/// <summary>
/// Called after the controller’s view is loaded into memory.
/// </summary>
public override void ViewDidLoad()
{
base.ViewDidLoad();
if (PageNumber == -1)
{
View.BackgroundColor = UIColor.Clear;
}
else
{
View = new PageView(_ViewFrame, _AutoScaleMode, PageNumber);
}
}
/// <summary>
/// Called after the controller’s view is loaded into memory.
/// </summary>
public override void ViewDidLoad()
{
base.ViewDidLoad();
if (PageNumber == -1) {
View.BackgroundColor = UIColor.Clear;
} else {
View = new PageView(_ViewFrame, PageNumber);
}
}
/// <summary>
/// Sets equal zoomScale for all pages
/// </summary>
private void SetPagesEqualZoomScale(PageView pageView, float zoomScale)
{
foreach (var view in mPageViews) {
if (view != pageView) {
// Set equal zoomScale from all pageViews
view.ZoomScale = zoomScale;
// Offset pageView, to it don't overlapped
view.ContentOffset = CalcDefaultPageViewContentOffset();
}
}
}
/// <summary>
/// Opens document page
/// </summary>
/// <param name="pageNumber">Document page number</param>
public virtual void OpenDocumentPage(int pageNumber)
{
if (PDFDocument.DocumentHasLoaded && (pageNumber != PDFDocument.CurrentPageNumber)) {
if ((pageNumber < 1) || (pageNumber > PDFDocument.PageCount)) {
return;
}
// Set current page
PDFDocument.CurrentPageNumber = pageNumber;
// Calc min, max page
int minValue;
int maxValue;
if (PDFDocument.PageCount <= MaxPageViewsCount) {
minValue = 1;
maxValue = PDFDocument.PageCount;
} else {
minValue = PDFDocument.CurrentPageNumber - 1;
maxValue = PDFDocument.CurrentPageNumber + 1;
if (minValue < 1) {
minValue++;
maxValue++;
} else if (maxValue > PDFDocument.PageCount) {
minValue--;
maxValue--;
}
}
// Create/update page views for displayed pages
var unusedPageViews = new List<PageView>(mPageViews);
RectangleF viewRect = GetScrollViewSubViewFrame();
for (int i = minValue, j = 0; i <= maxValue; i++,j++) {
PageView pageView = mPageViews.FirstOrDefault(v => v.PageNumber == i);
if (pageView == null) {
pageView = new PageView(viewRect, i);
pageView.ZoomScale = mCurrentPageView != null ? mCurrentPageView.ZoomScale : pageView.MinimumZoomScale;
pageView.ContentOffset = CalcDefaultPageViewContentOffset();
pageView.ZoomingEnded += delegate(object sender, ZoomingEndedEventArgs e) {
SetPagesEqualZoomScale((PageView)sender, e.AtScale);
};
mScrollView.AddSubview(pageView);
mPageViews.Add(pageView);
} else {
pageView.Frame = viewRect;
pageView.PageNumber = i;
unusedPageViews.Remove(pageView);
}
viewRect = CalcFrameForNextPage(viewRect);
if (i == PDFDocument.CurrentPageNumber) {
mCurrentPageView = pageView;
}
}
// Clear unused page views
foreach (var view in unusedPageViews) {
view.RemoveFromSuperview();
mPageViews.Remove(view);
}
// Update scroll view content offset
UpdateScrollViewContentOffset();
// Update PageNumber label
if (mPageNumberLabel != null) {
mPageNumberLabel.Text = string.Format(@"{0}/{1}", PDFDocument.CurrentPageNumber, PDFDocument.PageCount);
}
// Update slider position
if (mSlider != null) {
mSlider.Value = PDFDocument.CurrentPageNumber;
}
}
}
