public void SetPage (Page p)
{
if (page != p) {
page = p;
UpdatePage ();
}
}
/*
* Render the page here: we assume we are already in a normalized coordinate system which maps
* our standard aspect ratio (3:4) to (1:1)
* The reason why we do this is to reuse the same drawing code for both the preview and the
* full screen; for full screen rendering, we map the whole view, whereas the preview maps
* the whole preview image to a quarter of the page.
* */
public RectangleF [] RenderPage (Page page, SizeF size, bool unstyledDrawing)
{
var pageRect = new RectangleF (0, 0, size.Width, size.Height);
var paragraphBounds = new RectangleF [page.Paragraphs.Count];
using (var ctxt = UIGraphics.GetCurrentContext ()) {
// fill background
ctxt.SetFillColor (UIColor.FromHSBA (0.11f, 0.2f, 1, 1).CGColor);
ctxt.FillRect (pageRect);
pageRect = pageRect.Inset (20, 20);
int i = 0;
foreach (var p in page.Paragraphs) {
var bounds = new RectangleF (pageRect.X, pageRect.Y, 0, 0);
if (UnstyledDrawing) {
var text = new NSString (page.StringForParagraph (p));
var font = UIFont.FromName ("HoeflerText-Regular", 24);
// draw text with the old legacy path, setting the font color to black.
ctxt.SetFillColor (UIColor.Black.CGColor);
bounds.Size = text.DrawString (pageRect, font);
} else {
// TODO: draw attributed text with new string drawing
var text = page.AttributedStringForParagraph (p);
var textContext = new NSStringDrawingContext ();
text.DrawString (pageRect, NSStringDrawingOptions.UsesLineFragmentOrigin, textContext);
bounds = textContext.TotalBounds;
bounds.Offset (pageRect.X, pageRect.Y);
}
paragraphBounds [i++] = bounds;
pageRect.Y += bounds.Height;
}
return paragraphBounds;
}
}
public UIImage RenderPagePreview (Page page, SizeF size)
{
UIGraphics.BeginImageContextWithOptions (size, true, 0.0f);
var scale = CGAffineTransform.MakeScale (0.5f, 0.5f);
UIGraphics.GetCurrentContext ().ConcatCTM (scale);
RenderPage (page, new SizeF (1024, 768), false);
var ret = UIGraphics.GetImageFromCurrentImageContext ();
UIGraphics.EndImageContext ();
return ret;
}
