private void setBtnDisplay(ViewerPageButton b, bool active)
{
if (active)
{
if (_activeBtn != b)
{
_activeBtn?.SetActive(false);
}
_activeBtn = b;
}
b?.SetActive(active);
}
private void handlePageBtnClick(ViewerPageButton b)
{
if (b != _activeBtn && _nextActiveBtn == null)
{
_nextActiveBtn = b;
setBtnDisplay(b, true);
scrollToPageBtn(b);
_pageScroll.Post(() =>
{
OnPageButtonHit?.Invoke(b, EventArgs.Empty);
});
}
}
private void setActivePageLarge(int activePage)
{
if (_nextActiveBtn == null)
{
Post(() =>
{
ViewerPageButton b = (ViewerPageButton)_scrollContentLayout.GetChildAt(activePage - 1);
setBtnDisplay(b, true);
scrollToPageBtn(b);
});
}
else if (_nextActiveBtn.PageNumber == activePage)
{
_nextActiveBtn = null;
}
}
private bool scrollToPageBtn(ViewerPageButton b)
{
if (_scrollContentLayout.Width > _pageScroll.Width)
{
int scrollX = 0;
if (b.Left >= (_pageScroll.Width / 2.0f))
{
scrollX = (int)((b.Left + (b.Width / 2.0f)) - (_pageScroll.Width / 2.0f));
}
_pageScroll.ScrollTo(scrollX, 0);
return(scrollX != _pageScroll.ScrollX);
}
return(false);
}
private void addPageButtons(int pageCount, int activePage)
{
_scrollContentLayout.RemoveAllViewsInLayout();
for (int i = 1; i <= pageCount; i++)
{
ViewerPageButton b = new ViewerPageButton(Context);
b.PageNumber = i;
b.OnClick += handlePageBtnClick;
if (i == activePage)
{
_activeBtn = b;
}
b.SetActive(_activeBtn == b);
_scrollContentLayout.AddView(b);
}
}