public void OnPageScrollStateChanged(int state)
{
if (Settings.DisplayToolbarWhenSwipe)
{
MaterialViewPagerHelper.GetAnimator(Context).OnViewPagerPageChanged();
}
}
protected override IParcelable OnSaveInstanceState()
{
IParcelable superState = base.OnSaveInstanceState();
SavedState ss = new SavedState(superState)
{
Settings = Settings,
YOffset = MaterialViewPagerHelper.GetAnimator(Context).LastYOffset
};
//end
return(ss);
}
private void SetMaterialHeight()
{
//get the MaterialViewPagerAnimator attached to this activity
//to retrieve the declared header height
//and set it as current view height (+10dp margin)
MaterialViewPagerAnimator animator = MaterialViewPagerHelper.GetAnimator(Context);
if (animator != null)
{
ViewGroup.LayoutParams param = LayoutParameters;
param.Height = (int)Math.Round(Utils.DpToPx(animator.GetHeaderHeight() + 10, Context));
LayoutParameters = param;
}
}
protected override void OnRestoreInstanceState(IParcelable state)
{
SavedState ss = (SavedState)state;
base.OnRestoreInstanceState(ss.SuperState);
Settings = ss.Settings;
if (HeaderBackground != null)
{
HeaderBackground.SetBackgroundColor(new Color(Settings.Color));
}
MaterialViewPagerAnimator animator = MaterialViewPagerHelper.GetAnimator(Context);
//-1*ss.yOffset restore to 0
animator.RestoreScroll(-1 * ss.YOffset, ss.Settings);
MaterialViewPagerHelper.Register(Context, animator);
}
protected override void OnFinishInflate()
{
base.OnFinishInflate();
//add @layout/material_view_pager_layout as child, containing all the MaterialViewPager views
AddView(LayoutInflater.From(Context).Inflate(Resource.Layout.material_view_pager_layout, this, false));
_headerBackgroundContainer = FindViewById <ViewGroup>(Resource.Id.headerBackgroundContainer);
_pagerTitleStripContainer = FindViewById <ViewGroup>(Resource.Id.pagerTitleStripContainer);
_logoContainer = FindViewById <ViewGroup>(Resource.Id.logoContainer);
MToolbar = FindViewById <Toolbar>(Resource.Id.toolbar);
if (Settings.DisableToolbar)
{
MToolbar.Visibility = ViewStates.Invisible;
}
MViewPager = FindViewById <ViewPager>(Resource.Id.viewPager);
MViewPager.AddOnPageChangeListener(this);
//inflate subviews defined in attributes
{
int headerId = Settings.HeaderLayoutId;
if (headerId == -1)
{
headerId = Settings.AnimatedHeaderImage ? Resource.Layout.material_view_pager_moving_header : Resource.Layout.material_view_pager_imageview_header;
}
_headerBackgroundContainer.AddView(LayoutInflater.From(Context).Inflate(headerId, _headerBackgroundContainer, false));
}
if (IsInEditMode)
{ //preview titlestrip
//add fake tabs on edit mode
Settings.PagerTitleStripId = Resource.Layout.tools_material_view_pager_pagertitlestrip;
}
if (Settings.PagerTitleStripId != -1)
{
_pagerTitleStripContainer.AddView(LayoutInflater.From(Context).Inflate(Settings.PagerTitleStripId, _pagerTitleStripContainer, false));
}
if (Settings.LogoLayoutId != -1)
{
_logoContainer.AddView(LayoutInflater.From(Context).Inflate(Settings.LogoLayoutId, _logoContainer, false));
if (Settings.LogoMarginTop != 0)
{
RelativeLayout.LayoutParams layoutParams = (RelativeLayout.LayoutParams)_logoContainer.LayoutParameters;
layoutParams.SetMargins(0, Settings.LogoMarginTop, 0, 0);
_logoContainer.LayoutParameters = layoutParams;
}
}
HeaderBackground = FindViewById(Resource.Id.headerBackground);
ToolbarLayoutBackground = FindViewById(Resource.Id.toolbar_layout_background);
InitialiseHeights();
//construct the materialViewPagerHeader with subviews
if (!IsInEditMode)
{
MaterialViewPagerHeader = MaterialViewPagerHeader
.WithToolbar(MToolbar)
.WithToolbarLayoutBackground(ToolbarLayoutBackground)
.WithPagerSlidingTabStrip(_pagerTitleStripContainer)
.WithHeaderBackground(HeaderBackground)
.WithStatusBackground(FindViewById(Resource.Id.statusBackground))
.WithLogo(_logoContainer);
//and construct the MaterialViewPagerAnimator
//attach it to the activity to enable MaterialViewPagerHeaderView.setMaterialHeight();
MaterialViewPagerHelper.Register(Context, new MaterialViewPagerAnimator(this));
}
else
{
//if in edit mode, add fake cardsviews
View sample = LayoutInflater.From(Context).Inflate(Resource.Layout.tools_list_items, _pagerTitleStripContainer, false);
LayoutParams param = (LayoutParams)sample.LayoutParameters;
int marginTop = (int)Math.Round(Utils.DpToPx(Settings.HeaderHeight + 10, Context));
param.SetMargins(0, marginTop, 0, 0);
LayoutParameters = param;
AddView(sample);
}
}
protected override void OnDetachedFromWindow()
{
MaterialViewPagerHelper.Unregister(Context);
Listener = null;
base.OnDetachedFromWindow();
}
/**
* Change the header color
*/
public void SetColor(int color, int fadeDuration)
{
MaterialViewPagerHelper.GetAnimator(Context).SetColor(color, fadeDuration * 2);
}
