package so.orion.slidebar;
import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.animation.ValueAnimator;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.graphics.RectF;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.StateListDrawable;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.view.animation.LinearInterpolator;
/**
* 项目名称：GBSlideBar
* 类描述：
* 创建人：Edanel
* 创建时间：16/1/14 下午4:48
* 修改人：Edanel
* 修改时间：16/1/14 下午4:48
* 修改备注：
*/
public class GBSlideBar extends View {
private static final String TAG = "edanelx";
private RectF mBackgroundPaddingRect;
private Drawable mBackgroundDrawable;
private boolean mFirstDraw = true;
private GBSlideBarAdapter mAdapter;
private int[][] mAnchor;
private boolean mModIsHorizontal = true;
private int mCurrentX, mCurrentY, mPivotX, mPivotY;
private boolean mSlide = false;
private static final int[] STATE_NORMAL = new int[]{};
private static final int[] STATE_SELECTED = new int[]{android.R.attr.state_selected};
private static final int[] STATE_PRESS = new int[]{android.R.attr.state_pressed};
private int[] mState = STATE_SELECTED;
private int mCurrentItem;
private int mAnchorWidth, mAnchorHeight;
private int mPlaceHolderWidth, mPlaceHolderHeight;
private int mTextMargin;
private int mType;
private Paint mPaint;
private int mTextSize;
private int mTextColor;
private int mLastX;
private int mSlideX, mSlideY;
private int mAbsoluteY;
private int mSelectedX;
private boolean mIsStartAnimation = false, mIsEndAnimation = false;
private ValueAnimator mStartAnim, mEndAnim;
private boolean mIsFirstSelect = true, mCanSelect = true;
private GBSlideBarListener gbSlideBarListener;
public GBSlideBar(Context context) {
super(context);
init(null, 0);
}
public GBSlideBar(Context context, AttributeSet attrs) {
super(context, attrs);
init(attrs, 0);
}
public GBSlideBar(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init(attrs, defStyleAttr);
}
private void init(AttributeSet attributeSet, int defStyleAttr) {
mBackgroundPaddingRect = new RectF();
TypedArray a = getContext().obtainStyledAttributes(attributeSet, R.styleable.GBSlideBar, defStyleAttr, 0);
mBackgroundPaddingRect.left = a.getDimension(R.styleable.GBSlideBar_gbs_paddingLeft, 0.0f);
mBackgroundPaddingRect.top = a.getDimension(R.styleable.GBSlideBar_gbs_paddingTop, 0.0f);
mBackgroundPaddingRect.right = a.getDimension(R.styleable.GBSlideBar_gbs_paddingRight, 0.0f);
mBackgroundPaddingRect.bottom = a.getDimension(R.styleable.GBSlideBar_gbs_paddingBottom, 0.0f);
mAnchorWidth = (int) a.getDimension(R.styleable.GBSlideBar_gbs_anchor_width, 50.0f);
mAnchorHeight = (int) a.getDimension(R.styleable.GBSlideBar_gbs_anchor_height, 50.0f);
mPlaceHolderWidth = (int) a.getDimension(R.styleable.GBSlideBar_gbs_placeholder_width, 20.0f);
mPlaceHolderHeight = (int) a.getDimension(R.styleable.GBSlideBar_gbs_placeholder_height, 20.0f);
mType = a.getInt(R.styleable.GBSlideBar_gbs_type, 1);
mBackgroundDrawable = a.getDrawable(R.styleable.GBSlideBar_gbs_background);
mTextSize = a.getDimensionPixelSize(R.styleable.GBSlideBar_gbs_textSize, 28);
mTextColor = a.getColor(R.styleable.GBSlideBar_gbs_textColor, Color.BLACK);
mTextMargin = (int) a.getDimension(R.styleable.GBSlideBar_gbs_text_margin, 0.0f);
a.recycle();
}
private void drawBackground() {
Rect rect = new Rect((int) mBackgroundPaddingRect.left + mAnchorWidth,
(int) mBackgroundPaddingRect.top,
(int) (getWidth() - mBackgroundPaddingRect.right - mAnchorWidth),
(int) (getHeight() - mBackgroundPaddingRect.bottom));
mBackgroundDrawable.setBounds(rect);
mAbsoluteY = (int) (mBackgroundPaddingRect.top - mBackgroundPaddingRect.bottom);
Log.d(TAG, "mAbsoluteY:" + mBackgroundPaddingRect.top + " : " + mBackgroundPaddingRect.bottom + " : " + (mBackgroundPaddingRect.top - mBackgroundPaddingRect.bottom));
mCurrentX = mPivotX = getWidth() / 2;
mCurrentY = mPivotY = getHeight() / 2;
int widthBase = rect.width() / getCount();
int widthHalf = widthBase / 2;
int heightBase = rect.height() / getCount();
int heightHalf = heightBase / 2;
mAnchor = new int[getCount()][2];
for (int i = 0, j = 1; i < getCount(); i++, j++) {
// if (mType == 1) {
if (i == 0) {
mAnchor[i][0] = mModIsHorizontal ? rect.left : mPivotX;
} else if (i == getCount() - 1) {
mAnchor[i][0] = mModIsHorizontal ? rect.right : mPivotX;
} else {
mAnchor[i][0] = mModIsHorizontal ? widthBase * j - widthHalf + rect.left : mPivotX;
}
mAnchor[i][1] = !mModIsHorizontal ? heightBase * j - heightHalf + rect.top : mPivotY + mAbsoluteY / 2;
// }
}
mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
mPaint.setTextSize(mTextSize);
mPaint.setColor(mTextColor);
mPaint.setTextAlign(Paint.Align.CENTER);
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
if (mFirstDraw) drawBackground();
if (mBackgroundDrawable != null) mBackgroundDrawable.draw(canvas);
if (isInEditMode()) return;
Drawable itemDefault, itemSlide;
StateListDrawable stateListDrawable;
if (!mSlide) {
int distance, minIndex = 0, minDistance = Integer.MAX_VALUE;
for (int i = 0; i < getCount(); i++) {
distance = Math.abs(mModIsHorizontal ? mAnchor[i][0] - mCurrentX : mAnchor[i][1] - mCurrentY);
if (minDistance > distance) {
minIndex = i;
minDistance = distance;
}
}
setCurrentItem(minIndex);
stateListDrawable = mAdapter.getItem(minIndex);
} else {
mSlide = false;
mCurrentX = mAnchor[mCurrentItem][0];
mCurrentY = mAnchor[mCurrentItem][1];
if (mFirstDraw) {
mSlideX = mLastX = mCurrentX;
}
stateListDrawable = mAdapter.getItem(mCurrentItem);
mIsFirstSelect = true;
}
stateListDrawable.setState(mState);
itemDefault = stateListDrawable.getCurrent();
for (int i = 0; i < getCount(); i++) {
if (i == mCurrentItem) {
// continue; //
mPaint.setColor(mAdapter.getTextColor(mCurrentItem));
canvas.drawText(mAdapter.getText(i), mAnchor[i][0], mAnchor[i][1] + mAnchorHeight * 3 / 2 + mTextMargin, mPaint);
}else {
mPaint.setColor(mTextColor);
canvas.drawText(mAdapter.getText(i), mAnchor[i][0], mAnchor[i][1] + mAnchorHeight * 3 / 2 + mTextMargin, mPaint);
}
stateListDrawable = mAdapter.getItem(i);
stateListDrawable.setState(STATE_NORMAL);
itemSlide = stateListDrawable.getCurrent();
itemSlide.setBounds(
mAnchor[i][0] - mPlaceHolderWidth,
mAnchor[i][1] - mPlaceHolderHeight,
mAnchor[i][0] + mPlaceHolderWidth,
mAnchor[i][1] + mPlaceHolderHeight
);
itemSlide.draw(canvas);
}
itemDefault.setBounds(
mSlideX - mAnchorWidth,
mPivotY + mAbsoluteY / 2 - mAnchorHeight,
mSlideX + mAnchorWidth,
mPivotY + mAbsoluteY / 2 + mAnchorHeight
);
itemDefault.draw(canvas);
setFirstDraw(false);
}
private void endSlide() {
if (mIsEndAnimation == false && mSlide) {
mIsEndAnimation = true;
mEndAnim = ValueAnimator.ofFloat(0.0f, 1.0f);
mEndAnim.setDuration(200);
mEndAnim.setInterpolator(new LinearInterpolator());
mEndAnim.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
mSlideX = (int) ((mCurrentX - mLastX) * animation.getAnimatedFraction() + mLastX);
mSlideY = (int) (mCurrentY * animation.getAnimatedFraction());
invalidate();
}
});
mEndAnim.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
mIsStartAnimation = false;
mLastX = mCurrentX;
mIsEndAnimation = false;
mCanSelect = true;
invalidate();
}
});
mEndAnim.start();
} else {
mLastX = mCurrentX;
mSlideX = mCurrentX;
invalidate();
}
}
private void startSlide() {
if (mIsStartAnimation == false && !mSlide && mCanSelect) {
mIsStartAnimation = true;
mStartAnim = ValueAnimator.ofFloat(0.0f, 1.0f);
mStartAnim.setDuration(200);
mStartAnim.setInterpolator(new LinearInterpolator());
mStartAnim.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
mSlideX = (int) ((mCurrentX - mLastX) * animation.getAnimatedFraction() + mLastX);
mSlideY = (int) (mCurrentY * animation.getAnimatedFraction());
invalidate();
}
});
mStartAnim.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
mLastX = mCurrentX;
mIsStartAnimation = false;
mCanSelect = true;
invalidate();
}
});
mStartAnim.start();
}
}
@Override
public boolean onTouchEvent(MotionEvent event) {
if (mCanSelect) {
int action = event.getAction();
//获取当前坐标
mCurrentX = mModIsHorizontal ? getNormalizedX(event) : mPivotX;
mCurrentY = !mModIsHorizontal ? (int) event.getY() : mPivotY;
mSlide = action == MotionEvent.ACTION_UP;
if (!mSlide && mIsFirstSelect) {
startSlide();
mIsFirstSelect = false;
} else if (mIsStartAnimation == false && mIsEndAnimation == false) {
endSlide();
}
mState = action == MotionEvent.ACTION_UP || action == MotionEvent.ACTION_CANCEL ? STATE_SELECTED : STATE_PRESS;
switch (action) {
case MotionEvent.ACTION_MOVE:
// if (BuildConfig.DEBUG) Log.d(TAG, "Move " + event.getX());
return true;
case MotionEvent.ACTION_DOWN:
Log.d(TAG, "Down " + event.getX());
return true;
case MotionEvent.ACTION_UP:
Log.d(TAG, "Up " + event.getX());
mCanSelect = false;
invalidate();
return true;
}
}
return super.onTouchEvent(event);
}
@Override
public boolean dispatchTouchEvent(MotionEvent event) {
getParent().requestDisallowInterceptTouchEvent(true);
return super.dispatchTouchEvent(event);
}
private int getNormalizedX(MotionEvent event) {
return Math.min(Math.max((int) event.getX(), mAnchorWidth), getWidth() - mAnchorWidth);
}
private void setFirstDraw(boolean firstDraw) {
mFirstDraw = firstDraw;
}
private int getCount() {
return isInEditMode() ? 3 : mAdapter.getCount();
}
private void setCurrentItem(int currentItem) {
if (mCurrentItem != currentItem && gbSlideBarListener != null) {
gbSlideBarListener.onPositionSelected(currentItem);
}
mCurrentItem = currentItem;
}
public void setAdapter(GBSlideBarAdapter adapter) {
mAdapter = adapter;
}
public void setPosition(int position) {
position = position < 0 ? 0 : position;
position = position > mAdapter.getCount() ? mAdapter.getCount() - 1 : position;
mCurrentItem = position;
mSlide = true;
invalidate();
}
public void setOnGbSlideBarListener(GBSlideBarListener listener) {
this.gbSlideBarListener = listener;
}
}