/** Override method to configure the dragged view and secondView layout properly. */
@Override
protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
if (isInEditMode()) super.onLayout(changed, left, top, right, bottom);
else if (isDragViewAtTop()) {
dragView.layout(left, top, right, transformer.getOriginalHeight());
secondView.layout(left, transformer.getOriginalHeight(), right, bottom);
ViewHelper.setY(dragView, top);
ViewHelper.setY(secondView, transformer.getOriginalHeight());
} else {
secondView.layout(left, transformer.getOriginalHeight(), right, bottom);
}
}
void setDegree(float degree) {
mValue = degree;
View clipView = mTarget.get();
float x = mArcMetric.getAxisPoint().x + mArcMetric.mRadius * Utils.cos(degree);
float y = mArcMetric.getAxisPoint().y - mArcMetric.mRadius * Utils.sin(degree);
ViewHelper.setX(clipView, x - clipView.getWidth() / 2);
ViewHelper.setY(clipView, y - clipView.getHeight() / 2);
}
/** At this time, we can get view size in dialog(可以获得对话框内视图大小) */
@Override
public void onLayoutObtain() {
int x = mX;
int y = mY;
if (mGravity == Gravity.TOP) {
y = mY - mLlContent.getHeight();
}
if (mAlignCenter) {
x = mX + mAnchorView.getWidth() / 2 - mLlContent.getWidth() / 2;
}
x = getX(x);
y = getY(y);
x = getX(x + dp2px(mXOffset));
y = getY(y + dp2px(mYOffset));
ViewHelper.setX(mLlContent, x);
ViewHelper.setY(mLlContent, y);
}
@Override
protected void onScrollChanged(int l, int t, int oldl, int oldt) {
// 首次使用获取banner初始高度和宽度
if (originHeight == -1 || originWidth == -1) {
originHeight = mTopView.getHeight();
originWidth = mTopView.getWidth();
}
// t为ScrollView向上滑动的量， 两者相减即为当前banner所需的高度
int height = originHeight - t;
// 计算缩放比例
float newRatio = (float) height / (float) originHeight;
// 修改banner的属性
if (height >= 0) {
ViewHelper.setScaleX(mTopView, newRatio);
ViewHelper.setScaleY(mTopView, newRatio);
ViewHelper.setY(mTopView, t / 2);
ViewHelper.setAlpha(mTopView, newRatio);
}
super.onScrollChanged(l, t, oldl, oldt);
}
public void setY(float y) {
ViewHelper.setY(this, y);
}
/** Modify secondView position to be always below dragged view. */
void changeSecondViewPosition() {
ViewHelper.setY(secondView, dragView.getBottom());
}
/**
* Called when a scroller(RecyclerView/ListView,ScrollView,WebView) scrolled by the user
*
* @param source the scroller
* @param yOffset the scroller current yOffset
*/
public boolean onMaterialScrolled(Object source, float yOffset) {
if (initialDistance == -1 || initialDistance == 0) {
initialDistance = mHeader.mPagerSlidingTabStrip.getTop() - mHeader.toolbar.getBottom();
}
// only if yOffset changed
if (yOffset == lastYOffset) return false;
float scrollTop = -yOffset;
{
// parallax scroll of the Background ImageView (the KenBurnsView)
if (mHeader.headerBackground != null) {
if (this.settings.parallaxHeaderFactor != 0)
ViewHelper.setTranslationY(
mHeader.headerBackground, scrollTop / this.settings.parallaxHeaderFactor);
if (ViewHelper.getY(mHeader.headerBackground) >= 0)
ViewHelper.setY(mHeader.headerBackground, 0);
}
}
if (ENABLE_LOG) Log.d("yOffset", "" + yOffset);
// dispatch the new offset to all registered scrollables
dispatchScrollOffset(source, minMax(0, yOffset, scrollMaxDp));
float percent = yOffset / scrollMax;
if (ENABLE_LOG) Log.d("percent1", "" + percent);
if (percent != 0) {
// distance between pager & toolbar
float newDistance =
ViewHelper.getY(mHeader.mPagerSlidingTabStrip) - mHeader.toolbar.getBottom();
percent = 1 - newDistance / initialDistance;
if (ENABLE_LOG) Log.d("percent2", "" + percent);
}
if (Float.isNaN(percent)) // fix for orientation change
return false;
// fix quick scroll
if (percent == 0 && headerAnimator != null) {
cancelHeaderAnimator();
ViewHelper.setTranslationY(mHeader.toolbarLayout, 0);
}
percent = minMax(0, percent, 1);
{
if (!settings.toolbarTransparent) {
// change color of toolbar & viewpager indicator & statusBaground
setColorPercent(percent);
} else {
if (justToolbarAnimated) {
if (toolbarJoinsTabs()) setColorPercent(1);
else if (lastPercent != percent) {
animateColorPercent(0, 200);
}
}
}
lastPercent = percent; // save the percent
if (mHeader.mPagerSlidingTabStrip != null) { // move the viewpager indicator
// float newY = ViewHelper.getY(mHeader.mPagerSlidingTabStrip) + scrollTop;
if (ENABLE_LOG) Log.d(TAG, "" + scrollTop);
// mHeader.mPagerSlidingTabStrip.setTranslationY(mHeader.getToolbar().getBottom()-mHeader.mPagerSlidingTabStrip.getY());
if (scrollTop <= 0) {
ViewHelper.setTranslationY(mHeader.mPagerSlidingTabStrip, scrollTop);
ViewHelper.setTranslationY(mHeader.toolbarLayoutBackground, scrollTop);
// when
if (ViewHelper.getY(mHeader.mPagerSlidingTabStrip) < mHeader.getToolbar().getBottom()) {
float ty = mHeader.getToolbar().getBottom() - mHeader.mPagerSlidingTabStrip.getTop();
ViewHelper.setTranslationY(mHeader.mPagerSlidingTabStrip, ty);
ViewHelper.setTranslationY(mHeader.toolbarLayoutBackground, ty);
}
}
}
if (mHeader.mLogo != null) { // move the header logo to toolbar
if (this.settings.hideLogoWithFade) {
ViewHelper.setAlpha(mHeader.mLogo, 1 - percent);
ViewHelper.setTranslationY(
mHeader.mLogo, (mHeader.finalTitleY - mHeader.originalTitleY) * percent);
} else {
ViewHelper.setTranslationY(
mHeader.mLogo, (mHeader.finalTitleY - mHeader.originalTitleY) * percent);
ViewHelper.setTranslationX(
mHeader.mLogo, (mHeader.finalTitleX - mHeader.originalTitleX) * percent);
float scale = (1 - percent) * (1 - mHeader.finalScale) + mHeader.finalScale;
setScale(scale, mHeader.mLogo);
}
}
if (this.settings.hideToolbarAndTitle && mHeader.toolbarLayout != null) {
boolean scrollUp = lastYOffset < yOffset;
if (scrollUp) {
scrollUp(yOffset);
} else {
scrollDown(yOffset);
}
}
}
if (headerAnimator != null && percent < 1) {
cancelHeaderAnimator();
}
lastYOffset = yOffset;
return true;
}