@Override
  protected void onSizeChanged(int w, int h, int oldw, int oldh) {
    super.onSizeChanged(w, h, oldw, oldh);
    this.width = w;
    this.height = h;
    itemWidth = Math.min(itemWidth, width);
    int number = height / itemHeight;
    if ((number & 1) == 1) {
      this.numberPerPage = number;
    } else {
      this.numberPerPage = number - 1;
    }
    this.topBottomPadding = (height - numberPerPage * itemHeight) / 2;
    this.leftRightPadding = (width - itemWidth) / 2;
    this.originalSelectedIndex = 0;
    this.selectedIndex = 0;

    itemList = new ArrayList<ItemView>();
    for (int i = -numberPerPage / 2; i < stringList.size() + numberPerPage / 2; i++) {
      ItemView itemView = new ItemView(getContext());
      itemView.setIndex(i);
      itemView.setyOffset((i + numberPerPage / 2) * itemHeight);
      LogUtil.i("chenxu", "onSizeChanged:i:" + i + " yoffset:" + itemView.getyOffset());
      if (i >= 0 && i < stringList.size()) {
        itemView.setText(stringList.get(i));
      } else {
        itemView.setText("");
      }
      itemList.add(itemView);
    }
  }
 @Override
 protected void onDraw(Canvas canvas) {
   super.onDraw(canvas);
   LogUtil.i("chenxu", "---------------------------------");
   for (int i = 0; i < itemList.size(); i++) {
     ItemView itemView = itemList.get(i);
     LogUtil.i("chenxu", "onDraw:i:" + i + " yoffset:" + itemView.getyOffset());
     // if (isInView(itemView.getIndex())) {
     itemView.drawSelf(canvas);
     // }
   }
   LogUtil.i("chenxu", "---------------------------------");
 }
Esempio n. 3
0
 public void scrollLeft(int velocityX) {
   int processedVelocityX = velocityX / 2;
   int index = (int) (getScrollX() + itemWidth / 2) / itemWidth;
   int currentScrollX = padNumber * itemWidth + itemWidth / 2 + getScrollX();
   int leftScrollX = padNumber * itemWidth + itemWidth / 2 + Math.max(0, index) * itemWidth;
   int rightScrollX =
       padNumber * itemWidth
           + itemWidth / 2
           + Math.min(imageViewList.size() - 1, index + 1) * itemWidth;
   int dx = 0;
   int leftAbs = Math.abs(currentScrollX - leftScrollX);
   int rightAbs = Math.abs(currentScrollX - rightScrollX);
   if (leftAbs >= rightAbs) {
     dx = -processedVelocityX / itemWidth * itemWidth - (rightScrollX - currentScrollX);
   } else {
     dx = -processedVelocityX / itemWidth * itemWidth + (currentScrollX - leftScrollX);
   }
   while (dx > (itemWidth * (imageIdList.size() - 1) - getScrollX())) {
     dx -= itemWidth;
   }
   int duration = (int) Math.abs(500.0f / itemWidth * dx);
   LogUtil.i("chenxu", "scrollLeft dx:" + dx + " duration:" + duration);
   scroller.startScroll(getScrollX(), 0, dx, 0, duration);
   invalidate();
 }
  @Override
  public void computeScroll() {
    super.computeScroll();
    if (scroller.computeScrollOffset()) {
      LogUtil.i("chenxu", "scroller.getCurrentY():" + scroller.getCurrY());
      scrollTo(0, scroller.getCurrY());
      postInvalidate();
    } else {
      // setCurrentIndex(Math.min(list.size() - 1,
      // Math.max(0, currentIndex + (int) (velocity / 20))));

    }
  }
Esempio n. 5
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 public boolean onSingleTapUp(MotionEvent e) {
   //			LogUtil.i("chenxu", "onSingleTapUp e.getX():" + e.getX()
   //					+ " e.getRawX():" + e.getRawX());
   int index = (int) (e.getX() + getScrollX() - padNumber * itemWidth) / itemWidth;
   LogUtil.i("chenxu", "calculated index:" + index);
   if (isIndexValid(index)) {
     if (listener != null) {
       listener.coverFlowDidClick(index);
     }
     return true;
   } else {
     return false;
   }
 };
 public void moveByOffset(float offset, float accumulatedOffset) {
   for (int i = 0; i < itemList.size(); i++) {
     ItemView itemView = itemList.get(i);
     itemView.setyOffset((int) (itemView.getyOffset() + offset));
     ;
   }
   selectedIndex =
       (int)
           Math.min(
               stringList.size(),
               Math.max(
                   0,
                   (originalSelectedIndex - (accumulatedOffset + itemHeight / 2) / itemHeight)));
   LogUtil.i("chenxu", "moveByOffset-selectedIndex:" + selectedIndex);
   invalidate();
 }
Esempio n. 7
0
 public void scrollBack() {
   int index = (int) (getScrollX() + itemWidth / 2) / itemWidth;
   int currentScrollX = padNumber * itemWidth + itemWidth / 2 + getScrollX();
   int leftScrollX = padNumber * itemWidth + itemWidth / 2 + Math.max(0, index) * itemWidth;
   int rightScrollX =
       padNumber * itemWidth
           + itemWidth / 2
           + Math.min(imageViewList.size() - 1, index + 1) * itemWidth;
   int dx = 0;
   int leftAbs = Math.abs(currentScrollX - leftScrollX);
   int rightAbs = Math.abs(currentScrollX - rightScrollX);
   if (leftAbs >= rightAbs) {
     dx = -(rightScrollX - currentScrollX);
   } else {
     dx = currentScrollX - leftScrollX;
   }
   int duration = (int) Math.abs(500.0f / itemWidth * dx);
   LogUtil.i("chenxu", "scrollBack dx:" + dx + " duration:" + duration);
   scroller.startScroll(getScrollX(), 0, dx, 0, duration);
   invalidate();
 }