private void updatePanelForExpansion(float percentage){
  updatePromoVisibility(1.f);
  float baseBaseY=MathUtils.interpolate(0.f,getBasePageTargetY(),percentage);
  mBasePageY=baseBaseY;
  float brightness=MathUtils.interpolate(BASE_PAGE_BRIGHTNESS_STATE_PEEKED,BASE_PAGE_BRIGHTNESS_STATE_EXPANDED,percentage);
  mBasePageBrightness=brightness;
  float searchBarHeight=Math.round(MathUtils.interpolate(mSearchBarHeightPeeking,getSearchBarHeightExpanded(),percentage));
  mSearchBarHeight=searchBarHeight;
  mSearchBarTextOpacity=1.f;
  mIsSearchBarBorderVisible=true;
  mSearchBarBorderY=searchBarHeight - SEARCH_BAR_BORDER_HEIGHT_DP + 1;
  mSearchIconOpacity=SEARCH_ICON_OPACITY_STATE_EXPANDED;
  mArrowIconOpacity=ARROW_ICON_OPACITY_STATE_EXPANDED;
  mArrowIconRotation=Math.round(MathUtils.interpolate(ARROW_ICON_ROTATION_STATE_PEEKED,ARROW_ICON_ROTATION_STATE_EXPANDED,percentage));
  mCloseIconOpacity=CLOSE_ICON_OPACITY_STATE_EXPANDED;
  float peekedHeight=getPanelHeightFromState(PanelState.PEEKED);
  float threshold=PROGRESS_BAR_VISIBILITY_THRESHOLD_DP / mPxToDp;
  float diff=Math.min(mHeight - peekedHeight,threshold);
  float progressBarOpacity=MathUtils.interpolate(0.f,1.f,diff / threshold);
  mProgressBarOpacity=progressBarOpacity;
  mProgressBarY=searchBarHeight - PROGRESS_BAR_HEIGHT_DP + 1;
  updateSearchBarShadow();
}

private void updatePanelForExpansion ( float percentage ) { updatePromoVisibility ( 1.f ) ; float baseBaseY = MathUtils . interpolate ( 0.f , getBasePageTargetY ( ) , percentage ) ; mBasePageY = baseBaseY ; float brightness = MathUtils . interpolate ( BASE_PAGE_BRIGHTNESS_STATE_PEEKED , BASE_PAGE_BRIGHTNESS_STATE_EXPANDED , percentage ) ; mBasePageBrightness = brightness ; float searchBarHeight = Math . round ( MathUtils . interpolate ( mSearchBarHeightPeeking , getSearchBarHeightExpanded ( ) , percentage ) ) ; mSearchBarHeight = searchBarHeight ; mSearchBarTextOpacity = 1.f ; mIsSearchBarBorderVisible = true ; mSearchBarBorderY = searchBarHeight - SEARCH_BAR_BORDER_HEIGHT_DP + 1 ; mSearchIconOpacity = SEARCH_ICON_OPACITY_STATE_EXPANDED ; mArrowIconOpacity = ARROW_ICON_OPACITY_STATE_EXPANDED ; mArrowIconRotation = Math . round ( MathUtils . interpolate ( ARROW_ICON_ROTATION_STATE_PEEKED , ARROW_ICON_ROTATION_STATE_EXPANDED , percentage ) ) ; mCloseIconOpacity = CLOSE_ICON_OPACITY_STATE_EXPANDED ; float peekedHeight = getPanelHeightFromState ( PanelState . PEEKED ) ; float threshold = PROGRESS_BAR_VISIBILITY_THRESHOLD_DP / mPxToDp ; float diff = Math . min ( mHeight - peekedHeight , threshold ) ; float progressBarOpacity = MathUtils . interpolate ( 0.f , 1.f , diff / threshold ) ; mProgressBarOpacity = progressBarOpacity ; mProgressBarY = searchBarHeight - PROGRESS_BAR_HEIGHT_DP + 1 ; updateSearchBarShadow ( ) ; }
updates the ui state for the peeked to expanded transition ( and vice versa ) , according to a completion | percentage | .
