/// <summary>
/// <inheritdoc/>
/// </summary>
protected override void OnRender(DrawingContext drawingContext)
{
if (drawingContext == null)
{
return;
}
base.OnRender(drawingContext);
// background
drawingContext.DrawRectangle(Background, null, new Rect(0, 0, Width, Height));
// left
drawingContext.DrawLine(new Pen(BorderBrush, BorderThickness.Left), new Point(0, 0), new Point(0, Height));
// top
drawingContext.DrawLine(new Pen(BorderBrush, BorderThickness.Top), new Point(0, 0), new Point(Width, 0));
// right
drawingContext.DrawLine(new Pen(BorderBrush, BorderThickness.Right), new Point(Width, 0), new Point(Width, Height));
// bottom
drawingContext.DrawLine(new Pen(BorderBrush, BorderThickness.Bottom), new Point(0, Height), new Point(Width, Height));
if (Page == null)
{
return;
}
try
{
var bitmap = new WriteableBitmap((int)Width, (int)Height, 96, 96, PixelFormats.Bgra32, null);
var format = BitmapFormatConverter.GetFormat(bitmap.Format);
bitmap.Lock();
Page.RenderThumbnailBitmap(format, bitmap.BackBuffer, bitmap.BackBufferStride);
bitmap.AddDirtyRect(new Int32Rect(0, 0, (int)Width, (int)Height));
bitmap.Unlock();
drawingContext.DrawImage(bitmap, new Rect(0, 0, Width, Height));
}
#pragma warning disable CA1031 // Do not catch general exception types
catch
{
}
#pragma warning restore CA1031 // Do not catch general exception types
}
private void RenderPages(DrawingContext drawingContext)
{
// Draw background
drawingContext.DrawRectangle(Background, null, new Rect(0, 0, ViewportWidth, ViewportHeight));
var newZoomFactor = PDFZoomComponent.CurrentZoomFactor;
var pageOnCenter = _renderedPages.FirstOrDefault(page => page.IsOnCenter);
if (pageOnCenter == null ||
_oldZoomFactor < 0d ||
Math.Abs(_oldZoomFactor - newZoomFactor) < double.Epsilon)
{
// Zoom factor was not changed or not preserved
// Determine pages to draw.
_renderedPages.Clear();
_renderedPages.AddRange(PDFPageComponent[PageLayoutType.Standard].DeterminePagesToRender(
VerticalOffset,
VerticalOffset + ViewportHeight,
PDFPageMargin,
PDFZoomComponent.CurrentZoomFactor,
true));
}
else
{
// Zoom factor was changed.
// Set 'predefined' top and bottom line.
// These lines will be probably changed in 'DeterminePagesToRender'
var topLine = VerticalOffset;
var bottomLine = topLine + ViewportHeight;
// Determine pages to draw.
_renderedPages.Clear();
_renderedPages.AddRange(PDFPageComponent[PageLayoutType.Standard].DeterminePagesToRender(
pageOnCenter,
ref topLine,
ref bottomLine,
PDFPageMargin,
PDFZoomComponent.CurrentZoomFactor));
_verticalOffset = topLine;
if (newZoomFactor < _oldZoomFactor)
{
HorizontalOffset = _horizontalOffset;
}
}
// Determine viewport rectangle
var viewportRectangle = new Rect(0, 0, _viewport.Width, _viewport.Height);
// Iterate the pages, adjust some values, and draw them.
foreach (var pageInfo in _renderedPages)
{
// Current page width
var currentPageWidth = pageInfo.Page.Width * PDFZoomComponent.CurrentZoomFactor;
// Center the page horizontally
if (ViewportWidth > _workArea.Width)
{
pageInfo.Left = (ViewportWidth / 2d) - (currentPageWidth / 2d);
pageInfo.Right = (ViewportWidth / 2d) + (currentPageWidth / 2d);
}
else
{
pageInfo.Left = (_workArea.Width / 2d) - (currentPageWidth / 2d);
pageInfo.Right = (_workArea.Width / 2d) + (currentPageWidth / 2d);
}
// Take offsets into account
pageInfo.Left -= HorizontalOffset;
pageInfo.Right -= HorizontalOffset;
pageInfo.Top -= VerticalOffset;
pageInfo.Bottom -= VerticalOffset;
var pageRect = new Rect(pageInfo.Left, pageInfo.Top, Math.Max(1d, pageInfo.Right - pageInfo.Left), Math.Max(0d, pageInfo.Bottom - pageInfo.Top));
var pageOnViewport = pageRect;
pageOnViewport.Intersect(viewportRectangle);
if (pageOnViewport.IsEmpty)
{
continue;
}
pageOnViewport.Width = Math.Max(1d, pageOnViewport.Width);
pageOnViewport.Height = Math.Max(1d, pageOnViewport.Height);
var pageRectForPDFium = pageRect;
pageRectForPDFium.Y = pageRect.Y > 0d ? 0d : pageRect.Y;
pageRectForPDFium.X = pageRect.X > 0d ? 0d : pageRect.X;
pageRectForPDFium.Width = Math.Max(1d, pageRectForPDFium.Width);
pageRectForPDFium.Height = Math.Max(1d, pageRectForPDFium.Height);
// Draw page background
drawingContext.DrawRectangle(PDFPageBackground, null, new Rect(pageRect.TopLeft, pageRect.BottomRight));
try
{
var bitmap = new WriteableBitmap((int)pageOnViewport.Width, (int)pageOnViewport.Height, 96, 96, PixelFormats.Bgra32, null);
var format = BitmapFormatConverter.GetFormat(bitmap.Format);
bitmap.Lock();
pageInfo.Page.RenderPageBitmap(
PDFZoomComponent.CurrentZoomFactor,
(int)pageRectForPDFium.X,
(int)pageRectForPDFium.Y,
(int)pageRectForPDFium.Width,
(int)pageRectForPDFium.Height,
(int)pageOnViewport.Width,
(int)pageOnViewport.Height,
format,
bitmap.BackBuffer,
bitmap.BackBufferStride);
bitmap.AddDirtyRect(new Int32Rect(0, 0, (int)pageOnViewport.Width, (int)pageOnViewport.Height));
bitmap.Unlock();
// Draw page content.
drawingContext.DrawImage(bitmap, new Rect(pageOnViewport.TopLeft, pageOnViewport.BottomRight));
}
#pragma warning disable CA1031 // Do not catch general exception types
catch
{
}
#pragma warning restore CA1031 // Do not catch general exception types
}
// Draw background border - left
drawingContext.DrawLine(new Pen(BorderBrush, BorderThickness.Left), new Point(0, 0), new Point(0, ViewportHeight));
// Draw background border - top
drawingContext.DrawLine(new Pen(BorderBrush, BorderThickness.Top), new Point(0, 0), new Point(ViewportWidth, 0));
// Draw background border - right
drawingContext.DrawLine(new Pen(BorderBrush, BorderThickness.Right), new Point(ViewportWidth, 0), new Point(ViewportWidth, ViewportHeight));
// Draw background border - bottom
drawingContext.DrawLine(new Pen(BorderBrush, BorderThickness.Bottom), new Point(0, ViewportHeight), new Point(ViewportWidth, ViewportHeight));
RenderDebugInfo(drawingContext, _renderedPages);
_oldZoomFactor = PDFZoomComponent.CurrentZoomFactor;
}
private void RenderPages(DrawingContext drawingContext)
{
// Draw background
drawingContext.DrawRectangle(Background, null, new Rect(0, 0, ViewportWidth, ViewportHeight));
var pageOnCenter = _renderedPages.FirstOrDefault(page => page.IsOnCenter);
// Determine pages to draw.
_renderedPages.Clear();
_renderedPages.AddRange(PDFPageComponent[PageLayoutType.Thumbnail].DeterminePagesToRender(
VerticalOffset,
VerticalOffset + ViewportHeight,
2d * FontSize,
_thumbnailZoomFactor));
// Determine viewport rectangle
var viewportRectangle = new Rect(0, 0, _viewport.Width, _viewport.Height);
// Iterate the pages, adjust some values, and draw them.
foreach (var pageInfo in _renderedPages)
{
// Current page width
var currentPageWidth = pageInfo.Page.ThumbnailWidth * _thumbnailZoomFactor;
// Center the page horizontally
pageInfo.Left = (ViewportWidth / 2d) - (currentPageWidth / 2d);
pageInfo.Right = (ViewportWidth / 2d) + (currentPageWidth / 2d);
// Take offsets into account
pageInfo.Left -= HorizontalOffset;
pageInfo.Right -= HorizontalOffset;
pageInfo.Top -= VerticalOffset;
pageInfo.Bottom -= VerticalOffset;
var pageRect = new Rect(pageInfo.Left, pageInfo.Top, Math.Max(1d, pageInfo.Right - pageInfo.Left), Math.Max(0d, pageInfo.Bottom - pageInfo.Top));
////////var pageOnViewport = pageRect;
////////pageOnViewport.Intersect(viewportRectangle);
////////if (pageOnViewport.IsEmpty)
////////{
//////// continue;
////////}
////////pageOnViewport.Width = Math.Max(1d, pageOnViewport.Width);
////////pageOnViewport.Height = Math.Max(1d, pageOnViewport.Height);
var pageRectForPDFium = pageRect;
pageRectForPDFium.Y = pageRect.Y > 0d ? 0d : pageRect.Y;
pageRectForPDFium.X = pageRect.X > 0d ? 0d : pageRect.X;
pageRectForPDFium.Width = Math.Max(1d, pageRectForPDFium.Width);
pageRectForPDFium.Height = Math.Max(1d, pageRectForPDFium.Height);
// Draw page background
drawingContext.DrawRectangle(PDFPageBackground, null, new Rect(pageRect.TopLeft, pageRect.BottomRight));
try
{
var bitmap = new WriteableBitmap((int)pageInfo.Page.ThumbnailWidth, (int)pageInfo.Page.ThumbnailHeight, 96, 96, PixelFormats.Bgra32, null);
var format = BitmapFormatConverter.GetFormat(bitmap.Format);
bitmap.Lock();
pageInfo.Page.RenderThumbnailBitmap(format, bitmap.BackBuffer, bitmap.BackBufferStride);
bitmap.AddDirtyRect(new Int32Rect(0, 0, (int)pageRect.Width, (int)pageRect.Height));
bitmap.Unlock();
// Draw page content.
drawingContext.DrawImage(bitmap, new Rect(pageRect.TopLeft, pageRect.BottomRight));
}
#pragma warning disable CA1031 // Do not catch general exception types
catch
{
}
#pragma warning restore CA1031 // Do not catch general exception types
// Draw page label
var ft = new FormattedText(
pageInfo.Page.PageLabel,
CultureInfo.InvariantCulture,
FlowDirection.LeftToRight,
new Typeface(FontFamily, FontStyle, FontWeight, FontStretch),
FontSize,
Foreground,
VisualTreeHelper.GetDpi(this).PixelsPerDip);
var textLocation = new Point(pageInfo.Left + ((pageInfo.Right - pageInfo.Left) / 2d) - (ft.WidthIncludingTrailingWhitespace / 2), pageInfo.Bottom);
drawingContext.DrawText(ft, textLocation);
// Draw page border - left
drawingContext.DrawLine(new Pen(PDFPageBorderBrush, PDFPageBorderThickness.Left), new Point(pageInfo.Left, pageInfo.Top), new Point(pageInfo.Left, pageInfo.Bottom));
// Draw page border - top
drawingContext.DrawLine(new Pen(PDFPageBorderBrush, PDFPageBorderThickness.Top), new Point(pageInfo.Left, pageInfo.Top), new Point(pageInfo.Right, pageInfo.Top));
// Draw page border - right
drawingContext.DrawLine(new Pen(PDFPageBorderBrush, PDFPageBorderThickness.Right), new Point(pageInfo.Right, pageInfo.Top), new Point(pageInfo.Right, pageInfo.Bottom));
// Draw page border - bottom
drawingContext.DrawLine(new Pen(PDFPageBorderBrush, PDFPageBorderThickness.Bottom), new Point(pageInfo.Left, pageInfo.Bottom), new Point(pageInfo.Right, pageInfo.Bottom));
}
// Draw background border - left
drawingContext.DrawLine(new Pen(BorderBrush, BorderThickness.Left), new Point(0, 0), new Point(0, ViewportHeight));
// Draw background border - top
drawingContext.DrawLine(new Pen(BorderBrush, BorderThickness.Top), new Point(0, 0), new Point(ViewportWidth, 0));
// Draw background border - right
drawingContext.DrawLine(new Pen(BorderBrush, BorderThickness.Right), new Point(ViewportWidth, 0), new Point(ViewportWidth, ViewportHeight));
// Draw background border - bottom
drawingContext.DrawLine(new Pen(BorderBrush, BorderThickness.Bottom), new Point(0, ViewportHeight), new Point(ViewportWidth, ViewportHeight));
}
