0f);
//
// ViewHelper.setPivotX(v, 0);
// ViewHelper.setPivotY(v, 0);
//
// logState(v, "Child " + i);
// }
//}
private void logState(View v, String title) {
Log.v(TAG, title + ": ROT (" + ViewHelper.getRotation(v) + ", " +
ViewHelper.getRotationX(v) + ", " +
ViewHelper.getRotationY(v) + "), TRANS (" +
ViewHelper.getTranslationX(v) + ", " +
ViewHelper.getTranslationY(v) + "), SCALE (" +
ViewHelper.getScaleX(v) + ", " +
ViewHelper.getScaleY(v) + "), ALPHA " +
ViewHelper.getAlpha(v));
}
protected void animateScroll(int position, float positionOffset) {
if (mState != State.IDLE) {
mRot = (float) (1 - Math.cos(2 * Math.PI * positionOffset)) / 2 * 30.0f;
ViewHelper.setRotationY(this, mState == State.GOING_RIGHT ? mRot : -mRot);
ViewHelper.setPivotX(this, getMeasuredWidth() * 0.5f);
ViewHelper.setPivotY(this, getMeasuredHeight() * 0.5f);
}
}
protected void animateTablet(View left, View right, float positionOffset) {
if (mState != State.IDLE) {
if (left != null) {
manageLayer(left, true);
mRot = 30.0f * positionOffset;
mTrans = getOffsetXForRotation(mRot, left.getMeasuredWidth(),
left.getMeasuredHeight());
ViewHelper.setPivotX(left, left.getMeasuredWidth() / 2);
ViewHelper.setPivotY(left, left.getMeasuredHeight() / 2);
ViewHelper.setTranslationX(left, mTrans);
ViewHelper.setRotationY(left, mRot);
logState(left, "Left");
}
if (right != null) {
manageLayer(right, true);
mRot = -30.0f * (1 - positionOffset);
mTrans = getOffsetXForRotation(mRot, right.getMeasuredWidth(),
right.getMeasuredHeight());
ViewHelper.setPivotX(right, right.getMeasuredWidth() * 0.5f);
ViewHelper.setPivotY(right, right.getMeasuredHeight() * 0.5f);
ViewHelper.setTranslationX(right, mTrans);
ViewHelper.setRotationY(right, mRot);
logState(right, "Right");
}
}
}
private void animateCube(View left, View right, float positionOffset, boolean in) {
if (mState != State.IDLE) {
if (left != null) {
manageLayer(left, true);
mRot = (in ? 90.0f : -90.0f) * positionOffset;
ViewHelper.setPivotX(left, left.getMeasuredWidth());
ViewHelper.setPivotY(left, left.getMeasuredHeight() * 0.5f);
ViewHelper.setRotationY(left, mRot);
}
if (right != null) {
manageLayer(right, true);
mRot = -(in ? 90.0f : -90.0f) * (1 - positionOffset);
ViewHelper.setPivotX(right, 0);
ViewHelper.setPivotY(right, right.getMeasuredHeight() * 0.5f);
ViewHelper.setRotationY(right, mRot);
}
}
}
private void animateAccordion(View left, View right, float positionOffset) {
if (mState != State.IDLE) {
if (left != null) {
manageLayer(left, true);
ViewHelper.setPivotX(left, left.getMeasuredWidth());
ViewHelper.setPivotY(left, 0);
ViewHelper.setScaleX(left, 1 - positionOffset);
}
if (right != null) {
manageLayer(right, true);
ViewHelper.setPivotX(right, 0);
ViewHelper.setPivotY(right, 0);
ViewHelper.setScaleX(right, positionOffset);
}
}
}
private void animateZoom(View left, View right, float positionOffset, boolean in) {
if (mState != State.IDLE) {
if (left != null) {
manageLayer(left, true);
mScale = in ? ZOOM_MAX + (1 - ZOOM_MAX) * (1 - positionOffset) :
1 + ZOOM_MAX - ZOOM_MAX * (1 - positionOffset);
ViewHelper.setPivotX(left, left.getMeasuredWidth() * 0.5f);
ViewHelper.setPivotY(left, left.getMeasuredHeight() * 0.5f);
ViewHelper.setScaleX(left, mScale);
ViewHelper.setScaleY(left, mScale);
}
if (right != null) {
manageLayer(right, true);
mScale = in ? ZOOM_MAX + (1 - ZOOM_MAX) * positionOffset :
1 + ZOOM_MAX - ZOOM_MAX * positionOffset;
ViewHelper.setPivotX(right, right.getMeasuredWidth() * 0.5f);
ViewHelper.setPivotY(right, right.getMeasuredHeight() * 0.5f);
ViewHelper.setScaleX(right, mScale);
ViewHelper.setScaleY(right, mScale);
}
}
}
private void animateRotate(View left, View right, float positionOffset, boolean up) {
if (mState != State.IDLE) {
if (left != null) {
manageLayer(left, true);
mRot = (up ? 1 : -1) * (ROT_MAX * positionOffset);
mTrans = (up ? -1 : 1) * (float) (getMeasuredHeight() - getMeasuredHeight() * Math.cos(mRot * Math.PI / 180.0f));
ViewHelper.setPivotX(left, left.getMeasuredWidth() * 0.5f);
ViewHelper.setPivotY(left, up ? 0 : left.getMeasuredHeight());
ViewHelper.setTranslationY(left, mTrans);
ViewHelper.setRotation(left, mRot);
}
if (right != null) {
manageLayer(right, true);
mRot = (up ? 1 : -1) * (-ROT_MAX + ROT_MAX * positionOffset);
mTrans = (up ? -1 : 1) * (float) (getMeasuredHeight() - getMeasuredHeight() * Math.cos(mRot * Math.PI / 180.0f));
ViewHelper.setPivotX(right, right.getMeasuredWidth() * 0.5f);
ViewHelper.setPivotY(right, up ? 0 : right.getMeasuredHeight());
ViewHelper.setTranslationY(right, mTrans);
ViewHelper.setRotation(right, mRot);
}
}
}
private void animateFlipHorizontal(View left, View right, float positionOffset, int positionOffsetPixels) {
if (mState != State.IDLE) {
if (left != null) {
manageLayer(left, true);
mRot = 180.0f * positionOffset;
if (mRot > 90.0f) {
left.setVisibility(View.INVISIBLE);
} else {
if (left.getVisibility() == View.INVISIBLE)
left.setVisibility(View.VISIBLE);
mTrans = positionOffsetPixels;
ViewHelper.setPivotX(left, left.getMeasuredWidth() * 0.5f);
ViewHelper.setPivotY(left, left.getMeasuredHeight() * 0.5f);
ViewHelper.setTranslationX(left, mTrans);
ViewHelper.setRotationY(left, mRot);
}
}
if (right != null) {
manageLayer(right, true);
mRot = -180.0f * (1 - positionOffset);
if (mRot < -90.0f) {
right.setVisibility(View.INVISIBLE);
} else {
if (right.getVisibility() == View.INVISIBLE)
right.setVisibility(View.VISIBLE);
mTrans = -getWidth() - getPageMargin() + positionOffsetPixels;
ViewHelper.setPivotX(right, right.getMeasuredWidth() * 0.5f);
ViewHelper.setPivotY(right, right.getMeasuredHeight() * 0.5f);
ViewHelper.setTranslationX(right, mTrans);
ViewHelper.setRotationY(right, mRot);
}
}
}
}
private void animateFlipVertical(View left, View right, float positionOffset, int positionOffsetPixels) {
if (mState != State.IDLE) {
if (left != null) {
manageLayer(left, true);
mRot = 180.0f * positionOffset;
if (mRot > 90.0f) {
left.setVisibility(View.INVISIBLE);
} else {
if (left.getVisibility() == View.INVISIBLE)
left.setVisibility(View.VISIBLE);
mTrans = positionOffsetPixels;
ViewHelper.setPivotX(left, left.getMeasuredWidth() * 0.5f);
ViewHelper.setPivotY(left, left.getMeasuredHeight() * 0.5f);
ViewHelper.setTranslationX(left, mTrans);
ViewHelper.setRotationX(left, mRot);
}
}
if (right != null) {
manageLayer(right, true);
mRot = -180.0f * (1 - positionOffset);
if (mRot < -90.0f) {
right.setVisibility(View.INVISIBLE);
} else {
if (right.getVisibility() == View.INVISIBLE)
right.setVisibility(View.VISIBLE);
mTrans = -getWidth() - getPageMargin() + positionOffsetPixels;
ViewHelper.setPivotX(right, right.getMeasuredWidth() * 0.5f);
ViewHelper.setPivotY(right, right.getMeasuredHeight() * 0.5f);
ViewHelper.setTranslationX(right, mTrans);
ViewHelper.setRotationX(right, mRot);
}
}
}
}
protected void animateStack(View left, View right, float positionOffset, int positionOffsetPixels) {
if (mState != State.IDLE) {
if (right != null) {
manageLayer(right, true);
mScale = (1 - SCALE_MAX) * positionOffset + SCALE_MAX;
mTrans = -getWidth() - getPageMargin() + positionOffsetPixels;
ViewHelper.setScaleX(right, mScale);
ViewHelper.setScaleY(right, mScale);
ViewHelper.setTranslationX(right, mTrans);
}
if (left != null) {
left.bringToFront();
}
}
}
@TargetApi(Build.VERSION_CODES.HONEYCOMB)
private void manageLayer(View v, boolean enableHardware) {
if (!API_11) return;
int layerType = enableHardware ? View.LAYER_TYPE_HARDWARE : View.LAYER_TYPE_NONE;
if (layerType != v.getLayerType())
v.setLayerType(layerType, null);
}
@TargetApi(Build.VERSION_CODES.HONEYCOMB)
private void disableHardwareLayer() {
if (!API_11) return;
View v;
for (int i = 0; i < getChildCount(); i++) {
v = getChildAt(i);
if (v.getLayerType() != View.LAYER_TYPE_NONE)
v.setLayerType(View.LAYER_TYPE_NONE, null);
}
}
private Matrix mMatrix = new Matrix();
private Camera mCamera = new Camera();
private float[] mTempFloat2 = new float[2];
protected float getOffsetXForRotation(float degrees, int width, int height) {
mMatrix.reset();
mCamera.save();
mCamera.rotateY(Math.abs(degrees));
mCamera.getMatrix(mMatrix);
mCamera.restore();
mMatrix.preTranslate(-width * 0.5f, -height * 0.5f);
mMatrix.postTranslate(width * 0.5f, height * 0.5f);
mTempFloat2[0] = width;
mTempFloat2[1] = height;
mMatrix.mapPoints(mTempFloat2);
return (width - mTempFloat2[0]) * (degrees > 0.0f ? 1.0f : -1.0f);
}
protected void animateFade(View left, View right, float positionOffset) {
if (left != null) {
ViewHelper.setAlpha(left, 1 - positionOffset);
}
if (right != null) {
ViewHelper.setAlpha(right, positionOffset);
}
}
protected void animateOutline(View left, View right) {
if (!(left instanceof OutlineContainer))
return;
if (mState != State.IDLE) {
if (left != null) {
manageLayer(left, true);
((OutlineContainer) left).setOutlineAlpha(1.0f);
}
if (right != null) {
manageLayer(right, true);
((OutlineContainer) right).setOutlineAlpha(1.0f);
}
} else {
if (left != null)
((OutlineContainer) left).start();
if (right != null)
((OutlineContainer) right).start();
}
}
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
if (mState == State.IDLE && positionOffset > 0) {
oldPage = getCurrentItem();
mState = position == oldPage ? State.GOING_RIGHT : State.GOING_LEFT;
}
boolean goingRight = position == oldPage;
if (mState == State.GOING_RIGHT && !goingRight)
mState = State.GOING_LEFT;
else if (mState == State.GOING_LEFT && goingRight)
mState = State.GOING_RIGHT;
float effectOffset = isSmall(positionOffset) ? 0 : positionOffset;
// mLeft = getChildAt(position);
// mRight = getChildAt(position+1);
mLeft = findViewFromObject(position);
mRight = findViewFromObject(position + 1);
if (mFadeEnabled)
animateFade(mLeft, mRight, effectOffset);
if (mOutlineEnabled)
animateOutline(mLeft, mRight);
switch (mEffect) {
case Standard:
break;
case Tablet:
animateTablet(mLeft, mRight, effectOffset);
break;
case CubeIn:
animateCube(mLeft, mRight, effectOffset, true);
break;
case CubeOut:
animateCube(mLeft, mRight, effectOffset, false);
break;
case FlipVertical:
animateFlipVertical(mLeft, mRight, positionOffset, positionOffsetPixels);
break;
case FlipHorizontal:
animateFlipHorizontal(mLeft, mRight, effectOffset, positionOffsetPixels);
case Stack:
animateStack(mLeft, mRight, effectOffset, positionOffsetPixels);
break;
case ZoomIn:
animateZoom(mLeft, mRight, effectOffset, true);
break;
case ZoomOut:
animateZoom(mLeft, mRight, effectOffset, false);
break;
case RotateUp:
animateRotate(mLeft, mRight, effectOffset, true);
break;
case RotateDown:
animateRotate(mLeft, mRight, effectOffset, false);
break;
case Accordion:
animateAccordion(mLeft, mRight, effectOffset);
break;
}
super.onPageScrolled(position, positionOffset, positionOffsetPixels);
if (effectOffset == 0) {
disableHardwareLayer();
mState = State.IDLE;
}
}
private boolean isSmall(float positionOffset) {
return Math.abs(positionOffset) < 0.0001;
}
public void setObjectForPosition(Object obj, int position) {
mObjs.put(Integer.valueOf(position), obj);
}
public View findViewFromObject(int position) {
Object o = mObjs.get(Integer.valueOf(position));
if (o == null) {
return null;
}
PagerAdapter a = getAdapter();
View v;
for (int i = 0; i < getChildCount(); i++) {
v = getChildAt(i);
if (a.isViewFromObject(v, o))
return v;
}
return null;
}
}